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Pension and Other Post-Retirement Benefit Plans (Tables) | 12 Months Ended
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Dec. 31, 2023
Pension and Other Post-Retirement Benefit Plans |
Components of net periodic benefit cost (credit) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | U.S. and Non-U.S. Pension Benefits
​ | ​ | Year Ended December 31,
​ |  | 2023 |  | 2022 |  | 2021
​ | ​ | (in millions)
Interest cost | ​ | $ | 6 | ​ | $ | 4 | ​ | $ | 4
Expected return on plan assets | ​ |  | (5) | ​ |  | (5) | ​ |  | (5)
Amortization of actuarial losses | ​ |  | 0 | ​ |  | 1 | ​ |  | 1
​ | ​ | $ | 1 | ​ | $ | — | ​ | $ | —
Changes in benefit obligations and plan assets, and funded status of plans | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | U.S. and Non-U.S. Pension Benefits
​ |  | 2023 |  | 2022
​ | ​ | (in millions)
Change in benefit obligation: | ​ | ​ |  |  | ​ |
Benefit obligation, beginning of year | ​ | $ | 115 | ​ | $ | 154
Interest cost | ​ |  | 6 | ​ |  | 4
Benefits paid | ​ |  | (8) | ​ |  | (8)
Actuarial loss (gain) | ​ |  | 1 | ​ |  | (34)
Currency translation | ​ |  | 2 | ​ |  | (1)
Benefit obligation, end of year | ​ |  | 116 | ​ |  | 115
Change in plan assets: | ​ |  |  | ​ |  |
Fair value of plan assets, beginning of year | ​ |  | 84 | ​ |  | 106
Actual return on plan assets | ​ |  | 10 | ​ |  | (15)
Employer contributions | ​ |  | 3 | ​ |  | 1
Benefits paid | ​ |  | (8) | ​ |  | (8)
Fair value of plan assets, end of year | ​ |  | 89 | ​ |  | 84
Funded status of the plan and amounts recognized in the consolidated balance sheets | ​ | $ | (27) | ​ | $ | (31)
Defined benefit plan assets measured at fair value on a recurring basis | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2023 | ​ | December 31, 2022
​ |  | Level 1 |  | Level 2 |  | Total |  | Level 1 |  | Level 2 |  | Total
​ | ​ | (in millions)
U.S. and Non-U.S. Plans: | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |
Cash and cash equivalents | ​ | $ | 1 | ​ | $ | 39 | ​ | $ | 40 | ​ | $ | 13 | ​ | $ | — | ​ | $ | 13
Government debt securities | ​ |  | 3 | ​ |  | — | ​ |  | 3 | ​ |  | 2 | ​ |  | 13 | ​ |  | 15
Exchange traded funds | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 12 | ​ |  | — | ​ |  | 12
Mutual funds | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 20 | ​ |  | — | ​ |  | 20
Common stock | ​ |  | 46 | ​ |  | — | ​ |  | 46 | ​ |  | 24 | ​ |  | — | ​ |  | 24
​ | ​ | $ | 50 | ​ | $ | 39 | ​ | $ | 89 | ​ | $ | 71 | ​ | $ | 13 | ​ | $ | 84
​

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- Definition Pension, Other Post-Retirement Benefits and Employee Benefit Plans. [Abstract] + References No definition available. + Details
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- Definition Schedule of fair value of defined benefit plan asset [Table Text Block] + References No definition available. + Details
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- Definition Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 20 -Topic 715 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-17 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-3 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-4 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-2 + Details
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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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