Investment Portfolio Financing - Schedule of Financial Covenant Compliance (Details) - Holdco $ in Millions		6 Months Ended
Oct. 01, 2024 USD ($)	Jun. 30, 2025 USD ($)
Secured credit agreements
Debt Instrument [Line Items]
Minimum cash liquidity		$ 15.0
Minimum cash liquidity of recourse indebtedness		0.050
Tangible net worth		$ 1,000.0
Tangible net worth, amount of equity		0.75
Amount of redeemed or repurchased equity		0.75
Debt to equity ratio		4.25
Interest coverage, minimum		1.4
Interest coverage, maximum		1.5
Line of Credit \| Secured revolving credit facility \| Secured revolving credit facility
Debt Instrument [Line Items]
Tangible net worth	$ 800.0
Tangible net worth, amount of equity	0.75
Amount of redeemed or repurchased equity	0.75

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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