v3.26.1
Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)
$ in Millions
Jun. 30, 2026
Sep. 30, 2025
Statement of Financial Position [Abstract]    
Securities and other assets segregated under federal and other regulations $ 888.5 $ 950.0
Deposits with and receivables from broker-dealers, clearing organizations and counterparties at fair value 5,414.0 6,442.9
Receivables from clients at fair value 70.3 58.1
Financial instruments owned, securities pledged as collateral that can be sold or repledged 2,244.1 1,165.8
Physical commodities inventory at fair value 413.5 471.1
Accounts payable and other accrued liabilities at fair value 57.5 32.3
Payables to client at fair value 1,033.2 530.7
Payables to broker-dealers, clearing organizations and counterparties at fair value $ 27.0 $ 38.4
Preferred stock - par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock - authorized (in shares) 1,000,000 1,000,000
Preferred stock - issued (in shares) 0 0
Preferred stock - outstanding (in shares) 0 0
Common stock - par value (in dollars per share) $ 0.01 $ 0.01
Common stock - authorized (in shares) 200,000,000 200,000,000
Common stock - issued (in shares) 126,225,774 123,649,546
Common stock - outstanding (in shares) 119,995,698 117,419,470
Treasury stock - shares (in shares) 6,230,076 6,230,076