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CONSOLIDATED INVESTMENT PRODUCTS - Net Assets (Details) - USD ($) $ in Millions | Jun. 30, 2025 | Mar. 31, 2025 | Dec. 31, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | --- | --- | --- | --- | ---
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |  |  |  |
Cash and cash equivalents | $ 3,058.9 |  | $ 2,649.8 |  |  |
Investments | 3,359.9 |  | 3,000.5 |  |  |
Other assets | 712.8 |  | 685.6 |  |  |
Total assets | 14,342.2 |  | 13,472.0 |  |  |
Liabilities | 2,529.3 |  | 2,021.9 |  |  |
Attributable to redeemable non-controlling interests | 1,099.1 | $ 977.2 | 944.0 | $ 689.0 | $ 676.7 | $ 594.1
Consolidated T. Rowe Price investment products |  |  |  |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |  |  |  |
Attributable to T. Rowe Price Group, Inc. | 808.4 |  | 1,037.9 |  |  |
Attributable to redeemable non-controlling interests |  |  | 944.0 |  |  |
Voting interest entities |  |  |  |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |  |  |  |
Attributable to T. Rowe Price Group, Inc. | 107.4 |  | 348.5 |  |  |
Attributable to redeemable non-controlling interests | 19.0 |  | 124.0 |  |  |
Variable interest entities |  |  |  |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |  |  |  |
Total assets | 414.0 |  | 467.7 |  |  |
Liabilities | 0.7 |  | 0.4 |  |  |
Attributable to T. Rowe Price Group, Inc. | 701.0 |  | 689.4 |  |  |
Attributable to redeemable non-controlling interests | 1,080.1 |  | 820.0 |  |  |
Reportable entities | Consolidated T. Rowe Price investment products |  |  |  |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |  |  |  |
Cash and cash equivalents | 71.6 |  | 63.1 |  |  |
Investments | 1,849.0 |  | 1,936.2 |  |  |
Other assets | 68.4 |  | 44.7 |  |  |
Total assets | 1,989.0 |  | 2,044.0 |  |  |
Liabilities | 81.5 |  | 62.1 |  |  |
Net assets | 1,907.5 |  | 1,981.9 |  |  |
Reportable entities | Consolidated T. Rowe Price investment products | T. Rowe Price investment products |  |  |  |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |  |  |  |
Investments | 15.4 |  | 9.3 |  |  |
Reportable entities | Consolidated T. Rowe Price investment products | Money Market Funds | T. Rowe Price investment products |  |  |  |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |  |  |  |
Cash and cash equivalents | 0.9 |  | 4.9 |  |  |
Reportable entities | Voting interest entities |  |  |  |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |  |  |  |
Cash and cash equivalents | 1.2 |  | 7.2 |  |  |
Investments | 124.9 |  | 470.8 |  |  |
Other assets | 1.2 |  | 10.4 |  |  |
Total assets | 127.3 |  | 488.4 |  |  |
Liabilities | 0.9 |  | 15.9 |  |  |
Net assets | 126.4 |  | 472.5 |  |  |
Reportable entities | Variable interest entities |  |  |  |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |  |  |  |
Cash and cash equivalents | 70.4 |  | 55.9 |  |  |
Investments | 1,724.1 |  | 1,465.4 |  |  |
Other assets | 67.2 |  | 34.3 |  |  |
Total assets | 1,861.7 |  | 1,555.6 |  |  |
Liabilities | 80.6 |  | 46.2 |  |  |
Net assets | $ 1,781.1 |  | $ 1,509.4 |  |  |

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