CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Feb. 28, 2021	Feb. 29, 2020
Cash flows from operating activities:
Net income	$ 9,714	$ 7,019
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	1,127	1,025
Amortization of intangible assets	1,037	1,221
Deferred income taxes	(2,475)	(398)
Stock-based compensation	1,395	1,204
Other, net	227	167
Changes in operating assets and liabilities, net of effects from acquisitions:
Decrease in trade receivables, net	1,089	946
Decrease in prepaid expenses and other assets	609	718
Decrease in accounts payable and other liabilities	(247)	(1,035)
Decrease in income taxes payable	(1,181)	(789)
Decrease in deferred revenues	(250)	(553)
Net cash provided by operating activities	11,045	9,525
Cash flows from investing activities:
Purchases of marketable securities and other investments	(26,775)	(399)
Proceeds from maturities of marketable securities and other investments	18,182	3,165
Proceeds from sales of marketable securities	853	12,575
Acquisitions, net of cash acquired	(29)	(111)
Capital expenditures	(1,418)	(1,131)
Net cash (used for) provided by investing activities	(9,187)	14,099
Cash flows from financing activities:
Payments for repurchases of common stock	(12,958)	(13,935)
Proceeds from issuances of common stock	915	1,232
Shares repurchased for tax withholdings upon vesting of restricted stock-based awards	(597)	(624)
Payments of dividends to stockholders	(2,146)	(2,330)
Repayments of borrowings	(2,631)	(4,500)
Other, net	241	(108)
Net cash used for financing activities	(17,176)	(20,265)
Effect of exchange rate changes on cash and cash equivalents	400	(44)
Net (decrease) increase in cash and cash equivalents	(14,918)	3,315
Cash and cash equivalents at beginning of period	37,239	20,514
Cash and cash equivalents at end of period	22,321	23,829
Non-cash financing activities:
Change in unsettled repurchases of common stock	$ 42	$ 65