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CONSOLIDATED T. ROWE PRICE INVESTMENT PRODUCTS - Operating Results (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Condensed Income Statements, Captions [Line Items]
Operating expenses reflected in net operating income	$ (3,961.9)	$ (3,461.0)	$ (3,230.9)
Income before income taxes	3,994.6	3,242.2	2,927.3
Net income (loss) attributable to redeemable non-controlling interests	15.6	150.6	117.6
Consolidated T. Rowe Price investment products
Condensed Income Statements, Captions [Line Items]
Income before income taxes	62.5	235.3	258.2
Net income (loss) attributable to T. Rowe Price Group	15.6	84.7	140.6
Net income (loss) attributable to redeemable non-controlling interests	46.9	150.6	117.6
Consolidated T. Rowe Price investment products | Reportable entities
Condensed Income Statements, Captions [Line Items]
Operating expenses reflected in net operating income	(12.2)	(16.4)	(14.7)
Net gains (losses) reflected in non-operating income	74.7	251.7	272.9
Income before income taxes	62.5	235.3	258.2
VOE
Condensed Income Statements, Captions [Line Items]
Income before income taxes	17.4	11.6	28.8
Net income (loss) attributable to T. Rowe Price Group	6.0	11.6	21.3
Net income (loss) attributable to redeemable non-controlling interests	11.4	0.0	7.5
VOE | Reportable entities
Condensed Income Statements, Captions [Line Items]
Operating expenses reflected in net operating income	(0.6)	(1.6)	(2.2)
Net gains (losses) reflected in non-operating income	18.0	13.2	31.0
Income before income taxes	17.4	11.6	28.8
VIE
Condensed Income Statements, Captions [Line Items]
Income before income taxes	45.1	223.7	229.4
Net income (loss) attributable to T. Rowe Price Group	9.6	73.1	119.3
Net income (loss) attributable to redeemable non-controlling interests	35.5	150.6	110.1
VIE | Reportable entities
Condensed Income Statements, Captions [Line Items]
Operating expenses reflected in net operating income	(11.6)	(14.8)	(12.5)
Net gains (losses) reflected in non-operating income	56.7	238.5	241.9
Income before income taxes	$ 45.1	$ 223.7	$ 229.4

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