Litigation Settlement, Deferred Prosecution Agreement Term

No definition available.

Name:	fti_LitigationSettlementDeferredProsecutionAgreementTerm
Namespace Prefix:	fti_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Litigation Settlement, Leniency Agreement Self Reporting Period

+ References

No definition available.

+ Details

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Namespace Prefix:	fti_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Litigation Settlement, Period For Providing Reports

+ References

No definition available.

+ Details

Name:	fti_LitigationSettlementPeriodForProvidingReports
Namespace Prefix:	fti_
Data Type:	xbrli:durationItemType
Balance Type:	na
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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_GuaranteeObligationsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Describe the approximate term of the guarantee or each group of similar guarantees.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=124440162&loc=d3e12069-110248

+ Details

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

- Definition

Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.25)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_LitigationReserve
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount awarded to other party in judgment or settlement of litigation.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees.

+ References

No definition available.

+ Details

Name:	us-gaap_LitigationSettlementExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

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Namespace Prefix:
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Balance Type:
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- Details

Name:	srt_CounterpartyNameAxis=fti_UnitedStatesAuthoritiesMember
Namespace Prefix:
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Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=fti_UnitedStatesDepartmentOfJusticeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_GuaranteeObligationsByNatureAxis=us-gaap_IndirectGuaranteeOfIndebtednessMember
Namespace Prefix:
Data Type:	na
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COMMITMENTS AND CONTINGENT LIABILITIES - Narrative (Details) - USD ($) $ in Millions		1 Months Ended	9 Months Ended
	Jun. 25, 2019	Sep. 30, 2019	Sep. 30, 2021
Guarantor Obligations
Litigation settlement, amount awarded to other party	$ 301.3
Litigation settlement, expense		$ 5.1
Estimated litigation liability			$ 70.0
Brazilian Authorities
Guarantor Obligations
Period anti-corruption program reports will be provided	2 years
Self reporting period under leniency agreement	2 years
U.S. Authorities
Guarantor Obligations
Period anti-corruption program reports will be provided	3 years
DOJ
Guarantor Obligations
Deferred Prosecution Agreement term	3 years
Indirect guarantee of indebtedness
Guarantor Obligations
Guarantor obligations, term of obligation (in years)			five years