Debt (Revolving Credit Facility) (Details) $ in Millions	Jan. 17, 2017 USD ($)
Revolving Credit Facility \| Federal Funds Rate and Overnight Bank Funding Rate spread
Line of Credit Facility
Basis spread on variable rate	0.50%
Revolving Credit Facility \| London Interbank Offered Rate (LIBOR)
Line of Credit Facility
Basis spread on variable rate	1.00%
Revolving Credit Facility \| Minimum \| LIBOR and EURIBOR Loans
Line of Credit Facility
Basis spread on variable rate	0.82%
Revolving Credit Facility \| Minimum \| Base Rate
Line of Credit Facility
Basis spread on variable rate	0.00%
Revolving Credit Facility \| Maximum \| LIBOR and EURIBOR Loans
Line of Credit Facility
Basis spread on variable rate	1.30%
Revolving Credit Facility \| Maximum \| Base Rate
Line of Credit Facility
Basis spread on variable rate	0.30%
Line of Credit \| Revolving Credit Facility
Line of Credit Facility
Initiation date	Jan. 17, 2017
Maximum borrowing capacity	$ 2,500.0
Conditional increase in borrowing capacity	500.0
Line of Credit \| Letter of Credit \| JPMorgan Chase Bank
Line of Credit Facility
Maximum borrowing capacity	$ 1,500.0

Conditional Increase In Maximum Borrowing Capacity Under Line Of Credit Facility

No definition available.

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Namespace Prefix:	fti_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the credit facility first became available, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration

- 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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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Period Type:	instant

- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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