v3.22.0.1
Goodwill, Spectrum License Transactions and Other Intangible Assets - Other Intangible Assets (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]    
Gross Amount $ 6,925 $ 6,665
Accumulated Amortization (2,192) (1,367)
Net Amount 4,733 5,298
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]    
2022 1,072  
2023 917  
2024 760  
2025 601  
2026 440  
Thereafter 943  
Net Amount 4,733 5,298
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount 4,879 4,900
Accumulated Amortization (1,863) (865)
Net Amount 3,016 4,035
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]    
Net Amount $ 3,016 4,035
Customer relationships | Maximum    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, useful life 8 years  
Reacquired rights    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount $ 770 0
Accumulated Amortization (46) 0
Net Amount 724 0
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]    
Net Amount $ 724 0
Reacquired rights | Maximum    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, useful life 9 years  
Tradenames and patents    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount $ 171 598
Accumulated Amortization (91) (412)
Net Amount 80 186
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]    
Net Amount $ 80 186
Tradenames and patents | Maximum    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, useful life 19 years  
Favorable spectrum leases    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount $ 728 790
Accumulated Amortization (74) (35)
Net Amount 654 755
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]    
Net Amount $ 654 755
Favorable spectrum leases | Maximum    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, useful life 27 years  
Other    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount $ 377 377
Accumulated Amortization (118) (55)
Net Amount 259 322
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]    
Net Amount $ 259 $ 322
Other | Maximum    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, useful life 10 years