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Subsequent Events - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Dec. 31, 2023
Sep. 30, 2023
Sep. 30, 2023
Subsequent Event [Line Items]      
Accounts receivable, credit loss expense (reversal)   $ 210 $ 210
Subsequent Event | Expected      
Subsequent Event [Line Items]      
Accounts receivable, credit loss expense (reversal) $ 511