Shareholders’ Equity - Common Shares (Details)	12 Months Ended
	Sep. 30, 2024 vote shares
Class A
Class of Stock [Line Items]
Number of votes for each share held | vote	1
Class B-1 common shares
Class of Stock [Line Items]
Number of votes for each share held | vote	10
Conversion ratio	1
Class B-2 common shares
Class of Stock [Line Items]
Number of votes for each share held | vote	10
Conversion ratio	1
Class A membership units
Class of Stock [Line Items]
Conversion ratio	1
Class A membership units | Class A
Class of Stock [Line Items]
Membership units (in shares)	15,846,025
Abp Trust | Class B-1 common shares
Class of Stock [Line Items]
Membership units (in shares)	1,000,000
Abp Trust | Class B-2 common shares
Class of Stock [Line Items]
Membership units (in shares)	15,000,000
Abp Trust | Class A membership units
Class of Stock [Line Items]
Membership units (in shares)	15,000,000