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Schedule of Deferred Taxes (Detail) (USD $)
In Millions, unless otherwise specified |
Dec. 31, 2014
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Dec. 31, 2013
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| Schedule of Deferred Income Tax Assets and Liabilities [Line Items] | ||
| Employee benefits | $ 13,350us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits | $ 10,413us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits |
| Tax loss and credit carry forwards | 2,255us-gaap_TaxCreditCarryforwardAmount | 2,912us-gaap_TaxCreditCarryforwardAmount |
| Other - assets | 2,247us-gaap_DeferredTaxAssetsOther | 1,783us-gaap_DeferredTaxAssetsOther |
| Deferred Tax Assets, Gross, Total | 17,852us-gaap_DeferredTaxAssetsGross | 15,108us-gaap_DeferredTaxAssetsGross |
| Valuation allowances | (1,841)us-gaap_DeferredTaxAssetsValuationAllowance | (1,685)us-gaap_DeferredTaxAssetsValuationAllowance |
| Deferred tax assets | 16,011us-gaap_DeferredTaxAssetsNet | 13,423us-gaap_DeferredTaxAssetsNet |
| Spectrum and other intangible amortization | 28,283us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets | 18,280us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets |
| Depreciation | 23,423us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment | 18,913us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment |
| Other - liabilities | 5,754us-gaap_DeferredTaxLiabilitiesOther | 4,315us-gaap_DeferredTaxLiabilitiesOther |
| Deferred tax liabilities | 57,460us-gaap_DeferredTaxLiabilities | 41,508us-gaap_DeferredTaxLiabilities |
| Net deferred tax liability | $ 41,449us-gaap_DeferredTaxAssetsLiabilitiesNet | $ 28,085us-gaap_DeferredTaxAssetsLiabilitiesNet |
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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/presentationRef
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- Definition
Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences not separately disclosed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from employee benefit costs not otherwise specified in the taxonomy, which can only be deducted for tax purposes when actual costs are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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/presentationRef
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- Definition
Amount of deferred tax liability attributable to taxable temporary differences net of deferred tax asset attributable to deductible temporary differences and carryforwards after valuation allowances. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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/2003/role/presentationRef
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- Definition
Amount of deferred tax liability attributable to taxable temporary differences not separately disclosed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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/2003/role/presentationRef
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- Definition
The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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