Leases - Lease Costs and Cash Flow Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease cost	$ 22	$ 25	$ 45	$ 50
Variable lease cost	3	5	8	10
Cash paid for operating leases included in operating cash flows			60	48
Non-cash operating lease liabilities arising from obtaining operating lease right-of-use assets			37	10
Variable lease payments			8	10
Cost of subscription and maintenance revenue
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease cost	2	2	4	4
Variable lease cost	1	1	1	1
Cost of other revenue
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease cost	1	1	2	1
Variable lease cost	0	0	0	0
Marketing and sales
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease cost	9	11	19	22
Variable lease cost	1	2	3	4
Research and development
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease cost	7	8	14	16
Variable lease cost	1	1	3	3
General and administrative
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease cost	3	3	6	7
Variable lease cost	$ 0	$ 1	$ 1	$ 2