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Postretirement Health Care and Life Insurance Benefits - Estimated Future Benefit Payments (Details) - Postretirement Health Care and Life Insurance Benefits $ in Millions	Dec. 31, 2025 USD ($)
Defined Benefit Plan Disclosure [Line Items]
2026	$ 16.2
2027	15.4
2028	14.7
2029	13.7
2030	12.9
Years 2031-2035	$ 51.7

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