Subsequent Events (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Feb. 29, 2020	Jul. 31, 2020	Jan. 31, 2020	Nov. 30, 2019	Sep. 30, 2019	Jan. 31, 2019
Subsequent Event [Line Items]
Strategic investments			$ 1,963			$ 1,302
Technology company in preferred stock financing
Subsequent Event [Line Items]
Strategic investments				$ 150	$ 300
Subsequent Event | Technology company in preferred stock financing
Subsequent Event [Line Items]
Strategic investments	$ 150
Subsequent Event | Cloud-Based Real-Time Personalization and Customer Data Platform
Subsequent Event [Line Items]
Consideration transferred	$ 100
Forecast | Subsequent Event | Vlocity, Inc
Subsequent Event [Line Items]
Consideration transferred		$ 1,330