Pension, Other Postretirement Benefits and Savings Plans - Fair Values of Pension Plan Assets (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
U.S.
Defined Benefit Plan Disclosure [Line Items]
Plan assets, fair value	$ 3,803	$ 3,765
Total plan assets, fair value	4,972	5,011	$ 6,250
Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Plan assets, fair value	1,836	1,755
Total plan assets, fair value	2,507	2,493	2,721
Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	58	100
Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	152	154
Significant Other Observable Inputs (Level 2) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	3,743	3,663
Significant Other Observable Inputs (Level 2) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	1,488	1,464
Significant Unobservable Inputs (Level 3) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	2	2
Significant Unobservable Inputs (Level 3) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	196	137
Cash and Short Term Securities | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	62	103
Cash and Short Term Securities | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	24	28
Cash and Short Term Securities | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	58	100
Cash and Short Term Securities | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	23	28
Cash and Short Term Securities | Significant Other Observable Inputs (Level 2) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	4	3
Cash and Short Term Securities | Significant Other Observable Inputs (Level 2) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	1	0
Cash and Short Term Securities | Significant Unobservable Inputs (Level 3) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Cash and Short Term Securities | Significant Unobservable Inputs (Level 3) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Equity Securities, Non-U.S. Companies | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Equity Securities, Non-U.S. Companies | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	20	19
Equity Securities, Non-U.S. Companies | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Equity Securities, Non-U.S. Companies | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	20	19
Equity Securities, Non-U.S. Companies | Significant Other Observable Inputs (Level 2) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Equity Securities, Non-U.S. Companies | Significant Other Observable Inputs (Level 2) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Equity Securities, Non-U.S. Companies | Significant Unobservable Inputs (Level 3) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Equity Securities, Non-U.S. Companies | Significant Unobservable Inputs (Level 3) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Equity Securities, Commingled Funds | U.S.
Defined Benefit Plan Disclosure [Line Items]
Plan assets at net asset value	38	6
Total plan assets, fair value	0	0
Equity Securities, Commingled Funds | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Plan assets at net asset value	59	121
Total plan assets, fair value	134	17
Equity Securities, Commingled Funds | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Equity Securities, Commingled Funds | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	16	17
Equity Securities, Commingled Funds | Significant Other Observable Inputs (Level 2) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Equity Securities, Commingled Funds | Significant Other Observable Inputs (Level 2) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Equity Securities, Commingled Funds | Significant Unobservable Inputs (Level 3) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Equity Securities, Commingled Funds | Significant Unobservable Inputs (Level 3) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	118	0
Equity Securities, Mutual Funds | U.S.
Defined Benefit Plan Disclosure [Line Items]
Plan assets at net asset value	0	0
Total plan assets, fair value	0	0
Equity Securities, Mutual Funds | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Plan assets at net asset value	21	57
Total plan assets, fair value	3	3
Equity Securities, Mutual Funds | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Equity Securities, Mutual Funds | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	3	3
Equity Securities, Mutual Funds | Significant Other Observable Inputs (Level 2) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Equity Securities, Mutual Funds | Significant Other Observable Inputs (Level 2) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Equity Securities, Mutual Funds | Significant Unobservable Inputs (Level 3) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Equity Securities, Mutual Funds | Significant Unobservable Inputs (Level 3) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Equity Securities, Partnership Interests | U.S.
Defined Benefit Plan Disclosure [Line Items]
Plan assets at net asset value	263	295
Equity Securities, Partnership Interests | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Plan assets at net asset value	0	0
Debt Securities, Corporate Bonds | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	2,707	2,413
Debt Securities, Corporate Bonds | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	154	154
Debt Securities, Corporate Bonds | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Debt Securities, Corporate Bonds | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	13	14
Debt Securities, Corporate Bonds | Significant Other Observable Inputs (Level 2) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	2,707	2,413
Debt Securities, Corporate Bonds | Significant Other Observable Inputs (Level 2) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	141	140
Debt Securities, Corporate Bonds | Significant Unobservable Inputs (Level 3) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Debt Securities, Corporate Bonds | Significant Unobservable Inputs (Level 3) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Debt Securities, Government Bonds | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	968	1,091
Debt Securities, Government Bonds | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	2,148	2,093
Debt Securities, Government Bonds | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Debt Securities, Government Bonds | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	68	67
Debt Securities, Government Bonds | Significant Other Observable Inputs (Level 2) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	968	1,091
Debt Securities, Government Bonds | Significant Other Observable Inputs (Level 2) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	2,080	2,026
Debt Securities, Government Bonds | Significant Unobservable Inputs (Level 3) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Debt Securities, Government Bonds | Significant Unobservable Inputs (Level 3) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Debt Securities, Repurchase Agreements | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Debt Securities, Repurchase Agreements | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	(777)	(719)
Debt Securities, Repurchase Agreements | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Debt Securities, Repurchase Agreements | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Debt Securities, Repurchase Agreements | Significant Other Observable Inputs (Level 2) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Debt Securities, Repurchase Agreements | Significant Other Observable Inputs (Level 2) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	(777)	(719)
Debt Securities, Repurchase Agreements | Significant Unobservable Inputs (Level 3) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Debt Securities, Repurchase Agreements | Significant Unobservable Inputs (Level 3) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Debt Securities, Asset Backed Securities | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	63	158
Debt Securities, Asset Backed Securities | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	30	11
Debt Securities, Asset Backed Securities | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Debt Securities, Asset Backed Securities | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	2	2
Debt Securities, Asset Backed Securities | Significant Other Observable Inputs (Level 2) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	63	158
Debt Securities, Asset Backed Securities | Significant Other Observable Inputs (Level 2) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	28	2
Debt Securities, Asset Backed Securities | Significant Unobservable Inputs (Level 3) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Debt Securities, Asset Backed Securities | Significant Unobservable Inputs (Level 3) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	7
Debt Securities, Commingled Funds | U.S.
Defined Benefit Plan Disclosure [Line Items]
Plan assets at net asset value	697	714
Total plan assets, fair value	0	0
Debt Securities, Commingled Funds | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Plan assets at net asset value	471	431
Total plan assets, fair value	9	9
Debt Securities, Commingled Funds | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Debt Securities, Commingled Funds | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Debt Securities, Commingled Funds | Significant Other Observable Inputs (Level 2) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Debt Securities, Commingled Funds | Significant Other Observable Inputs (Level 2) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	9	9
Debt Securities, Commingled Funds | Significant Unobservable Inputs (Level 3) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Debt Securities, Commingled Funds | Significant Unobservable Inputs (Level 3) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Debt Securities, Mutual Funds | U.S.
Defined Benefit Plan Disclosure [Line Items]
Plan assets at net asset value	123	86
Total plan assets, fair value	0	0
Debt Securities, Mutual Funds | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Plan assets at net asset value	5	5
Total plan assets, fair value	5	3
Debt Securities, Mutual Funds | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Debt Securities, Mutual Funds | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	5	3
Debt Securities, Mutual Funds | Significant Other Observable Inputs (Level 2) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Debt Securities, Mutual Funds | Significant Other Observable Inputs (Level 2) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Debt Securities, Mutual Funds | Significant Unobservable Inputs (Level 3) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Debt Securities, Mutual Funds | Significant Unobservable Inputs (Level 3) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Short Term Securities, Commingled Funds | U.S.
Defined Benefit Plan Disclosure [Line Items]
Plan assets at net asset value	87	137
Short Term Securities, Commingled Funds | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Plan assets at net asset value	2	2
Alternatives, Commingled Funds | U.S.
Defined Benefit Plan Disclosure [Line Items]
Plan assets at net asset value	0	0
Alternatives, Commingled Funds | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Plan assets at net asset value	154	127
Alternatives, Real Estate | U.S.
Defined Benefit Plan Disclosure [Line Items]
Plan assets at net asset value	0	0
Total plan assets, fair value	0	0
Alternatives, Real Estate | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Plan assets at net asset value	59	69
Total plan assets, fair value	62	72
Alternatives, Real Estate | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Alternatives, Real Estate | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Alternatives, Real Estate | Significant Other Observable Inputs (Level 2) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Alternatives, Real Estate | Significant Other Observable Inputs (Level 2) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	1	0
Alternatives, Real Estate | Significant Unobservable Inputs (Level 3) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Alternatives, Real Estate | Significant Unobservable Inputs (Level 3) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	61	72	67
Alternatives, Insurance Contracts | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	2	2
Alternatives, Insurance Contracts | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	14	56
Alternatives, Insurance Contracts | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Alternatives, Insurance Contracts | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Alternatives, Insurance Contracts | Significant Other Observable Inputs (Level 2) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Alternatives, Insurance Contracts | Significant Other Observable Inputs (Level 2) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Alternatives, Insurance Contracts | Significant Unobservable Inputs (Level 3) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	2	2
Alternatives, Insurance Contracts | Significant Unobservable Inputs (Level 3) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	14	56	$ 18
Alternatives, Other Investments | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	1	(2)
Alternatives, Other Investments | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	10	9
Alternatives, Other Investments | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Alternatives, Other Investments | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	2	1
Alternatives, Other Investments | Significant Other Observable Inputs (Level 2) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	1	(2)
Alternatives, Other Investments | Significant Other Observable Inputs (Level 2) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	5	6
Alternatives, Other Investments | Significant Unobservable Inputs (Level 3) | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	0	0
Alternatives, Other Investments | Significant Unobservable Inputs (Level 3) | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	3	2
Total Investments | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	5,011	5,003
Total Investments | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	2,607	2,567
Other | U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	(39)	8
Other | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total plan assets, fair value	$ (100)	$ (74)