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Employee and Retiree Benefit Plans - Plans' Benefit Obligations and Fair Value of Assets and Statement of Funded Status (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Change in plan assets |  |  |
Beginning balance | $ 611,302 |  |
Ending balance | 450,944 | $ 611,302 |
Pension Benefits |  |  |
Change in benefit obligation |  |  |
Beginning balance | 939,380 | 981,467 |
Service cost | 7,875 | 8,199 | $ 7,967
Interest cost | 22,747 | 14,784 | 21,127
Participant contributions | 0 | 0 |
Actuarial loss (gain) | (238,407) | (24,440) |
Medicare Part D subsidy | 0 | 0 |
Exchange rate changes | (21,018) | (1,764) |
Benefits paid | (47,504) | (38,866) |
Plan amendments | 0 | 0 |
Ending balance | 663,073 | 939,380 | 981,467
Change in plan assets |  |  |
Beginning balance | 611,302 | 586,720 |
Actual return on plan assets | (133,395) | 33,687 |
Employer contributions | 41,145 | 31,607 |
Participant contributions | 0 | 0 |
Medicare Part D subsidy | 0 | 0 |
Exchange rate changes | (20,604) | (1,846) |
Benefits paid | (47,504) | (38,866) |
Ending balance | 450,944 | 611,302 | 586,720
Funded status and amounts recognized in the Consolidated Balance Sheets at December 31 |  |  |
Deferred charges and other assets | 3,584 | 5,535 |
Other accrued liabilities | (9,693) | (10,144) |
Deferred credits and other liabilities | (206,020) | (323,469) |
Funded status and net plan liability recognized at December 31 | (212,129) | (328,078) |
Other Postretirement Benefits |  |  |
Change in benefit obligation |  |  |
Beginning balance | 96,133 | 108,378 |
Service cost | 968 | 1,295 | 1,373
Interest cost | 2,211 | 2,071 | 2,626
Participant contributions | 2,283 | 2,648 |
Actuarial loss (gain) | (29,533) | (9,519) |
Medicare Part D subsidy | 331 | 300 |
Exchange rate changes | (20) | 3 |
Benefits paid | (4,694) | (4,041) |
Plan amendments | 0 | (5,002) |
Ending balance | 67,679 | 96,133 | 108,378
Change in plan assets |  |  |
Beginning balance | 0 | 0 |
Actual return on plan assets | 0 | 0 |
Employer contributions | 2,080 | 1,093 |
Participant contributions | 2,283 | 2,648 |
Medicare Part D subsidy | 331 | 300 |
Exchange rate changes | 0 | 0 |
Benefits paid | (4,694) | (4,041) |
Ending balance | 0 | 0 | $ 0
Funded status and amounts recognized in the Consolidated Balance Sheets at December 31 |  |  |
Deferred charges and other assets | 0 | 0 |
Other accrued liabilities | (4,830) | (4,867) |
Deferred credits and other liabilities | (62,849) | (91,266) |
Funded status and net plan liability recognized at December 31 | $ (67,679) | $ (96,133) |

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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 https://asc.fasb.org/extlink&oid=123447040&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 https://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 + Details
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