Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Feb. 29, 2024	Feb. 28, 2023
Operating Activities:
Net income	$ 2,857	$ 2,434
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	3,183	3,101
Provision for uncollectible accounts	323	536
Stock-based compensation	130	142
Other noncash items including leases and deferred income taxes	2,141	2,425
Business optimization and realignment costs, net of payments	(50)	20
Changes in assets and liabilities:
Receivables	(110)	373
Other assets	(119)	(110)
Accounts payable and other liabilities	(2,711)	(3,534)
Other, net	(30)	14
Cash provided by operating activities	5,614	5,401
Investing Activities:
Capital expenditures	(3,974)	(4,420)
Purchase of investments	(110)	(82)
Proceeds from sale of investments	24
Proceeds from asset dispositions and other	94	72
Cash used in investing activities	(3,966)	(4,430)
Financing Activities:
Principal payments on debt	(143)	(123)
Proceeds from stock issuances	265	114
Dividends paid	(949)	(888)
Purchase of treasury stock	(2,000)	(1,500)
Other, net	(7)	1
Cash used in financing activities	(2,834)	(2,396)
Effect of exchange rate changes on cash	(26)	(99)
Net decrease in cash and cash equivalents	(1,212)	(1,524)
Cash and cash equivalents at beginning of period	6,856	6,897
Cash and cash equivalents at end of period	$ 5,644	$ 5,373