Goodwill and Intangible Assets Goodwill and Intangibles (Carrying Amount of Goodwill) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2020 USD ($)
Goodwill [Rollforward]
Beginning Balance	$ 5,598.3
Impairments	3,083.4
Translation	(26.2)
Ending Balance	2,488.7
Subsea
Goodwill [Rollforward]
Beginning Balance	2,814.1
Transfers	(21.2)	[1]
Impairments	2,747.5
Translation	(45.4)
Technip Energies
Goodwill [Rollforward]
Beginning Balance	2,423.6
Transfers	46.1	[1]
Translation	19.0
Ending Balance	2,488.7
Surface Technologies
Goodwill [Rollforward]
Beginning Balance	360.6
Transfers	(24.9)	[1]
Impairments	335.9
Translation	$ 0.2

[1] Beginning in the first quarter of 2020, Technip Energies includes our Loading Systems business that was previously reported in the Surface Technologies segment and our process automation business, Cybernetix, that was previously reported in the Subsea segment. See Note 6 for further details.