Segment Information Summarized Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information
Net Income (Loss) Available to Common Stockholders, Basic									$ (109)	$ (422)	$ (756)
Other Nonoperating Income (Expense)									(737)	(949)	(838)
Adjusted EBITDA by Segment [Line Items]									1,624	1,459	958
Income Tax Expense (Benefit)									38	48	41
Revenue	1,602	1,569	1,565	1,577	1,614	1,590	1,586	1,586	6,313	6,376	4,333
Capital expenditures									760	743	494
Depreciation and amortization									(800)	(749)	(805)
Total Assets	12,874				13,307				12,874	13,307
Share-based Compensation									(151)	(135)	(101)
Asset Impairment Charges									(7)	0	0
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent									0	0	71
Corporate and Other [Member]
Segment Reporting Information
Adjusted EBITDA by Segment [Line Items]									(714)	(722)	(541)
Capital expenditures									100	99	48
Total Assets	266				284				266	284
North America [Member]
Segment Reporting Information
Adjusted EBITDA by Segment [Line Items]									1,799	1,708	1,325
Capital expenditures									398	407	353
Total Assets	8,133				8,495				8,133	8,495
Europe [Member]
Segment Reporting Information
Adjusted EBITDA by Segment [Line Items]									226	195	104
Capital expenditures									128	115	66
Total Assets	2,030				2,015				2,030	2,015
Latin America [Member]
Segment Reporting Information
Adjusted EBITDA by Segment [Line Items]									313	278	70
Capital expenditures									134	122	27
Total Assets	$ 2,445				$ 2,513				$ 2,445	$ 2,513