Investments - Principal Investments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Total	$ 3,024.1	$ 2,922.0
Statement of operations information
Investment income	44.8	1,898.0	$ 6,721.9
Expenses	3,571.7	2,824.7	4,757.1
Net income (loss)	(496.7)	1,284.7	3,045.2
Balance sheet information
Investments	9,955.3	10,767.9
Total assets	21,176.0	21,403.0	21,250.4
Other liabilities	275.9	362.5
Total liabilities	15,391.5	14,581.7
Total investments in NGP
Segment Reporting Information [Line Items]
Total	916.2	1,015.7
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Statement of operations information
Investment income	6,225.0	5,048.2	3,844.1
Expenses	4,578.4	3,882.6	3,484.1
Net investment income (loss)	1,646.6	1,165.6	360.0
Net realized and unrealized gain (loss)	7,364.1	13,517.9	38,386.4
Net income (loss)	9,010.7	14,683.5	38,746.4
Balance sheet information
Investments	169,521.2	172,011.9
Total assets	179,076.1	176,502.8
Debt	17,261.6	23,336.3
Other liabilities	4,256.7	2,581.9
Total liabilities	21,518.3	25,918.2
Partners’ capital	157,557.8	150,584.6
Global Private Equity
Segment Reporting Information [Line Items]
Total	1,798.3	1,853.5
Global Private Equity | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Statement of operations information
Investment income	2,652.7	3,129.1	1,736.4
Expenses	2,320.4	2,151.6	1,511.4
Net investment income (loss)	332.3	977.5	225.0
Net realized and unrealized gain (loss)	2,980.0	10,643.7	26,875.3
Net income (loss)	3,312.2	11,621.2	27,100.3
Balance sheet information
Investments	102,536.5	115,130.1
Total assets	106,116.6	118,731.6
Debt	8,355.4	15,924.8
Other liabilities	1,329.3	1,338.3
Total liabilities	9,684.7	17,263.1
Partners’ capital	96,431.9	101,468.5
Global Credit
Segment Reporting Information [Line Items]
Total	987.4	974.2
Global Credit | Fortitude Holdings
Segment Reporting Information [Line Items]
Total	595.4	646.0
Global Credit | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Statement of operations information
Investment income	3,497.5	1,803.9	2,000.5
Expenses	1,019.5	591.8	448.5
Net investment income (loss)	2,478.0	1,212.1	1,552.0
Net realized and unrealized gain (loss)	224.7	(1.9)	918.1
Net income (loss)	2,702.7	1,210.2	2,470.1
Balance sheet information
Investments	26,814.0	24,555.6
Total assets	32,803.3	25,476.7
Debt	6,601.0	5,150.3
Other liabilities	777.7	418.0
Total liabilities	7,378.7	5,568.3
Partners’ capital	25,424.6	19,908.4
Global Investment Solutions
Segment Reporting Information [Line Items]
Total	238.4	94.3
Global Investment Solutions | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Statement of operations information
Investment income	74.8	115.2	107.2
Expenses	1,238.5	1,139.2	1,524.2
Net investment income (loss)	(1,163.7)	(1,024.0)	(1,417.0)
Net realized and unrealized gain (loss)	4,159.4	2,876.1	10,593.0
Net income (loss)	2,995.7	1,852.1	$ 9,176.0
Balance sheet information
Investments	40,170.7	32,326.2
Total assets	40,156.2	32,294.5
Debt	2,305.2	2,261.2
Other liabilities	2,149.7	825.6
Total liabilities	4,454.9	3,086.8
Partners’ capital	$ 35,701.3	$ 29,207.7