Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2018	Jan. 31, 2017
Statement of Comprehensive Income [Abstract]
Net (loss) earnings	$ (52.9)	$ 46.5	$ 8.0	$ 104.5
Other comprehensive income (loss):
Foreign currency translation income (loss)	55.5	(8.4)	50.4	(20.8)
Pension liability adjustment, net of deferred taxes of $(0.4), $(0.8), $(0.9) and $(1.8), respectively	0.2	1.3	1.0	3.7
(Loss) gain on hedging derivatives, net of deferred taxes of $0.3, $0.1, $(0.9) and $(0.4), respectively	(0.6)	(0.3)	1.7	0.7
Comprehensive income	$ 2.2	$ 39.1	$ 61.1	$ 88.1