Earnings (Loss) Per Share - Schedule of Potentially Dilutive Shares Excluded from the Calculation of Diluted Loss Per Share (Detail) - shares	3 Months Ended	6 Months Ended
	Mar. 31, 2022	Mar. 31, 2022
Paired Interests
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	240,072,035	239,523,385
Profits interest awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	9,813,570	10,147,330
Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	570,487	636,269
RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	468,146	736,252