CONSOLIDATED STATEMENTS OF CASH FLOWS CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Millions	1 Months Ended		3 Months Ended
	Mar. 31, 2017	Jul. 31, 2016	Sep. 30, 2016
Statement of Cash Flows [Abstract]
Defined benefit plan contributions made	$ (135)	$ (115)	$ (115)