Condensed Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash provided (required) by operating activities:
Net income	$ 261.7	$ 526.1
Adjustments to reconcile net income to cash provided (required) by operating activities:
Depreciation	276.8	209.9
Amortization	184.9	13.7
Employee benefit plan and stock-based compensation costs	30.5	15.9
Unrealized (gain) loss on derivative instruments and foreign exchange	(70.5)	18.2
Deferred income tax provision (benefit)	3.5	(79.3)
Impairments (Note 5)	9.0
Other	(15.4)	(32.4)
Changes in operating assets and liabilities, net of effects of acquisitions:
Trade receivables, net and costs in excess of billings	225.8	(727.8)
Inventories, net	198.0	68.4
Accounts payable, trade	150.2	131.2
Advance payments and billings in excess of costs	(1,195.3)	(72.5)
Income taxes payable (receivable), net	(88.1)	118.6
Other assets and liabilities, net	307.9	78.4
Cash provided by operating activities	279.0	268.4
Cash provided (required) by investing activities:
Capital expenditures	(170.4)	(107.6)
Cash acquired in merger of FMC Technologies, Inc. and Technip S.A. (Note 2)	1,479.2
Cash divested from deconsolidation		(89.8)
Proceeds from sale of assets	13.6	10.1
Other	12.0
Cash provided (required) by investing activities	1,334.4	(187.3)
Cash provided (required) by financing activities:
Net decrease in short-term debt	(28.4)	(4.5)
Net increase (decrease) in commercial paper	(363.0)
Proceeds from issuance of long-term debt	7.3	449.6
Repayments of long-term debt	(547.2)	(765.2)
Purchase of treasury stock	(1.3)	(151.3)
Dividends paid		(112.4)
Payments related to taxes withheld on stock-based compensation	(46.6)
Other	(76.9)	0.3
Cash required by financing activities	(1,056.1)	(583.5)
Effect of changes in foreign exchange rates on cash and cash equivalents	69.5	121.8
Increase (decrease) in cash and cash equivalents	626.8	(380.6)
Cash and cash equivalents, beginning of period	6,269.3	3,178.0
Cash and cash equivalents, end of period	$ 6,896.1	$ 2,797.4