Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 965.5	$ (139.1)	$ (210.9)
Other comprehensive income (loss) before reclassifications	(11.4)	33.0
Pre-tax loss reclassified from accumulated other comprehensive income	22.0	(2.8)
Tax effects	(8.7)	4.2
Total other comprehensive income (loss)	1.9	34.4	(25.3)
Ending Balance	849.1	965.5	(139.1)
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(125.9)	(160.3)	(135.0)
Ending Balance	(124.0)	(125.9)	(160.3)
Net Unrealized Gains (Losses) on Derivative Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(24.1)	8.4
Other comprehensive income (loss) before reclassifications	39.4	(33.1)
Pre-tax loss reclassified from accumulated other comprehensive income	17.2	(4.4)
Tax effects	(8.3)	5.0
Total other comprehensive income (loss)	48.3	(32.5)
Ending Balance	24.2	(24.1)	8.4
Net Unrealized Gains (Losses) on Available for Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	6.4	4.7
Other comprehensive income (loss) before reclassifications	11.7	1.5
Pre-tax loss reclassified from accumulated other comprehensive income	0.1	0.1
Tax effects	0.0	0.1
Total other comprehensive income (loss)	11.8	1.7
Ending Balance	18.2	6.4	4.7
Defined Benefit Pension Components
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(21.3)	(22.8)
Other comprehensive income (loss) before reclassifications	0.7	0.3
Pre-tax loss reclassified from accumulated other comprehensive income	4.7	1.5
Tax effects	(0.7)	(0.3)
Total other comprehensive income (loss)	4.7	1.5
Ending Balance	(16.6)	(21.3)	(22.8)
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(86.9)	(150.6)
Other comprehensive income (loss) before reclassifications	(63.2)	64.3
Pre-tax loss reclassified from accumulated other comprehensive income	0.0	0.0
Tax effects	0.3	(0.6)
Total other comprehensive income (loss)	(62.9)	63.7
Ending Balance	$ (149.8)	$ (86.9)	$ (150.6)