Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net earnings	$ 239.7	$ 238.9	$ 450.3	$ 441.5
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments (net of tax of $0.0 in 2021 and 2020)	6.8	10.5	2.4	(14.5)
Comprehensive income	$ 246.5	$ 249.4	$ 452.7	$ 427.0