Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

Name:	us-gaap_AccountsReceivableNetCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

Variable Interest Entities (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015
Assets
Cash and cash equivalents	$ 896	$ 1,054	$ 900	$ 985
Accounts receivable	739		753
Other current assets	30		32
Licenses	1,904		1,895
Property, plant and equipment, net	3,449		3,555
Other assets and deferred charges	449		434
Liabilities
Current liabilities	738		887
Variable Interest Entities, Other Disclosures
Transfer of net equipment installment plan receivables	679
Capital contributions, loans or advances	654	13
Investments in unconsolidated entities	472	$ 423	451
Consolidated Variable Interest Entities
Assets
Cash and cash equivalents	2		2
Accounts receivable	395		39
Other current assets	6		6
Licenses	649		649
Property, plant and equipment, net	91		93
Other assets and deferred charges	197		15
Total assets	1,340		804
Liabilities
Current liabilities	41		18
Deferred liabilities and credits	12		12
Total liabilities	53		30
Unconsolidated Variable Interest Entities
Variable Interest Entities, Other Disclosures
Investments in unconsolidated entities	6		$ 6
USCC EIP LLC
Variable Interest Entities, Other Disclosures
Capital contributions, loans or advances	$ 650