Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Aug. 31, 2020	Aug. 31, 2019
Cash provided (used) by operations:
Net income	$ 1,518	$ 1,367
Adjustments to reconcile net income to net cash provided (used) by operations:
Depreciation	176	169
Deferred income taxes	(220)	(42)
Stock-based compensation	136	80
Amortization, impairment and other	41	6
Net foreign currency adjustments	(45)	49
Changes in certain working capital components and other assets and liabilities:
(Increase) decrease in accounts receivable	(990)	(456)
(Increase) decrease in inventories	689	(270)
(Increase) decrease in prepaid expenses, operating lease right-of-use assets and other current and non-current assets	(338)	38
Increase (decrease) in accounts payable, accrued liabilities, operating lease liabilities and other current and non-current liabilities	(85)	(547)
Cash provided (used) by operations	882	394
Cash provided (used) by investing activities:
Purchases of short-term investments	(1,401)	(504)
Maturities of short-term investments	302	16
Sales of short-term investments	384	533
Additions to property, plant and equipment	(176)	(284)
Other investing activities	2	(109)
Cash provided (used) by investing activities	(889)	(348)
Cash provided (used) by financing activities:
Increase (decrease) in notes payable	(30)	241
Repayment of borrowings	(83)	(2)
Proceeds from exercise of stock options and other stock issuances	302	111
Repurchase of common stock	0	(999)
Dividends — common and preferred	(384)	(345)
Other financing activities	(53)	(16)
Cash provided (used) by financing activities	(248)	(1,010)
Effect of exchange rate changes on cash and equivalents	55	(56)
Net increase (decrease) in cash and equivalents	(200)	(1,020)
Cash and equivalents, beginning of period	8,348	4,466
CASH AND EQUIVALENTS, END OF PERIOD	8,148	3,446
Supplemental disclosure of cash flow information:
Non-cash additions to property, plant and equipment	114	90
Dividends declared and not paid	$ 383	$ 344