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	$ 572	$ 772	$ 586	$ 715
Accounts receivable	644		658
Other current assets	21		23
Assets held for sale	5		8
Licenses	1,895		1,886
Property, plant and equipment, net	2,377		2,470
Other assets and deferred charges	419		405
Liabilities
Current liabilities	587		718
Variable Interest Entities, Other Disclosures
Capital contributions, loans or advances	654	$ 13
Investments in unconsolidated entities	434		413
Transfer of net equipment installment plan receivables	679
Consolidated Variable Interest Entities
Assets
Cash and cash equivalents	2		2
Accounts receivable	397		44
Other current assets	7		6
Assets held for sale			2
Licenses	655		652
Property, plant and equipment, net	102		105
Other assets and deferred charges	198		16
Total assets	1,361		827
Liabilities
Current liabilities	44		21
Deferred liabilities and credits	13		13
Total liabilities	57		34
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