Consolidated Statements of Shareholders' Equity (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Stockholders' Equity [Abstract]
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	$ 0	$ (8)	$ 21
Other Comprehensive Income (Loss), Foreign Currency Translation Reclassification Adjustment from AOCI, Tax			0
Pension and post-retirement benefit plans (tax impact)	(13)	(14)	4
Employee Stock Option And SARs Exercises Value, Tax		0	(85)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	$ 6	$ (2)	$ (16)