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Variable Interest Entities, Narrative (Details) - USD ($) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2017 | Jun. 30, 2016
Variable Interest Entities, Other Disclosures |  |
Transfer of net equipment installment plan receivables | $ 883 |
Capital contributions, loans or advances | 676 | $ 26
Investment in unconsolidated entities, maximum exposure | 4 | $ 6
USCC EIP LLC |  |
Variable Interest Entities, Other Disclosures |  |
Capital contributions, loans or advances | $ 659 |

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- Definition Amount of derecognized financial assets from transactions which comprise an initial transfer and an agreement entered into in contemplation of the initial transfer resulting in retention of substantially all of the exposure to the economic return throughout the term of the transaction, at the date of derecognition. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82924980&loc=SL51823488-111719 + Details
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- Definition The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph b -URI http://asc.fasb.org/extlink&oid=77990344&loc=d3e5728-111685 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=77990344&loc=d3e5747-111685 + Details
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- Definition The amount of financial or other support the reporting entity has provided (explicitly or implicitly) to the Variable Interest Entity (VIE) that it was not previously contractually required to provide or that the reporting entity intends to provide, including, for example, situations in which the reporting entity assisted the VIE in obtaining another type of support. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 5A -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=77990344&loc=SL6759159-111685 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | debit
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- Details
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