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Fair Value - Schedule of Assets Measured at Fair Value by Investment Type on a Recurring Basis (Details) - USD ($) $ in Millions		Mar. 31, 2026	Dec. 31, 2025
Senior Secured Notes [Member]
Schedule of Assets Measured at Fair Value by Investment Type on a Recurring Basis [Line Items]
Assets		$ 150.8	$ 147.3
CLO Equity [Member]
Schedule of Assets Measured at Fair Value by Investment Type on a Recurring Basis [Line Items]
Assets		72.2	95.1
Equity and Other Investments [Member]
Schedule of Assets Measured at Fair Value by Investment Type on a Recurring Basis [Line Items]
Assets		12.4	9.4
Total Investments at fair value [Member]
Schedule of Assets Measured at Fair Value by Investment Type on a Recurring Basis [Line Items]
Assets	[1]	235.4	251.7
Cash Equivalents [Member]
Schedule of Assets Measured at Fair Value by Investment Type on a Recurring Basis [Line Items]
Assets		40.6	51.2
Total assets at fair value [Member]
Schedule of Assets Measured at Fair Value by Investment Type on a Recurring Basis [Line Items]
Assets		276.0	303.0	[1]
Recurring [Member] | Senior Secured Notes [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Schedule of Assets Measured at Fair Value by Investment Type on a Recurring Basis [Line Items]
Assets
Recurring [Member] | Senior Secured Notes [Member] | Significant Other Observable Inputs (Level 2) [Member]
Schedule of Assets Measured at Fair Value by Investment Type on a Recurring Basis [Line Items]
Assets
Recurring [Member] | Senior Secured Notes [Member] | Significant Unobservable Inputs (Level 3) [Member]
Schedule of Assets Measured at Fair Value by Investment Type on a Recurring Basis [Line Items]
Assets		150.8	147.3
Recurring [Member] | CLO Equity [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Schedule of Assets Measured at Fair Value by Investment Type on a Recurring Basis [Line Items]
Assets
Recurring [Member] | CLO Equity [Member] | Significant Other Observable Inputs (Level 2) [Member]
Schedule of Assets Measured at Fair Value by Investment Type on a Recurring Basis [Line Items]
Assets
Recurring [Member] | CLO Equity [Member] | Significant Unobservable Inputs (Level 3) [Member]
Schedule of Assets Measured at Fair Value by Investment Type on a Recurring Basis [Line Items]
Assets		72.2	95.1
Recurring [Member] | Equity and Other Investments [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Schedule of Assets Measured at Fair Value by Investment Type on a Recurring Basis [Line Items]
Assets
Recurring [Member] | Equity and Other Investments [Member] | Significant Other Observable Inputs (Level 2) [Member]
Schedule of Assets Measured at Fair Value by Investment Type on a Recurring Basis [Line Items]
Assets
Recurring [Member] | Equity and Other Investments [Member] | Significant Unobservable Inputs (Level 3) [Member]
Schedule of Assets Measured at Fair Value by Investment Type on a Recurring Basis [Line Items]
Assets		12.4	9.4
Recurring [Member] | Total Investments at fair value [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Schedule of Assets Measured at Fair Value by Investment Type on a Recurring Basis [Line Items]
Assets				[1]
Recurring [Member] | Total Investments at fair value [Member] | Significant Other Observable Inputs (Level 2) [Member]
Schedule of Assets Measured at Fair Value by Investment Type on a Recurring Basis [Line Items]
Assets				[1]
Recurring [Member] | Total Investments at fair value [Member] | Significant Unobservable Inputs (Level 3) [Member]
Schedule of Assets Measured at Fair Value by Investment Type on a Recurring Basis [Line Items]
Assets		235.4	251.7	[1]
Recurring [Member] | Cash Equivalents [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Schedule of Assets Measured at Fair Value by Investment Type on a Recurring Basis [Line Items]
Assets		40.6	51.2
Recurring [Member] | Cash Equivalents [Member] | Significant Other Observable Inputs (Level 2) [Member]
Schedule of Assets Measured at Fair Value by Investment Type on a Recurring Basis [Line Items]
Assets
Recurring [Member] | Cash Equivalents [Member] | Significant Unobservable Inputs (Level 3) [Member]
Schedule of Assets Measured at Fair Value by Investment Type on a Recurring Basis [Line Items]
Assets
Recurring [Member] | Total assets at fair value [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Schedule of Assets Measured at Fair Value by Investment Type on a Recurring Basis [Line Items]
Assets		40.6	51.2	[1]
Recurring [Member] | Total assets at fair value [Member] | Significant Other Observable Inputs (Level 2) [Member]
Schedule of Assets Measured at Fair Value by Investment Type on a Recurring Basis [Line Items]
Assets				[1]
Recurring [Member] | Total assets at fair value [Member] | Significant Unobservable Inputs (Level 3) [Member]
Schedule of Assets Measured at Fair Value by Investment Type on a Recurring Basis [Line Items]
Assets		$ 235.4	$ 251.7	[1]
[1] Totals may not sum due to rounding.

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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