Leases - Lease Costs and Cash Flow Information (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease cost	$ 23	$ 25
Variable lease cost	5	5
Cash paid for operating leases included in operating cash flows	34	30
Non-cash operating lease liabilities arising from obtaining operating lease right-of-use assets	23	5
Variable lease payments	5	5
Cost of subscription and maintenance revenue
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease cost	2	2
Variable lease cost	0	0
Cost of other revenue
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease cost	1	0
Variable lease cost	0	0
Marketing and sales
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease cost	10	11
Variable lease cost	2	2
Research and development
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease cost	7	8
Variable lease cost	2	2
General and administrative
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease cost	3	4
Variable lease cost	$ 1	$ 1