Investments in Unconsolidated Affiliates (Summary of Investment in Joint Venture, Income Statement Data) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Schedule of Equity Method Investments [Line Items]
Net sales	$ 326.3	$ 310.2
Gross profit	124.3	112.1
Net earnings	59.9	47.3
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] | Partnership Interest Member
Schedule of Equity Method Investments [Line Items]
Net sales	125.8	109.5
Gross profit	76.7	62.3
Net earnings	$ 57.0	$ 43.8