Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Jan. 31, 2020	Jan. 31, 2019		Jan. 31, 2018
Revenues:
Total revenues		$ 17,098	$ 13,282		$ 10,540
Cost of revenues:
Total cost of revenues	[1],[2]	4,235	3,451		2,773
Gross profit		12,863	9,831		7,767
Operating expenses:
Research and development	[1],[2]	2,766	1,886		1,553
Marketing and sales	[1],[2]	7,930	6,064		4,671
General and administrative	[1],[2]	1,704	1,346		1,089
Loss on settlement of Salesforce.org reseller agreement (Note 7)		166	0	[1],[2]	0	[1],[2]
Total operating expenses	[1],[2]	12,566	9,296		7,313
Income from operations		297	535		454
Gains on strategic investments, net		427	542		19
Other expense		(18)	(94)		(53)
Income before benefit from (provision for) income taxes		706	983		420
Benefit from (provision for) income taxes (3)	[3]	(580)	127		(60)
Net income		$ 126	$ 1,110		$ 360
Basic net income per share (in dollars per share)		$ 0.15	$ 1.48		$ 0.50
Diluted net income per share (in dollars per share)		$ 0.15	$ 1.43		$ 0.49
Shares used in computing basic net income per share (in shares)		829	751		715
Shares used in computing diluted net income per share (in shares)		850	775		735
Subscription and support
Revenues:
Total revenues		$ 16,043	$ 12,413		$ 9,766
Cost of revenues:
Total cost of revenues	[1],[2]	3,198	2,604		2,033
Professional services and other
Revenues:
Total revenues		1,055	869		774
Cost of revenues:
Total cost of revenues	[1],[2]	$ 1,037	$ 847		$ 740

[1] Amounts include amortization of intangible assets acquired through business combinations, as follows:  Fiscal Year Ended January 31, 202020192018Cost of revenues$440  $215  $166  Marketing and sales352  232  121  

[2] Amounts include stock-based expense, as follows:  Fiscal Year Ended January 31, 202020192018Cost of revenues$204  $161  $130  Research and development510  307  260  Marketing and sales852  643  469  General and administrative219  172  138  

[3] Amounts include a benefit related to the partial release of the valuation allowance of $612 million, and $2 million, for fiscal 2019 and 2018, respectively. The fiscal 2019 benefit was partially offset by an increase in unrecognized tax benefits.