Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Nov. 30, 2021	Nov. 30, 2020
Cash provided (used) by operations:
Net income	$ 3,211	$ 2,769
Adjustments to reconcile net income to net cash provided (used) by operations:
Depreciation	358	361
Deferred income taxes	(222)	(177)
Stock-based compensation	306	325
Amortization, impairment and other	3	103
Net foreign currency adjustments	48	(98)
Changes in certain working capital components and other assets and liabilities:
(Increase) decrease in accounts receivable	543	(921)
(Increase) decrease in inventories	268	1,321
(Increase) decrease in prepaid expenses, operating lease right-of-use assets and other current and non-current assets	(444)	(163)
Increase (decrease) in accounts payable, accrued liabilities, operating lease liabilities and other current and non-current liabilities	(203)	(165)
Cash provided (used) by operations	3,868	3,355
Cash provided (used) by investing activities:
Purchases of short-term investments	(6,699)	(4,505)
Maturities of short-term investments	3,891	802
Sales of short-term investments	2,032	914
Additions to property, plant and equipment	(362)	(344)
Other investing activities	33	256
Cash provided (used) by investing activities	(1,105)	(2,877)
Cash provided (used) by financing activities:
Increase (decrease) in notes payable	13	(37)
Repayment of borrowings	0	(173)
Proceeds from exercise of stock options and other stock issuances	846	781
Repurchase of common stock	(1,723)	0
Dividends — common and preferred	(873)	(769)
Other financing activities	(109)	(94)
Cash provided (used) by financing activities	(1,846)	(292)
Effect of exchange rate changes on cash and equivalents	(55)	101
Net increase (decrease) in cash and equivalents	862	287
Cash and equivalents, beginning of period	9,889	8,348
CASH AND EQUIVALENTS, END OF PERIOD	10,751	8,635
Supplemental disclosure of cash flow information:
Non-cash additions to property, plant and equipment	103	118
Dividends declared and not paid	$ 481	$ 435