Retirement Plans and Other Retiree Benefits (Details 1) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Percent of fixed income assets invested in US treasury or agency securities	50.00%	50.00%
United States Pension Plan of US Entity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 1,646	$ 1,624	$ 1,771
Fair value of plan assets, excluding NAV investments	1,056	973
NAV investments	632	651
United States Pension Plan of US Entity | Cash and Cash Equivalents | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	27	16
United States Pension Plan of US Entity | US Common Stocks | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	127	126
United States Pension Plan of US Entity | International Common Stock | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
United States Pension Plan of US Entity | Pooled Funds | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	134	112
United States Pension Plan of US Entity | Fixed Income Securities | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	767	718
United States Pension Plan of US Entity | Guaranteed Investment Contracts | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1	1
United States Pension Plan of US Entity | Domestic, Developed and Emerging Markets Equity Funds
Defined Benefit Plan Disclosure [Line Items]
NAV investments	323	309
United States Pension Plan of US Entity | Fixed Income Funds
Defined Benefit Plan Disclosure [Line Items]
NAV investments	118	123
United States Pension Plan of US Entity | Hedge Funds
Defined Benefit Plan Disclosure [Line Items]
NAV investments	96	131
United States Pension Plan of US Entity | Multi-Asset Funds
Defined Benefit Plan Disclosure [Line Items]
NAV investments	52	49
United States Pension Plan of US Entity | Real Estate
Defined Benefit Plan Disclosure [Line Items]
NAV investments	43	39
United States Pension Plan of US Entity | Other Assets and Liabilities, Net
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(42)	0
International Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	509	520	552
Fair value of plan assets, excluding NAV investments	174	168
NAV investments	335	352
International Pension Benefits | Cash and Cash Equivalents | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13	13
International Pension Benefits | US Common Stocks | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3	3
International Pension Benefits | International Common Stock | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3
International Pension Benefits | Pooled Funds | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	84	76
International Pension Benefits | Fixed Income Securities | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	22	24
International Pension Benefits | Guaranteed Investment Contracts | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	49	52
International Pension Benefits | Domestic, Developed and Emerging Markets Equity Funds
Defined Benefit Plan Disclosure [Line Items]
NAV investments	155	158
International Pension Benefits | Fixed Income Funds
Defined Benefit Plan Disclosure [Line Items]
NAV investments	155	165
International Pension Benefits | Hedge Funds
Defined Benefit Plan Disclosure [Line Items]
NAV investments	3	6
International Pension Benefits | Multi-Asset Funds
Defined Benefit Plan Disclosure [Line Items]
NAV investments	3	4
International Pension Benefits | Real Estate
Defined Benefit Plan Disclosure [Line Items]
NAV investments	19	19
International Pension Benefits | Other Assets and Liabilities, Net
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Other Postretirement Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	14	$ 41
Fair value of plan assets, excluding NAV investments	0	8
NAV investments	0	6
Other Postretirement Benefit Plan | Cash and Cash Equivalents | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Other Postretirement Benefit Plan | US Common Stocks | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	1
Other Postretirement Benefit Plan | International Common Stock | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Other Postretirement Benefit Plan | Pooled Funds | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	1
Other Postretirement Benefit Plan | Fixed Income Securities | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	6
Other Postretirement Benefit Plan | Guaranteed Investment Contracts | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Other Postretirement Benefit Plan | Domestic, Developed and Emerging Markets Equity Funds
Defined Benefit Plan Disclosure [Line Items]
NAV investments	0	3
Other Postretirement Benefit Plan | Fixed Income Funds
Defined Benefit Plan Disclosure [Line Items]
NAV investments	0	1
Other Postretirement Benefit Plan | Hedge Funds
Defined Benefit Plan Disclosure [Line Items]
NAV investments	0	1
Other Postretirement Benefit Plan | Multi-Asset Funds
Defined Benefit Plan Disclosure [Line Items]
NAV investments	0	0
Other Postretirement Benefit Plan | Real Estate
Defined Benefit Plan Disclosure [Line Items]
NAV investments	0	1
Other Postretirement Benefit Plan | Other Assets and Liabilities, Net
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 0	$ 0