Consolidated Statements of Comprehensive Income (unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Statement of Other Comprehensive Income [Abstract]
Net Income	$ 292	$ 294	$ 556	$ 308
Unrealized Change in Fair Value	0	0	0	23
Less Tax Provision	0	0	0	(8)
Net Change in Other	1	1	3	3
Other Comprehensive Income	1	1	3	18
Comprehensive Income	$ 293	$ 295	$ 559	$ 326