CONSOLIDATED SPONSORED INVESTMENT PRODUCTS - Operating Results (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Condensed Income Statements, Captions [Line Items]
Operating expenses reflected in net operating income	$ (4,474.3)	$ (4,114.7)	$ (3,961.9)
Income before income taxes	2,490.3	1,948.2	3,994.6
Net income (loss) attributable to redeemable non-controlling interests	47.0	(108.3)	15.6
Consolidated T. Rowe Price investment products
Condensed Income Statements, Captions [Line Items]
Income before income taxes	153.5	(211.7)	62.5
Net income (loss) attributable to T. Rowe Price Group	106.5	(103.4)	46.9
Net income (loss) attributable to redeemable non-controlling interests	47.0	(108.3)	15.6
Consolidated T. Rowe Price investment products \| Reportable entities
Condensed Income Statements, Captions [Line Items]
Operating expenses reflected in net operating income	(11.1)	(8.2)	(12.2)
Net gains (losses) reflected in non-operating income	164.6	(203.5)	74.7
Income before income taxes	153.5	(211.7)	62.5
VOE
Condensed Income Statements, Captions [Line Items]
Income before income taxes	48.7	(13.9)	17.4
Net income (loss) attributable to T. Rowe Price Group	40.9	(9.5)	11.4
Net income (loss) attributable to redeemable non-controlling interests	7.8	(4.4)	6.0
VOE \| Reportable entities
Condensed Income Statements, Captions [Line Items]
Operating expenses reflected in net operating income	(3.7)	(0.5)	(0.6)
Net gains (losses) reflected in non-operating income	52.4	(13.4)	18.0
Income before income taxes	48.7	(13.9)	17.4
VIE
Condensed Income Statements, Captions [Line Items]
Income before income taxes	104.8	(197.8)	45.1
Net income (loss) attributable to T. Rowe Price Group	65.6	(93.9)	35.5
Net income (loss) attributable to redeemable non-controlling interests	39.2	(103.9)	9.6
VIE \| Reportable entities
Condensed Income Statements, Captions [Line Items]
Operating expenses reflected in net operating income	(7.4)	(7.7)	(11.6)
Net gains (losses) reflected in non-operating income	112.2	(190.1)	56.7
Income before income taxes	$ 104.8	$ (197.8)	$ 45.1

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