Business and Summary of Significant Accounting Policies - Schedule of Segments (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
Revenue from External Customer [Line Items]
Total net revenue	$ 6,131.0	$ 5,497.0	$ 5,005.0
Amortization of developed technologies	85.0	48.0	58.0
Marketing and sales	2,000.0	1,823.0	1,745.0
Research and development	1,485.0	1,373.0	1,219.0
General and administrative	650.0	620.0	532.0
Amortization of purchased intangibles	49.0	42.0	40.0
Restructuring, other exit costs, and facility reductions	15.0	0.0	0.0
Stock-based compensation	686.0	703.0	660.0
Interest and other (income) expense, net	(30.0)	(8.0)	43.0
Provision for income taxes	272.0	230.0	123.0
Net income	1,112.0	906.0	823.0
Reportable Segment
Revenue from External Customer [Line Items]
Total net revenue	6,131.0	5,497.0	5,005.0
Cost of revenue	376.0	344.0	309.0
Cost of other revenue	67.0	68.0	67.0
Amortization of developed technologies	85.0	48.0	58.0
Marketing and sales	1,670.0	1,548.0	1,477.0
Research and development	1,181.0	1,065.0	953.0
General and administrative	541.0	524.0	443.0
Amortization of purchased intangibles	49.0	42.0	40.0
Restructuring, other exit costs, and facility reductions	15.0	0.0	0.0
New transaction model	107.0	27.0	9.0
Stock-based compensation	686.0	703.0	660.0
Interest and other (income) expense, net	(30.0)	(8.0)	43.0
Provision for income taxes	272.0	230.0	123.0
Net income	$ 1,112.0	$ 906.0	$ 823.0