Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Feb. 28, 2021	Feb. 29, 2020
Cash provided (used) by operations:
Net income	$ 4,218	$ 3,329
Adjustments to reconcile net income to net cash provided (used) by operations:
Depreciation	543	513
Deferred income taxes	(291)	(372)
Stock-based compensation	467	303
Amortization, impairment and other	33	383
Net foreign currency adjustments	(130)	(49)
Changes in certain working capital components and other assets and liabilities:
(Increase) decrease in accounts receivable	(837)	(475)
(Increase) decrease in inventories	674	(455)
(Increase) decrease in prepaid expenses, operating lease right-of-use assets and other current and non-current assets	(406)	(494)
Increase (decrease) in accounts payable, accrued liabilities, operating lease liabilities and other current and non-current liabilities	374	(197)
Cash provided (used) by operations	4,645	2,486
Cash provided (used) by investing activities:
Purchases of short-term investments	(7,441)	(1,775)
Maturities of short-term investments	2,203	20
Sales of short-term investments	1,588	1,764
Additions to property, plant and equipment	(521)	(797)
Other investing activities	184	30
Cash provided (used) by investing activities	(3,987)	(758)
Cash provided (used) by financing activities:
Increase (decrease) in notes payable	(51)	0
Repayment of borrowings	(196)	(5)
Proceeds from exercise of stock options and other stock issuances	969	678
Repurchase of common stock	0	(2,865)
Dividends — common and preferred	(1,203)	(1,071)
Other financing activities	(131)	(47)
Cash provided (used) by financing activities	(612)	(3,310)
Effect of exchange rate changes on cash and equivalents	122	(21)
Net increase (decrease) in cash and equivalents	168	(1,603)
Cash and equivalents, beginning of period	8,348	4,466
CASH AND EQUIVALENTS, END OF PERIOD	8,516	2,863
Supplemental disclosure of cash flow information:
Non-cash additions to property, plant and equipment	116	115
Dividends declared and not paid	$ 437	$ 384