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CONSOLIDATED SPONSORED INVESTMENT PRODUCTS - Net Assets (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | --- | ---
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |  |
Cash and cash equivalents | $ 2,066.6 | $ 1,755.6 |  |
Investments | 2,554.7 | 2,539.2 |  |
Other assets | 692.5 | 688.7 |  |
Total assets | 12,278.8 | 11,643.3 |  |
Liabilities | 1,987.6 | 1,956.4 |  |
Attributable to redeemable non-controlling interests | 594.1 | 656.7 | $ 982.3 | $ 1,561.7
VIE |  |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |  |
Total assets | 564.7 | 526.2 |  |
Liabilities | 1.9 | 15.8 |  |
Reportable entities | Consolidated T. Rowe Price investment products |  |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |  |
Cash and cash equivalents | 77.2 | 119.1 |  |
Investments | 1,847.0 | 1,460.8 |  |
Other assets | 35.1 | 23.5 |  |
Total assets | 1,959.3 | 1,603.4 |  |
Liabilities | 54.2 | 89.1 |  |
Net assets | 1,905.1 | 1,514.3 |  |
Attributable to T. Rowe Price Group | 1,311.0 | 857.6 |  |
Attributable to redeemable non-controlling interests | 594.1 | 656.7 |  |
Reportable entities | Consolidated T. Rowe Price investment products | Sponsored Investment Products |  |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |  |
Investments | 6.2 | 7.6 |  |
Reportable entities | Consolidated T. Rowe Price investment products | Sponsored Investment Products | Money market mutual funds |  |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |  |
Cash and cash equivalents | 16.2 | 2.6 |  |
Reportable entities | VOE |  |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |  |
Cash and cash equivalents | 25.7 | 16.2 |  |
Investments | 718.0 | 205.3 |  |
Other assets | 11.2 | 6.3 |  |
Total assets | 754.9 | 227.8 |  |
Liabilities | 19.0 | 50.0 |  |
Net assets | 735.9 | 177.8 |  |
Attributable to T. Rowe Price Group | 589.9 | 142.4 |  |
Attributable to redeemable non-controlling interests | 146.0 | 35.4 |  |
Reportable entities | VIE |  |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |  |
Cash and cash equivalents | 51.5 | 102.9 |  |
Investments | 1,129.0 | 1,255.5 |  |
Other assets | 23.9 | 17.2 |  |
Total assets | 1,204.4 | 1,375.6 |  |
Liabilities | 35.2 | 39.1 |  |
Net assets | 1,169.2 | 1,336.5 |  |
Attributable to T. Rowe Price Group | 721.1 | 715.2 |  |
Attributable to redeemable non-controlling interests | $ 448.1 | $ 621.3 |  |

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