Business Combination - Narrative (Details)		1 Months Ended	12 Months Ended
	Jan. 03, 2019 USD ($) $ / shares shares	Jan. 31, 2019 USD ($)	Jan. 31, 2020 USD ($)	Jan. 31, 2019 USD ($)
Business Acquisition [Line Items]
Stock issued in acquisition (in shares) | shares	111,304,700
Average remaining vesting period (in years)			9 months 18 days
Stock-based compensation			$ 20,900,000	$ 6,200,000
Goodwill acquired during period				552,835,000
Estimated useful life, benchmark period	7 years
Hortonworks, Inc
Business Acquisition [Line Items]
Consideration transferred	$ 1,200,000,000	$ 1,202,427,000
Transaction costs	$ 22,800,000
Share price (in usd per share) | $ / shares	$ 10.37
Share conversion ratio	1.305
Fair value of stock awards assumed	$ 63,500,000
Average remaining vesting period (in years)	1 year 6 months
Stock-based compensation				$ 13,100,000
Goodwill acquired during period	$ 552,800,000
Business acquisition, goodwill, expected tax deductible amount	$ 0
Stock options to purchase common stock | Hortonworks, Inc
Business Acquisition [Line Items]
Stock issued in acquisition (in shares) | shares	4,100,000
Performance Restricted Stock Units | Hortonworks, Inc
Business Acquisition [Line Items]
Stock issued in acquisition (in shares) | shares	900,000
Restricted stock awards
Business Acquisition [Line Items]
Average remaining vesting period (in years)			2 years 2 months 12 days
Restricted stock awards | Hortonworks, Inc
Business Acquisition [Line Items]
Stock issued in acquisition (in shares) | shares	9,000,000.0
Subscription
Business Acquisition [Line Items]
Goodwill acquired during period	$ 525,200,000
Services
Business Acquisition [Line Items]
Goodwill acquired during period	$ 27,600,000
Customer relationships | Hortonworks, Inc
Business Acquisition [Line Items]
Estimated useful life	10 years