Postretirement Benefit Plans - Schedule of Change in AOCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined benefit plan amounts recognized in other comprehensive income net actuarial loss portion roll forward
AOCI balance, net actuarial loss portion (net of taxes), beginning of period	$ 550
Adjustments, net actuarial loss	49
Recognized within Net income, net actuarial loss	(76)
Tax effect, net actuarial loss	19
Total change to AOCI, net actuarial loss	(8)
AOCI balance, net actuarial loss portion (net of taxes), period end	542	$ 550
Defined benefit plan amounts recognized in other comprehensive income prior service credit portion roll forward
AOCI balance, net prior service credit (net of taxes), beginning of period	(20)
Adjustments, prior service credit	0
Recognized within Net income, prior service credit	5
Tax effect, prior service credit	(2)	0	$ 0
Total change to AOCI, prior service credit	3
AOCI balance, net prior service credit (net of taxes), period end	(17)	(20)
U.S. defined benefit plan
Defined benefit plan amounts recognized in other comprehensive income net actuarial loss portion roll forward
AOCI balance, net actuarial loss portion (net of taxes), beginning of period	167
Adjustments, net actuarial loss	(10)
Recognized within Net income, net actuarial loss	(42)
Tax effect, net actuarial loss	18
Total change to AOCI, net actuarial loss	(34)
AOCI balance, net actuarial loss portion (net of taxes), period end	133	167
U.S. retiree health care plan
Defined benefit plan amounts recognized in other comprehensive income net actuarial loss portion roll forward
AOCI balance, net actuarial loss portion (net of taxes), beginning of period	80
Adjustments, net actuarial loss	(27)
Recognized within Net income, net actuarial loss	(7)
Tax effect, net actuarial loss	12
Total change to AOCI, net actuarial loss	(22)
AOCI balance, net actuarial loss portion (net of taxes), period end	58	80
Defined benefit plan amounts recognized in other comprehensive income prior service credit portion roll forward
AOCI balance, net prior service credit (net of taxes), beginning of period	(13)
Adjustments, prior service credit	0
Recognized within Net income, prior service credit	3
Tax effect, prior service credit	(1)
Total change to AOCI, prior service credit	2
AOCI balance, net prior service credit (net of taxes), period end	(11)	(13)
Non-U.S. defined benefit plan
Defined benefit plan amounts recognized in other comprehensive income net actuarial loss portion roll forward
AOCI balance, net actuarial loss portion (net of taxes), beginning of period	303
Adjustments, net actuarial loss	86
Recognized within Net income, net actuarial loss	(27)
Tax effect, net actuarial loss	(11)
Total change to AOCI, net actuarial loss	48
AOCI balance, net actuarial loss portion (net of taxes), period end	351	303
Defined benefit plan amounts recognized in other comprehensive income prior service credit portion roll forward
AOCI balance, net prior service credit (net of taxes), beginning of period	(7)
Adjustments, prior service credit	0
Recognized within Net income, prior service credit	2
Tax effect, prior service credit	(1)
Total change to AOCI, prior service credit	1
AOCI balance, net prior service credit (net of taxes), period end	$ (6)	$ (7)