Business Combinations - Intangible Assets Acquired (Details) - USD ($) $ in Millions		1 Months Ended	12 Months Ended
	Jul. 21, 2021	Jun. 30, 2020	Jan. 31, 2022
Business Acquisition [Line Items]
Estimated useful lives (in years)			5 years 6 months
Developed technology
Business Acquisition [Line Items]
Estimated useful lives (in years)			3 years 8 months 12 days
Customer relationships
Business Acquisition [Line Items]
Estimated useful lives (in years)			6 years 7 months 6 days
Other purchased intangible assets
Business Acquisition [Line Items]
Estimated useful lives (in years)			5 years 6 months
Slack
Business Acquisition [Line Items]
Finite-lived intangible assets acquired	$ 6,350
Slack | Developed technology
Business Acquisition [Line Items]
Finite-lived intangible assets acquired	$ 2,360
Estimated useful lives (in years)	5 years
Slack | Customer relationships
Business Acquisition [Line Items]
Finite-lived intangible assets acquired	$ 3,690
Estimated useful lives (in years)	8 years
Slack | Other purchased intangible assets
Business Acquisition [Line Items]
Finite-lived intangible assets acquired	$ 300
Estimated useful lives (in years)	6 years
Vlocity
Business Acquisition [Line Items]
Finite-lived intangible assets acquired		$ 473
Vlocity | Developed technology
Business Acquisition [Line Items]
Finite-lived intangible assets acquired		$ 174
Estimated useful lives (in years)		4 years
Vlocity | Customer relationships
Business Acquisition [Line Items]
Finite-lived intangible assets acquired		$ 299
Estimated useful lives (in years)		8 years