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Employee Benefits - Cash Flows (Details) $ in Millions | Dec. 31, 2023 USD ($)
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Pension Benefits |
Defined Benefit Plan Disclosure [Line Items] |
Expected contributions to the plans during the next year | $ 13.1
2024 | 207.0
2025 | 199.6
2026 | 202.2
2027 | 193.9
2028 | 188.8
2029 through 2033 | 847.4
OPEB Benefits |
Defined Benefit Plan Disclosure [Line Items] |
Expected contributions to the plans during the next year | 2.2
2024 | 34.3
2025 | 34.4
2026 | 34.9
2027 | 35.4
2028 | 35.5
2029 through 2033 | $ 175.3

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