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Debt - Subordinated Notes (Details) - USD ($)	May 27, 2025	Sep. 30, 2025
Subordinated Notes
Debt Instrument [Line Items]
Interest rate (as a percent)		8.45%
Senior Notes | Subordinated Notes
Debt Instrument [Line Items]
Aggregate principal amount	$ 750,000,000
Interest rate (as a percent)	8.45%
Senior Notes | Senior Notes Due May 2026
Debt Instrument [Line Items]
Net proceeds from this offering to redeem	$ 500,000,000
Redemption premium	$ 3,300,000

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