Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Nov. 30, 2024	Nov. 30, 2023
Operating Activities:
Net income	$ 1,535	$ 1,978
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	2,141	2,111
Provision for uncollectible accounts	250	216
Other noncash items including leases and deferred income taxes	1,589	1,427
Stock-based compensation	84	96
Business optimization costs, net of payments	125	(28)
Changes in assets and liabilities:
Receivables	(1,079)	(687)
Other assets	(111)	(110)
Accounts payable and other liabilities	(2,087)	(975)
Other, net	58	(24)
Cash provided by operating activities	2,505	4,004
Investing Activities:
Capital expenditures	(1,585)	(2,595)
Purchase of investments	(107)	(75)
Proceeds from sale of investments	52	0
Proceeds from asset dispositions and other	34	62
Cash used in investing activities	(1,606)	(2,608)
Financing Activities:
Principal payments on debt	(47)	(94)
Proceeds from stock issuances	440	211
Dividends paid	(676)	(635)
Purchase of treasury stock	(2,020)	(1,000)
Other	(6)	0
Cash used in financing activities	(2,309)	(1,518)
Effect of exchange rate changes on cash	(62)	(5)
Net decrease in cash and cash equivalents	(1,472)	(127)
Cash and cash equivalents at beginning of period	6,501	6,856
Cash and cash equivalents at end of period	$ 5,029	$ 6,729