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Post-Employment and Other Long-Term Employees Benefits (Tables)

12 Months Ended

Dec. 31, 2017

Retirement Benefits [Abstract]

Changes in Benefit Obligation and Plan Assets

The changes in benefit obligation and plan assets were as follows:

		Pension Benefits								Other Long-Term Benefits
		December 31, 2017				December 31, 2016				December 31, 2017				December 31, 2016
Change in benefit obligation:
Benefit obligation at beginning of year			825				816				52				54
Service cost			27				27				3				3
Interest cost			23				25				2				2
Employee contributions			4				7				—				—
Benefits paid			(16	)			(27	)			(2	)			(5	)
Effect of curtailment			—				(6	)			—				(1	)
Effect of settlement			(10	)			(10	)			—				—
Actuarial (gain) loss			25				36				3				—
Foreign currency translation adjustment			58				(43	)			7				(1	)
Benefit obligation at end of year			936				825				65				52
Change in plan assets:
Plan assets at fair value at beginning of year			477				473				—				—
Actual return on plan assets			40				31				—				—
Employer contributions			27				27				—				—
Employee contributions			4				7				—				—
Benefits paid			(7	)			(18	)			—				—
Effect of settlement			(10	)			(10	)			—				—
Foreign currency translation adjustments			21				(33	)			—				—
Plan assets at fair value at end of year			552				477				—				—
Funded status			(384	)			(348	)			(65	)			(52	)

Net amount recognized in the balance sheet consisted of the following:

		Pension Benefits								Other Long-Term Benefits
		December 31, 2017				December 31, 2016				December 31, 2017				December 31, 2016
Non-current assets			1				—				—				—
Current liabilities			(9	)			(9	)			(4	)			(3	)
Long-term liabilities			(376	)			(339	)			(61	)			(49	)
Net amount recognized			(384	)			(348	)			(65	)			(52	)

Accumulated Other Comprehensive Income (Loss) Before Tax Effects

The components of accumulated other comprehensive income (loss) before tax effects were as follows:

		Actuarial (gains)/losses				Prior service cost				Total
Other comprehensive loss as at December 31, 2015			137				3				140
Net amount generated/arising in current year			25				—				25
Amortization			(14	)			(1	)			(15	)
Foreign currency translation adjustment			(9	)			—				(9	)
Other comprehensive loss as at December 31, 2016			139				2				141
Net amount generated/arising in current year			6				—				6
Amortization			(10	)			—				(10	)
Foreign currency translation adjustment			9				—				9
Other comprehensive loss as at December 31, 2017			144				2				146

Schedule of Accumulated Benefit Obligations

The accumulated benefit obligations were as follows:

Pension Benefits

Other Long-Term Benefits

December 31, 2017

December 31, 2016

December 31, 2017

December 31, 2016

Accumulated benefit obligations

828

762

53

41

Components of Net Periodic Benefit Cost

The components of the net periodic benefit cost included the following:

		Pension Benefits												Other Long-term Benefits
		Year ended December 31, 2017				Year ended December 31, 2016				Year ended December 31, 2015				Year ended December 31, 2017				Year ended December 31, 2016				Year ended December 31, 2015
Service cost			27				27				28				3				3				5
Interest cost			23				25				25				2				2				2
Expected return on plan assets			(21	)			(20	)			(22	)			—				—				—
Amortization of actuarial net loss (gain)			9				8				7				3				—				—
Amortization of prior service cost			—				1				1				—				—				—
Effect of settlement			1				—				1				—				—				—
Effect of curtailment			—				—				—				—				(1	)			(1	)
Net periodic benefit cost			39				41				40				8				4				6

Weighted Average Assumptions Used in Determination of Benefit Obligation and Plan Assets

The weighted average assumptions used in the determination of the benefit obligation and the plan assets for the pension plans and the other long-term benefits were as follows:

Assumptions		2017				2016
Discount rate			2.54	%			2.57	%
Salary increase rate			2.37	%			2.74	%
Expected long-term rate of return on funds for the pension expense of the following year			4.23	%			4.24	%

The weighted average assumptions used in the determination of the net periodic benefit cost for the pension plans and the other long-term benefits were as follows:

Assumptions		2017				2016				2015
Discount rate			2.57	%			3.19	%			3.03	%
Salary increase rate			2.74	%			3.07	%			2.65	%
Expected long-term rate of return on funds for the pension expense of the year			4.24	%			4.44	%			4.76	%

Pension Plan Asset Allocation

The Company’s pension plan asset allocation at December 31, 2017 and at December 31, 2016 is as follows:

		Percentage of Plan Assets at December
Asset Category		2017				2016
Cash and cash equivalents			3	%			2	%
Equity securities			30	%			29	%
Government debt securities			3	%			3	%
Corporate debt securities			26	%			26	%
Investments in funds(a)			17	%			18	%
Real estate			2	%			2	%
Other (mainly insurance assets — contracts and reserves)			19	%			20	%
Total			100	%			100	%

(a) Investment in funds are composed approximately of one half in commingled funds mainly invested in corporate bonds (55%) and treasury bonds and notes (45%) and for the other half in multi-strategy funds invested in broadly diversified portfolios of corporate and government bonds, equity and derivative instruments.

Pension Plan Asset Allocation Including Fair-Value Measurements

The Company’s detailed pension plan asset allocation including the fair-value measurements of those plan assets as at December 31, 2017 is as follows:

		Total				Quoted Prices in Active Markets for Identical Assets (Level 1)				Significant Other Observable Inputs (Level 2)				Significant Unobservable Inputs (Level 3)
Cash and cash equivalents			14				14				—				—
Equity securities			167				8				159				—
Government debt securities			18				17				1				—
Corporate debt securities			141				5				136				—
Investment funds			93				2				91				—
Real estate			12				—				12				—
Other (mainly insurance assets — contracts and reserves)			107				—				—				107
TOTAL			552				46				399				107

The Company’s detailed pension plan asset allocation including the fair-value measurements of those plan assets as at December 31, 2016 is as follows:

		Total				Quoted Prices in Active Markets for Identical Assets (Level 1)				Significant Other Observable Inputs (Level 2)				Significant Unobservable Inputs (Level 3)
Cash and cash equivalents			11				11				—				—
Equity securities			137				6				131				—
Government debt securities			13				12				1				—
Corporate debt securities			125				4				121				—
Investment funds			84				6				78				—
Real estate			12				—				11				1
Other (mainly insurance assets — contracts and reserves)			95				—				—				95
TOTAL			477				39				342				96

Reconciliation for Plan Assets Measured at Fair Value Using Unobservable Inputs (Level 3)

For plan assets measured at fair value using significant unobservable inputs (Level 3), the reconciliation between January 1, 2017 and December 31, 2017 is presented as follows:

		Fair Value Measurements using Significant Unobservable Inputs (Level 3)
January 1, 2017			96
Contributions (employer and employee)			12
Actual return on plan assets			(2	)
Net benefit payments(b)			4
Settlements			(8	)
Foreign currency translation adjustment			5
December 31, 2017			107

(b) Net cash flows between benefits paid from the insurance contracts and benefits transferred into the insurance contracts by employees.

For plan assets measured at fair value using significant unobservable inputs (Level 3), the reconciliation between January 1, 2016 and December 31, 2016 is presented as follows:

		Fair Value Measurements using Significant Unobservable Inputs (Level 3)
January 1, 2016			102
Contributions (employer and employee)			16
Actual return on plan assets			(3	)
Net benefit payments(b)			(6	)
Settlements			(10	)
Foreign currency translation adjustment			(3	)
December 31, 2016			96

(b) Net cash flows between benefits paid from the insurance contracts and benefits transferred into the insurance contracts by employees.

Estimated Future Benefit Payments

The Company’s estimated future benefit payments as of December 31, 2017 are as follows:

Years		Pension Benefits				Other Long-term Benefits
2018			32				4
2019			31				5
2020			26				8
2021			36				3
2022			35				4
From 2023 to 2026			264				30

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