XML 53 R42.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Revenue from Contracts with Customers Revenue from Contracts with Customers - By Product Type (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Revenue from Contracts with Customers - By Product Type [Line Items] |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | $ 255,993 | $ 272,796 | $ 519,845 | $ 546,297
Federated Funds [Member] |  |  |  |
Revenue from Contracts with Customers - By Product Type [Line Items] |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 218,396 |  | 443,213 |
Separate accounts [Member] |  |  |  |
Revenue from Contracts with Customers - By Product Type [Line Items] |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | $ 37,597 |  | $ 76,632 |

X
- Definition [Line Items] for Revenue from Contracts with Customers - By Product Type [Table] + References No definition available. + Details
Name: | fii_RevenuefromContractswithCustomersByProductTypeLineItems
Namespace Prefix: | fii_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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_ProductOrServiceAxis=fii_FederatedFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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