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Taxes - Schedule of Deferred Taxes (Detail) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Deferred tax assets |  |
Employee benefits | $ 3,676 | $ 3,913
Tax loss, credit, and other carry forwards | 1,719 | 1,922
Lease liabilities | 5,138 | 5,480
Other - assets | 1,735 | 1,708
Deferred tax assets, gross | 12,268 | 13,023
Valuation allowances | (1,399) | (1,341)
Deferred tax assets | 10,869 | 11,682
Deferred tax liabilities |  |
Spectrum and other intangible amortization | 29,302 | 28,535
Depreciation | 20,424 | 20,884
Lease right-of-use assets | 4,822 | 5,200
Other - liabilities | 2,904 | 2,696
Deferred tax liabilities | 57,452 | 57,315
Net deferred tax liability | $ 46,583 | $ 45,633

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