Pensions Benefit Plans and Other Postretirement Benefits - Funded Status (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Pension Benefit Plans
Defined Benefit Plan Disclosure
Percentage of minimum target plan asset allocations	10.00%
U.S Pension Plans
Defined Benefit Plan Disclosure
Plan assets at fair value	$ 1,654	$ 1,909	$ 2,190
Projected benefit and postretirement benefit obligations	1,956	2,190	2,428
Plan assets less than projected benefit obligations	(302)	(281)
Items not yet recognized in pension expense and net postretirement benefit cost:
Actuarial loss	1,046	1,145
Prior service cost (credit)	1	2
Total	1,047	1,147
Net amount recognized	745	866
Non-U.S. Pension Plans
Defined Benefit Plan Disclosure
Plan assets at fair value	1,011	1,012	1,094
Projected benefit and postretirement benefit obligations	1,235	1,210	1,311
Plan assets less than projected benefit obligations	(224)	(198)
Items not yet recognized in pension expense and net postretirement benefit cost:
Actuarial loss	352	320
Prior service cost (credit)	(1)	(1)
Total	351	319
Net amount recognized	127	121
U.S Postretirement Benefit Plans
Defined Benefit Plan Disclosure
Projected benefit and postretirement benefit obligations	92	97	111
Items not yet recognized in pension expense and net postretirement benefit cost:
Actuarial loss	(21)	(23)
Prior service cost (credit)	30	38
Total	9	15
Net amount recognized	(83)	(82)
Non-U.S. Postretirement Benefit Plans
Defined Benefit Plan Disclosure
Projected benefit and postretirement benefit obligations	81	68	$ 81
Items not yet recognized in pension expense and net postretirement benefit cost:
Actuarial loss	(6)	3
Total	(6)	3
Net amount recognized	$ (87)	$ (65)