CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Other comprehensive income unrealized holding gain (loss) on securities arising during period tax	$ (1)		$ (1)	$ (1)
Other comprehensive income (loss) pension and other post retirement benefit plans tax	(1)	$ (1)	$ (23)	(3)
Other comprehensive income (loss) derivatives qualifying as hedges tax	$ 3	$ (33)		$ (20)