Debt and Credit Arrangements - Debt, Credit Facilities, Uncommitted Lines of Credit Narrative (Details)	3 Months Ended	9 Months Ended
	Sep. 30, 2025 USD ($)	Sep. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)
Debt Instrument [Line Items]
Total long-term debt	$ 2,751,900,000	$ 2,751,900,000	$ 2,702,000,000
Credit Agreement | Line of Credit
Debt Instrument [Line Items]
Leverage ratio	3.50	3.50
Leverage ratio, minimum		4.00
Purchase price	$ 200,000,000.0	$ 200,000,000.0
Committed credit facility
Debt Instrument [Line Items]
Maximum borrowing capacity	1,500,000,000	1,500,000,000
Additional borrowing capacity	250,000,000.0	250,000,000.0
Letters of credit	50,000,000.0	50,000,000.0
Line of credit	0	0
Letters of credit outstanding, amount	9,100,000	9,100,000
Remaining borrowing capacity	1,490,900,000	1,490,900,000
Uncommitted credit facility
Debt Instrument [Line Items]
Maximum borrowing capacity	676,700,000	676,700,000
Line of credit	$ 56,800,000	$ 56,800,000
Weighted average interest rate	7.40%
Average outstanding amount	$ 40,200,000