Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Apr. 30, 2022	Jan. 31, 2022	Apr. 30, 2021	Apr. 30, 2022	Apr. 30, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax
Beginning Balance	$ 1,116.8		$ 1,074.4	$ 1,137.1	$ 992.9
Other comprehensive (loss) income before reclassifications and tax	(47.0)		22.4	(74.2)	61.5
Tax benefit (expense)	1.2		(5.4)	1.2	(6.1)
Other comprehensive (loss) income before reclassifications, net of tax	(45.8)		17.0	(73.0)	55.4
Reclassifications, before tax	4.7		3.2	11.6	6.3
Tax (expense) benefit	(1.1)		(0.8)	(2.7)	(1.3)
Reclassifications, net of tax	3.6		2.4	8.9	5.0
Net other comprehensive (loss) income	(42.2)		19.4	(64.1)	60.4
Ending Balance	1,123.6	$ 1,116.8	1,153.4	1,123.6	1,153.4
Actuarial loss amortization	1.8		2.1	5.4	6.2
Scenario, Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax
Net other comprehensive (loss) income	7.6	1.7
Total
Accumulated Other Comprehensive Income (Loss), Net of Tax
Beginning Balance	(140.1)		(143.0)	(118.2)	(184.0)
Net other comprehensive (loss) income	(42.2)		19.4	(64.1)	60.4
Ending Balance	(182.3)	(140.1)	(123.6)	(182.3)	(123.6)
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax
Beginning Balance	(71.6)		(37.5)	(44.0)	(74.0)
Other comprehensive (loss) income before reclassifications and tax	(42.8)		(0.2)	(70.4)	36.3
Tax benefit (expense)	0.0		0.0	0.0	0.0
Other comprehensive (loss) income before reclassifications, net of tax	(42.8)		(0.2)	(70.4)	36.3
Reclassifications, before tax	0.0		0.0	0.0	0.0
Tax (expense) benefit	0.0		0.0	0.0	0.0
Reclassifications, net of tax	0.0		0.0	0.0	0.0
Net other comprehensive (loss) income	(42.8)		(0.2)	(70.4)	36.3
Ending Balance	(114.4)	(71.6)	(37.7)	(114.4)	(37.7)
Pension Benefits
Accumulated Other Comprehensive Income (Loss), Net of Tax
Beginning Balance	(70.7)		(103.9)	(74.7)	(110.0)
Other comprehensive (loss) income before reclassifications and tax	(7.6)		21.4	(9.3)	25.4
Tax benefit (expense)	2.0		(5.2)	2.4	(6.2)
Other comprehensive (loss) income before reclassifications, net of tax	(5.6)		16.2	(6.9)	19.2
Reclassifications, before tax	5.0		3.0	11.8	6.8
Tax (expense) benefit	(1.2)		(0.7)	(2.7)	(1.4)
Reclassifications, net of tax	3.8		2.3	9.1	5.4
Net other comprehensive (loss) income	(1.8)		18.5	2.2	24.6
Ending Balance	(72.5)	(70.7)	(85.4)	(72.5)	(85.4)
Pension Benefits | Scenario, Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax
Other comprehensive (loss) income before reclassifications and tax	7.6		21.4	9.3	25.4
Reclassifications, before tax	(1.1)		(1.1)	(2.3)	(1.9)
Net amortization of prior service cost and actuarial losses
Accumulated Other Comprehensive Income (Loss), Net of Tax
Reclassifications, before tax	3.9		1.9	9.5	4.9
Derivative Financial Instruments
Accumulated Other Comprehensive Income (Loss), Net of Tax
Beginning Balance	2.2		(1.6)	0.5	0.0
Other comprehensive (loss) income before reclassifications and tax	3.4		1.2	5.5	(0.2)
Tax benefit (expense)	(0.8)		(0.2)	(1.2)	0.1
Other comprehensive (loss) income before reclassifications, net of tax	2.6		1.0	4.3	(0.1)
Reclassifications, before tax	(0.3)		0.2	(0.2)	(0.5)
Tax (expense) benefit	0.1		(0.1)	0.0	0.1
Reclassifications, net of tax	(0.2)		0.1	(0.2)	(0.4)
Net other comprehensive (loss) income	2.4		1.1	4.1	(0.5)
Ending Balance	$ 4.6	$ 2.2	$ (0.5)	$ 4.6	$ (0.5)