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Credit Losses - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Feb. 28, 2025
Feb. 29, 2024
Feb. 28, 2025
Feb. 29, 2024
May 31, 2024
Credit Loss [Abstract]          
Credit losses $ 132 $ 106 $ 382 $ 323  
Allowance for credit losses $ 415   $ 415   $ 436