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Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2022	Sep. 30, 2021
Accounts receivable, allowances	$ 22	$ 20
Accumulated depreciation	$ 452	$ 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)	137,198,372	122,414,827
Shares outstanding (in shares)	137,198,372	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

X

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount of allowance for credit loss on accounts receivable, classified as current.

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