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Employee Benefits - Additional Information (Detail) (USD $)
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12 Months Ended | 12 Months Ended | 4 Months Ended | 12 Months Ended | |||||||||||||||||
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Dec. 31, 2013
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Dec. 31, 2012
Employee
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2012
Verizon Management Defined Benefit Pension Plan Employees
Employee
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Dec. 31, 2013
Return Seeking Assets
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Dec. 31, 2013
Liability Hedging Assets
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Dec. 31, 2012
Verizon Management Pension Plan Liabilities Expected to be Purchased by The Prudential Insurance Company of America and Prudential Financial Inc.
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Dec. 10, 2012
Verizon Management Pension Plan Liabilities Expected to be Purchased by The Prudential Insurance Company of America and Prudential Financial Inc.
Employee
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Dec. 31, 2012
Charges Primarily Driven By Decrease In Discount Rate Assumption
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Dec. 31, 2011
Charges Primarily Driven By Decrease In Discount Rate Assumption
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Dec. 31, 2013
Charges Due To Difference Between Estimated Return On Assets And Actual Return On Assets
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Dec. 31, 2012
Charges Due To Difference Between Estimated Return On Assets And Actual Return On Assets
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Dec. 31, 2011
Charges Due To Difference Between Estimated Return On Assets And Actual Return On Assets
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Dec. 31, 2012
Annuitization Benefit
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Dec. 31, 2012
Severance charges to management employees
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Dec. 31, 2013
Non Qualified Pension Plans
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Dec. 31, 2013
Postretirement Benefit Plans
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Dec. 31, 2013
Qualified Pension Trusts
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Dec. 31, 2013
Charges Primarily Driven By Increase In Discount Rate Assumption
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Dec. 31, 2013
Charges Primarily Driven By Other Assumption Adjustments
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| Defined Benefit Plan Disclosure [Line Items] | |||||||||||||||||||||
| Management Retirees Covered By Group Annuity Contract | 43,000 | ||||||||||||||||||||
| Accumulated benefit obligation for all defined benefit pension plans | $ 22,900,000,000 | $ 26,500,000,000 | |||||||||||||||||||
| Define benefits postretirement plans amortized from accumulated other comprehensive income | 300,000,000 | ||||||||||||||||||||
| Defined benefit plan, period used to determine overall expected long term rate of return on assets assumption (in years) | 10 | ||||||||||||||||||||
| Target allocation percentage of assets | 70.00% | 30.00% | |||||||||||||||||||
| Defined benefit plan contributions by employer | 2,600,000,000 | 100,000,000 | 1,400,000,000 | ||||||||||||||||||
| Defined benefit plan contributions by employer in next fiscal year | 200,000,000 | 1,400,000,000 | 1,200,000,000 | ||||||||||||||||||
| Number of unallocated shares of common stock in ESOP | 163,000 | ||||||||||||||||||||
| Number of allocated shares of common stock in ESOP | 62,000,000 | ||||||||||||||||||||
| Total savings plan cost | 1,000,000,000 | 700,000,000 | 700,000,000 | ||||||||||||||||||
| Number of Retirees Covered Under Group Annuity Contract | 41,000 | ||||||||||||||||||||
| Severance, Pension and Benefit (Credits) Charges | $ (6,232,000,000) | $ 7,186,000,000 | $ 5,954,000,000 | $ 5,300,000,000 | $ 5,000,000,000 | $ (500,000,000) | $ 700,000,000 | $ 900,000,000 | $ 1,000,000,000 | $ 400,000,000 | $ (4,300,000,000) | $ (1,400,000,000) | |||||||||
| Discount Rate | 5.00% | 4.20% | 5.00% | 5.75% | |||||||||||||||||
| Expected return on plan assets | 7.50% | 8.00% | |||||||||||||||||||
| Actual return on assets | 8.60% | 10.00% | 5.00% | ||||||||||||||||||
| Number of management employees | 4,000 | ||||||||||||||||||||