CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) - USD ($) $ in Millions		6 Months Ended
	Jul. 17, 2017	Jun. 30, 2017
Net cumulative-effect adjustment		$ 59
Common stock, date dividend to be paid		Jul. 17, 2017
Subsequent Event [Member]
Common stock, shares issued as stock dividend	3,346,738