Pension, Savings and Other Postretirement Benefit Plans - Textual (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Defined contribution savings plan, contribution expense recognized	$ 30		$ 30	$ 93	$ 94
Postretirement benefits credit	(4)		(5)	(17)	(15)
Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Net periodic pension cost	13		$ 22	50	$ 68
Contributions to pension plans	$ 14			45
Minimum | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to funded pension plans in current year				50
Maximum | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to funded pension plans in current year				$ 75
Scenario, Forecast | Change in Assumptions for Pension Plans | Minimum
Defined Benefit Plan Disclosure [Line Items]
Net periodic pension cost						$ (60)
Scenario, Forecast | Change in Assumptions for Pension Plans | Maximum
Defined Benefit Plan Disclosure [Line Items]
Net periodic pension cost						$ (70)
United Kingdom | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Settlement of benefit obligation		$ 41
Settlement charge		$ 14