Wireless Equipment Installment Plans - Additional Information (Detail) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Long-term portion of financing receivables	$ 6,628,000,000us-gaap_OtherAssetsNoncurrent	$ 4,535,000,000us-gaap_OtherAssetsNoncurrent
Verizon Edge
Accounts, Notes, Loans and Financing Receivable [Line Items]
Minimum number of days before customers become eligible to upgrade their phone to a new phone under Verizon Edge	30 days
Guarantee liability	700,000,000
Finance Leases Financing Receivable \| Verizon Edge
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current portion of financing receivables	2,300,000,000
Long-term portion of financing receivables	$ 1,200,000,000

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Financing receivables that are current.

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This item represents a non-contingent liability for the fair value of an obligation to stand ready to perform over the term of a guaranty issued in the event that specified triggering events or conditions occur.

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Aggregate carrying amount, as of the balance sheet date, of noncurrent assets not separately disclosed in the balance sheet. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer).

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Minimum number of days before a customer becomes eligible to upgrade their phone to a new phone under Verizon Edge.

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