Employee Benefit Plans (Narrative) (Details) $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2025 USD ($)	Sep. 30, 2025 pension_plan	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($) pension_plan	Dec. 31, 2023 USD ($) pension_plan	Dec. 31, 2022 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Number of significant plans | pension_plan				2	3
Settlements			$ 110.6	$ 0.2	$ 0.0
Employer contributions			6.5	1.0	5.0
Net liability	$ 68.6		$ 68.6	$ 178.5	$ 194.6	$ 191.2
Pension benefit obligation (as a percent)			59.00%	85.00%	85.00%
Expected employer contributions	$ 2.0		$ 2.0
Defined contribution plan, cost			$ 14.9	$ 15.4	$ 14.2
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]			Other Operating Income (Expense), Net
Other Postretirement Benefits Plan | Bonds | Active Plans
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percent)	25.00%		25.00%
Other Postretirement Benefits Plan | Equity securities | Active Plans
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percent)	75.00%		75.00%
Frozen Plans
Defined Benefit Plan Disclosure [Line Items]
Number of significant plans | pension_plan				2
Settlements			$ 22.0	$ 0.7
Employer contributions	$ 6.0
Remaining net liability			$ 0.7	$ 4.2
Union-Sponsored Multi-Employer Defined Benefit Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Number of significant plans | pension_plan		1