Equity Investment (Summary of Investment in Joint Venture, Income Statement Data) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Schedule of Equity Method Investments [Line Items]
Net sales	$ 310.2	$ 282.6
Gross profit	112.1	102.2
Net earnings	47.3	44.4
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] | Partnership Interest Member
Schedule of Equity Method Investments [Line Items]
Net sales	109.5	110.4
Gross profit	62.3	54.8
Net earnings	$ 43.8	$ 38.2