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Property, Plant and Equipment (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Property, Plant and Equipment [Line Items] |  |  |
Land | $ 63 | $ 62 |
Buildings | 532 | 541 |
Leasehold and land improvements | 1,538 | 1,476 |
Cable and wire | 2,609 | 2,403 |
Network and switching equipment | 2,706 | 2,671 |
Cell site equipment | 4,248 | 4,150 |
Office furniture and equipment | 296 | 346 |
Other operating assets and equipment | 200 | 176 |
System development | 2,070 | 1,864 |
Work in process | 709 | 576 |
Total property, plant and equipment, gross | 14,971 | 14,265 |
Accumulated depreciation and amortization | (10,211) | (9,904) |
Property, plant and equipment, net | 4,760 | 4,361 |
Depreciation and amortization expense | 882 | 851 | $ 862
(Gain) loss on asset disposals, net | $ 27 | $ 26 | $ 27
Buildings | Minimum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 5 years |  |
Buildings | Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 40 years |  |
Leasehold and land improvements | Minimum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 1 year |  |
Leasehold and land improvements | Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 30 years |  |
Cable and wire | Minimum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 15 years |  |
Cable and wire | Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 40 years |  |
Network and switching equipment | Minimum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 3 years |  |
Network and switching equipment | Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 10 years |  |
Cell site equipment | Minimum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 7 years |  |
Cell site equipment | Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 25 years |  |
Office furniture and equipment | Minimum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 3 years |  |
Office furniture and equipment | Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 10 years |  |
Other operating assets and equipment | Minimum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 1 year |  |
Other operating assets and equipment | Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 12 years |  |
System development | Minimum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 1 year |  |
System development | Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 7 years |  |

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