v3.4.0.3
Device Installment Plan Receivables, Net (Detail) - USD ($)
$ in Millions
Mar. 31, 2016
Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Device installment plan receivables, gross $ 3,346 $ 3,720
Unamortized imputed interest (135) (142)
Device installment plan receivables, net of unamortized imputed interest 3,211 3,578
Allowance for credit losses (513) (444)
Device installment plan receivables, net 2,698 3,134
Accounts Receivable    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Device installment plan receivables, net 1,663 1,979
Other Assets    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Device installment plan receivables, net $ 1,035 $ 1,155