Earnings Per Share (Reconciliation Of Number Of Shares Used For Basic And Diluted Earnings Per Share ("EPS") Calculation ) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share [Abstract]
Net income attributable to FMC Technologies, Inc.	$ 147.6us-gaap_NetIncomeLoss	$ 135.2us-gaap_NetIncomeLoss
Weighted average number of shares outstanding	233.0	237.4
Dilutive effect of restricted stock units and stock options	0.9	0.4
Total shares and dilutive securities	233.9	237.8
Basic earnings per share attributable to FMC Technologies, Inc.	$ 0.63us-gaap_EarningsPerShareBasic	$ 0.57us-gaap_EarningsPerShareBasic
Diluted earnings per share attributable to FMC Technologies, Inc.	$ 0.63us-gaap_EarningsPerShareDiluted	$ 0.57us-gaap_EarningsPerShareDiluted

Earnings Per Share (Reconciliation Of Number Of Shares Used For Basic And Diluted Earnings Per Share ("EPS") Calculation ) (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified

3 Months Ended

Mar. 31, 2015

Mar. 31, 2014

Earnings Per Share [Abstract]

Net income attributable to FMC Technologies, Inc.

$ 147.6us-gaap_NetIncomeLoss

$ 135.2us-gaap_NetIncomeLoss

Weighted average number of shares outstanding

233.0us-gaap_WeightedAverageNumberOfSharesOutstandingBasic

237.4us-gaap_WeightedAverageNumberOfSharesOutstandingBasic

Dilutive effect of restricted stock units and stock options

0.9us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

0.4us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

Total shares and dilutive securities

233.9us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding

237.8us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding

Basic earnings per share attributable to FMC Technologies, Inc.

$ 0.63us-gaap_EarningsPerShareBasic

$ 0.57us-gaap_EarningsPerShareBasic

Diluted earnings per share attributable to FMC Technologies, Inc.

$ 0.63us-gaap_EarningsPerShareDiluted

$ 0.57us-gaap_EarningsPerShareDiluted

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