Condensed Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash provided (required) by operating activities:
Net income (loss)	$ (15.2)	$ 120.6
Adjustments to reconcile net income to cash provided (required) by operating activities:
Depreciation	83.2	69.4
Amortization	68.0	5.2
Employee benefit plan and stock-based compensation costs	8.1	6.0
Unrealized (gain) loss on derivative instruments and foreign exchange	(10.7)	27.6
Deferred income tax provision (benefit)	4.0	(19.8)
Impairments (Note 6)	0.4
Other	54.0	(2.1)
Changes in operating assets and liabilities, net of effects of acquisitions:
Trade receivables, net and costs in excess of billings	267.7	8.8
Inventories, net	126.6	42.0
Accounts payable, trade	(168.8)	(84.0)
Advance payments and billings in excess of costs	43.3	(83.4)
Income taxes payable (receivable), net	(88.1)	7.2
Other assets and liabilities, net	(221.5)	62.9
Cash provided by operating activities	151.0	160.4
Cash provided (required) by investing activities:
Capital expenditures	(51.2)	(25.5)
Cash acquired in merger of FMC Technologies, Inc. and Technip S.A. (Note 3)	1,479.2
Proceeds from sale of assets	4.4	0.5
Other	10.5
Cash provided (required) by investing activities	1,442.9	(25.0)
Cash provided (required) by financing activities:
Net increase (decrease) in short-term debt	4.2	(694.4)
Net increase (decrease) in commercial paper	(290.2)	11.0
Proceeds from issuance of long-term debt		438.4
Repayments of long-term debt	(534.1)	(4.8)
Payments related to taxes withheld on stock-based compensation	(46.6)
Other	1.2	(19.4)
Cash required by financing activities	(865.5)	(269.2)
Effect of changes in foreign exchange rates on cash and cash equivalents	44.0	(97.7)
Increase (decrease) in cash and cash equivalents	772.4	(231.5)
Cash and cash equivalents, beginning of period	6,269.3	3,178.0
Cash and cash equivalents, end of period	$ 7,041.7	$ 2,946.5