INVESTMENTS - Amortized Cost and Fair Value of the Investment in IHAM (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025		Dec. 31, 2024
Schedule of Investments [Line Items]
Amortized Cost	$ 29,249.9	[1]	$ 26,374.0	[2]
Fair Value	29,484.8	[1]	26,719.9	[2]
Ivy Hill Asset Management, L.P.
Schedule of Investments [Line Items]
Amortized Cost	2,231.0		1,701.0
Fair Value	2,434.0		1,915.0
Subordinated loan
Schedule of Investments [Line Items]
Amortized Cost	530.0		0.0
Fair Value	530.0		0.0
Commitment to fund	750.0		500.0
Equity
Schedule of Investments [Line Items]
Amortized Cost	1,701.0		1,701.0
Fair Value	$ 1,904.0		$ 1,915.0

[1] As of December 31, 2025, the estimated net unrealized gain for federal tax purposes was approximately $300 million based on a tax cost basis of $29.2 billion. As of December 31, 2025, the estimated aggregate gross unrealized gain for federal income tax purposes was approximately $1.3 billion and the estimated aggregate gross unrealized loss for federal income tax purposes was approximately $1.0 billion.

[2] As of December 31, 2024, the estimated net unrealized gain for federal tax purposes was $0.2 billion based on a tax cost basis of $26.5 billion. As of December 31, 2024, the estimated aggregate gross unrealized gain for federal income tax purposes was $1.7 billion and the estimated aggregate gross unrealized loss for federal income tax purposes was $1.5 billion.