CONSOLIDATED STATEMENT OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
INVESTMENT INCOME:
PIK interest income	$ 219.0	$ 206.0	$ 166.0
PIK dividend income	268.0	257.0	198.0
Total investment income	3,052.0	2,990.0	2,614.0
EXPENSES:
Interest and credit facility fees	793.0	715.0	582.0
Base management fee	425.0	374.0	323.0
Income based fee	348.0	364.0	328.0
Capital gains incentive fee	(23.0)	18.0	53.0
Administrative and other fees	15.0	12.0	13.0
Other general and administrative	36.0	31.0	29.0
Total expenses	1,594.0	1,514.0	1,328.0
NET INVESTMENT INCOME BEFORE INCOME TAXES	1,458.0	1,476.0	1,286.0
Income tax expense, including excise taxes	43.0	40.0	28.0
NET INVESTMENT INCOME	1,415.0	1,436.0	1,258.0
REALIZED AND UNREALIZED GAINS (LOSSES) ON INVESTMENTS, FOREIGN CURRENCY AND OTHER TRANSACTIONS:
Foreign currency and other transactions	(6.0)	5.0	(24.0)
Net income tax expense on net realized gains	(115.0)	(33.0)	8.0
Net realized losses	(20.0)	(88.0)	(171.0)
Foreign currency and other transactions	(41.0)	50.0	6.0
Net change in deferred tax liabilities	59.0	(5.0)	(64.0)
Net unrealized gains (losses)	(96.0)	188.0	435.0
Net realized and unrealized gains (losses) on investments, foreign currency and other transactions	(116.0)	100.0	264.0
Realized loss on extinguishment of debt	0.0	(14.0)	0.0
NET INCREASE IN STOCKHOLDERS’ EQUITY RESULTING FROM OPERATIONS	$ 1,299.0	$ 1,522.0	$ 1,522.0
NET INCOME PER COMMON SHARE
Basic (in usd per share)	$ 1.86	$ 2.44	$ 2.75
Diluted (in usd per share)	$ 1.86	$ 2.44	$ 2.68
WEIGHTED AVERAGE SHARES OF COMMON STOCK OUTSTANDING
Basic (in shares)	699	624	554
Diluted (in shares)	699	624	575
Non-controlled/non-affiliate company investments
INVESTMENT INCOME:
Interest income (excluding payment-in-kind (“PIK”) interest income)	$ 1,790.0	$ 1,749.0	$ 1,564.0
PIK interest income	184.0	174.0	143.0
Capital structuring service fees	178.0	156.0	83.0
Dividend income (excluding PIK dividend income)	30.0	49.0	47.0
PIK dividend income	266.0	253.0	195.0
Other income	87.0	55.0	53.0
Total investment income	2,535.0	2,436.0	2,085.0
REALIZED AND UNREALIZED GAINS (LOSSES) ON INVESTMENTS, FOREIGN CURRENCY AND OTHER TRANSACTIONS:
Net realized gains (losses):	80.0	(78.0)	(146.0)
Net unrealized gains (losses):	4.0	35.0	443.0
Non-controlled affiliate company investments
INVESTMENT INCOME:
Interest income (excluding payment-in-kind (“PIK”) interest income)	15.0	20.0	12.0
PIK interest income	17.0	14.0	5.0
Capital structuring service fees	0.6	2.8	0.0
Dividend income (excluding PIK dividend income)	0.0	2.0	7.0
Other income	0.5	1.9	0.0
Total investment income	33.0	41.0	24.0
REALIZED AND UNREALIZED GAINS (LOSSES) ON INVESTMENTS, FOREIGN CURRENCY AND OTHER TRANSACTIONS:
Net realized gains (losses):	(34.9)	(6.0)	(10.0)
Net unrealized gains (losses):	(43.5)	23.4	34.0
Controlled affiliate company investments
INVESTMENT INCOME:
Interest income (excluding payment-in-kind (“PIK”) interest income)	159.0	187.0	220.0
PIK interest income	18.0	18.0	18.0
Capital structuring service fees	6.2	12.6	9.0
Dividend income (excluding PIK dividend income)	293.0	286.0	250.0
PIK dividend income	2.0	4.0	2.0
Other income	5.9	5.4	6.0
Total investment income	484.0	513.0	505.0
REALIZED AND UNREALIZED GAINS (LOSSES) ON INVESTMENTS, FOREIGN CURRENCY AND OTHER TRANSACTIONS:
Net realized gains (losses):	56.4	23.5	1.0
Net unrealized gains (losses):	$ (74.1)	$ 84.7	$ 16.0