Borrowing Arrangements Future Minimum Payments For Borrowings (Details) $ in Millions	Jan. 31, 2021 USD ($)
Debt Disclosure [Abstract]
2022	$ 0.0
2023	350.0
2024	0.0
2025	0.0
2026	300.0
Thereafter	1,000.0
Total principal outstanding	$ 1,650.0

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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