Condensed Consolidated Statements of Comprehensive Income (unaudited) - 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	$ 219.2	$ 249.7	$ 459.5	$ 619.3
Other comprehensive income, net of tax:
Foreign currency translation adjustments	56.2	(28.6)	(72.0)	0.1
Total other comprehensive income (loss), net of tax	56.2	(28.6)	(72.0)	0.1
Comprehensive income	$ 275.4	$ 221.1	$ 387.5	$ 619.4