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Pensions and Other Postretirement Benefit Plans (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Sep. 30, 2022 | Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Pension charges |  |  | $ 49,100 |
Reduction of unfunded pension liabilities |  |  | $ 6,200 |
Benefit obligation, employer contributions | $ 7,900 | $ 9,400 |  |
Pension plans |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Reduction of unfunded pension liabilities | (8,801) | (5,463) |  |
Benefit obligation | 83,730 | 230,790 |  | $ 245,800
Benefit obligation period increase (decrease) | (147,000) | (15,000) |  |
Benefit obligation, settlement | 91,600 |  |  |
Benefit obligation, net actuarial gain | 46,995 | 7,163 |  |
Other postretirement benefits |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Reduction of unfunded pension liabilities | (35,658) | (44,884) |  |
Benefit obligation | 35,658 | 44,884 |  | $ 47,977
Benefit obligation period increase (decrease) | (9,200) | (3,100) |  |
Benefit obligation, net actuarial gain | 6,658 | $ 995 |  |
United States |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Accrued postretirement liability | 34,800 |  |  |
Switzerland | Pension plans |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Benefit obligation | 2,900 |  |  |
Canada |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Accrued postretirement liability | $ 800 |  |  |

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- Definition Amount of liability, recognized in statement of financial position, for defined benefit pension plan. Excludes other postretirement benefit plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(15)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(15)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=123453770&loc=d3e1703-114919 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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