CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Parentheticals) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	$ 58	$ 24
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Tax	$ 6	4
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax		(6)
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Tax		$ (10)