Equity Investment (Summary of Investment in Joint Venture, Income Statement Data) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Schedule of Equity Method Investments [Line Items]
Net sales	$ 321.0	$ 280.0	$ 603.6	$ 531.9
Gross profit	117.9	104.9	220.1	192.4
Net earnings	52.2	55.1	96.6	90.5
WAVE [Member] | Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Schedule of Equity Method Investments [Line Items]
Net sales	129.0	108.7	239.4	207.3
Gross profit	61.3	64.6	116.1	123.5
Net earnings	$ 45.1	$ 49.5	$ 83.3	$ 94.1