v3.20.4
Debt - Schedule of Debt (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Oct. 28, 2020
Jul. 04, 2020
Apr. 01, 2020
Dec. 31, 2019
Debt Instrument [Line Items]          
Unamortized premium $ 2,197       $ 0
Unamortized discount (197)       0
Debt issuance costs and consent fees (244)       (46)
Long-term debt 71,125       24,969
Less: Current portion of Senior Notes and other debt to third parties 4,579       25
Total long-term debt 66,546       24,944
Long-term debt 61,830       10,958
Long-term debt to affiliates 4,716       13,986
Affiliates          
Debt Instrument [Line Items]          
Unamortized premium 0       43
Unamortized discount (20)       (53)
Senior Secured Series 2016-1 A-1 Notes due 2021, 3.360%          
Debt Instrument [Line Items]          
Long-term debt $ 656       0
5.300% Senior Notes due 2021 | Affiliates          
Debt Instrument [Line Items]          
Interest rate, stated percentage 5.30%        
Long-term debt $ 0       2,000
Senior Notes due 2021, 7.250%          
Debt Instrument [Line Items]          
Long-term debt 2,250       0
Senior Notes due 2021, 11.500%          
Debt Instrument [Line Items]          
Long-term debt $ 1,000       0
4.000% Senior Notes due 2022          
Debt Instrument [Line Items]          
Interest rate, stated percentage 4.00%        
Long-term debt $ 500       500
4.000% Senior Notes due 2022 | Affiliates          
Debt Instrument [Line Items]          
Interest rate, stated percentage 4.00%        
Long-term debt $ 1,000       1,000
Senior Notes due 2022, 6.000%          
Debt Instrument [Line Items]          
Long-term debt 2,280       0
Incremental term loan facility to affiliates due 2022 | Affiliates          
Debt Instrument [Line Items]          
Long-term debt $ 0       2,000
6.000% Senior Notes due 2023          
Debt Instrument [Line Items]          
Interest rate, stated percentage 6.00%        
Long-term debt $ 1,300       1,300
Senior Notes due 2023, 7.875%          
Debt Instrument [Line Items]          
Long-term debt $ 4,250       0
6.000% Senior Notes due 2024 [$1.0B]          
Debt Instrument [Line Items]          
Interest rate, stated percentage 6.00%        
Long-term debt $ 1,000       1,000
6.000% Senior Notes due 2024 [$1.35B] | Affiliates          
Debt Instrument [Line Items]          
Interest rate, stated percentage 6.00%        
Long-term debt $ 0       1,350
6.000% Senior Notes due 2024 [$650M] | Affiliates          
Debt Instrument [Line Items]          
Interest rate, stated percentage 6.00%        
Long-term debt $ 0       650
6.500% Senior Notes due 2024          
Debt Instrument [Line Items]          
Interest rate, stated percentage 6.50%        
Long-term debt $ 0       1,000
Senior Notes due 2024, 7.125%          
Debt Instrument [Line Items]          
Long-term debt 2,500       0
Incremental term loan facility to affiliates due 2024 | Affiliates          
Debt Instrument [Line Items]          
Long-term debt $ 0       2,000
3.500% Senior Secured Notes due 2025          
Debt Instrument [Line Items]          
Interest rate, stated percentage 3.50%        
Long-term debt $ 3,000       0
Senior Secured Series 2018-1 A-1 Notes due 2025, 4.738%          
Debt Instrument [Line Items]          
Long-term debt $ 2,100       0
5.125% Senior Notes Due 2025          
Debt Instrument [Line Items]          
Interest rate, stated percentage 5.125%        
Long-term debt $ 500       500
5.125% Senior Notes Due 2025 | Affiliates          
Debt Instrument [Line Items]          
Interest rate, stated percentage     5.125%    
Long-term debt $ 0       1,250
6.375% Senior Notes due 2025          
Debt Instrument [Line Items]          
Interest rate, stated percentage 6.375%        
Long-term debt $ 0       1,700
Senior Notes due 2025, 7.625%          
Debt Instrument [Line Items]          
Long-term debt $ 1,500       0
1.500% Senior Secured Notes due 2026          
Debt Instrument [Line Items]          
Interest rate, stated percentage 1.50%        
Long-term debt $ 1,000       0
6.500% Senior Notes due 2026          
Debt Instrument [Line Items]          
Interest rate, stated percentage 6.50%        
Long-term debt $ 2,000       2,000
Senior Notes due 2026, 4.500%          
Debt Instrument [Line Items]          
Interest rate, stated percentage 4.50%        
Long-term debt $ 1,000       1,000
Senior Notes due 2026, 4.500% | Affiliates          
Debt Instrument [Line Items]          
Interest rate, stated percentage 4.50%        
Long-term debt $ 1,000       1,000
Senior Notes due 2026, 7.625%          
Debt Instrument [Line Items]          
Long-term debt $ 1,500       0
3.750% Senior Secured Notes due 2027          
Debt Instrument [Line Items]          
Interest rate, stated percentage 3.75%        
Long-term debt $ 4,000       0
5.375% Senior Notes Due 2027          
Debt Instrument [Line Items]          
Interest rate, stated percentage 5.375%        
Long-term debt $ 500       500
5.375% Senior Notes Due 2027 | Affiliates          
Debt Instrument [Line Items]          
Interest rate, stated percentage 5.375%        
Long-term debt $ 1,250       1,250
2.050% Senior Secured Notes due 2028          
Debt Instrument [Line Items]          
Interest rate, stated percentage 2.05%        
Long-term debt $ 1,750       0
Senior Notes due 2028, 4.750%          
Debt Instrument [Line Items]          
Interest rate, stated percentage 4.75%        
Long-term debt $ 1,500       1,500
Senior Notes due 2028, 4.750% | Affiliates          
Debt Instrument [Line Items]          
Interest rate, stated percentage 4.75%        
Long-term debt $ 1,500       1,500
Senior Secured Series 2018-1 A-2 Notes due 2028, 5.152%          
Debt Instrument [Line Items]          
Long-term debt 1,838       0
Senior Notes due 2028, 6.875%          
Debt Instrument [Line Items]          
Long-term debt $ 2,475       0
3.875% Senior Secured Notes due 2030          
Debt Instrument [Line Items]          
Interest rate, stated percentage 3.875%        
Long-term debt $ 7,000       0
2.250% Senior Secured Notes due 2031          
Debt Instrument [Line Items]          
Interest rate, stated percentage 2.25% 2.25%      
Long-term debt $ 1,000       0
2.550% Senior Secured Notes due 2031          
Debt Instrument [Line Items]          
Interest rate, stated percentage 2.55%        
Long-term debt $ 2,500       0
Senior Notes due 2032, 8.750%          
Debt Instrument [Line Items]          
Long-term debt $ 2,000       0
4.375% Senior Secured Notes due 2040          
Debt Instrument [Line Items]          
Interest rate, stated percentage 4.375%        
Long-term debt $ 2,000       0
3.000% Senior Secured Notes due 2041          
Debt Instrument [Line Items]          
Interest rate, stated percentage 3.00%        
Long-term debt $ 2,500       0
4.500% Senior Secured Notes due 2050          
Debt Instrument [Line Items]          
Interest rate, stated percentage 4.50%        
Long-term debt $ 3,000       0
3.300% Senior Secured Notes due 2051          
Debt Instrument [Line Items]          
Interest rate, stated percentage 3.30%        
Long-term debt $ 3,000       0
3.600% Senior Secured Notes due 2060          
Debt Instrument [Line Items]          
Interest rate, stated percentage 3.60%        
Long-term debt $ 1,000       0
Other Debt Obligations          
Debt Instrument [Line Items]          
Long-term debt 240       $ 25
Sprint          
Debt Instrument [Line Items]          
Long-term debt $ 26,740        
Sprint | Senior Secured Series 2016-1 A-1 Notes due 2021, 3.360%          
Debt Instrument [Line Items]          
Interest rate, stated percentage       3.36%  
Sprint | Senior Notes due 2021, 7.250%          
Debt Instrument [Line Items]          
Interest rate, stated percentage       7.25%  
Sprint | Senior Notes due 2021, 11.500%          
Debt Instrument [Line Items]          
Interest rate, stated percentage 11.50%        
Sprint | Senior Notes due 2022, 6.000%          
Debt Instrument [Line Items]          
Interest rate, stated percentage       6.00%  
Sprint | Senior Notes due 2023, 7.875%          
Debt Instrument [Line Items]          
Interest rate, stated percentage       7.875%  
Sprint | Senior Notes due 2024, 7.125%          
Debt Instrument [Line Items]          
Interest rate, stated percentage       7.125%  
Sprint | Senior Secured Series 2018-1 A-1 Notes due 2025, 4.738%          
Debt Instrument [Line Items]          
Interest rate, stated percentage       4.738%  
Sprint | Senior Notes due 2025, 7.625%          
Debt Instrument [Line Items]          
Interest rate, stated percentage       7.625%  
Sprint | Senior Notes due 2026, 7.625%          
Debt Instrument [Line Items]          
Interest rate, stated percentage       7.625%  
Sprint | Senior Secured Series 2018-1 A-2 Notes due 2028, 5.152%          
Debt Instrument [Line Items]          
Interest rate, stated percentage       5.152%  
Sprint | Senior Notes due 2028, 6.875%          
Debt Instrument [Line Items]          
Interest rate, stated percentage       6.875%  
Sprint | Senior Notes due 2032, 8.750%          
Debt Instrument [Line Items]          
Interest rate, stated percentage       8.75%