Supplemental Financial Information - Results of Operations (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Condensed Income Statements, Captions [Line Items]
Investment income	$ 1,965.2	$ (1,190.9)
Interest and other income	20.4	27.4
Interest and other income of Consolidated Funds	61.1	53.0
Total revenues	2,437.2	(745.7)
Compensation and benefits
Cash-based compensation and benefits	228.5	204.3
Equity-based compensation	32.4	29.1
Performance allocations and incentive fee related compensation	866.6	(442.5)
Total compensation and benefits	1,127.5	(209.1)
General, administrative and other expenses	91.7	69.6
Interest	23.0	23.9
Interest and other expenses of Consolidated Funds	42.4	45.6
Other non-operating expenses	0.6	0.2
Total expenses	1,285.2	(69.8)
Other income (loss)
Net investment income (loss) of Consolidated Funds	12.3	(113.1)
Income (loss) before provision for income taxes	1,164.3	(789.0)
Provision (benefit) for income taxes	273.4	(80.0)
Net income (loss)	890.9	(709.0)
Net income (loss) attributable to non-controlling interests in consolidated entities	21.6	(97.0)
Net income (loss) attributable to The Carlyle Group Inc.	869.3	(612.0)
Consolidated Operating Entities
Compensation and benefits
Equity-based compensation	32.4	29.1
Other income (loss)
Net income (loss)	891.0	(701.6)
Consolidated Entities and Consolidated Funds
Condensed Income Statements, Captions [Line Items]
Total revenues	61.1	53.0
Compensation and benefits
Total expenses	56.5	53.8
Other income (loss)
Net investment income (loss) of Consolidated Funds	12.3	(113.1)
Consolidated Entities and Consolidated Funds | Consolidated Operating Entities
Condensed Income Statements, Captions [Line Items]
Investment income	1,984.5	(1,300.8)
Interest and other income	26.4	33.8
Interest and other income of Consolidated Funds	0.0	0.0
Total revenues	2,407.2	(897.0)
Compensation and benefits
Cash-based compensation and benefits	228.5	204.3
Equity-based compensation	32.4	29.1
Performance allocations and incentive fee related compensation	866.6	(442.5)
Total compensation and benefits	1,127.5	(209.1)
General, administrative and other expenses	91.7	69.6
Interest	23.0	23.9
Interest and other expenses of Consolidated Funds	0.0	0.0
Other non-operating expenses	0.6	0.2
Total expenses	1,242.8	(115.4)
Other income (loss)
Net investment income (loss) of Consolidated Funds	0.0	0.0
Income (loss) before provision for income taxes	1,164.4	(781.6)
Provision (benefit) for income taxes	273.4	(80.0)
Net income (loss)	891.0	(701.6)
Net income (loss) attributable to non-controlling interests in consolidated entities	21.7	(89.6)
Net income (loss) attributable to The Carlyle Group Inc.	869.3	(612.0)
Consolidated Entities and Consolidated Funds | Consolidated Funds
Condensed Income Statements, Captions [Line Items]
Investment income	0.0	0.0
Interest and other income	0.0	0.0
Interest and other income of Consolidated Funds	61.1	53.0
Total revenues	61.1	53.0
Compensation and benefits
Cash-based compensation and benefits	0.0	0.0
Equity-based compensation	0.0	0.0
Performance allocations and incentive fee related compensation	0.0	0.0
Total compensation and benefits	0.0	0.0
General, administrative and other expenses	0.0	0.0
Interest	0.0	0.0
Interest and other expenses of Consolidated Funds	56.5	53.8
Other non-operating expenses	0.0	0.0
Total expenses	56.5	53.8
Other income (loss)
Net investment income (loss) of Consolidated Funds	12.3	(113.1)
Income (loss) before provision for income taxes	16.9	(113.9)
Provision (benefit) for income taxes	0.0	0.0
Net income (loss)	16.9	(113.9)
Net income (loss) attributable to non-controlling interests in consolidated entities	0.0	0.0
Net income (loss) attributable to The Carlyle Group Inc.	16.9	(113.9)
Eliminations
Condensed Income Statements, Captions [Line Items]
Investment income	(19.3)	109.9
Interest and other income	(6.0)	(6.4)
Interest and other income of Consolidated Funds	0.0	0.0
Total revenues	(31.1)	98.3
Compensation and benefits
Cash-based compensation and benefits	0.0	0.0
Equity-based compensation	0.0	0.0
Performance allocations and incentive fee related compensation	0.0	0.0
Total compensation and benefits	0.0	0.0
General, administrative and other expenses	0.0	0.0
Interest	0.0	0.0
Interest and other expenses of Consolidated Funds	(14.1)	(8.2)
Other non-operating expenses	0.0	0.0
Total expenses	(14.1)	(8.2)
Other income (loss)
Net investment income (loss) of Consolidated Funds	0.0	0.0
Income (loss) before provision for income taxes	(17.0)	106.5
Provision (benefit) for income taxes	0.0	0.0
Net income (loss)	(17.0)	106.5
Net income (loss) attributable to non-controlling interests in consolidated entities	(0.1)	(7.4)
Net income (loss) attributable to The Carlyle Group Inc.	(16.9)	113.9
Fund management fees
Condensed Income Statements, Captions [Line Items]
Fund management fees	381.0	355.9
Fund management fees | Consolidated Entities and Consolidated Funds | Consolidated Operating Entities
Condensed Income Statements, Captions [Line Items]
Fund management fees	386.8	361.1
Fund management fees | Consolidated Entities and Consolidated Funds | Consolidated Funds
Condensed Income Statements, Captions [Line Items]
Fund management fees	0.0	0.0
Fund management fees | Eliminations
Condensed Income Statements, Captions [Line Items]
Fund management fees	(5.8)	(5.2)
Incentive fees
Condensed Income Statements, Captions [Line Items]
Investment income	9.5	8.9
Incentive fees | Consolidated Entities and Consolidated Funds | Consolidated Operating Entities
Condensed Income Statements, Captions [Line Items]
Investment income	9.5	8.9
Incentive fees | Consolidated Entities and Consolidated Funds | Consolidated Funds
Condensed Income Statements, Captions [Line Items]
Investment income	0.0	0.0
Incentive fees | Eliminations
Condensed Income Statements, Captions [Line Items]
Investment income	0.0	0.0
Performance allocations
Condensed Income Statements, Captions [Line Items]
Investment income	1,786.1	(937.6)
Performance allocations | Consolidated Entities and Consolidated Funds | Consolidated Operating Entities
Condensed Income Statements, Captions [Line Items]
Investment income	1,786.1	(937.6)
Performance allocations | Consolidated Entities and Consolidated Funds | Consolidated Funds
Condensed Income Statements, Captions [Line Items]
Investment income	0.0	0.0
Performance allocations | Eliminations
Condensed Income Statements, Captions [Line Items]
Investment income	0.0	0.0
Principal investment income (loss)
Condensed Income Statements, Captions [Line Items]
Investment income	179.1	(253.3)
Principal investment income (loss) | Consolidated Entities and Consolidated Funds | Consolidated Operating Entities
Condensed Income Statements, Captions [Line Items]
Investment income	198.4	(363.2)
Principal investment income (loss) | Consolidated Entities and Consolidated Funds | Consolidated Funds
Condensed Income Statements, Captions [Line Items]
Investment income	0.0	0.0
Principal investment income (loss) | Eliminations
Condensed Income Statements, Captions [Line Items]
Investment income	$ (19.3)	$ 109.9