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v3.20.2

Segment Information - Additional Information (Details) | 6 Months Ended
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Jun. 30, 2020 continent country segment ft
Segment Reporting Information [Line Items] |
Number of reportable segments | segment | 3
Maximum |
Segment Reporting Information [Line Items] |
Length of tubular assemblies (in feet) | ft | 400
Tubular Running Services |
Segment Reporting Information [Line Items] |
Number of countries in which entity operates | country | 50
Number of continents in which entity operates | continent | 6

X
- Definition Length Of Tubular Assemblies + References No definition available. + Details
Name: | fi_LengthOfTubularAssemblies
Namespace Prefix: | fi_
Data Type: | num:lengthItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number Of Continents In Which Entity Operates + References No definition available. + Details
Name: | fi_NumberOfContinentsInWhichEntityOperates
Namespace Prefix: | fi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition The number of countries in which the entity operates as of balance sheet date. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8672-108599 + Details
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Namespace Prefix: | us-gaap_
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Period Type: | duration

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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
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=fi_TubularRunningServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |