v2.4.1.9
Summary of Reconciliation of Reportable Segment Assets (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Segment Reporting, Asset Reconciling Item [Line Items]      
Assets $ 232,708us-gaap_Assets $ 274,098us-gaap_Assets  
Operating Segments      
Segment Reporting, Asset Reconciling Item [Line Items]      
Assets 237,058us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
231,002us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
227,300us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
Corporate, Eliminations and Other      
Segment Reporting, Asset Reconciling Item [Line Items]      
Assets $ (4,350)us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= vz_CorporateEliminationsAndOtherMember
$ 43,096us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= vz_CorporateEliminationsAndOtherMember