Device Payment Plan Receivables, Net (Detail) - USD ($) $ in Millions |
Jun. 30, 2017 |
Dec. 31, 2016 |
Jun. 30, 2016 |
Dec. 31, 2015 |
|---|---|---|---|---|
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||
| Device payment plan agreement receivables, gross | $ 14,505 | $ 11,797 | ||
| Unamortized imputed interest | (654) | (511) | ||
| Device payment plan agreement receivables, net of unamortized imputed interest | 13,851 | 11,286 | ||
| Allowance for credit losses | (715) | (688) | $ (578) | $ (444) |
| Device payment plan agreement receivables, net | 13,136 | 10,598 | ||
| Accounts Receivable, net | ||||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||
| Device payment plan agreement receivables, net | 8,548 | 6,140 | ||
| Other Assets | ||||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||
| Device payment plan agreement receivables, net | $ 4,588 | $ 4,458 |