INVESTMENTS - Ivy Hill Asset Management, L.P. (Details) $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($) borrower		Dec. 31, 2024 USD ($)		Dec. 31, 2023 USD ($)
Schedule of Investments [Line Items]
Amortized cost of investments	$ 29,249.9	[1]	$ 26,374.0	[2]
Purchases of investments	14,075.0		12,622.0		$ 5,804.0
Ivy Hill Asset Management, L.P.
Schedule of Investments [Line Items]
Purchases of investments	3,707.0		759.0		1,193.0
Ivy Hill Asset Management, L.P.
Schedule of Investments [Line Items]
Assets under management	$ 14,600.0
Number of borrowers | borrower	23
Amortized cost of investments	$ 3,190.0		2,237.0
Other income	12.0		15.0
Purchases of investments			32.0		85.0
Realized gain (loss) on sale of investments	0.0		(1.0)		(13.0)
Ivy Hill Asset Management, L.P. | Operating Segments | Ivy Hill Asset Management, L.P.
Schedule of Investments [Line Items]
Amortized cost of investments	11,766.0		8,343.0
Other income	52.0		53.0		56.0
Other investment-related income	$ 282.0		$ 344.0		$ 328.0

[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.