Business Combinations - Narrative (Details) - USD ($) shares in Millions			3 Months Ended	6 Months Ended	12 Months Ended
	Aug. 02, 2021	May 03, 2021	Jul. 31, 2021	Jul. 31, 2021	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Business Acquisition [Line Items]
Issuance of common stock and value of equity awards assumed in connection with business combination					$ 5,409,344,000	$ 0	$ 0
Options outstanding, aggregate intrinsic value					1,314,031,000	1,980,668,000
Goodwill					$ 5,401,343,000	$ 48,023,000
Developed technology
Business Acquisition [Line Items]
Weighted average useful life					4 years	3 years 1 month 6 days
Stock options
Business Acquisition [Line Items]
Vesting period					4 years
Auth0
Business Acquisition [Line Items]
Aggregate consideration		$ 5,671,022,000
Cash consideration		257,010,000
Cash consideration held back		$ 3,800,000
Cash consideration hold back period		1 year
Equity consideration (in shares)		19.2
Equity consideration held back (in shares)		1.1
Equity consideration held back		$ 294,600,000
Acquisition related costs				$ 29,000,000
Goodwill		5,290,100,000
Goodwill, expected tax deductible amount		0
Identifiable intangible assets acquired		334,300,000			$ 334,300,000
Auth0 | Developed technology
Business Acquisition [Line Items]
Identifiable intangible assets acquired		$ 172,000,000
Weighted average useful life		5 years
Auth0 | Common Stock
Business Acquisition [Line Items]
Issuance of common stock and value of equity awards assumed in connection with business combination		$ 5,175,623,000
Auth0 | Unvested restricted stock awards issued and outstanding
Business Acquisition [Line Items]
Number of shares granted in period		1.2
Vesting period		3 years
Fair value, unvested		$ 332,100,000
Auth0 | Stock options
Business Acquisition [Line Items]
Issuance of common stock and value of equity awards assumed in connection with business combination		238,400,000
Replacement equity awards issued, fair value		655,100,000
Options outstanding, aggregate intrinsic value		416,700,000
Auth0 | Restricted cash awards
Business Acquisition [Line Items]
Equity awards outstanding, aggregate intrinsic value		$ 13,500,000
atSpoke
Business Acquisition [Line Items]
Aggregate consideration	$ 79,300,000
Cash consideration held back	$ 13,400,000
Cash consideration hold back period	18 months
Acquisition related costs			$ 900,000
Goodwill	$ 63,200,000
Goodwill, expected tax deductible amount	0
Identifiable intangible assets acquired					$ 18,300,000
atSpoke | Developed technology
Business Acquisition [Line Items]
Identifiable intangible assets acquired	$ 18,300,000
Weighted average useful life	3 years