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Credit Arrangements - Schedule of Long-term Debt (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024	Sep. 30, 2022	May 06, 2022	Oct. 26, 2020
Debt Instrument [Line Items]
Long-term debt	$ 838.8	$ 698.6
Long-term debt	838.8	698.6
Debt Instrument, Interest Rate, Stated Percentage					2.32%
Maximum borrowing capacity			$ 650.0
Medium-term Notes [Member] \| Term Loan Facility [Member]
Debt Instrument [Line Items]
Long-term debt	349.8	349.8
Debt Issuance Costs, Gross	1.2	1.4
Notes Payable, Other Payables \| Private Placement
Debt Instrument [Line Items]
Long-term debt	349.0	348.8
Debt Issuance Costs, Gross	$ 1.0	$ 1.2
Debt Instrument, Interest Rate, Stated Percentage	2.32%	2.32%
Revolving Credit Facility \| Line of Credit [Member] \| July 2019 Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term debt		$ 0.0
Revolving Credit Facility \| Line of Credit [Member] \| May 2022 Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt	$ 140.0
Maximum borrowing capacity				$ 450.0