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Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (Fair Value, Measurements, Recurring, USD $)
In Millions, unless otherwise specified
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Dec. 31, 2014
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Fair value of assets measured on a recurring basis |
$ 1,776us-gaap_AssetsFairValueDisclosureRecurring |
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| Fair value of liabilities measured on a recurring basis |
818us-gaap_LiabilitiesFairValueDisclosureRecurring |
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Short-term Investment | Equity Securities
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|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Fair value of assets measured on a recurring basis |
295us-gaap_AssetsFairValueDisclosureRecurring
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_EquitySecuritiesMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_ShortTermInvestmentsMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember |
|
|
Short-term Investment | Fixed Income Securities
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Fair value of assets measured on a recurring basis |
260us-gaap_AssetsFairValueDisclosureRecurring
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_FixedIncomeSecuritiesMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_ShortTermInvestmentsMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember |
|
|
Other Assets | Fixed Income Securities
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Fair value of assets measured on a recurring basis |
1,143us-gaap_AssetsFairValueDisclosureRecurring
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_FixedIncomeSecuritiesMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_OtherAssetsMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember |
|
|
Other Assets | Interest Rate Swap
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|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Fair value of assets measured on a recurring basis |
72us-gaap_AssetsFairValueDisclosureRecurring
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_OtherAssetsMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember |
|
|
Other Assets | Cross Currency Swaps
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|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Fair value of assets measured on a recurring basis |
6us-gaap_AssetsFairValueDisclosureRecurring
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_CurrencySwapMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_OtherAssetsMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember |
|
|
Other Current Liabilities | Cross Currency Swap and Other
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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|
| Fair value of liabilities measured on a recurring basis |
74us-gaap_LiabilitiesFairValueDisclosureRecurring
/ us-gaap_FairValueByAssetClassAxis
= vz_CrossCurrencySwapAndOtherMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_OtherCurrentLiabilitiesMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember |
|
|
Other Liabilities | Cross Currency Swaps
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|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Fair value of liabilities measured on a recurring basis |
528us-gaap_LiabilitiesFairValueDisclosureRecurring
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_CurrencySwapMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember |
|
|
Other Liabilities | Forward Interest Rate Swaps
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|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Fair value of liabilities measured on a recurring basis |
216us-gaap_LiabilitiesFairValueDisclosureRecurring
/ us-gaap_FairValueByAssetClassAxis
= vz_ForwardInterestRateSwapsMember
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember |
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Level 1
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Fair value of assets measured on a recurring basis |
545us-gaap_AssetsFairValueDisclosureRecurring
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember |
[1] |
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Level 1 | Short-term Investment | Equity Securities
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|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Fair value of assets measured on a recurring basis |
295us-gaap_AssetsFairValueDisclosureRecurring
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_EquitySecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_ShortTermInvestmentsMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember |
[1] |
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Level 1 | Other Assets | Fixed Income Securities
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Fair value of assets measured on a recurring basis |
250us-gaap_AssetsFairValueDisclosureRecurring
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_FixedIncomeSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_OtherAssetsMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember |
[1] |
|
Level 2
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Fair value of assets measured on a recurring basis |
1,231us-gaap_AssetsFairValueDisclosureRecurring
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember |
[2] |
| Fair value of liabilities measured on a recurring basis |
818us-gaap_LiabilitiesFairValueDisclosureRecurring
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember |
[2] |
|
Level 2 | Short-term Investment | Fixed Income Securities
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Fair value of assets measured on a recurring basis |
260us-gaap_AssetsFairValueDisclosureRecurring
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_FixedIncomeSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_ShortTermInvestmentsMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember |
[2] |
|
Level 2 | Other Assets | Fixed Income Securities
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|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Fair value of assets measured on a recurring basis |
893us-gaap_AssetsFairValueDisclosureRecurring
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_FixedIncomeSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_OtherAssetsMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember |
[2] |
|
Level 2 | Other Assets | Interest Rate Swap
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|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Fair value of assets measured on a recurring basis |
72us-gaap_AssetsFairValueDisclosureRecurring
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_OtherAssetsMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember |
[2] |
|
Level 2 | Other Assets | Cross Currency Swaps
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|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Fair value of assets measured on a recurring basis |
6us-gaap_AssetsFairValueDisclosureRecurring
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_CurrencySwapMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_OtherAssetsMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember |
[2] |
|
Level 2 | Other Current Liabilities | Cross Currency Swap and Other
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Fair value of liabilities measured on a recurring basis |
74us-gaap_LiabilitiesFairValueDisclosureRecurring
/ us-gaap_FairValueByAssetClassAxis
= vz_CrossCurrencySwapAndOtherMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_OtherCurrentLiabilitiesMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember |
[2] |
|
Level 2 | Other Liabilities | Cross Currency Swaps
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Fair value of liabilities measured on a recurring basis |
528us-gaap_LiabilitiesFairValueDisclosureRecurring
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_CurrencySwapMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember |
[2] |
|
Level 2 | Other Liabilities | Forward Interest Rate Swaps
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Fair value of liabilities measured on a recurring basis |
$ 216us-gaap_LiabilitiesFairValueDisclosureRecurring
/ us-gaap_FairValueByAssetClassAxis
= vz_ForwardInterestRateSwapsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember |
[2] |
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