Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2020	Oct. 31, 2019
Operating activities:
Net income (loss)		$ 1,081	$ (109)	$ 3,805	$ 374
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization		670	608	1,977	1,502
Amortization of costs capitalized to obtain revenue contracts, net		271	221	768	647
Expenses related to employee stock plans		566	543	1,648	1,274
Loss on settlement of Salesforce.org reseller agreement	[1],[2]	0	0	0	166
Gains on strategic investments, net	[3]	(1,036)	(6)	(1,910)	(396)
Tax benefit from intra-entity transfer of intangible property		0	0	(2,003)	0
Changes in assets and liabilities, net of business combinations:
Accounts receivable, net		128	(29)	2,873	2,599
Costs capitalized to obtain revenue contracts, net		(493)	(246)	(973)	(543)
Prepaid expenses and other current assets and other assets		80	(183)	(134)	(252)
Accounts payable and accrued expenses and other liabilities		68	265	4	13
Operating lease liabilities		(204)	(200)	(616)	(546)
Unearned revenue		(792)	(566)	(2,812)	(2,139)
Net cash provided by operating activities		339	298	2,627	2,699
Investing activities:
Business combinations, net of cash acquired		(24)	94	(1,281)	(339)
Purchases of strategic investments		(368)	(346)	(942)	(567)
Sales of strategic investments		33	138	685	403
Purchases of marketable securities		(1,453)	(438)	(3,968)	(1,944)
Sales of marketable securities		662	427	1,206	888
Maturities of marketable securities		239	358	796	551
Capital expenditures		(124)	(170)	(561)	(507)
Net cash provided by (used in) investing activities		(1,035)	63	(4,065)	(1,515)
Financing activities:
Proceeds from employee stock plans		381	179	1,105	550
Principal payments on financing obligations		(12)	(14)	(84)	(159)
Repayments of debt		(1)	(150)	(3)	(352)
Net cash provided by financing activities		368	15	1,018	39
Effect of exchange rate changes		0	(18)	(1)	(24)
Net increase (decrease) in cash and cash equivalents		(328)	358	(421)	1,199
Cash and cash equivalents, beginning of period		4,052	3,510	4,145	2,669
Cash and cash equivalents, end of period		3,724	3,868	3,724	3,868
Cash paid during the period for:
Interest		46	48	94	104
Income taxes, net of tax refunds		56	38	180	93
Non-cash investing and financing activities:
Fair value of equity awards assumed		0	373	6	373
Fair value of common stock issued as consideration for business combinations		$ 0	$ 15,215	$ 0	$ 15,215

[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.