Segment And Geographic Information (Information Concerning Principal Geographic Areas) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue (loss)	$ 1,713	$ 1,161	$ 5,279	$ 4,488
Income (loss) from continuing operations before income tax	483	(106)	0	184
Net income (loss)	384	(210)	(204)	49
Amortization of Debt Discount (Premium)	79	228	291	784
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue (loss)	158	225	528	659
Income (loss) from continuing operations before income tax	74	138	290	360
Net income (loss)	62	78	227	353
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue (loss)	80	106	312	320
Income (loss) from continuing operations before income tax	29	75	171	183
Net income (loss)	9	55	124	153
Latin America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue (loss)	258	212	766	700
Income (loss) from continuing operations before income tax	83	42	216	188
Net income (loss)	62	30	171	124
Asia-Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue (loss)	22	21	73	60
Income (loss) from continuing operations before income tax	21	20	71	58
Net income (loss)	21	10	71	48
Foreign [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue (loss)	518	564	1,679	1,739
Income (loss) from continuing operations before income tax	207	275	748	789
Net income (loss)	154	173	593	678
Domestic [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue (loss)	1,195	597	3,600	2,749
Income (loss) from continuing operations before income tax	276	(381)	(748)	(605)
Net income (loss)	$ 230	$ (383)	$ (797)	$ (629)