Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net earnings	$ 134.2	$ 126.2
Other comprehensive income, net of tax:
Foreign currency translation adjustments (net of tax of $0.0 in 2017 and 2016)	2.9	13.7
Comprehensive income	$ 137.1	$ 139.9