v3.20.2
Leases - Leased Wireless Devices (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2020
Apr. 01, 2020
Dec. 31, 2019
Property, Plant and Equipment [Line Items]      
Accumulated depreciation $ (37,089)   $ (33,118)
Property and equipment, net $ 38,801   21,984
Leased wireless devices      
Property, Plant and Equipment [Line Items]      
Useful life (in years) 12 months    
Property, plant and equipment $ 7,605   1,139
Accumulated depreciation (984)   (407)
Property and equipment, net $ 6,621   $ 732
Leased wireless devices | Sprint      
Property, Plant and Equipment [Line Items]      
Property and equipment, net   $ 5,800