Pension And Other Post-retirement Benefits (Components Of Net Periodic Benefit Cost) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Defined Benefit Plan Disclosure
U.S. Defined Benefit Plan, Description of Plan Amendment			In October 2009, the Board of Directors amended the U.S. Qualified and Non-Qualified Defined Benefit Pension Plans (“U.S. Pension Plans”) to freeze participation in the U.S. Pension Plans for all new nonunion employees hired on or after January 1, 2010, and current nonunion employees with less than five years of vesting service as of December 31, 2009 (“frozen participants”). The Company amended the U.S. Qualified Pension Plan, and effective June 1, 2014, the assets and liabilities attributable to participants who are (i) either frozen participants or participants that had terminated service and subsequently became re-employed on or after January 1, 2010, and (ii) active employees of FMC Technologies as of June 1, 2014 were transferred from the U.S. Qualified Pension Plan to the FMC Technologies, Inc. Frozen Retirement Plan (“Frozen Plan”). As of June 1, 2014, the benefits under the Frozen Plan were actuarially equivalent to the benefits each participant would have received under the U.S. Qualified Pension Plan. Under the Frozen Plan, participants have the option to accept cash or an annuity upon the Frozen Plan’s termination.
United States Pension Plans of US Entity, Defined Benefit
Defined Benefit Plan Disclosure
Service cost	$ 3.4	$ 4.1	$ 10.3	$ 12.4
Interest cost	7.2	6.4	21.8	19.3
Expected return on plan assets	(11.5)	(10.4)	(34.7)	(31.2)
Amortization of prior service cost (credit)
Amortization of transition asset
Amortization of actuarial loss (gain), net	3.1	6.7	9.2	20.1
Net periodic benefit cost	2.2	6.8	6.6	20.6
Pension contributions			8.4
Foreign Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure
Service cost	4.2	3.6	12.8	11.0
Interest cost	4.6	3.9	14.0	12.0
Expected return on plan assets	(7.5)	(5.8)	(22.8)	(17.6)
Amortization of prior service cost (credit)			0.1
Amortization of transition asset	(0.1)	(0.1)	(0.1)	(0.1)
Amortization of actuarial loss (gain), net	1.8	1.4	5.2	4.0
Net periodic benefit cost	3.0	3.0	9.2	9.3
Pension contributions			18.5
Other Post-retirement Benefit Plans, Defined Benefit
Defined Benefit Plan Disclosure
Service cost		0.1		0.1
Interest cost	0.1	0.1	0.3	0.2
Amortization of prior service cost (credit)		(0.2)		(0.4)
Amortization of actuarial loss (gain), net	(0.1)	(0.1)	(0.2)	(0.2)
Net periodic benefit cost		$ (0.1)	$ 0.1	$ (0.3)