XML 55 R43.htm IDEA: XBRL DOCUMENT
v3.10.0.1

INFORMATION ABOUT RECEIVABLES, REVENUES, AND SERVICES. (Investment Advisory Services) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Revenue and Services [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues | $ 1,305.0 | $ 1,394.6 | $ 1,345.0 | $ 1,328.0 | $ 1,297.6 | $ 1,238.7 | $ 1,186.0 | $ 1,132.6 | $ 5,372.6 | $ 4,854.9 | $ 4,284.8
Average assets under management |  |  |  |  |  |  |  |  | 1,036,500.0 | 909,000.0 | 778,200.0
Period end assets under management | 962,300.0 |  |  |  | 991,100.0 |  |  |  | 962,300.0 | 991,100.0 |
T. Rowe Price U.S. mutual funds [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue and Services [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 3,815.2 | 3,560.6 | 3,183.3
Average assets under management |  |  |  |  |  |  |  |  | 621,800.0 | 568,500.0 | 495,500.0
Period end assets under management | 564,500.0 |  |  |  | 606,300.0 |  |  |  | 564,500.0 | 606,300.0 |
T. Rowe Price U.S. mutual funds [Member] | Stock and blended asset [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue and Services [Line Items] |  |  |  |  |  |  |  |  |  |  |
Average assets under management |  |  |  |  |  |  |  |  | 493,600.0 | 447,500.0 | 386,100.0
Period end assets under management | 441,100.0 |  |  |  | 480,500.0 |  |  |  | 441,100.0 | 480,500.0 |
T. Rowe Price U.S. mutual funds [Member] | Bond and money market [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue and Services [Line Items] |  |  |  |  |  |  |  |  |  |  |
Average assets under management |  |  |  |  |  |  |  |  | 128,200.0 | 121,000.0 | 109,400.0
Period end assets under management | 123,400.0 |  |  |  | 125,800.0 |  |  |  | 123,400.0 | 125,800.0 |
Subadvised and separate accounts and other investment product [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue and Services [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 1,475.6 | 1,215.8 | 1,023.3
Average assets under management |  |  |  |  |  |  |  |  | 414,700.0 | 340,500.0 | 282,700.0
Period end assets under management | 397,800.0 |  |  |  | 384,800.0 |  |  |  | 397,800.0 | 384,800.0 |
Subadvised and separate accounts and other investment product [Member] | Stock and blended asset [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue and Services [Line Items] |  |  |  |  |  |  |  |  |  |  |
Average assets under management |  |  |  |  |  |  |  |  | 317,300.0 | 256,400.0 | 211,100.0
Period end assets under management | 299,200.0 |  |  |  | 291,900.0 |  |  |  | 299,200.0 | 291,900.0 |
Subadvised and separate accounts and other investment product [Member] | Bond and money market [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue and Services [Line Items] |  |  |  |  |  |  |  |  |  |  |
Average assets under management |  |  |  |  |  |  |  |  | 97,400.0 | 84,100.0 | 71,600.0
Period end assets under management | $ 98,600.0 |  |  |  | $ 92,900.0 |  |  |  | 98,600.0 | 92,900.0 |
Other clients [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue and Services [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 81.8 | 78.5 | 78.2
Investment advisory fees [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue and Services [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 4,850.6 | 4,295.8 | 3,735.0
Investment advisory fees [Member] | T. Rowe Price U.S. mutual funds [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue and Services [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 3,375.0 | 3,080.0 | 2,711.7
Investment advisory fees [Member] | T. Rowe Price U.S. mutual funds [Member] | Stock and blended asset [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue and Services [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 2,858.1 | 2,571.7 | 2,228.7
Investment advisory fees [Member] | T. Rowe Price U.S. mutual funds [Member] | Bond and money market [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue and Services [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 516.9 | 508.3 | 483.0
Investment advisory fees [Member] | Subadvised and separate accounts and other investment product [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue and Services [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 1,475.6 | 1,215.8 | 1,023.3
Investment advisory fees [Member] | Subadvised and separate accounts and other investment product [Member] | Stock and blended asset [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue and Services [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 1,236.8 | 1,009.4 | 850.3
Investment advisory fees [Member] | Subadvised and separate accounts and other investment product [Member] | Bond and money market [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue and Services [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 238.8 | 206.4 | 173.0
Investment advisory fees [Member] | Other clients [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue and Services [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 0.0
Administrative fees [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue and Services [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 384.0 | 412.1 | 408.1
Administrative fees [Member] | T. Rowe Price U.S. mutual funds [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue and Services [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 302.2 | 333.6 | 329.9
Administrative fees [Member] | Subadvised and separate accounts and other investment product [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue and Services [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 0.0
Administrative fees [Member] | Other clients [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue and Services [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 81.8 | 78.5 | 78.2
Distribution and servicing fees [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue and Services [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 138.0 | 147.0 | 141.7
Distribution and servicing fees [Member] | T. Rowe Price U.S. mutual funds [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue and Services [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 138.0 | 147.0 | 141.7
Distribution and servicing fees [Member] | Subadvised and separate accounts and other investment product [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue and Services [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 0.0
Distribution and servicing fees [Member] | Other clients [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue and Services [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | $ 0.0 | $ 0.0 | $ 0.0

X
- 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: | trow_RevenuesAndServicesLineItems
Namespace Prefix: | trow_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The average carrying amount of assets managed during the period by the investment advisor on behalf of investors. + References No definition available. + Details
Name: | us-gaap_AssetsUnderManagementAverageBalance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The carrying amount of assets an investment adviser manages on behalf of investors. + References No definition available. + Details
Name: | us-gaap_AssetsUnderManagementCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
Name: | us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | srt_MajorCustomersAxis=trow_SponsoredMutualFundsInUSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=trow_StockAndBlendedAssetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=trow_BondAndMoneyMarketMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=trow_SubadvisedSeparateAccountsAndOtherInvestmentProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=trow_OtherClientsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_AssetManagement1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_AdministrativeServiceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_DistributionServiceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |