Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Cash provided (used) by operations:
Net income	$ 5,727	$ 2,539	$ 4,029
Adjustments to reconcile net income to net cash provided (used) by operations:
Depreciation	744	721	705
Deferred income taxes	(385)	(380)	34
Stock-based compensation	611	429	325
Amortization, impairment and other	53	398	15
Net foreign currency adjustments	(138)	23	233
Changes in certain working capital components and other assets and liabilities:
(Increase) decrease in accounts receivable	(1,606)	1,239	(270)
(Increase) decrease in inventories	507	(1,854)	(490)
(Increase) decrease in prepaid expenses, operating lease right-of-use assets and other current and non-current assets	(182)	(654)	(203)
Increase (decrease) in accounts payable, accrued liabilities, operating lease liabilities and other current and non-current liabilities	1,326	24	1,525
Cash provided (used) by operations	6,657	2,485	5,903
Cash provided (used) by investing activities:
Purchases of short-term investments	(9,961)	(2,426)	(2,937)
Maturities of short-term investments	4,236	74	1,715
Sales of short-term investments	2,449	2,379	2,072
Additions to property, plant and equipment	(695)	(1,086)	(1,119)
Other investing activities	171	31	5
Cash provided (used) by investing activities	(3,800)	(1,028)	(264)
Cash provided (used) by financing activities:
Proceeds from borrowings, net of debt issuance costs	0	6,134	0
Increase (decrease) in notes payable, net	(52)	49	(325)
Repayment of borrowings	(197)	(6)	(6)
Proceeds from exercise of stock options and other stock issuances	1,172	885	700
Repurchase of common stock	(608)	(3,067)	(4,286)
Dividends — common and preferred	(1,638)	(1,452)	(1,332)
Other financing activities	(136)	(52)	(44)
Cash provided (used) by financing activities	(1,459)	2,491	(5,293)
Effect of exchange rate changes on cash and equivalents	143	(66)	(129)
Net increase (decrease) in cash and equivalents	1,541	3,882	217
Cash and equivalents, beginning of year	8,348	4,466	4,249
CASH AND EQUIVALENTS, END OF YEAR	9,889	8,348	4,466
Cash paid during the year for:
Interest, net of capitalized interest	293	140	153
Income taxes	1,177	1,028	757
Non-cash additions to property, plant and equipment	179	121	160
Dividends declared and not paid	$ 438	$ 385	$ 347