Consolidated statement of changes in equity
millions of €  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
        
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
  | 
            Issued capital and reserves attributable to owners of the parent  | 
            Issued capital and reserves attributable to owners of the parent  | 
            Total  | 
            Non-controlling interests  | 
            Total shareholders’ equity  | 
            
  | 
        |||||||||||||
  | 
            Equity contributed  | 
            Consolidated shareholders’ equity generated  | 
            
  | 
            Total other comprehensive income  | 
            
  | 
            
  | 
            
  | 
        ||||||||||||
  | 
            Number of shares thousands  | 
            Issued capital  | 
            Treasury shares  | 
            Capital reserves  | 
            Retained earnings including carryforwards  | 
            Net profit (loss)  | 
            
  | 
            Translation of foreign operations  | 
            Revaluation surplus  | 
            Equity instruments measured at fair value through other comprehensive income (IFRS 9)  | 
            Debt instruments measured at fair value through other comprehensive income (IFRS 9)  | 
            Hedging instruments: designated risk components (IFRS 9)  | 
            Hedging instruments: hedging costs (IFRS 9)  | 
            Investments accounted for using the equity method  | 
            Taxes  | 
            
  | 
            
  | 
            
  | 
        |
Balance at January 1, 2019  | 
            4,761,459  | 
            12,189  | 
            (49)  | 
            54,646  | 
            (37,392)  | 
            2,166  | 
            
  | 
            (1,120)  | 
            (28)  | 
            84  | 
            2  | 
            519  | 
            58  | 
            (4)  | 
            (165)  | 
            30,907  | 
            12,530  | 
            43,437  | 
            
  | 
        
Changes in accounting standards  | 
            
  | 
            
  | 
            
  | 
            
  | 
            221  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            221  | 
            125  | 
            346  | 
            
  | 
        
Changes in the composition of the Group  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            0  | 
            239  | 
            239  | 
            
  | 
        
Transactions with owners  | 
            
  | 
            
  | 
            
  | 
            77  | 
            
  | 
            
  | 
            
  | 
            (7)  | 
            
  | 
            
  | 
            
  | 
            4  | 
            
  | 
            
  | 
            (1)  | 
            73  | 
            340  | 
            413  | 
            
  | 
        
Unappropriated profit (loss) carried forward  | 
            
  | 
            
  | 
            
  | 
            
  | 
            2,166  | 
            (2,166)  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            0  | 
            0  | 
            0  | 
            
  | 
        
Dividends  | 
            
  | 
            
  | 
            
  | 
            
  | 
            (3,320)  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            (3,320)  | 
            (236)  | 
            (3,555)  | 
            
  | 
        
Capital increase at Deutsche Telekom AG  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            0  | 
            0  | 
            0  | 
            
  | 
        
Capital increase from share-based payment  | 
            
  | 
            
  | 
            
  | 
            306  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            306  | 
            178  | 
            484  | 
            
  | 
        
Share buy-back/shares held in a trust deposit  | 
            
  | 
            
  | 
            1  | 
            
  | 
            4  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            5  | 
            0  | 
            5  | 
            
  | 
        
Profit (loss)  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            3,867  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            3,867  | 
            1,401  | 
            5,268  | 
            
  | 
        
Other comprehensive income  | 
            
  | 
            
  | 
            
  | 
            
  | 
            (463)  | 
            
  | 
            
  | 
            319  | 
            
  | 
            99  | 
            (9)  | 
            (393)  | 
            (7)  | 
            4  | 
            97  | 
            (353)  | 
            (54)  | 
            (407)  | 
            
  | 
        
Total comprehensive income  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            3,514  | 
            1,347  | 
            4,861  | 
            
  | 
        
Transfer to retained earnings  | 
            
  | 
            
  | 
            
  | 
            
  | 
            74  | 
            
  | 
            
  | 
            
  | 
            7  | 
            (82)  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            0  | 
            0  | 
            0  | 
            
  | 
        
Balance at December 31, 2019  | 
            4,761,459  | 
            12,189  | 
            (47)  | 
            55,029  | 
            (38,709)  | 
            3,867  | 
            
  | 
            (808)  | 
            (21)  | 
            101  | 
            (6)  | 
            130  | 
            51  | 
            0  | 
            (69)  | 
            31,707  | 
            14,524  | 
            46,231  | 
            
  | 
        
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
        
Balance at January 1, 2020  | 
            4,761,459  | 
            12,189  | 
            (47)  | 
            55,029  | 
            (38,709)  | 
            3,867  | 
            
  | 
            (808)  | 
            (21)  | 
            101  | 
            (6)  | 
            130  | 
            51  | 
            0  | 
            (69)  | 
            31,707  | 
            14,524  | 
            46,231  | 
            
  | 
        
Changes in accounting standards  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            0  | 
            0  | 
            0  | 
            
  | 
        
Changes in the composition of the Group  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            0  | 
            17,329  | 
            17,329  | 
            
  | 
        
Transactions with owners  | 
            
  | 
            
  | 
            
  | 
            7,356  | 
            
  | 
            
  | 
            
  | 
            (339)  | 
            
  | 
            0  | 
            12  | 
            380  | 
            
  | 
            
  | 
            (109)  | 
            7,299  | 
            5,967  | 
            13,266  | 
            
  | 
        
Unappropriated profit (loss) carried forward  | 
            
  | 
            
  | 
            
  | 
            
  | 
            3,867  | 
            (3,867)  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            0  | 
            0  | 
            0  | 
            
  | 
        
Dividends  | 
            
  | 
            
  | 
            
  | 
            
  | 
            (2,846)  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            (2,846)  | 
            (215)  | 
            (3,061)  | 
            
  | 
        
Capital increase at Deutsche Telekom AG  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            0  | 
            0  | 
            0  | 
            
  | 
        
Capital increase from share-based payment  | 
            
  | 
            
  | 
            
  | 
            256  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            256  | 
            262  | 
            517  | 
            
  | 
        
Share buy-back/shares held in a trust deposit  | 
            
  | 
            
  | 
            1  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            1  | 
            0  | 
            1  | 
            
  | 
        
Profit (loss)  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            4,158  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            4,158  | 
            2,589  | 
            6,747  | 
            
  | 
        
Other comprehensive income  | 
            
  | 
            
  | 
            
  | 
            
  | 
            (1,218)  | 
            
  | 
            
  | 
            (2,945)  | 
            
  | 
            62  | 
            (6)  | 
            (733)  | 
            (27)  | 
            1  | 
            213  | 
            (4,654)  | 
            (3,827)  | 
            (8,481)  | 
            
  | 
        
Total comprehensive income  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            (496)  | 
            (1,238)  | 
            (1,734)  | 
            
  | 
        
Transfer to retained earnings  | 
            
  | 
            
  | 
            
  | 
            
  | 
            1  | 
            
  | 
            
  | 
            
  | 
            7  | 
            (7)  | 
            
  | 
            0  | 
            
  | 
            (1)  | 
            
  | 
            0  | 
            0  | 
            0  | 
            
  | 
        
Balance at December 31, 2020  | 
            4,761,459  | 
            12,189  | 
            (46)  | 
            62,640  | 
            (38,905)  | 
            4,158  | 
            
  | 
            (4,092)  | 
            (14)  | 
            156  | 
            0  | 
            (223)  | 
            24  | 
            0  | 
            34  | 
            35,922  | 
            36,628  | 
            72,550  | 
            
  | 
        
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
        
Balance at January 1, 2021  | 
            4,761,459  | 
            12,189  | 
            (46)  | 
            62,640  | 
            (38,905)  | 
            4,158  | 
            
  | 
            (4,092)  | 
            (14)  | 
            156  | 
            0  | 
            (223)  | 
            24  | 
            0  | 
            34  | 
            35,922  | 
            36,628  | 
            72,550  | 
            
  | 
        
Changes in accounting standards  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            0  | 
            0  | 
            0  | 
            
  | 
        
Changes in the composition of the Group  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            0  | 
            (181)  | 
            (181)  | 
            
  | 
        
Transactions with owners  | 
            
  | 
            
  | 
            
  | 
            (183)  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            5  | 
            
  | 
            
  | 
            (1)  | 
            (179)  | 
            (48)  | 
            (227)  | 
            
  | 
        
Unappropriated profit (loss) carried forward  | 
            
  | 
            
  | 
            
  | 
            
  | 
            4,158  | 
            (4,158)  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            0  | 
            0  | 
            0  | 
            
  | 
        
Dividends  | 
            
  | 
            
  | 
            
  | 
            
  | 
            (2,846)  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            (2,846)  | 
            (292)  | 
            (3,138)  | 
            
  | 
        
Capital increase at Deutsche Telekom AG  | 
            225,000  | 
            576  | 
            
  | 
            1,063  | 
            
  | 
            
  | 
            
  | 
            (83)  | 
            
  | 
            
  | 
            
  | 
            (64)  | 
            
  | 
            
  | 
            19  | 
            1,511  | 
            (2,358)  | 
            (847)  | 
            
  | 
        
Capital increase from share-based payment  | 
            
  | 
            
  | 
            
  | 
            253  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            253  | 
            252  | 
            505  | 
            
  | 
        
Share buy-back/shares held in a trust deposit  | 
            
  | 
            
  | 
            9  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            9  | 
            0  | 
            9  | 
            
  | 
        
Profit (loss)  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            4,176  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            4,176  | 
            1,927  | 
            6,103  | 
            
  | 
        
Other comprehensive income  | 
            
  | 
            
  | 
            
  | 
            
  | 
            1,125  | 
            
  | 
            
  | 
            2,427  | 
            
  | 
            107  | 
            (37)  | 
            227  | 
            62  | 
            
  | 
            (77)  | 
            3,833  | 
            2,861  | 
            6,694  | 
            
  | 
        
Total comprehensive income  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            8,010  | 
            4,788  | 
            12,798  | 
            
  | 
        
Transfer to retained earnings  | 
            
  | 
            
  | 
            
  | 
            
  | 
            110  | 
            
  | 
            
  | 
            
  | 
            6  | 
            (120)  | 
            0  | 
            
  | 
            
  | 
            
  | 
            3  | 
            0  | 
            0  | 
            0  | 
            
  | 
        
Balance at December 31, 2021  | 
            4,986,459  | 
            12,765  | 
            (37)  | 
            63,773  | 
            (36,358)  | 
            4,176  | 
            
  | 
            (1,747)  | 
            (7)  | 
            143  | 
            (37)  | 
            (56)  | 
            86  | 
            0  | 
            (22)  | 
            42,679  | 
            38,790  | 
            81,469  | 
            
  | 
        
millions of €  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
        
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
  | 
            Issued capital and reserves attributable to owners of the parent  | 
            Issued capital and reserves attributable to owners of the parent  | 
            Total  | 
            Non-controlling interests  | 
            Total shareholders’ equity  | 
            
  | 
        |||||||||||||
  | 
            Equity contributed  | 
            Consolidated shareholders’ equity generated  | 
            
  | 
            Total other comprehensive income  | 
            
  | 
            
  | 
            
  | 
        ||||||||||||
  | 
            Number of shares thousands  | 
            Issued capital  | 
            Treasury shares  | 
            Capital reserves  | 
            Retained earnings including carryforwards  | 
            Net profit (loss)  | 
            
  | 
            Translation of foreign operations  | 
            Revaluation surplus  | 
            Equity instruments measured at fair value through other comprehensive income (IFRS 9)  | 
            Debt instruments measured at fair value through other comprehensive income (IFRS 9)  | 
            Hedging instruments: designated risk components (IFRS 9)  | 
            Hedging instruments: hedging costs (IFRS 9)  | 
            Investments accounted for using the equity method  | 
            Taxes  | 
            
  | 
            
  | 
            
  | 
        |
Balance at January 1, 2019  | 
            4,761,459  | 
            12,189  | 
            (49)  | 
            54,646  | 
            (37,392)  | 
            2,166  | 
            
  | 
            (1,120)  | 
            (28)  | 
            84  | 
            2  | 
            519  | 
            58  | 
            (4)  | 
            (165)  | 
            30,907  | 
            12,530  | 
            43,437  | 
            
  | 
        
Changes in accounting standards  | 
            
  | 
            
  | 
            
  | 
            
  | 
            221  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            221  | 
            125  | 
            346  | 
            
  | 
        
Changes in the composition of the Group  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            0  | 
            239  | 
            239  | 
            
  | 
        
Transactions with owners  | 
            
  | 
            
  | 
            
  | 
            77  | 
            
  | 
            
  | 
            
  | 
            (7)  | 
            
  | 
            
  | 
            
  | 
            4  | 
            
  | 
            
  | 
            (1)  | 
            73  | 
            340  | 
            413  | 
            
  | 
        
Unappropriated profit (loss) carried forward  | 
            
  | 
            
  | 
            
  | 
            
  | 
            2,166  | 
            (2,166)  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            0  | 
            0  | 
            0  | 
            
  | 
        
Dividends  | 
            
  | 
            
  | 
            
  | 
            
  | 
            (3,320)  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            (3,320)  | 
            (236)  | 
            (3,555)  | 
            
  | 
        
Capital increase at Deutsche Telekom AG  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            0  | 
            0  | 
            0  | 
            
  | 
        
Capital increase from share-based payment  | 
            
  | 
            
  | 
            
  | 
            306  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            306  | 
            178  | 
            484  | 
            
  | 
        
Share buy-back/shares held in a trust deposit  | 
            
  | 
            
  | 
            1  | 
            
  | 
            4  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            5  | 
            0  | 
            5  | 
            
  | 
        
Profit (loss)  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            3,867  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            3,867  | 
            1,401  | 
            5,268  | 
            
  | 
        
Other comprehensive income  | 
            
  | 
            
  | 
            
  | 
            
  | 
            (463)  | 
            
  | 
            
  | 
            319  | 
            
  | 
            99  | 
            (9)  | 
            (393)  | 
            (7)  | 
            4  | 
            97  | 
            (353)  | 
            (54)  | 
            (407)  | 
            
  | 
        
Total comprehensive income  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            3,514  | 
            1,347  | 
            4,861  | 
            
  | 
        
Transfer to retained earnings  | 
            
  | 
            
  | 
            
  | 
            
  | 
            74  | 
            
  | 
            
  | 
            
  | 
            7  | 
            (82)  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            0  | 
            0  | 
            0  | 
            
  | 
        
Balance at December 31, 2019  | 
            4,761,459  | 
            12,189  | 
            (47)  | 
            55,029  | 
            (38,709)  | 
            3,867  | 
            
  | 
            (808)  | 
            (21)  | 
            101  | 
            (6)  | 
            130  | 
            51  | 
            0  | 
            (69)  | 
            31,707  | 
            14,524  | 
            46,231  | 
            
  | 
        
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
        
Balance at January 1, 2020  | 
            4,761,459  | 
            12,189  | 
            (47)  | 
            55,029  | 
            (38,709)  | 
            3,867  | 
            
  | 
            (808)  | 
            (21)  | 
            101  | 
            (6)  | 
            130  | 
            51  | 
            0  | 
            (69)  | 
            31,707  | 
            14,524  | 
            46,231  | 
            
  | 
        
Changes in accounting standards  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            0  | 
            0  | 
            0  | 
            
  | 
        
Changes in the composition of the Group  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            0  | 
            17,329  | 
            17,329  | 
            
  | 
        
Transactions with owners  | 
            
  | 
            
  | 
            
  | 
            7,356  | 
            
  | 
            
  | 
            
  | 
            (339)  | 
            
  | 
            0  | 
            12  | 
            380  | 
            
  | 
            
  | 
            (109)  | 
            7,299  | 
            5,967  | 
            13,266  | 
            
  | 
        
Unappropriated profit (loss) carried forward  | 
            
  | 
            
  | 
            
  | 
            
  | 
            3,867  | 
            (3,867)  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            0  | 
            0  | 
            0  | 
            
  | 
        
Dividends  | 
            
  | 
            
  | 
            
  | 
            
  | 
            (2,846)  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            (2,846)  | 
            (215)  | 
            (3,061)  | 
            
  | 
        
Capital increase at Deutsche Telekom AG  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            0  | 
            0  | 
            0  | 
            
  | 
        
Capital increase from share-based payment  | 
            
  | 
            
  | 
            
  | 
            256  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            256  | 
            262  | 
            517  | 
            
  | 
        
Share buy-back/shares held in a trust deposit  | 
            
  | 
            
  | 
            1  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            1  | 
            0  | 
            1  | 
            
  | 
        
Profit (loss)  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            4,158  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            4,158  | 
            2,589  | 
            6,747  | 
            
  | 
        
Other comprehensive income  | 
            
  | 
            
  | 
            
  | 
            
  | 
            (1,218)  | 
            
  | 
            
  | 
            (2,945)  | 
            
  | 
            62  | 
            (6)  | 
            (733)  | 
            (27)  | 
            1  | 
            213  | 
            (4,654)  | 
            (3,827)  | 
            (8,481)  | 
            
  | 
        
Total comprehensive income  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            (496)  | 
            (1,238)  | 
            (1,734)  | 
            
  | 
        
Transfer to retained earnings  | 
            
  | 
            
  | 
            
  | 
            
  | 
            1  | 
            
  | 
            
  | 
            
  | 
            7  | 
            (7)  | 
            
  | 
            0  | 
            
  | 
            (1)  | 
            
  | 
            0  | 
            0  | 
            0  | 
            
  | 
        
Balance at December 31, 2020  | 
            4,761,459  | 
            12,189  | 
            (46)  | 
            62,640  | 
            (38,905)  | 
            4,158  | 
            
  | 
            (4,092)  | 
            (14)  | 
            156  | 
            0  | 
            (223)  | 
            24  | 
            0  | 
            34  | 
            35,922  | 
            36,628  | 
            72,550  | 
            
  | 
        
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
        
Balance at January 1, 2021  | 
            4,761,459  | 
            12,189  | 
            (46)  | 
            62,640  | 
            (38,905)  | 
            4,158  | 
            
  | 
            (4,092)  | 
            (14)  | 
            156  | 
            0  | 
            (223)  | 
            24  | 
            0  | 
            34  | 
            35,922  | 
            36,628  | 
            72,550  | 
            
  | 
        
Changes in accounting standards  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            0  | 
            0  | 
            0  | 
            
  | 
        
Changes in the composition of the Group  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            0  | 
            (181)  | 
            (181)  | 
            
  | 
        
Transactions with owners  | 
            
  | 
            
  | 
            
  | 
            (183)  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            5  | 
            
  | 
            
  | 
            (1)  | 
            (179)  | 
            (48)  | 
            (227)  | 
            
  | 
        
Unappropriated profit (loss) carried forward  | 
            
  | 
            
  | 
            
  | 
            
  | 
            4,158  | 
            (4,158)  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            0  | 
            0  | 
            0  | 
            
  | 
        
Dividends  | 
            
  | 
            
  | 
            
  | 
            
  | 
            (2,846)  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            (2,846)  | 
            (292)  | 
            (3,138)  | 
            
  | 
        
Capital increase at Deutsche Telekom AG  | 
            225,000  | 
            576  | 
            
  | 
            1,063  | 
            
  | 
            
  | 
            
  | 
            (83)  | 
            
  | 
            
  | 
            
  | 
            (64)  | 
            
  | 
            
  | 
            19  | 
            1,511  | 
            (2,358)  | 
            (847)  | 
            
  | 
        
Capital increase from share-based payment  | 
            
  | 
            
  | 
            
  | 
            253  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            253  | 
            252  | 
            505  | 
            
  | 
        
Share buy-back/shares held in a trust deposit  | 
            
  | 
            
  | 
            9  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            9  | 
            0  | 
            9  | 
            
  | 
        
Profit (loss)  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            4,176  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            4,176  | 
            1,927  | 
            6,103  | 
            
  | 
        
Other comprehensive income  | 
            
  | 
            
  | 
            
  | 
            
  | 
            1,125  | 
            
  | 
            
  | 
            2,427  | 
            
  | 
            107  | 
            (37)  | 
            227  | 
            62  | 
            
  | 
            (77)  | 
            3,833  | 
            2,861  | 
            6,694  | 
            
  | 
        
Total comprehensive income  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            
  | 
            8,010  | 
            4,788  | 
            12,798  | 
            
  | 
        
Transfer to retained earnings  | 
            
  | 
            
  | 
            
  | 
            
  | 
            110  | 
            
  | 
            
  | 
            
  | 
            6  | 
            (120)  | 
            0  | 
            
  | 
            
  | 
            
  | 
            3  | 
            0  | 
            0  | 
            0  | 
            
  | 
        
Balance at December 31, 2021  | 
            4,986,459  | 
            12,765  | 
            (37)  | 
            63,773  | 
            (36,358)  | 
            4,176  | 
            
  | 
            (1,747)  | 
            (7)  | 
            143  | 
            (37)  | 
            (56)  | 
            86  | 
            0  | 
            (22)  | 
            42,679  | 
            38,790  | 
            81,469  | 
            
  |