CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY Unaudited (Parenthetical) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Common stock, per share	$ 0.44	$ 0.39
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	1,242.18	1,242.18
Preferred stock Series J
Preferred stock, per share	$ 1,225	$ 1,225