Debt Instrument, Number of Tranches

No definition available.

Name:	fti_DebtInstrumentNumberOfTranches
Namespace Prefix:	fti_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

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+ Details

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

- Definition

Face (par) amount of debt instrument at time of issuance.

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+ Details

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

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

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

- Definition

The historical cost of the asset(s) sold in connection with the sale of the property to another party and the lease of the property back to the seller.

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+ Details

Name:	us-gaap_SaleLeasebackTransactionHistoricalCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_SaleLeasebackTransactionDescriptionAxis=fti_SaleLeasebackTransactionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_UnsecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=fti_Notesdue20223.40Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Balance Type:
Period Type:

- Details

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Period Type:

Debt - 2012 Issuances (Details) £ in Millions, $ in Millions	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Jan. 31, 2019 USD ($)	Dec. 31, 2017	Dec. 31, 2016 EUR (€)	Dec. 31, 2016 GBP (£)	Oct. 31, 2013 EUR (€) tranche	Jun. 30, 2012 EUR (€) tranche
Line of Credit Facility [Line Items]
Debt instrument, face amount \| €					€ 450,000,000
Interest rate, stated percentage		3.45%			0.875%	0.875%
Sale Leaseback Transaction
Line of Credit Facility [Line Items]
Sale leaseback transaction, historical cost \| $			$ 116.8
Long-term debt, gross \| $			$ 96.2
Unsecured debt
Line of Credit Facility [Line Items]
Debt instrument, face amount \| €							€ 355,000,000	€ 325,000,000
Number of tranches \| tranche							3	3
Unsecured debt \| 3.40% 2012 Private placement notes due 2022
Line of Credit Facility [Line Items]
Debt instrument, face amount \| €								€ 150,000,000
Interest rate, stated percentage	3.40%	3.40%						3.40%
Long-term debt, gross \| $	$ 169.9	$ 184.0
Unsecured debt \| 4.00% 2012 Private placement notes due 2027
Line of Credit Facility [Line Items]
Debt instrument, face amount \| €								€ 75,000,000
Interest rate, stated percentage	4.00%	4.00%						4.00%
Long-term debt, gross \| $	$ 84.9	$ 92.0
Unsecured debt \| 4.00% 2012 Private placement notes due 2032
Line of Credit Facility [Line Items]
Debt instrument, face amount \| €								€ 100,000,000
Interest rate, stated percentage	4.00%	4.00%						4.00%
Long-term debt, gross \| $	$ 113.3	$ 122.7
Term loan
Line of Credit Facility [Line Items]
Debt instrument, face amount \| £						£ 160.0
Interest rate, stated percentage				2.813%