Debt - Long Term Debt (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024	Mar. 10, 2022	Feb. 15, 2022
Debt Instrument [Line Items]
Non-Current:	$ 942.6	$ 1,391.6
Senior Notes | Senior Notes, 4.35 Percent Due February 15, 2025
Debt Instrument [Line Items]
Current:	$ 0.0	449.9
Stated interest rate	4.35%
Senior Notes | Senior Notes, 2.400 Percent Due September 30, 2030
Debt Instrument [Line Items]
Non-Current:	$ 397.7	397.5
Stated interest rate	2.40%
Senior Notes | Senior Notes, 3.800 Percent Due February 23, 2033
Debt Instrument [Line Items]
Non-Current:	$ 396.7	396.5		$ 395.1
Stated interest rate	3.80%
Junior Debt | 5.875% Fixed-Rate Reset Junior Subordinated Debentures due 2062
Debt Instrument [Line Items]
Non-Current:	$ 148.2	$ 147.7	$ 144.7
Stated interest rate	5.875%