Investments - Principal Investment Income (Loss) from Equity Method Investments (Details) - USD ($) $ in Millions	1 Months Ended		12 Months Ended
	Dec. 31, 2022	May 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule of Investments [Line Items]
Total	$ 2,922.0		$ 2,922.0	$ 2,128.6
Fortitude Holdings
Schedule of Investments [Line Items]
Investment income (loss)					$ 620.7
Total	646.0		646.0	715.7
Carlyle FRL
Schedule of Investments [Line Items]
Investment loss	121.0	$ 176.9	176.9
Total	646.0		$ 646.0
Carlyle FRL | Fortitude Holdings | Maximum
Schedule of Investments [Line Items]
Percentage ownership		19.90%	19.90%
Carlyle FRL | Fortitude Holdings | Minimum
Schedule of Investments [Line Items]
Percentage ownership		13.50%	13.50%
Global Private Equity
Schedule of Investments [Line Items]
Total	1,853.5		$ 1,853.5	1,231.2
Global Credit
Schedule of Investments [Line Items]
Total	974.2		974.2	819.7
Global Investment Solutions
Schedule of Investments [Line Items]
Total	$ 94.3		94.3	77.7
Principal investment income (loss) from equity method investments
Schedule of Investments [Line Items]
Investment income (loss)			619.5	557.0	(543.8)
Principal investment income (loss) from equity method investments | Global Private Equity
Schedule of Investments [Line Items]
Investment income (loss)			744.8	346.7	137.1
Principal investment income (loss) from equity method investments | Global Credit
Schedule of Investments [Line Items]
Investment income (loss)			(134.8)	183.4	(690.4)
Principal investment income (loss) from equity method investments | Global Investment Solutions
Schedule of Investments [Line Items]
Investment income (loss)			$ 9.5	$ 26.9	$ 9.5