v3.22.0.1
Leases - Leased Wireless Devices (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Property, Plant and Equipment [Line Items]    
Accumulated depreciation $ (49,818) $ (42,395)
Property and equipment, net $ 39,803 41,175
Assets Leased To Others    
Property, Plant and Equipment [Line Items]    
Average Remaining Useful Life 8 months  
Leased wireless devices, gross $ 3,832 6,989
Accumulated depreciation (2,373) (2,170)
Property and equipment, net $ 1,459 $ 4,819