Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net earnings	$ 238.9	$ 204.6	$ 441.5	$ 398.7
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments (net of tax of $0.0 in 2020 and 2019)	10.5	1.7	(14.5)	5.4
Comprehensive income	$ 249.4	$ 206.3	$ 427.0	$ 404.1