Revenues - Disaggregation of Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Disaggregation of Revenue [Line Items]
Total revenues	$ 26,492	$ 21,252	$ 17,098
Americas
Disaggregation of Revenue [Line Items]
Total revenues	17,983	14,736	12,051
Europe
Disaggregation of Revenue [Line Items]
Total revenues	6,016	4,501	3,430
Asia Pacific
Disaggregation of Revenue [Line Items]
Total revenues	$ 2,493	$ 2,015	$ 1,617
Untied States | Geographic concentration risk | Revenue
Disaggregation of Revenue [Line Items]
Concentration risk percentage	94.00%	95.00%	96.00%
Subscription and support
Disaggregation of Revenue [Line Items]
Total revenues	$ 24,657	$ 19,976	$ 16,043
Sales
Disaggregation of Revenue [Line Items]
Total revenues	5,989	5,191	4,598
Service
Disaggregation of Revenue [Line Items]
Total revenues	6,474	5,377	4,466
Platform and Other
Disaggregation of Revenue [Line Items]
Total revenues	4,509	3,324	2,787
Marketing and Commerce
Disaggregation of Revenue [Line Items]
Total revenues	3,902	3,133	2,506
Data
Disaggregation of Revenue [Line Items]
Total revenues	$ 3,783	$ 2,951	$ 1,686