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Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)
$ in Millions
Jun. 30, 2022
Sep. 30, 2021
Accounts receivable, allowances $ 21 $ 20
Accumulated depreciation $ 462 $ 419
Class A Common Stock    
Par value (in dollars per share) $ 0.001 $ 0.001
Shares authorized (in shares) 1,000,000,000 1,000,000,000
Shares issued (in shares) 137,198,864 122,414,827
Shares outstanding (in shares) 137,198,864 122,414,827
Class B Common Stock    
Par value (in dollars per share) $ 0.001 $ 0.001
Shares authorized (in shares) 1,000,000,000 1,000,000,000
Shares issued (in shares) 377,650,449 391,970,996
Shares outstanding (in shares) 377,650,449 391,970,996