Notes Payable and Long-Term Debt - Principal Components of Long-Term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Long-term debt less unamortized discounts and debt issuance costs	$ 1,210.4
Less current maturities	(1.2)	$ (0.5)
Long-term debt	1,200.4	1,199.1
3.3%, Senior Notes due 2027
Debt Instrument [Line Items]
Long-term debt less unamortized discounts and debt issuance costs	395.7
3.3%, Senior Notes due 2027 \| Senior Notes
Debt Instrument [Line Items]
Senior notes	400.0	400.0
3.7%, Senior Notes due 2032
Debt Instrument [Line Items]
Long-term debt less unamortized discounts and debt issuance costs	790.5
3.7%, Senior Notes due 2032 \| Senior Notes
Debt Instrument [Line Items]
Senior notes	800.0	800.0
Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Less unamortized discounts and debt issuance costs	(8.8)	(10.5)
Long-term debt less unamortized discounts and debt issuance costs	1,191.2	1,189.5
Finance Leases and Other Debt [Member] \| Finance Lease Obligations [Member]
Debt Instrument [Line Items]
Finance leases and other debt	$ 10.4	$ 10.1

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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