Condensed Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash provided (required) by operating activities
Net income (loss)	$ 91.4	$ (15.2)
Adjustments to reconcile net income (loss) to cash provided (required) by operating activities
Depreciation	86.4	83.2
Amortization	45.4	68.0
Employee benefit plan and share-based compensation costs	7.4	8.1
Deferred income tax provision (benefit), net	(59.9)	4.0
Unrealized loss (gain) on derivative instruments and foreign exchange	7.3	(10.7)
Impairments	0.4	0.4
Income from equity affiliates, net of dividends received	(13.2)	(8.9)
Other	136.0	62.9
Changes in operating assets and liabilities, net of effects of acquisitions
Trade receivables, net and contract assets	(522.7)	267.7
Inventories, net	(59.7)	126.6
Accounts payable, trade	(332.2)	(168.8)
Contract liabilities	462.0	43.3
Income taxes payable (receivable), net	15.9	(88.1)
Other assets and liabilities, net	(66.1)	(221.5)
Cash provided (required) by operating activities	(201.6)	151.0
Cash provided (required) by investing activities
Capital expenditures	(53.2)	(51.2)
Cash acquired in merger of FMC Technologies, Inc. and Technip S.A. (Note 2)	0.0	1,479.2
Acquisitions, net of cash acquired	(62.0)	0.0
Proceeds from sale of assets	1.8	4.4
Other	(0.2)	10.5
Cash provided (required) by investing activities	(113.6)	1,442.9
Cash required by financing activities
Net increase (decrease) in short-term debt	2.4	4.2
Net increase (decrease) in commercial paper	(117.6)	(290.2)
Proceeds from issuance of long-term debt	0.5
Repayments of long-term debt	(5.3)	(534.1)
Payments related to taxes withheld on share-based compensation	0.0	(46.6)
Purchase of treasury stock	(92.6)	0.0
Other	1.4	1.2
Cash provided (required) by financing activities	(211.2)	(865.5)
Effect of changes in foreign exchange rates on cash and cash equivalents	9.6	44.0
Increase (decrease) in cash and cash equivalents	(516.8)	772.4
Cash and cash equivalents, beginning of period	6,737.4	6,269.3
Cash and cash equivalents, end of period	$ 6,220.6	$ 7,041.7