Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income [Abstract]
AOCI - Foreign Currency Translation Adjustment, Beginning of Period	$ 1,200	$ 1,383	$ 715
Current Period Change in Foreign Currency Translation Adjustment	(171)	(183)	668
AOCI - Foreign Currency Translation Adjustment, End of Period	1,029	1,200	1,383
AOCI - Pension and OPEB, Beginning Balance	10	7	(26)
Net Actuarial Gains and (Losses) and Plan Amendment	7	6	46
Income Taxes	(2)	(2)	(15)
Reclassification of Net Actuarial (Gains) and Losses to Net Earnings		(1)	2
Reclassification of Net Prior Service Costs and (Credits) to Net Earnings	(1)
Curtailment in Net Defined Periodic Benefic Cost	(1)
AOCI - Pension and OPEB, Ending Balance	13	10	7
Total Accumulated Other Comprehensive Income	$ 1,042	$ 1,210	$ 1,390