Equity Method Investments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Schedule of Equity Method Investments
Income from equity affiliates	$ 13.0	$ 14.2	$ 41.8	$ 28.1
Subsea
Schedule of Equity Method Investments
Income from equity affiliates	15.7	11.3	36.8	26.2
Technip Energies
Schedule of Equity Method Investments
Income from equity affiliates	$ (2.7)	$ 2.9	$ 5.0	$ 1.9