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Post-Employment and Other Long-Term Employees Benefits - Changes in Benefit Obligation and Plan Assets (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Change in plan assets: |  |  |
Plan assets at fair value at beginning of year | $ 565 |  |
Foreign currency translation | 0 | $ 0 |
Plan assets at fair value at end of year | 654 | 565 |
Pension Benefits |  |  |
Change in benefit obligation: |  |  |
Benefit obligation at beginning of year | 886 | 1,165 |
Service cost | 28 | 33 | $ 36
Interest cost | 35 | 27 | 21
Employee contributions | 5 | 4 |
Plan amendments | (1) | 0 |
Benefits paid | (18) | (22) |
Effect of settlement | (1) | (14) |
Actuarial (gain) loss | 39 | (260) |
Foreign currency translation | 35 | (47) |
Benefit obligation at end of year | 1,008 | 886 | 1,165
Change in plan assets: |  |  |
Plan assets at fair value at beginning of year | 567 | 743 |
Actual return on plan assets | 38 | (157) |
Employer contributions | 26 | 25 |
Employee contributions | 5 | 4 |
Benefits paid | (4) | (9) |
Effect of settlement | (1) | (14) |
Business combination | 0 | 0 |
Foreign currency translation | (23) | 25 |
Plan assets at fair value at end of year | 654 | 567 | 743
Funded status | (354) | (319) |
Net amount recognized in the balance sheet consisted of the following: |  |  |
Other investments and other non-current assets | 15 | 9 |
Other payables and accrued liabilities | (15) | (11) |
Other non-current liabilities | 0 | 0 |
Post-employment benefit obligations | (354) | (317) |
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position, Total | (354) | (319) |
Other Long-Term Benefits |  |  |
Change in benefit obligation: |  |  |
Benefit obligation at beginning of year | 86 | 94 |
Service cost | 17 | 17 | 13
Interest cost | 3 | 1 | 1
Employee contributions | 0 | 0 |
Plan amendments | 0 | 0 |
Benefits paid | (9) | (6) |
Effect of settlement | 0 | 0 |
Actuarial (gain) loss | (2) | (15) |
Foreign currency translation | 4 | (5) |
Benefit obligation at end of year | 99 | 86 | $ 94
Change in plan assets: |  |  |
Plan assets at fair value at beginning of year | 0 |  |
Plan assets at fair value at end of year | 0 | 0 |
Funded status | (99) | (86) |
Net amount recognized in the balance sheet consisted of the following: |  |  |
Other investments and other non-current assets | 0 | 0 |
Other payables and accrued liabilities | (7) | (5) |
Other non-current liabilities | (92) | (81) |
Post-employment benefit obligations | 0 | 0 |
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position, Total | $ (99) | $ (86) |

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- Definition Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(4) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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