Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2023	Jan. 31, 2022	Jul. 31, 2022
Accumulated Other Comprehensive Income (Loss), Net of Tax
Beginning balance	$ 1,154.8	$ 1,115.9	$ 1,133.2	$ 1,137.1	$ 1,137.1
Other comprehensive income (loss) before reclassifications and tax	61.2	(17.9)	25.6	(27.2)
Tax benefit (expense)	1.0	0.2	(0.1)	0.0
Other comprehensive income (loss) before reclassifications, net of tax	62.2	(17.7)	25.5	(27.2)
Reclassifications, before tax	3.7	(3.8)	0.3	(6.9)
Tax (expense) benefit	1.2	(0.8)	0.2	(1.6)
Reclassifications, net of tax	(2.5)	3.0	(0.1)	5.3
Net other comprehensive income (loss)	59.7	(14.7)	25.4	(21.9)
Ending balance	1,194.2	1,116.8	1,194.2	1,116.8	1,133.2
Total
Accumulated Other Comprehensive Income (Loss), Net of Tax
Beginning balance	(239.9)	(125.4)	(205.6)	(118.2)	(118.2)
Net other comprehensive income (loss)	59.7	(14.7)	25.4	(21.9)
Ending balance	(180.2)	(140.1)	(180.2)	(140.1)	(205.6)
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax
Beginning balance	(183.7)	(54.5)	(143.6)	(44.0)	(44.0)
Other comprehensive income (loss) before reclassifications and tax	65.3	(17.1)	25.2	(27.6)
Tax benefit (expense)	0.0	0.0	0.0	0.0
Other comprehensive income (loss) before reclassifications, net of tax	65.3	(17.1)	25.2	(27.6)
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 income (loss)	65.3	(17.1)	25.2	(27.6)
Ending balance	(118.4)	(71.6)	(118.4)	(71.6)	(143.6)
Pension Benefits
Accumulated Other Comprehensive Income (Loss), Net of Tax
Beginning balance	(66.3)	(72.7)	(67.5)	(74.7)	(74.7)
Other comprehensive income (loss) before reclassifications and tax	0.0	(1.7)	0.0	(1.7)
Tax benefit (expense)	0.0	0.4	0.0	0.4
Other comprehensive income (loss) before reclassifications, net of tax	0.0	(1.3)	0.0	(1.3)
Reclassifications, before tax	1.0	(4.3)	(0.6)	(6.8)
Tax (expense) benefit	0.3	(1.0)	(0.1)	(1.5)
Reclassifications, net of tax	(0.7)	3.3	0.5	5.3
Net other comprehensive income (loss)	(0.7)	2.0	0.5	4.0
Ending balance	(67.0)	(70.7)	(67.0)	(70.7)	(67.5)
Pension Benefits | Scenario, Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax
Other comprehensive income (loss) before reclassifications and tax		(1.7)			1.7
Reclassifications, before tax		1.2		1.2
Derivative Financial Instruments
Accumulated Other Comprehensive Income (Loss), Net of Tax
Beginning balance	10.1	1.8	5.5	0.5	0.5
Other comprehensive income (loss) before reclassifications and tax	(4.1)	0.9	0.4	2.1
Tax benefit (expense)	1.0	(0.2)	(0.1)	(0.4)
Other comprehensive income (loss) before reclassifications, net of tax	(3.1)	0.7	0.3	1.7
Reclassifications, before tax	2.7	0.5	0.9	(0.1)
Tax (expense) benefit	0.9	0.2	0.3	(0.1)
Reclassifications, net of tax	(1.8)	(0.3)	(0.6)	0.0
Net other comprehensive income (loss)	(4.9)	0.4	(0.3)	1.7
Ending balance	5.2	2.2	5.2	2.2	$ 5.5
Accumulated Defined Benefit Plans Adjustment, Foreign Currency Translation Attributable To Parent | Scenario, Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax
Reclassifications, before tax	1.5	(1.2)	0.5	(1.7)
Net amortization of prior service cost and actuarial losses | Scenario, Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax
Other comprehensive income (loss) before reclassifications and tax	$ (0.5)	$ (1.9)	$ (1.1)	$ (3.9)