CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY Unaudited (Parenthetical) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Common stock, per share	$ 0.28	$ 0.26
Net tax deficiency reclassified from capital surplus to applicable income tax expense		$ 6
Preferred stock Series H
Preferred stock, per share	637.5	$ 637.5
Preferred stock Series I
Preferred stock, per share	828.12	828.12
Preferred stock Series J
Preferred stock, per share	$ 612.5	$ 612.5