Distributable Reserves

No definition available.

Name:	fti_DistributableReserves
Namespace Prefix:	fti_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Treasury Stock Value, Acquired, Constructive Retirement Method

+ References

No definition available.

+ Details

Name:	fti_TreasuryStockValueAcquiredConstructiveRetirementMethod
Namespace Prefix:	fti_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

+ Details

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of paid and unpaid cash, stock, and paid-in-kind (PIK) dividends declared, for example, but not limited to, common and preferred stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 405
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817

+ Details

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

- Definition

Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

+ References

+ Details

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

- Definition

Amount of paid and unpaid common stock dividends declared with the form of settlement in stock.

+ References

+ Details

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

- Definition

Amount of stock repurchase plan authorized.

+ References

No definition available.

+ Details

Name:	us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

+ References

No definition available.

+ Details

Name:	us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- References

No definition available.

+ Details

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

Stockholders' Equity (Narrative) (Details) $ / shares in Units, € in Millions, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($) $ / shares shares	Sep. 30, 2016 $ / shares	Sep. 30, 2017 USD ($) $ / shares shares	Sep. 30, 2016 $ / shares	Sep. 30, 2016 EUR (€)
Stockholders' Equity Note [Abstract]
Cash dividends declared \| $ / shares	$ 0	$ 0	$ 0	$ 0
Dividends \| €					€ 236.6
Dividends, Common Stock, Cash \| €					100.8
Dividends, Common Stock, Stock \| €					€ 135.8
Distributable Reserves \| $	$ 10,100.0		$ 10,100.0
Stock Repurchase Program, Authorized Amount \| $	$ 500.0		500.0
Treasury Stock, Value, Acquired, Constructive Retirement Method \| $			$ 3.6
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased \| shares	18.4		18.4