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INVESTMENTS - Variable Interest Entities Narrative (Details) - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021
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Variable interest entity, not primary beneficiary |  |
Variable Interest Entity [Line Items] |  |
Unfunded capital commitments | $ 110.4 | $ 94.2

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- Definition Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Unfunded Capital Commitments, Amount + References No definition available. + Details
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Namespace Prefix: | trow_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_VariableInterestEntityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_ConsolidatedEntitiesAxis=us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |