CONSOLIDATED T. ROWE PRICE INVESTMENT PRODUCTS AND OTHER ENTITIES - Operating Results (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Condensed Income Statements, Captions [Line Items]
Operating expenses reflected in net operating income	$ (1,013.6)	$ (957.9)	$ (2,843.6)	$ (2,862.7)
Income before income taxes	491.8	984.7	1,559.4	3,082.0
Net income (loss) attributable to redeemable non-controlling interests	(26.6)	(19.8)	(131.9)	22.6
Consolidated T. Rowe Price investment products
Condensed Income Statements, Captions [Line Items]
Income before income taxes	(43.6)	(19.9)	(254.0)	66.5
Net income (loss) attributable to T. Rowe Price	(17.0)	(0.1)	(122.1)	43.9
Net income (loss) attributable to redeemable non-controlling interests	(26.6)	(19.8)	(131.9)	22.6
Consolidated T. Rowe Price investment products \| Reportable entities
Condensed Income Statements, Captions [Line Items]
Operating expenses reflected in net operating income	(1.8)	(2.8)	(6.2)	(9.1)
Net investment income (loss) reflected in non-operating income (loss)	(41.8)	(17.1)	(247.8)	75.6
Income before income taxes	(43.6)	(19.9)	(254.0)	66.5
Voting interest entities
Condensed Income Statements, Captions [Line Items]
Income before income taxes	(1.8)	0.6	(16.8)	13.7
Net income (loss) attributable to T. Rowe Price	(1.1)	0.5	(11.4)	8.8
Net income (loss) attributable to redeemable non-controlling interests	(0.7)	0.1	(5.4)	4.9
Voting interest entities \| Reportable entities
Condensed Income Statements, Captions [Line Items]
Operating expenses reflected in net operating income	0.0	(0.1)	(0.3)	(0.4)
Net investment income (loss) reflected in non-operating income (loss)	(1.8)	0.7	(16.5)	14.1
Income before income taxes	(1.8)	0.6	(16.8)	13.7
Variable interest entities
Condensed Income Statements, Captions [Line Items]
Income before income taxes	(41.8)	(20.5)	(237.2)	52.8
Net income (loss) attributable to T. Rowe Price	(15.9)	(0.6)	(110.7)	35.1
Net income (loss) attributable to redeemable non-controlling interests	(25.9)	(19.9)	(126.5)	17.7
Variable interest entities \| Reportable entities
Condensed Income Statements, Captions [Line Items]
Operating expenses reflected in net operating income	(1.8)	(2.7)	(5.9)	(8.7)
Net investment income (loss) reflected in non-operating income (loss)	(40.0)	(17.8)	(231.3)	61.5
Income before income taxes	$ (41.8)	$ (20.5)	$ (237.2)	$ 52.8

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