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Stockholders' Equity - Schedule of As-Converted Class B Common Stock (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 9 Months Ended
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Jun. 30, 2024 | Jun. 30, 2023
Stockholders' Equity Note [Abstract] |  |
Reduction in equivalent number of as-converted shares of class A common stock (in shares) | 0 | 4
Effective price per share (in dollars per share) | $ 0 | $ 219.70
Deposits into the U.S. litigation escrow account | $ 0 | $ 850

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- Definition Deposits To Litigation Escrow Account + References No definition available. + Details
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- Definition Share Reduction, Price Paid Per Share Escrow Funding + References No definition available. + Details
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- Definition Number of shares, on an as-converted basis, that have been repurchased through the Escrow Funding during the period. + References No definition available. + Details
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