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Retirement Plans and Post Retirement Benefits (Tables) | 12 Months Ended
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Dec. 31, 2023
Retirement Benefits [Abstract] |
Schedule of Net Funded Status and Assumptions Used in Calculating Benefit Obligation [Table Text Block] | The projected benefit obligation is the actuarial present value of benefits attributable to employee service rendered to date, including the effects of estimated salary increases. The following table details information regarding our pension plans at December 31, 2023 and 2022 (dollars in millions):
| 2023 |  | 2022
Change in benefit obligation: |  |  |
Beginning of year balance | $ | 3 |  |  | $ | 301 |
Service cost | 1 |  |  | 3 |
Interest cost | — |  |  | 7 |
Actuarial (gains) losses, net | — |  |  | (47) |
Foreign exchange rate changes | — |  |  | (2) |
Benefits paid | — |  |  | (13) |
Pension settlements | (2) |  |  | (247) |
End of year balance | $ | 2 |  |  | $ | 3 |
Change in assets (fair value): |  |  |
Beginning of year balance | $ | 6 |  |  | $ | 296 |
Actual return on plan assets | (1) |  |  | (33) |
Employer contribution | (2) |  |  | 5 |
Foreign exchange rate changes | — |  |  | (2) |
Benefits paid | — |  |  | (13) |
Pension settlements | (2) |  |  | (247) |
End of year balance | $ | — |  |  | $ | 6 |
Plan assets less than benefit obligations | $ | (2) |  |  | $ | 2 |
Amounts included in the balance sheet: |  |  |
Non-current pension assets, included in “Other assets” | $ | — |  |  | $ | 4 |
Current pension liabilities, included in “Accounts payable and accrued liabilities” | — |  |  | — |
Non-current pension liabilities, included in “Other long-term liabilities” | (2) |  |  | (2) |
Net amount recognized | $ | (2) |  |  | $ | 2 |
Amounts in accumulated comprehensive loss: |  |  |
Net actuarial loss | $ | (1) |  |  | $ | (1) |
Prior service costs | — |  |  | (6) |
Total pre-tax amounts in accumulated comprehensive loss | $ | (1) |  |  | $ | (6) |
Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] | The changes recognized in other comprehensive loss were as follows (dollars in millions):
| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
Pension settlements, net of tax | $ | 4 |  |  | $ | 62 |  |  | $ | 2 |
Net actuarial gain (loss) and prior service (cost) arising during the period, net of tax | — |  |  | 5 |  |  | (1) |
Amortization of actuarial loss, prior service cost, net of tax | — |  |  | 4 |  |  | 5 |
Total amounts recognized in other comprehensive income | $ | 4 |  |  | $ | 71 |  |  | $ | 5 |
Defined Benefit Plan, Assumptions [Table Text Block] | Weighted-average assumptions used to calculate our benefit obligations at December 31, 2022 was as follows:
|  |  | 2022
Discount rate: |  |  |
U.S. |  |  | 2.3 | %
Canada |  |  | 3.8 | %
Rate of compensation increase: |  |  |
U.S. |  |  | NA
Canada |  |  | NA
Schedule of Net Benefit Costs [Table Text Block] | The following table sets forth the net periodic pension cost for our defined benefit pension plans. The components of our net periodic pension costs consisted of the following (dollars in millions):
| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
Service cost | $ | 1 |  |  | $ | 3 |  |  | $ | 1 |
Other components of net periodic pension cost: |  |  |  |  |
Interest cost | — |  |  | 7 |  |  | 7 |
Expected return on plan assets | — |  |  | (7) |  |  | (13) |
Amortization of prior service cost and net transition asset | — |  |  | 1 |  |  | 1 |
Amortization of net actuarial loss | — |  |  | 5 |  |  | 6 |
Net periodic pension cost before loss due to settlement | 1 |  |  | 8 |  |  | 2 |
Loss due to pension settlement | 4 |  |  | 82 |  |  | 2 |
Total net periodic pension cost | $ | 4 |  |  | $ | 91 |  |  | $ | 4 |
Net periodic pension cost included in cost of sales | $ | — |  |  | $ | — |  |  | $ | — |
Net periodic pension cost included in selling, general, and administrative expenses | 1 |  |  | 3 |  |  | 1 |
Net periodic pension cost included in other non-operating items | 4 |  |  | 88 |  |  | 3 |
| $ | 4 |  |  | $ | 91 |  |  | $ | 4 |
Weighted average assumptions used to calculate our net periodic pension costs for the years ended December 31, 2022, and 2021 were as follows:
|  |  | 2022 |  | 2021
Discount rate: |  |  |  |  |
U.S. |  |  | 2.6 | % |  | 2.3 | %
Canada |  |  | 2.6 | % |  | 2.3 | %
Expected return on plan assets: |  |  |  |  |
U.S. |  |  | 3.0 | % |  | 5.3 | %
Canada |  |  | 2.0 | % |  | 2.3 | %
Rate of compensation increase: |  |  |  |  |
U.S. |  |  | NA |  | NA
Canada |  |  | NA |  | NA
Schedule of Allocation of Plan Assets [Table Text Block] | The fair value of our pension plan assets was $6 million as of December 31, 2022, respectively, based on Level 1 inputs. Refer to "Note 1 - Summary of Significant Accounting Policies" for further detail on the level of inputs as defined.
Schedule of benefit obligation by plan category [Table Text Block] | Benefit obligations by plan category are as follows (dollars in millions):
| 2023
| U.S. |  | Canada |  | Total
Fair value of plan assets | $ | — |  |  | $ | — |  |  | $ | — |
Benefit obligation | 1 |  |  | 1 |  |  | 2 |
Funded Status | $ | (1) |  |  | $ | (1) |  |  | $ | (2) |
| 2022
| U.S. |  | Canada |  | Total
Fair value of plan assets | $ | 1 |  |  | $ | 4 |  |  | $ | 6 |
Benefit obligation | 2 |  |  | 2 |  |  | 3 |
Funded Status | $ | — |  |  | $ | 3 |  |  | $ | 2 |

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- Definition Tabular disclosure of the major categories of plan assets of pension plans and/or other employee benefit plans. This information may include, but is not limited to, the target allocation of plan assets, the fair value of each major category of plan assets, and the level within the fair value hierarchy in which the fair value measurements fall. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (d)(5) -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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