v3.20.2
Debt - Commitment Letter and Senior Secured Notes (Details)
3 Months Ended 6 Months Ended
Apr. 09, 2020
USD ($)
Apr. 01, 2020
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Jun. 30, 2018
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Jun. 24, 2020
USD ($)
Mar. 31, 2018
USD ($)
Debt Instrument [Line Items]                  
Principal Issuances     $ 46,000,000,000     $ 46,000,000,000      
Payments of consent fees     $ 109,000,000 $ 0   109,000,000 $ 0    
Net Proceeds from Issuance of Long-Term Debt           $ 45,433,000,000      
Senior Notes                  
Debt Instrument [Line Items]                  
Principal Issuances $ 19,000,000,000.0             $ 4,000,000,000.0  
Net Proceeds from Issuance of Long-Term Debt $ 18,800,000,000                
Senior Notes | Sprint                  
Debt Instrument [Line Items]                  
Principal Issuances                 $ 3,900,000,000
5.300% Senior Notes due 2021 | Senior Notes | Affiliates                  
Debt Instrument [Line Items]                  
Interest rate, stated percentage     5.30%     5.30%      
Guaranteed Notes due 2028 | Sprint                  
Debt Instrument [Line Items]                  
Interest rate, stated percentage   7.25%              
Principal amount outstanding   $ 1,000,000,000.0              
3.500% Senior Secured Notes due 2025 | Senior Notes                  
Debt Instrument [Line Items]                  
Principal Issuances     $ 3,000,000,000     $ 3,000,000,000      
Interest rate, stated percentage 3.50%                
Net Proceeds from Issuance of Long-Term Debt           2,988,000,000      
3.750% Senior Secured Notes due 2027 | Senior Notes                  
Debt Instrument [Line Items]                  
Principal Issuances     $ 4,000,000,000     $ 4,000,000,000      
Interest rate, stated percentage     3.75%     3.75%      
Net Proceeds from Issuance of Long-Term Debt           $ 3,983,000,000      
3.875% Senior Secured Notes due 2030 | Senior Notes                  
Debt Instrument [Line Items]                  
Principal Issuances     $ 7,000,000,000     $ 7,000,000,000      
Interest rate, stated percentage     3.875%     3.875%      
Net Proceeds from Issuance of Long-Term Debt           $ 6,922,000,000      
4.375% Senior Secured Notes due 2040 | Senior Notes                  
Debt Instrument [Line Items]                  
Principal Issuances     $ 2,000,000,000     $ 2,000,000,000      
Interest rate, stated percentage     4.375%     4.375%      
Net Proceeds from Issuance of Long-Term Debt           $ 1,953,000,000      
4.500% Senior Secured Notes due 2050 | Senior Notes                  
Debt Instrument [Line Items]                  
Principal Issuances     $ 3,000,000,000     3,000,000,000      
Interest rate, stated percentage 4.50%                
Net Proceeds from Issuance of Long-Term Debt           2,976,000,000      
1.500% Senior Secured Notes due 2026 | Senior Notes                  
Debt Instrument [Line Items]                  
Principal Issuances     $ 1,000,000,000     $ 1,000,000,000      
Interest rate, stated percentage     1.50%     1.50%      
Net Proceeds from Issuance of Long-Term Debt           $ 995,000,000      
2.550% Senior Secured Notes due 2031 | Senior Notes                  
Debt Instrument [Line Items]                  
Principal Issuances     $ 1,750,000,000     $ 1,750,000,000      
Interest rate, stated percentage     2.55%     2.55%      
Net Proceeds from Issuance of Long-Term Debt           $ 1,738,000,000      
Sprint                  
Debt Instrument [Line Items]                  
Principal Issuances     $ 26,649,000,000     26,649,000,000      
Sprint | DT                  
Debt Instrument [Line Items]                  
Payments of consent fees         $ 7,000,000        
Sprint | DT | Senior Notes | Affiliates                  
Debt Instrument [Line Items]                  
Indebtedness to affiliates   4,000,000,000.0              
Sprint | Secured Debt Financing                  
Debt Instrument [Line Items]                  
Financing commitment, amount   27,000,000,000.0              
Proceeds from Lines of Credit   22,600,000,000              
Sprint | Secured Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Financing commitment, amount   $ 4,000,000,000.0              
Sprint | Secured Revolving Credit Facility | LIBOR | Maximum                  
Debt Instrument [Line Items]                  
Variable rate   1.25%              
Sprint | Secured Revolving Credit Facility | LIBOR | Minimum                  
Debt Instrument [Line Items]                  
Variable rate   1.00%              
Sprint | Secured Term Loan Facility                  
Debt Instrument [Line Items]                  
Financing commitment, amount   $ 4,000,000,000.0              
Net leverage ratio   0.75              
Sprint | Secured Term Loan Facility | DT                  
Debt Instrument [Line Items]                  
Repayment of debt   $ 4,000,000,000.0              
Sprint | Secured Term Loan Facility | LIBOR                  
Debt Instrument [Line Items]                  
Variable rate   3.00%              
Sprint | Secured bridge loan facility due 2021                  
Debt Instrument [Line Items]                  
Financing commitment, amount   $ 19,000,000,000.0              
Sprint | Secured bridge loan facility due 2021 | LIBOR                  
Debt Instrument [Line Items]                  
Variable rate   1.25%              
Sprint | New Credit Agreement                  
Debt Instrument [Line Items]                  
Financial maintenance covenant   3.3              
Sprint | 5.300% Senior Notes due 2021 | DT | Senior Notes                  
Debt Instrument [Line Items]                  
Principal Issuances   $ 2,000,000,000.0              
Interest rate, stated percentage   5.30%              
Sprint | 6.000% Senior Notes due 2024 | DT | Senior Notes                  
Debt Instrument [Line Items]                  
Principal Issuances   $ 2,000,000,000.0              
Interest rate, stated percentage   6.00%              
Sprint | Secured Term Loan due 2024                  
Debt Instrument [Line Items]                  
Principal amount outstanding   $ 5,900,000,000              
Sprint | Accounts receivable facility                  
Debt Instrument [Line Items]                  
Principal Issuances     $ 0     $ 0      
Total amount outstanding   2,300,000,000              
Sprint | Secured and Unsecured Debt Financing                  
Debt Instrument [Line Items]                  
Payments of consent fees   $ 355,000,000