CONSOLIDATED INVESTMENT PRODUCTS - Net Assets (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents	$ 3,378.2	$ 2,649.8
Investments	3,325.2	3,000.5
Other assets	611.0	685.6
Total assets	14,341.8	13,472.0
Liabilities	2,288.6	2,021.9
Attributable to redeemable non-controlling interests	1,036.0	944.0	$ 594.1	$ 656.7
Consolidated T. Rowe Price investment products
Condensed Balance Sheet Statements, Captions [Line Items]
Attributable to T. Rowe Price Group	893.7	1,037.9
Attributable to redeemable non-controlling interests	1,036.0	944.0
Voting interest entities
Condensed Balance Sheet Statements, Captions [Line Items]
Attributable to T. Rowe Price Group	269.8	348.5
Attributable to redeemable non-controlling interests	78.0	124.0
Variable interest entities
Condensed Balance Sheet Statements, Captions [Line Items]
Total assets	438.7	467.7
Liabilities	5.8	0.4
Attributable to T. Rowe Price Group	623.9	689.4
Attributable to redeemable non-controlling interests	958.0	820.0
Reportable entities | Consolidated T. Rowe Price investment products
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents	39.1	63.1
Investments	1,885.5	1,936.2
Other assets	26.4	44.7
Total assets	1,951.0	2,044.0
Liabilities	21.3	62.1
Net assets	1,929.7	1,981.9
Reportable entities | Consolidated T. Rowe Price investment products | T. Rowe Price investment products
Condensed Balance Sheet Statements, Captions [Line Items]
Investments	61.7	9.3
Reportable entities | Consolidated T. Rowe Price investment products | T. Rowe Price investment products | Money market mutual funds
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents	2.5	4.9
Reportable entities | Voting interest entities
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents	3.0	7.2
Investments	344.3	470.8
Other assets	7.6	10.4
Total assets	354.9	488.4
Liabilities	7.1	15.9
Net assets	347.8	472.5
Reportable entities | Variable interest entities
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents	36.1	55.9
Investments	1,541.2	1,465.4
Other assets	18.8	34.3
Total assets	1,596.1	1,555.6
Liabilities	14.2	46.2
Net assets	$ 1,581.9	$ 1,509.4