Employee Benefit Plans - Schedule of Asset Categories of Non-U.S. Pension Plan (Details) - USD ($) $ in Millions		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value		$ 713	$ 767	$ 645
Level 1 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value		5	10
Level 2 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value		673	718
Level 3 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value		35	39
Cash and Cash Equivalents | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value		5	10
Cash and Cash Equivalents | Level 1 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value		5	10
Cash and Cash Equivalents | Level 2 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value		0	0
Cash and Cash Equivalents | Level 3 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value		0	0
Asset Allocation | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[1]	152	124
Asset Allocation | Level 1 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[1]	0	0
Asset Allocation | Level 2 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[1]	152	124
Asset Allocation | Level 3 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[1]	0	0
Corporate Bond Securities - Canada | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[2]	6	0
Corporate Bond Securities - Canada | Level 1 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[2]	0	0
Corporate Bond Securities - Canada | Level 2 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[2]	6	0
Corporate Bond Securities - Canada | Level 3 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[2]	0	0
Foreign Government Debt Securities - Canada | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[3]	19	25
Foreign Government Debt Securities - Canada | Level 1 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[3]	0	0
Foreign Government Debt Securities - Canada | Level 2 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[3]	19	25
Foreign Government Debt Securities - Canada | Level 3 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[3]	0	0
Corporate Bond Securities - U.K. | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[4]	8	113
Corporate Bond Securities - U.K. | Level 1 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[4]	0	0
Corporate Bond Securities - U.K. | Level 2 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[4]	8	113
Corporate Bond Securities - U.K. | Level 3 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[4]	0	0
Foreign Government Debt Securities - U.K. | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[5]	211	196
Foreign Government Debt Securities - U.K. | Level 1 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[5]	0	0
Foreign Government Debt Securities - U.K. | Level 2 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[5]	211	196
Foreign Government Debt Securities - U.K. | Level 3 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[5]	0	0
Corporate Global Bonds [Member] | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[6]	64	0
Corporate Global Bonds [Member] | Level 1 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[6]	0	0
Corporate Global Bonds [Member] | Level 2 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[6]	64	0
Corporate Global Bonds [Member] | Level 3 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[6]	0	0
Equities | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[7]	128	133
Equities | Level 1 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[7]	0	0
Equities | Level 2 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[7]	128	133
Equities | Level 3 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[7]	0	0
Real Estate Funds | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[8]	23	22
Real Estate Funds | Level 1 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[8]	0	0
Real Estate Funds | Level 2 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[8]	0	0
Real Estate Funds | Level 3 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[8]	23	22
Swap [Member] | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[9]	85	127
Swap [Member] | Level 1 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[9]	0	0
Swap [Member] | Level 2 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[9]	85	127
Swap [Member] | Level 3 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value	[9]	0	0
Insurance contracts | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value		12	17
Insurance contracts | Level 1 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value		0	0
Insurance contracts | Level 2 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value		0	0
Insurance contracts | Level 3 inputs | Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure
Fair values of the plan assets by asset category and by levels of fair value		$ 12	$ 17
Global | Equities
Defined Benefit Plan Disclosure
Defined Benefit Plan, Actual Plan Asset Allocations		49.00%
UNITED KINGDOM | Equities
Defined Benefit Plan Disclosure
Defined Benefit Plan, Actual Plan Asset Allocations		31.00%
Emerging Markets | Equities
Defined Benefit Plan Disclosure
Defined Benefit Plan, Actual Plan Asset Allocations		6.00%
North America | Equities
Defined Benefit Plan Disclosure
Defined Benefit Plan, Actual Plan Asset Allocations		5.00%
Asia Pacific | Equities
Defined Benefit Plan Disclosure
Defined Benefit Plan, Actual Plan Asset Allocations		5.00%
Europe | Equities
Defined Benefit Plan Disclosure
Defined Benefit Plan, Actual Plan Asset Allocations		4.00%

[1] Invests in mixes of global common stocks and bonds to achieve broad diversification.

[2] Invests in Canadian Dollar-denominated high quality corporate bonds.

[3] Invests in Canadian Dollar-denominated government issued bonds intended to match the duration of plan liabilities.

[4] Invests passively in British Pound Sterling-denominated investment grade corporate bonds.

[5] Invests passively in British Pound Sterling-denominated government issued bonds.

[6] Invests globally in high quality corporate bonds.

[7] Invests in broad equity funds based on securities offered in various regions or countries. Equity funds are allocated by region as follows: 49% Global; 31% U.K.; 6% Emerging Markets; 5% North America; 5% Asia Pacific; and 4% Europe.

[8] Invests in a diversified range of property throughout the U.K., principally in the retail, office and industrial/warehouse sectors.

[9] Invests in a range of pooled funds which include positions in swap contracts and U.K. sovereign bonds; pooled funds are categorized by maturities of underlying positions. Pooled funds employ leverage in order to match the U.K. Plan's duration and inflation.