Investments - Principal Investments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Total	$ 2,922.0	$ 2,128.6
Statement of operations information
Investment income	1,898.0	6,721.9	$ 1,095.2
Expenses	2,824.7	4,757.1	2,333.3
Net income	1,284.7	3,045.2	382.8
Balance sheet information
Investments	10,767.9	10,832.0
Total assets	21,403.0	21,250.4	15,644.8
Total liabilities	14,581.7	15,544.2
Total investments in NGP
Segment Reporting Information [Line Items]
Total	1,015.7	436.9
Fortitude Holdings
Segment Reporting Information [Line Items]
Total	646.0	715.7
IStar
Segment Reporting Information [Line Items]
Total	176.6
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Statement of operations information
Investment income	5,048.2	3,844.1	1,715.4
Expenses	3,882.6	3,484.1	2,908.1
Net investment income (loss)	1,165.6	360.0	(1,192.7)
Net realized and unrealized gain (loss)	13,517.9	38,386.4	11,246.6
Net income	14,683.5	38,746.4	10,053.9
Balance sheet information
Investments	172,011.9	146,560.8
Total assets	176,502.8	154,715.7
Debt	23,336.3	17,580.3
Other liabilities	2,581.9	1,884.4
Total liabilities	25,918.2	19,464.7
Partners’ capital	150,584.6	135,251.0
Global Private Equity
Segment Reporting Information [Line Items]
Total	1,853.5	1,231.2
Global Private Equity | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Statement of operations information
Investment income	3,129.1	1,736.4	652.7
Expenses	2,151.6	1,511.4	1,702.2
Net investment income (loss)	977.5	225.0	(1,049.5)
Net realized and unrealized gain (loss)	10,643.7	26,875.3	7,889.4
Net income	11,621.2	27,100.3	6,839.9
Balance sheet information
Investments	115,130.1	96,269.1
Total assets	118,731.6	103,063.3
Debt	15,924.8	10,552.6
Other liabilities	1,338.3	1,199.8
Total liabilities	17,263.1	11,752.4
Partners’ capital	101,468.5	91,310.9
Global Credit
Segment Reporting Information [Line Items]
Total	974.2	819.7
Global Credit | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Statement of operations information
Investment income	1,803.9	2,000.5	1,012.2
Expenses	591.8	448.5	240.7
Net investment income (loss)	1,212.1	1,552.0	771.5
Net realized and unrealized gain (loss)	(1.9)	918.1	(682.5)
Net income	1,210.2	2,470.1	89.0
Balance sheet information
Investments	24,555.6	19,745.8
Total assets	25,476.7	21,135.4
Debt	5,150.3	5,186.6
Other liabilities	418.0	282.4
Total liabilities	5,568.3	5,469.0
Partners’ capital	19,908.4	15,666.4
Global Investment Solutions
Segment Reporting Information [Line Items]
Total	94.3	77.7
Global Investment Solutions | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Statement of operations information
Investment income	115.2	107.2	50.5
Expenses	1,139.2	1,524.2	965.2
Net investment income (loss)	(1,024.0)	(1,417.0)	(914.7)
Net realized and unrealized gain (loss)	2,876.1	10,593.0	4,039.7
Net income	1,852.1	9,176.0	$ 3,125.0
Balance sheet information
Investments	32,326.2	30,545.9
Total assets	32,294.5	30,517.0
Debt	2,261.2	1,841.1
Other liabilities	825.6	402.2
Total liabilities	3,086.8	2,243.3
Partners’ capital	$ 29,207.7	$ 28,273.7