Supplemental Financial Information - Results of Operations (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Condensed Income Statements, Captions [Line Items]
Investment income	$ 1,134.9	$ 584.1	$ 5,318.5	$ 72.4
Interest and other income	21.9	21.3	63.3	64.5
Interest and other income of Consolidated Funds	62.1	56.3	185.3	164.5
Total revenues	1,639.5	1,034.6	6,783.0	1,419.9
Compensation and benefits
Cash-based compensation and benefits	224.9	222.2	685.2	639.0
Equity-based compensation	42.4	18.7	122.0	78.3
Performance allocations and incentive fee related compensation	495.2	250.6	2,355.8	343.7
Total compensation and benefits	762.5	491.5	3,163.0	1,061.0
General, administrative and other expenses	99.6	91.1	300.4	240.9
Interest	27.9	23.0	76.4	72.8
Interest and other expenses of Consolidated Funds	44.6	37.2	133.5	122.1
Other non-operating expenses	3.5	0.6	1.0	1.3
Total expenses	938.1	643.4	3,674.3	1,498.1
Other income (loss)
Net investment income (loss) of Consolidated Funds	(0.1)	23.9	9.6	(38.9)
Income (loss) before provision for income taxes	701.3	415.1	3,118.3	(117.1)
Provision for income taxes	153.9	82.4	733.5	54.7
Net income (loss)	547.4	332.7	2,384.8	(171.8)
Net income (loss) attributable to non-controlling interests in consolidated entities	14.6	37.2	57.7	(1.2)
Net income (loss) attributable to The Carlyle Group Inc.	532.8	295.5	2,327.1	(170.6)
Consolidated Operating Entities
Compensation and benefits
Equity-based compensation			122.0	78.3
Other income (loss)
Net income (loss)			2,383.9	(178.0)
Consolidated Entities and Consolidated Funds
Condensed Income Statements, Captions [Line Items]
Total revenues	62.1	56.3	185.3	164.5
Compensation and benefits
Total expenses	51.9	47.9	162.6	148.8
Other income (loss)
Net investment income (loss) of Consolidated Funds	(0.1)	23.9	9.6	(38.9)
Consolidated Entities and Consolidated Funds | Consolidated Operating Entities
Condensed Income Statements, Captions [Line Items]
Investment income	1,139.7	615.6	5,344.4	43.6
Interest and other income	27.0	23.9	79.3	73.7
Interest and other income of Consolidated Funds	0.0	0.0	0.0	0.0
Total revenues	1,594.1	1,018.6	6,658.2	1,252.8
Compensation and benefits
Cash-based compensation and benefits	224.9	222.2	685.2	639.0
Equity-based compensation	42.4	18.7	122.0	78.3
Performance allocations and incentive fee related compensation	495.2	250.6	2,355.8	343.7
Total compensation and benefits	762.5	491.5	3,163.0	1,061.0
General, administrative and other expenses	99.6	91.2	300.4	241.0
Interest	27.9	23.0	76.4	72.8
Interest and other expenses of Consolidated Funds	0.0	0.0	0.0	0.0
Other non-operating expenses	3.5	0.6	1.0	1.3
Total expenses	893.5	606.3	3,540.8	1,376.1
Other income (loss)
Net investment income (loss) of Consolidated Funds	0.0	0.0	0.0	0.0
Income (loss) before provision for income taxes	700.6	412.3	3,117.4	(123.3)
Provision for income taxes	153.9	82.4	733.5	54.7
Net income (loss)	546.7	329.9	2,383.9	(178.0)
Net income (loss) attributable to non-controlling interests in consolidated entities	13.9	34.4	56.8	(7.4)
Net income (loss) attributable to The Carlyle Group Inc.	532.8	295.5	2,327.1	(170.6)
Consolidated Entities and Consolidated Funds | Consolidated Funds
Condensed Income Statements, Captions [Line Items]
Investment income	0.0	0.0	0.0	0.0
Interest and other income	0.0	0.0	0.0	0.0
Interest and other income of Consolidated Funds	62.1	56.3	185.3	164.5
Total revenues			185.3	164.5
Compensation and benefits
Cash-based compensation and benefits	0.0	0.0	0.0	0.0
Equity-based compensation	0.0	0.0	0.0	0.0
Performance allocations and incentive fee related compensation	0.0	0.0	0.0	0.0
Total compensation and benefits	0.0	0.0	0.0	0.0
General, administrative and other expenses	0.0	0.0	0.0	0.0
Interest	0.0	0.0	0.0	0.0
Interest and other expenses of Consolidated Funds	51.9	47.9	162.6	148.8
Other non-operating expenses	0.0	0.0	0.0	0.0
Total expenses			162.6	148.8
Other income (loss)
Net investment income (loss) of Consolidated Funds			9.6	(38.9)
Income (loss) before provision for income taxes	10.1	32.3	32.3	(23.2)
Provision for income taxes	0.0	0.0	0.0	0.0
Net income (loss)	10.1	32.3	32.3	(23.2)
Net income (loss) attributable to non-controlling interests in consolidated entities	0.0	0.0	0.0	0.0
Net income (loss) attributable to The Carlyle Group Inc.	10.1	32.3	32.3	(23.2)
Eliminations
Condensed Income Statements, Captions [Line Items]
Investment income	(4.8)	(31.5)	(25.9)	28.8
Interest and other income	(5.1)	(2.6)	(16.0)	(9.2)
Interest and other income of Consolidated Funds	0.0	0.0	0.0	0.0
Total revenues	(16.7)	(40.3)	(60.5)	2.6
Compensation and benefits
Cash-based compensation and benefits	0.0	0.0	0.0	0.0
Equity-based compensation	0.0	0.0	0.0	0.0
Performance allocations and incentive fee related compensation	0.0	0.0	0.0	0.0
Total compensation and benefits	0.0	0.0	0.0	0.0
General, administrative and other expenses	0.0	(0.1)	0.0	(0.1)
Interest	0.0	0.0	0.0	0.0
Interest and other expenses of Consolidated Funds	(7.3)	(10.7)	(29.1)	(26.7)
Other non-operating expenses	0.0	0.0	0.0	0.0
Total expenses	(7.3)	(10.8)	(29.1)	(26.8)
Other income (loss)
Net investment income (loss) of Consolidated Funds	0.0	0.0	0.0	0.0
Income (loss) before provision for income taxes	(9.4)	(29.5)	(31.4)	29.4
Provision for income taxes	0.0	0.0	0.0	0.0
Net income (loss)	(9.4)	(29.5)	(31.4)	29.4
Net income (loss) attributable to non-controlling interests in consolidated entities	0.7	2.8	0.9	6.2
Net income (loss) attributable to The Carlyle Group Inc.	(10.1)	(32.3)	(32.3)	23.2
Fund management fees
Condensed Income Statements, Captions [Line Items]
Fund management fees and incentive fees	407.5	363.8	1,182.9	1,091.5
Fund management fees | Consolidated Entities and Consolidated Funds | Consolidated Operating Entities
Condensed Income Statements, Captions [Line Items]
Fund management fees and incentive fees	414.3	370.0	1,201.5	1,108.5
Fund management fees | Consolidated Entities and Consolidated Funds | Consolidated Funds
Condensed Income Statements, Captions [Line Items]
Fund management fees and incentive fees	0.0	0.0	0.0	0.0
Fund management fees | Eliminations
Condensed Income Statements, Captions [Line Items]
Fund management fees and incentive fees	(6.8)	(6.2)	(18.6)	(17.0)
Incentive fees
Condensed Income Statements, Captions [Line Items]
Fund management fees and incentive fees	13.1	9.1	33.0	27.0
Incentive fees | Consolidated Entities and Consolidated Funds | Consolidated Operating Entities
Condensed Income Statements, Captions [Line Items]
Fund management fees and incentive fees	13.1	9.1	33.0	27.0
Incentive fees | Consolidated Entities and Consolidated Funds | Consolidated Funds
Condensed Income Statements, Captions [Line Items]
Fund management fees and incentive fees	0.0	0.0	0.0	0.0
Incentive fees | Eliminations
Condensed Income Statements, Captions [Line Items]
Fund management fees and incentive fees	0.0	0.0	0.0	0.0
Performance allocations
Condensed Income Statements, Captions [Line Items]
Investment income	974.5	477.4	4,841.3	731.6
Performance allocations | Consolidated Entities and Consolidated Funds | Consolidated Operating Entities
Condensed Income Statements, Captions [Line Items]
Investment income	974.5	477.4	4,841.3	731.6
Performance allocations | Consolidated Entities and Consolidated Funds | Consolidated Funds
Condensed Income Statements, Captions [Line Items]
Investment income	0.0	0.0	0.0	0.0
Performance allocations | Eliminations
Condensed Income Statements, Captions [Line Items]
Investment income	0.0	0.0	0.0	0.0
Principal investment income (loss)
Condensed Income Statements, Captions [Line Items]
Investment income	160.4	106.7	477.2	(659.2)
Principal investment income (loss) | Consolidated Entities and Consolidated Funds | Consolidated Operating Entities
Condensed Income Statements, Captions [Line Items]
Investment income	165.2	138.2	503.1	(688.0)
Principal investment income (loss) | Consolidated Entities and Consolidated Funds | Consolidated Funds
Condensed Income Statements, Captions [Line Items]
Investment income	0.0	0.0	0.0	0.0
Principal investment income (loss) | Eliminations
Condensed Income Statements, Captions [Line Items]
Investment income	$ (4.8)	$ (31.5)	$ (25.9)	$ 28.8