Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions		3 Months Ended
		Oct. 31, 2015	Oct. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance, net of tax		$ (162.0)	$ (45.8)
Other comprehensive (loss) income before reclassifications and tax		(20.9)	(38.0)
Tax benefit (expense)		3.8	(1.2)
Other comprehensive (loss) income before reclassifications, net of tax		(17.1)	(39.2)
Ending Balance, net of tax		(174.2)
Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Tax benefit (expense)		(2.3)	0.3
Reclassifications, before tax	[1]	7.2	2.0
Reclassifications, net of tax		4.9	2.3
Other comprehensive (loss) income, net of tax		(12.2)	(36.9)
Ending Balance, net of tax		(174.2)	(82.7)
Foreign Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance, net of tax	[2]	(70.8)	48.3
Other comprehensive (loss) income before reclassifications and tax	[2]	(10.6)	(42.8)
Tax benefit (expense)	[2]	0.0	0.0
Other comprehensive (loss) income before reclassifications, net of tax	[2]	(10.6)	(42.8)
Foreign Currency Translation Adjustment [Member] | Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Tax benefit (expense)	[2]	0.0	0.0
Reclassifications, before tax	[2]	0.0	0.0
Reclassifications, net of tax	[2]	0.0	0.0
Other comprehensive (loss) income, net of tax	[2]	(10.6)	(42.8)
Ending Balance, net of tax	[2]	(81.4)	5.5
Pension Benefits [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance, net of tax		(90.6)	(94.0)
Other comprehensive (loss) income before reclassifications and tax		(9.1)	3.2
Tax benefit (expense)		3.4	(0.6)
Other comprehensive (loss) income before reclassifications, net of tax		(5.7)	2.6
Pension Benefits [Member] | Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Tax benefit (expense)		(2.2)	0.3
Reclassifications, before tax		6.9	2.0
Reclassifications, net of tax	[3]	4.7	2.3
Other comprehensive (loss) income, net of tax		(1.0)	4.9
Ending Balance, net of tax		(91.6)	(89.1)
Derivative Financial Instruments [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance, net of tax		(0.6)	(0.1)
Other comprehensive (loss) income before reclassifications and tax		(1.2)	1.6
Tax benefit (expense)		0.4	(0.6)
Other comprehensive (loss) income before reclassifications, net of tax		(0.8)	1.0
Derivative Financial Instruments [Member] | Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Tax benefit (expense)		(0.1)	0.0
Reclassifications, before tax		0.3	0.0
Reclassifications, net of tax	[4]	0.2	0.0
Other comprehensive (loss) income, net of tax		(0.6)	1.0
Ending Balance, net of tax		$ (1.2)	$ 0.9

[1] Reclassification adjustments out of accumulated other comprehensive income for the three months ended October 31, 2015 and 2014, were not material.

[2] Taxes are not provided on cumulative translation adjustments as substantially all translation adjustments relate to earnings that are intended to be indefinitely reinvested outside the U.S.

[3] Primarily includes net amortization of prior service costs and actuarial losses included in net periodic benefit cost (see Note K) that were reclassified from accumulated other comprehensive loss to operating expenses or cost of sales.

[4] Relates to foreign currency cash flow hedges that were reclassified from accumulated other comprehensive loss to other income, net (see Note L).