Taxes - Schedule of Deferred Taxes (Detail) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Deferred tax assets | ||
| Employee benefits | $ 3,366 | $ 3,676 |
| Tax loss, credit, and other carry forwards | 1,423 | 1,719 |
| Lease liabilities | 4,909 | 5,138 |
| Other - assets | 1,847 | 1,735 |
| Deferred tax assets, gross | 11,545 | 12,268 |
| Valuation allowances | (1,161) | (1,399) |
| Deferred tax assets | 10,384 | 10,869 |
| Deferred tax liabilities | ||
| Spectrum and other intangible amortization | 30,568 | 29,302 |
| Depreciation | 21,136 | 20,424 |
| Lease right-of-use assets | 4,568 | 4,822 |
| Other - liabilities | 2,694 | 2,904 |
| Deferred tax liabilities | 58,966 | 57,452 |
| Net deferred tax liability | $ 48,582 | $ 46,583 |
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- Definition Amount of deferred tax liability attributable to taxable temporary differences. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences from employee benefits, classified as other. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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- Definition Amount of deferred tax liability attributable to taxable temporary differences from intangible assets other than goodwill. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of deferred tax liability attributable to taxable temporary differences classified as other. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Deferred Tax Assets, Leases No definition available.
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- Definition Deferred Tax Liabilities, Leases, Right-Of-Use Assets No definition available.
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