Condensed Consolidated Statements Of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue:
Lease and other revenue	$ 60.7	$ 55.1	$ 163.4	$ 144.7
Total revenue	3,143.8	4,140.9	9,229.9	11,373.9
Costs and expenses
Cost of lease and other revenue	30.9	37.5	99.4	100.2
Selling, general and administrative expense	250.6	284.4	835.1	806.5
Research and development expense	38.6	51.1	133.3	143.6
Impairment, restructuring and other expenses (Note 14)	9.7	59.4	32.6	56.8
Merger transaction and integration costs (Note 2)	6.3	9.2	20.9	87.2
Total costs and expenses	2,863.7	3,872.3	8,527.2	10,704.6
Other income (expense), net	10.4	30.0	(12.6)	43.2
Income from equity affiliates (Note 9)	16.4	17.3	70.6	39.4
Income before net interest expense and income taxes	306.9	315.9	760.7	751.9
Net interest expense	(106.0)	(86.3)	(244.3)	(240.5)
Income before income taxes	200.9	229.6	516.4	511.4
Provision for income taxes (Note 16)	66.7	111.7	180.7	249.7
Net income	134.2	117.9	335.7	261.7
Net loss attributable to noncontrolling interests	2.7	3.1	2.0	5.5
Net income attributable to TechnipFMC plc	$ 136.9	$ 121.0	$ 337.7	$ 267.2
Earnings per share attributable to TechnipFMC plc
Basic (usd per share)	$ 0.30	$ 0.26	$ 0.73	$ 0.57
Diluted (usd per share)	$ 0.30	$ 0.26	$ 0.73	$ 0.57
Weighted average shares outstanding (Note 6)
Basic (in shares)	454.5	467.2	460.0	466.8
Diluted (in shares)	459.0	469.7	464.0	468.3
Services
Revenue:
Revenue	$ 2,487.9	$ 3,374.9	$ 7,159.2	$ 9,301.0
Costs and expenses
Cost of goods and services sold	2,046.6	2,841.3	5,846.0	7,728.4
Products
Revenue:
Revenue	595.2	710.9	1,907.3	1,928.2
Costs and expenses
Cost of goods and services sold	$ 481.0	$ 589.4	$ 1,559.9	$ 1,781.9