v2.4.1.9
Recorded Severance Liability (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]      
Beginning of Year $ 757us-gaap_SupplementalUnemploymentBenefitsSeveranceBenefits $ 1,010us-gaap_SupplementalUnemploymentBenefitsSeveranceBenefits $ 1,113us-gaap_SupplementalUnemploymentBenefitsSeveranceBenefits
Charged to Expense 531vz_SeveranceLiabilityChargedToExpense 134vz_SeveranceLiabilityChargedToExpense 396vz_SeveranceLiabilityChargedToExpense
Payments (406)us-gaap_PaymentsForPostemploymentBenefits (381)us-gaap_PaymentsForPostemploymentBenefits (531)us-gaap_PaymentsForPostemploymentBenefits
Other (7)vz_OtherSeveranceLiability (6)vz_OtherSeveranceLiability 32vz_OtherSeveranceLiability
End of Year $ 875us-gaap_SupplementalUnemploymentBenefitsSeveranceBenefits $ 757us-gaap_SupplementalUnemploymentBenefitsSeveranceBenefits $ 1,010us-gaap_SupplementalUnemploymentBenefitsSeveranceBenefits