Consolidated Statements of Comprehensive Income Consolidated Statement of Comprehensive Income (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax	$ (21)	$ (7)	$ 144	$ (272)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax	(48)	(15)	(98)	(111)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Tax	$ 1	$ 3	$ 20	$ 18