XML 52 R42.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Commitments and Contingencies (Details) $ in Millions | Sep. 30, 2017 USD ($)
--- | ---
Employee Incentive Compensation Maximum Bonus Payable Over Remaining Terms | $ 8.0
Employment-related Commitments [Member] |
Unrecorded Unconditional Purchase Obligation | $ 6.0

X
- Definition The aggregate maximum bonus payable to employees over the remaining terms of incentive compensation-related contracts. + References No definition available. + Details
Name: | fii_EmployeeIncentiveCompensationMaximumBonusPayableOverRemainingTerms
Namespace Prefix: | fii_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77896938&loc=d3e25336-109308 + Details
Name: | us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis=fii_EmploymentRelatedCommitmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |