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Accumulated Other Comprehensive Loss - Schedule of Changes in Accumulated Other Comprehensive Income (Loss) ("AOCI") (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Nov. 30, 2023
Nov. 30, 2022
Nov. 30, 2023
Nov. 30, 2022
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning Balance     $ 26,088  
Translation adjustments $ 28 $ (70)   $ (279)
Ending Balance 26,766 24,115 26,766 24,115
Foreign Currency Translation Loss [Member]        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning Balance (1,390) (1,357) (1,362) (1,148)
Translation adjustments 28 (70)   (279)
Ending Balance (1,362) (1,427) (1,362) (1,427)
Retirement Plans Adjustments [Member]        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning Balance 34 43 35 45
Prior service credit arising during period 36   36  
Reclassifications from AOCI (2) (1) (3) (3)
Ending Balance 68 42 68 42
Accumulated Other Comprehensive (Loss) [Member]        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning Balance (1,356) (1,314) (1,327) (1,103)
Ending Balance $ (1,294) $ (1,385) $ (1,294) $ (1,385)