Annual report pursuant to Section 13 and 15(d)

Pension And Other Postretirement Benefit Programs - Expected Future Benefit Payments (Details)

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Pension And Other Postretirement Benefit Programs - Expected Future Benefit Payments (Details)
$ in Millions
Dec. 31, 2019
USD ($)
Retiree Health and Life Insurance Plans  
U.S. Pension Benefits, Canadian Pension Benefits, and Retiree Health and Life Insurance Benefits, Gross  
2020 $ 5.6
2021 5.3
2022 5.0
2023 4.6
2024 4.3
2025-2029 17.5
U.S. Pension Plan | Pension Plan  
U.S. Pension Benefits, Canadian Pension Benefits, and Retiree Health and Life Insurance Benefits, Gross  
2020 19.1
2021 19.1
2022 20.1
2023 21.0
2024 21.6
2025-2029 114.4
Canadian Pension Plan | Pension Plan  
U.S. Pension Benefits, Canadian Pension Benefits, and Retiree Health and Life Insurance Benefits, Gross  
2020 1.4
2021 1.3
2022 1.2
2023 1.2
2024 1.1
2025-2029 $ 5.3