Condensed Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Statement Of Income And Comprehensive Income [Abstract]
Net earnings	$ 27.6	$ 15.8	$ 72.0	$ 34.1
Other comprehensive income, net:
Foreign currency translation adjustments	5.0	0.8	3.3	5.9
Net unrealized gains on available-for-sale securities, net of taxes of ($0.4) and ($0.1) for the three months ended December 31, 2013 and 2012, respectively; and ($0.4) and ($0.3) for the six months ended December 31, 2013 and 2012, respectively	0.6	0.1	0.5	0.4
Pension and post-retirement liability adjustment, net of taxes of ($0.1) and zero for the three months ended December 31, 2013 and 2012, respectively; and ($0.1) and $0.4 for the six months ended December 31, 2013 and 2012, respectively			0.1	(0.6)
Total other comprehensive income, net	5.6	0.9	3.9	5.7
Comprehensive income	$ 33.2	$ 16.7	$ 75.9	$ 39.8