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GOODWILL AND INTANGIBLE ASSETS - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2024 | Mar. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |  |
Acquisition-related amortization and impairment costs | $ 25.5 | $ 26.0

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- Definition Amortization Of Acquisition Costs, Including Step-Up Adjustments + References No definition available. + Details
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Namespace Prefix: | trow_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration