Segment And Geographic Information (Information Concerning Principal Geographic Areas) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue (loss)	$ 1,710	$ 1,775	$ 3,566	$ 3,327
Income (loss) from continuing operations before income tax	(849)	191	(483)	290
Net income (loss)	(898)	113	(588)	259
Amortization of Debt Discount (Premium)	100	257	211	556
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue (loss)	179	245	369	434
Income (loss) from continuing operations before income tax	102	136	215	222
Net income (loss)	80	98	165	275
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue (loss)	145	103	233	214
Income (loss) from continuing operations before income tax	111	56	142	107
Net income (loss)	92	49	115	98
Latin America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue (loss)	262	251	508	488
Income (loss) from continuing operations before income tax	82	73	134	146
Net income (loss)	66	62	108	94
Asia-Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue (loss)	23	18	2	1
Income (loss) from continuing operations before income tax	23	18	1	(1)
Net income (loss)	23	18	1	(1)
Foreign [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue (loss)	609	617	1,112	1,137
Income (loss) from continuing operations before income tax	318	283	492	474
Net income (loss)	261	227	389	466
Domestic [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue (loss)	1,101	1,158	2,454	2,190
Income (loss) from continuing operations before income tax	(1,167)	(92)	(975)	(184)
Net income (loss)	$ (1,159)	$ (114)	$ (977)	$ (207)