Business Combinations - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions	Jan. 31, 2022	Jul. 21, 2021	Jan. 31, 2021	Jun. 30, 2020	Jan. 31, 2020
Business Acquisition [Line Items]
Acquired customer contract asset	$ 587		$ 477
Goodwill	$ 47,937		$ 26,318		$ 25,134
Slack
Business Acquisition [Line Items]
Cash and cash equivalents		$ 1,508
Accounts receivable		97
Acquired customer contract asset		70
Operating lease right-of-use assets		208
Other assets		405
Goodwill		21,161
Intangible assets		6,350
Accounts payable, accrued expenses and other liabilities		(186)
Unearned revenue		(382)
Slack Convertible Notes (see Note 9)		(1,339)
Operating lease liabilities		(283)
Deferred tax liability		(541)
Net assets acquired		$ 27,068
Vlocity
Business Acquisition [Line Items]
Cash and cash equivalents				$ 12
Accounts receivable				22
Other assets				15
Goodwill				1,024
Intangible assets				473
Accounts payable, accrued expenses and other liabilities				(35)
Unearned revenue				(64)
Deferred tax liability				(67)
Net assets acquired				$ 1,380