Stockholders' and Members' Equity - Summary of Restricted Stock Units Activity (Details) - Restricted Stock Units	9 Months Ended
	Jun. 30, 2023 $ / shares shares
Number of Shares
Beginning balance (in shares) | shares	559,793,000
Awarded (in shares) | shares	216,771,000
Vested (in shares) | shares	(163,393,000)
Forfeited (in shares) | shares	(2,001,000)
Ending balance (in shares) | shares	611,170,000
Weighted Average Grant Date Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 28.01
Awarded (in dollars per shares) | $ / shares	30.08
Vested (in dollars per shares) | $ / shares	23.44
Forfeited (in dollars per shares) | $ / shares	38.66
Ending balance (in dollars per share) | $ / shares	$ 29.93