Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2016	Oct. 31, 2015	Jul. 31, 2015	Apr. 30, 2015	Jan. 31, 2015	Oct. 31, 2014	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2015
Statement of Comprehensive Income [Abstract]
Net earnings	$ 68.2	$ 60.1	$ 46.5	$ 58.0	$ 59.5	$ 54.8	$ 38.0	$ 38.5	$ 232.8	$ 190.8	$ 208.1
Other comprehensive income (loss)
Foreign currency translation income (loss)									30.5	(18.5)	(119.1)
Pension liability adjustment, net of deferred taxes of $(11.2), $14.4 and $(0.2), respectively									20.7	(25.2)	3.4
(Loss) gain on hedging derivatives, net of deferred taxes of $1.2, $(0.1) and $0.4, respectively									(2.6)	0.1	(0.5)
Net other comprehensive income (loss)									48.6	(43.6)	(116.2)
Comprehensive income									$ 281.4	$ 147.2	$ 91.9