Leases - Maturities of Operating and Finance Lease Liabilities After Adoption of 842 (Details) $ in Millions	Jul. 31, 2020 USD ($)
Operating Lease Liabilities
Remainder of fiscal 2020	$ 11.3
Fiscal 2021	42.4
Fiscal 2022	35.0
Fiscal 2023	29.5
Fiscal 2024	24.0
Thereafter	61.4
Total lease payments	203.7
Less: imputed interest	25.4
Present value of lease liabilities	178.3
Finance Lease Liabilities
Remainder of fiscal 2020	1.0
Fiscal 2021	3.3
Fiscal 2022	1.7
Fiscal 2023	0.9
Fiscal 2024	0.0
Thereafter	0.0
Total lease payments	6.9
Less: imputed interest	1.0
Present value of lease liabilities	5.9
Total
Remainder of fiscal 2020	12.3
Fiscal 2021	45.7
Fiscal 2022	36.7
Fiscal 2023	30.4
Fiscal 2024	24.0
Thereafter	61.4
Total lease payments	210.5
Less: imputed interest	26.3
Present value of lease liabilities	$ 184.2