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Postretirement Health Care and Life Insurance Benefits - Estimated Future Benefit Payments (Details) - USD ($) $ in Millions | Jan. 01, 2023 | Dec. 31, 2022 | Jan. 01, 2022
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Defined Benefit Plan Disclosure [Line Items] |  |  |
Average remaining service period (in years) | 1 year 10 months 24 days |  | 2 years 10 months 24 days
Postretirement Health Care and Life Insurance Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
2023 |  | $ 23.1 |
2024 |  | 22.3 |
2025 |  | 21.1 |
2026 |  | 20.1 |
2027 |  | 18.9 |
Years 2028-2032 |  | $ 75.7 |
Average remaining service period (in years) | 13 years |  | 14 years
Postretirement Health Care and Life Insurance Benefits | Retirement Plan Amendment One |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Average remaining service period (in years) | 2 years 10 months 24 days |  | 3 years 10 months 24 days
Postretirement Health Care and Life Insurance Benefits | Retirement Plan Amendment Two |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Average remaining service period (in years) | 8 years 6 months |  | 9 years 6 months

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