CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) - USD ($) $ in Millions		3 Months Ended
	Apr. 17, 2017	Mar. 31, 2017
Net cumulative-effect adjustment		$ 59
Common stock, date dividend to be paid		Apr. 17, 2017
Subsequent Event [Member]
Common stock, shares issued as stock dividend	3,346,865