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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Millions
 3 Months Ended
Aug. 31, 2023
Aug. 31, 2022
Operating Activities:    
Net income $ 1,078 $ 875
Adjustments to reconcile net income to cash provided by operating activities:    
Depreciation and amortization 1,071 1,024
Provision for uncollectible accounts 103 245
Stock-based compensation 56 68
Other noncash items including leases and deferred income taxes 728 774
Business optimization and realignment costs, net of payments (73) (14)
Changes in assets and liabilities:    
Receivables (126) 259
Other assets (131) (170)
Accounts payable and other liabilities (470) (1,473)
Other, net (6) 19
Cash provided by operating activities 2,230 1,607
Investing Activities:    
Capital expenditures (1,290) (1,284)
Purchase of investments (2) (35)
Proceeds from asset dispositions and other 12 10
Cash used in investing activities (1,280) (1,309)
Financing Activities:    
Principal payments on debt (66) (29)
Proceeds from stock issuances 157 81
Dividends paid (318) (299)
Purchase of treasury stock (500) 0
Cash used in financing activities (727) (247)
Effect of exchange rate changes on cash (24) (98)
Net increase (decrease) in cash and cash equivalents 199 (47)
Cash and cash equivalents at beginning of period 6,856 6,897
Cash and cash equivalents at end of period $ 7,055 $ 6,850