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Equipment Installment Plan Receivables, EIP Receivables (Details) - USD ($) $ in Millions | Dec. 31, 2016 | Dec. 31, 2015
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Equipment installment plans [Line Items] |  |
Equipment installment plan receivables, gross | $ 628 | $ 381
Deferred interest | (53) | (23)
Equipment installment plan receivables, net of deferred interest | 575 | 358
Allowance for credit losses | (50) | (26)
Equipment installment plan receivables, net | 525 | 332
Accounts receivable - Due from customers and agents |  |
Equipment installment plans [Line Items] |  |
Equipment installment plan receivables, net | 345 | 264
Other assets and deferred charges |  |
Equipment installment plans [Line Items] |  |
Equipment installment plan receivables, net | $ 180 | $ 68

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- Definition Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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