CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Reclassification of unrealized losses on cash flow hedges from accumulated other comprehensive income (loss) to net income (net of $4, $3, $9 and $26 tax expense, respectively)	$ 4	$ 3	$ 9	$ 26
Net unrealized gains on securities still held (net of $23, $23, $68 and $42 tax expense, respectively)	23	23	68	42
Reclassification from accumulated other comprehensive income (loss) to net income (net of $4, $2, $15 and $6 tax benefit, respectively)	(4)	(2)	(15)	(6)
Defined benefit pension and other benefits plans (net of less than $1 tax benefit, $4 tax expense and $4 tax benefit, respectively)	(1)	0	4	(4)
Net unrealized gains (losses) on foreign currency translation (net of less than $1, $1 and $1 tax expense and $2 tax benefit, respectively)	1	1	1	(2)
Other comprehensive income (loss) related to equity method investee (net of less than $1 tax expense, $0, less than $1 tax expense and $3 tax benefit, respectively)	$ 1	$ 0	$ 1	$ (3)