v3.22.0.1
Property and Equipment (Tables)
 12 Months Ended
Dec. 31, 2021
Property, Plant and Equipment [Abstract]  
Schedule of Property and Equipment The components of property and equipment were as follows:
(in millions)Useful LivesDecember 31,
2021		December 31,
2020
Land$225 $236 
Buildings and equipment
Up to 30 years
4,344 4,006 
Wireless communications systems
Up to 20 years
57,114 49,453 
Leasehold improvements
Up to 10 years
2,160 1,879 
Capitalized software
Up to 10 years
18,243 16,412 
Leased wireless devices
Up to 19 months
3,832 6,989 
Construction in progressN/A3,703 4,595 
Accumulated depreciation and amortization(49,818)(42,395)
Property and equipment, net$39,803 $41,175 
Schedule of Asset Retirement Obligations Activity in our asset retirement obligations was as follows:
(in millions)Year Ended December 31, 2021Year Ended December 31, 2020
Asset retirement obligations, beginning of year$1,817 $659 
Fair value of liabilities acquired through Merger— 1,110 
Liabilities incurred54 16 
Liabilities settled(173)(40)
Accretion expense62 55 
Changes in estimated cash flows139 17 
Asset retirement obligations, end of period$1,899 $1,817 
Classified on the consolidated balance sheets as:
Other current liabilities$216 $14 
Other long-term liabilities1,683 1,803