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Pension Plans and Postretirement Benefits - Cash Flows (Detail)
$ in Thousands
Dec. 31, 2021
USD ($)
UNITED STATES | Pension Plan  
Expected employer contributions to trusts of defined benefit plans:  
Expected benefit payments, 2020 $ 0
Expected benefit payments:  
Expected benefit payments, 2020 61,599
Expected benefit payments, 2021 63,669
Expected benefit payments, 2022 65,271
Expected benefit payments, 2023 66,406
Expected benefit payments, 2024 67,253
Expected benefit payments, 2025-2029 337,288
UNITED STATES | Other Benefits  
Expected employer contributions to trusts of defined benefit plans:  
Expected benefit payments, 2020 90
Expected benefit payments:  
Expected benefit payments, 2020 2,924
Expected benefit payments, 2021 2,914
Expected benefit payments, 2022 2,959
Expected benefit payments, 2023 2,914
Expected benefit payments, 2024 2,855
Expected benefit payments, 2025-2029 12,881
CANADA  
Expected employer contributions to trusts of defined benefit plans:  
Expected benefit payments, 2020 10,579
CANADA | Pension Plan  
Expected benefit payments:  
Expected benefit payments, 2020 3,588
Expected benefit payments, 2021 3,802
Expected benefit payments, 2022 4,009
Expected benefit payments, 2023 4,212
Expected benefit payments, 2024 4,390
Expected benefit payments, 2025-2029 24,724
CANADA | Other Benefits  
Expected benefit payments:  
Expected benefit payments, 2020 526
Expected benefit payments, 2021 547
Expected benefit payments, 2022 557
Expected benefit payments, 2023 586
Expected benefit payments, 2024 639
Expected benefit payments, 2025-2029 $ 3,404