Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Operating activities:
Net income		$ 2,625	$ 91	$ 2,724	$ 483
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		649	457	1,307	894
Amortization of costs capitalized to obtain revenue contracts, net		250	217	497	426
Expenses related to employee stock plans		578	388	1,082	731
Loss on settlement of Salesforce.org reseller agreement	[1],[2]	0	166	0	166
Gains on strategic investments, net		(682)	(109)	(874)	(390)
Tax benefit from intra-entity transfer of intangible property		(2,003)	0	(2,003)	0
Changes in assets and liabilities, net of business combinations:
Accounts receivable, net		(349)	(146)	2,745	2,628
Costs capitalized to obtain revenue contracts, net		(455)	(173)	(480)	(297)
Prepaid expenses and other current assets and other assets		(203)	28	(214)	(69)
Accounts payable and accrued expenses and other liabilities		693	293	(64)	(252)
Operating lease liabilities		(209)	(182)	(412)	(346)
Unearned revenue		(465)	(594)	(2,020)	(1,573)
Net cash provided by operating activities		429	436	2,288	2,401
Investing activities:
Business combinations, net of cash acquired		(1,154)	(423)	(1,257)	(433)
Purchases of strategic investments		(232)	(62)	(574)	(221)
Sales of strategic investments		51	71	652	265
Purchases of marketable securities		(1,681)	(772)	(2,515)	(1,506)
Sales of marketable securities		207	375	544	461
Maturities of marketable securities		330	137	557	193
Capital expenditures		(114)	(178)	(437)	(337)
Net cash used in investing activities		(2,593)	(852)	(3,030)	(1,578)
Financing activities:
Proceeds from employee stock plans		466	152	724	371
Principal payments on financing obligations		(24)	(134)	(72)	(145)
Repayments of debt		(1)	(201)	(2)	(202)
Net cash provided by (used in) financing activities		441	(183)	650	24
Effect of exchange rate changes		3	(1)	(1)	(6)
Net increase (decrease) in cash and cash equivalents		(1,720)	(600)	(93)	841
Cash and cash equivalents, beginning of period		5,772	4,110	4,145	2,669
Cash and cash equivalents, end of period		4,052	3,510	4,052	3,510
Cash paid during the period for:
Interest		2	6	48	56
Income taxes, net of tax refunds		66	37	124	55
Non-cash investing and financing activities:
Fair value of equity awards assumed		$ 6	$ 0	$ 6	$ 0

[1] Amounts include amortization of intangible assets acquired through business combinations, as follows:  Three Months Ended July 31,Six Months Ended July 31, 2020201920202019Cost of revenues$166 $62 $325 $123 Marketing and sales118 65 230 133 

[2] Amounts include stock-based expense, as follows:  Three Months Ended July 31,Six Months Ended July 31, 2020201920202019Cost of revenues$63 $46 $115 $89 Research and development184 98 350 179 Marketing and sales253 199 476 376 General and administrative78 45 141 87