Pension, Other Postretirement Benefits and Savings Plans - Benefit Costs and Amounts Recognized in Other Comprehensive (Income) Loss (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
U.S.
Benefits cost:
Service cost		$ 5	$ 4	$ 15
Interest cost		164	238	256
Expected return on plan assets		(255)	(295)	(311)
Amortization of prior service cost (credit)		0	0	1
Amortization of net losses		109	106	114
Net periodic cost		23	53	75
Curtailments/settlements/termination benefits	$ 137	0	137	32
Total benefits cost		23	190	107
Recognized in other comprehensive (income) loss before tax and minority:
Prior service (credit) cost from plan amendments		0	0	(1)
Increase (decrease) in net actuarial losses		81	150	292
Amortization of prior service (cost) credit in net periodic cost		0	0	(1)
Amortization of net losses in net periodic cost		(109)	(106)	(114)
Immediate recognition of prior service cost and unrecognized gains and losses due to curtailments, settlements, and divestitures		0	(386)	(32)
Deconsolidation of Venezuelan subsidiary		0	0	0
Total recognized in other comprehensive loss (income) before tax and minority		(28)	(342)	144
Total recognized in total benefits cost and other comprehensive loss (income) before tax and minority		(5)	(152)	251
Non-U.S.
Benefits cost:
Service cost		29	43	34
Interest cost		80	113	131
Expected return on plan assets		(88)	(107)	(118)
Amortization of prior service cost (credit)		0	1	1
Amortization of net losses		27	32	35
Net periodic cost		48	82	83
Curtailments/settlements/termination benefits		16	2	(13)
Total benefits cost		64	84	70
Recognized in other comprehensive (income) loss before tax and minority:
Prior service (credit) cost from plan amendments		0	0	1
Increase (decrease) in net actuarial losses		35	(45)	(78)
Amortization of prior service (cost) credit in net periodic cost		0	(1)	(1)
Amortization of net losses in net periodic cost		(27)	(34)	(36)
Immediate recognition of prior service cost and unrecognized gains and losses due to curtailments, settlements, and divestitures		(17)	(5)	(16)
Deconsolidation of Venezuelan subsidiary		0	(62)	0
Total recognized in other comprehensive loss (income) before tax and minority		(9)	(147)	(130)
Total recognized in total benefits cost and other comprehensive loss (income) before tax and minority		55	(63)	(60)
Other Postretirement Benefits
Benefits cost:
Service cost		3	3	4
Interest cost		12	15	19
Expected return on plan assets		0	0	(1)
Amortization of prior service cost (credit)		(45)	(45)	(45)
Amortization of net losses		5	7	8
Net periodic cost		(25)	(20)	(15)
Curtailments/settlements/termination benefits		2	0	0
Total benefits cost		(23)	(20)	(15)
Recognized in other comprehensive (income) loss before tax and minority:
Prior service (credit) cost from plan amendments		0	0	0
Increase (decrease) in net actuarial losses		(1)	(19)	3
Amortization of prior service (cost) credit in net periodic cost		45	45	45
Amortization of net losses in net periodic cost		(5)	(7)	(8)
Immediate recognition of prior service cost and unrecognized gains and losses due to curtailments, settlements, and divestitures		0	4	0
Deconsolidation of Venezuelan subsidiary		0	0	0
Total recognized in other comprehensive loss (income) before tax and minority		39	23	40
Total recognized in total benefits cost and other comprehensive loss (income) before tax and minority		$ 16	$ 3	$ 25