Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2020	Oct. 31, 2019
Revenues:
Total revenues		$ 5,419	$ 4,513	$ 15,435	$ 12,247
Cost of revenues:
Total cost of revenues	[1],[2]	1,394	1,134	3,959	3,015
Gross profit		4,025	3,379	11,476	9,232
Operating expenses:
Research and development	[1],[2]	902	774	2,659	1,935
Marketing and sales	[1],[2]	2,377	2,063	7,042	5,584
General and administrative	[1],[2]	522	477	1,513	1,214
Loss on settlement of Salesforce.org reseller agreement	[1],[2]	0	0	0	166
Total operating expenses	[1],[2]	3,801	3,314	11,214	8,899
Income from operations		224	65	262	333
Gains on strategic investments, net	[3]	1,036	6	1,910	396
Other expense		(10)	(7)	(36)	(19)
Income before benefit from (provision for) income taxes		1,250	64	2,136	710
Benefit from (provision for) income taxes	[4]	(169)	(173)	1,669	(336)
Net income (loss)		$ 1,081	$ (109)	$ 3,805	$ 374
Basic net income (loss) per share (in dollars per share)		$ 1.19	$ (0.12)	$ 4.20	$ 0.46
Diluted net income (loss) per share (in dollars per share)		$ 1.15	$ (0.12)	$ 4.11	$ 0.45
Shares used in computing basic net income (loss) per share (in shares)		911	879	905	809
Shares used in computing diluted net income (loss) per share (in shares)		939	879	926	829
Net unrealized gains (loss) recognized		$ 1,000		$ 1,600
Publicly traded securities
Operating expenses:
Net unrealized gains (loss) recognized		997	$ (84)	1,620	$ 132
Subscription and support
Revenues:
Total revenues		5,085	4,239	14,500	11,480
Cost of revenues:
Total cost of revenues	[1],[2]	1,060	870	3,039	2,275
Professional services and other
Revenues:
Total revenues		334	274	935	767
Cost of revenues:
Total cost of revenues	[1],[2]	$ 334	$ 264	$ 920	$ 740

[1] Amounts include amortization of intangible assets acquired through business combinations, as follows:  Three Months Ended October 31,Nine Months Ended October 31, 2020201920202019Cost of revenues$169 $157 $494 $280 Marketing and sales114 109 344 242 

[2] Amounts include stock-based expense, as follows:  Three Months Ended October 31,Nine Months Ended October 31, 2020201920202019Cost of revenues$65 $54 $180 $143 Research and development181 169 531 348 Marketing and sales242 249 718 625 General and administrative78 71 219 158 

[3] In September 2020, one of the Company’s strategic investments completed its initial public offering, resulting in an unrealized gain of $1.1 billion during the three and nine months ended October 31, 2020.

[4] In the second quarter of fiscal 2021, the Company recorded approximately $2.0 billion of benefit from income taxes due to a one-time discrete tax item from the recognition of deferred tax assets related to an intra-entity transfer of intangible property.