SCHEDULE II: VALUATION AND QUALIFYING ACCOUNTS (Details) - Partner Program reserves - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at the Beginning of Year	$ 64.0	$ 60.4	$ 51.7
Additions Charged to Costs and Expenses or Revenues	623.0	491.9	453.7
Deductions	622.8	488.3	445.0
Balance at End of Year	$ 64.2	$ 64.0	$ 60.4