Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Nov. 30, 2022	Nov. 30, 2021
Operating Activities:
Net income	$ 1,663	$ 2,156
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	2,070	1,966
Provision for uncollectible accounts	425	211
Stock-based compensation	108	112
Retirement plans mark-to-market adjustments		260
Other noncash items including leases and deferred income taxes	1,589	1,713
Business realignment and optimization costs/(payments), net	(40)	55
Changes in assets and liabilities:
Receivables	(512)	(519)
Other assets	(214)	(236)
Accounts payable and other liabilities	(1,994)	(1,582)
Other, net	30	(54)
Cash provided by operating activities	3,125	4,082
Investing Activities:
Capital expenditures	(3,142)	(3,143)
Purchase of investments	(78)
Proceeds from asset dispositions and other	20	31
Cash used in investing activities	(3,200)	(3,112)
Financing Activities:
Principal payments on debt	(32)	(72)
Proceeds from stock issuances	89	111
Dividends paid	(598)	(400)
Purchase of treasury stock	(1,500)	(748)
Other, net	1
Cash (used in) provided by financing activities	(2,040)	(1,109)
Effect of exchange rate changes on cash	(136)	(115)
Net (decrease) increase in cash and cash equivalents	(2,251)	(254)
Cash and cash equivalents at beginning of period	6,897	7,087
Cash and cash equivalents at end of period	$ 4,646	$ 6,833