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Long-Term Employee Benefit Liabilities - Schedule of Company's Defined Benefit Pension Plans (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items] |  |
Non-current asset | $ (4) | $ (22)
Non-current liability | 729 | 677
Pension Plan, Defined Benefit [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Beginning of year | 659 | 633
Current service cost | 10 | 11
Interest cost | 17 | 20
Actuarial losses and changes in actuarial assumptions | 43 | 79
Benefits paid | (23) | (21)
Divestiture |  | (68)
Foreign exchange | 25 | 5
End of year | 731 | 659
Beginning of year | 478 | 406
Return on plan assets | 42 | 78
Employer contributions | 9 | 11
Benefits paid | (18) | (17)
Divestiture |  | (10)
Foreign exchange | 6 | 10
End of year | 517 | 478
Ending funded status– Plan deficit | 214 | 181
Non-current asset | (4) | (23)
Current liability | 2 | 1
Non-current liability | 216 | 203
Net amount | 214 | 181
Unrecognized actuarial losses | (158) | (141)
Current service cost | 10 | 11
Interest cost | 17 | 20
Return on plan assets | (21) | (19)
Actuarial losses | 5 | 4
Net periodic benefit cost | $ 11 | $ 16

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- Definition Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669686-108580 + Details
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- Definition Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 + Details
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