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

12 Months Ended

Dec. 31, 2020

Compensation And Retirement Disclosure [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, 2020			December 31, 2019			December 31, 2020			December 31, 2019
Change in benefit obligation:
Benefit obligation at beginning of year		1,036			911			88			81
Service cost		31			27			11			5
Interest cost		21			24			1			1
Employee contributions		4			3			—			—
Plan amendments		1			1			—			—
Benefits paid		(13	)		(15	)		(11	)		(4	)
Effect of curtailment		—			—			—			—
Effect of settlement		(2	)		(36	)		—			—
Actuarial (gain) loss		83			117			3			6
Foreign currency translation adjustment		55			4			9			(1	)
Benefit obligation at end of year		1,216			1,036			101			88
Change in plan assets:
Plan assets at fair value at beginning of year		597			527			—			—
Actual return on plan assets		84			81			—			—
Employer contributions		17			21			—			—
Employee contributions		4			3			—			—
Benefits paid		(3	)		(5	)		—			—
Effect of settlement		—			(36	)		—			—
Foreign currency translation adjustments		19			6			—			—
Plan assets at fair value at end of year		718			597			—			—
Funded status		(498	)		(439	)		(101	)		(88	)

Net amount recognized in the consolidated balance sheets consisted of the following:

	Pension Benefits						Other Long-Term Benefits
	December 31, 2020			December 31, 2019			December 31, 2020			December 31, 2019
Non-current assets		4			4			—			—
Current liabilities		(9	)		(10	)		(4	)		(7	)
Long-term liabilities		(493	)		(433	)		(97	)		(81	)
Net amount recognized		(498	)		(439	)		(101	)		(88	)

Accumulated Other Comprehensive Income (Loss) Before Tax Effects

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

	Actuarial (gains)/losses			Prior service cost			Total
Accumulated other comprehensive loss as at    December 31, 2018		152			3			155
Net amount generated/arising in current year		57			1			58
Amortization		(13	)		(1	)		(14	)
Foreign currency translation adjustment		1			—			1
Accumulated other comprehensive loss as at    December 31, 2019		197			3			200
Net amount generated/arising in current year		21			1			22
Amortization		(13	)		(1	)		(14	)
Foreign currency translation adjustment		11			—			11
Accumulated other comprehensive loss as at    December 31, 2020		216			3			219

Schedule of Accumulated Benefit Obligations

The accumulated benefit obligations were as follows:

	Pension Benefits				Other Long-Term Benefits
	December 31, 2020		December 31, 2019		December 31, 2020		December 31, 2019
Accumulated benefit obligations		1,053		896		83		74

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, 2020			Year ended December 31, 2019			Year ended December 31, 2018			Year ended December 31, 2020		Year ended December 31, 2019		Year ended December 31, 2018
Service cost		31			27			27			11		5		6
Interest cost		21			24			24			1		1		1
Expected return on plan assets		(23	)		(22	)		(23	)		—		—		—
Amortization of actuarial net loss    (gain)		12			10			8			3		7		1
Amortization of prior service cost		1			1			1			—		—		—
Effect of settlement		1			3			—			—		—		—
Effect of curtailment		—			—			1			—		—		—
Net periodic benefit cost		43			43			38			15		13		8

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	2020			2019
Discount rate		1.45	%		1.95	%
Salary increase rate		2.43	%		2.48	%
Expected long-term rate of return on funds for    the pension expense of the following year		3.44	%		4.04	%

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	2020			2019			2018
Discount rate		1.95	%		2.75	%		2.54	%
Salary increase rate		2.48	%		2.32	%		2.37	%
Expected long-term rate of return on funds for    the pension expense of the year		4.04	%		4.16	%		4.23	%

Pension Plan Asset Allocation

The Company’s pension plan asset allocation at December 31, 2020 and at December 31, 2019 is as follows:

	Percentage of Plan Assets at December
Asset Category	2020			2019
Cash and cash equivalents		1	%		1	%
Equity securities		23	%		24	%
Government debt securities		12	%		12	%
Corporate debt securities		15	%		16	%
Investments in funds(a)		21	%		21	%
Real estate		2	%		2	%
Other (mainly insurance assets – contracts and    reserves)		26	%		24	%
Total		100	%		100	%

^(a) As at December 31, 2020, investments in funds were composed of commingled and multi-strategy funds invested in diversified portfolios of fixed income (72%) - mainly corporate bonds, equity (13%), other instruments (15%).  As at December 31, 2019, investments in funds were composed of commingled and multi-strategy funds invested in diversified portfolios of corporate bonds (37%), government bonds (32%), equity (15%) and other instruments (16%).

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, 2020 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		4		4		—		—
Equity securities		167		2		165		—
Government debt securities		86		—		86		—
Corporate debt securities		105		—		81		24
Investment funds		153		3		150		—
Real estate		11		—		11		—
Other (mainly insurance assets –    contracts and reserves)		192		—		54		138
TOTAL		718		9		547		162

The Company’s detailed pension plan asset allocation including the fair-value measurements of those plan assets as at December 31, 2019 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		5		5		—		—
Equity securities		144		1		143		—
Government debt securities		74		—		74		—
Corporate debt securities		95		—		83		12
Investment funds		127		1		126		—
Real estate		10		—		10		—
Other (mainly insurance assets –    contracts and reserves)		142		—		41		101
TOTAL		597		7		477		113

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, 2020 and December 31, 2020 is presented as follows:

	Fair Value Measurements using Significant Unobservable Inputs (Level 3)
January 1, 2020		113
Contributions (employer and employee)		14
Actual return on plan assets		2
Net benefit payments (a)		11
Settlements		—
Transfer in Level 3		10
Foreign currency translation adjustment		12
December 31, 2020		162

^{(a) 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, 2019 and December 31, 2019 is presented as follows:

	Fair Value Measurements using Significant Unobservable Inputs (Level 3)
January 1, 2019		117
Contributions (employer and employee)		11
Actual return on plan assets		(1	)
Net benefit payments (a)		9
Settlements		(34	)
Transfer in Level 3		11
December 31, 2019		113

^{(a) 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 at December 31, 2020 are as follows:

Years	Pension Benefits		Other Long-term Benefits
2021		38		5
2022		30		5
2023		40		6
2024		51		9
2025		56		9
From 2026 to 2030		298		49