Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	9 Months Ended		12 Months Ended
	Sep. 30, 2022		Dec. 31, 2021
Amortized cost	$ 16,677.7	[1]	$ 16,056.7	[2]
Foreign currency, cost	2.0		119.0
Debt financing costs	$ 38.0		$ 36.0
Preferred stock, par value (in dollars per share)	$ 0.001		$ 0.001
Preferred stock, shares authorized	50,000,000		50,000,000
Preferred stock, shares issued	0		0
Preferred stock, shares outstanding	0		0
Common stock, par value (in dollars per share)	$ 0.001		$ 0.001
Common stock, shares authorized	750,000,000		750,000,000
Common stock, shares issued	282,978,008		284,543,091
Common stock, shares outstanding	282,978,008		284,543,091
Non-controlled/unaffiliated investments
Amortized cost	$ 12,988.0		$ 12,419.0
Non-controlled/affiliated investments
Amortized cost	579.0		860.0
Controlled/affiliated investments
Amortized cost	$ 3,111.0		$ 2,778.0

[1] Security may be an obligation of one or more entities affiliated with the named company

[2] Security may be an obligation of one or more entities affiliated with the named company.