Consolidated Statement of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net Income (Loss) Attributable to Parent	$ 377	$ 275	$ 729	$ 525
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	(382)	142	(455)	192
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	(91)	(69)	(163)	(170)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	5	(4)	26	(28)
Other Comprehensive Income (Loss), Net of Tax	(468)	69	(592)	(6)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ (91)	$ 344	$ 137	$ 519