Equity Method Investments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Schedule of Equity Method Investments
Income from equity affiliates	$ 11.1	$ 25.9	$ 52.9	$ 54.0
Subsea
Schedule of Equity Method Investments
Income from equity affiliates	12.9	23.3	49.7	49.5
Technip Energies
Schedule of Equity Method Investments
Income from equity affiliates	$ (1.8)	$ 2.6	$ 3.2	$ 4.5