Amount after tax of income (loss) from continuing operations attributable to the parent.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.13)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=68079674&loc=SL4613673-111683

Name:	us-gaap_IncomeLossFromContinuingOperations
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Dispositions (Narrative) (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
Dispositions (Narrative) (Details) - USD ($) $ in Millions	Jul. 16, 2015	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income (Loss) from Continuing Operations Attributable to Parent			$ 1,192	$ 1,154	$ 1,514
Sale of LFM to Entercom [Member]
Income (Loss) from Continuing Operations Attributable to Parent		$ 28		$ 2
Sale of LFM to Entercom [Member] \| Cash [Member]
Pre-Tax Proceeds	$ 75
Sale of LFM to Entercom [Member] \| Convertible Preferred Stock [Member]
Pre-Tax Proceeds	$ 28