Intangible Assets, Goodwill and Other (Details)	3 Months Ended			9 Months Ended
	Sep. 30, 2020 USD ($)	Mar. 31, 2020 USD ($) units	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)
Finite-Lived Intangible Assets [Line Items]
Impairment property plant equipment		$ 68,763,000
Impairment of Long-Lived Assets Held-for-use	$ 0	68,763,000		$ 68,763,000	$ 0
Goodwill [Line Items]
Goodwill, Impairment Loss	40,875,000	303,005,000	$ 0	343,880,000	$ 0
SDS Rosyth [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment of Long-Lived Assets Held-for-use		6,543,000
SDS Brazil [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment property plant equipment		9,834,000
Subsea Products Angola [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment property plant equipment		38,482,000
Shallow Water [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment property plant equipment		3,894,000
Ecosse [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment property plant equipment		3,628,000
Global Data Solution [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment property plant equipment		167,000
Oceaneering Entertainment System [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment property plant equipment		5,065,000
Oceaneering AGV System [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment property plant equipment		1,150,000
Manufactured Products Member
Finite-Lived Intangible Assets [Line Items]
Impairment of Long-Lived Assets Held-for-use		61,074,000
Offshore Projects Group
Finite-Lived Intangible Assets [Line Items]
Impairment of Long-Lived Assets Held-for-use		7,522,000
Integrity Managements & Digital Solutions Member
Finite-Lived Intangible Assets [Line Items]
Impairment of Long-Lived Assets Held-for-use		$ 167,000
Weighted Average [Member]
Finite-Lived Intangible Assets [Line Items]
Alternative Investment, Measurement Input | units		0.12
Goodwill [Line Items]
Alternative Investment, Measurement Input | units		0.12
Measurement Input, Long-term Revenue Growth Rate [Member]
Finite-Lived Intangible Assets [Line Items]
Alternative Investment, Measurement Input | units		0.02
Goodwill [Line Items]
Alternative Investment, Measurement Input | units		0.02
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Alternative Investment, Measurement Input | units		0.11
Goodwill [Line Items]
Alternative Investment, Measurement Input | units		0.11
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Alternative Investment, Measurement Input | units		0.15
Goodwill [Line Items]
Alternative Investment, Measurement Input | units		0.15
Manufactured Products Member
Finite-Lived Intangible Assets [Line Items]
Impairment of Long-Lived Assets Held-for-use				61,074,000
Goodwill [Line Items]
Goodwill, Impairment Loss	$ 40,875,000	$ 11,388,000		52,263,000
Offshore Projects Group
Finite-Lived Intangible Assets [Line Items]
Impairment of Long-Lived Assets Held-for-use				7,522,000
Goodwill [Line Items]
Goodwill, Impairment Loss		66,285,000		66,285,000
Integrity Managements & Digital Solutions Member
Finite-Lived Intangible Assets [Line Items]
Impairment of Long-Lived Assets Held-for-use				167,000
Goodwill [Line Items]
Goodwill, Impairment Loss		123,214,000		123,214,000
Subsea Products [Member]
Goodwill [Line Items]
Goodwill, Impairment Loss		51,302,000
Subsea Projects [Member]
Goodwill [Line Items]
Goodwill, Impairment Loss		129,562,000
Asset Integrity [Member]
Goodwill [Line Items]
Goodwill, Impairment Loss		110,753,000
Subsea Robotics Member
Goodwill [Line Items]
Goodwill, Impairment Loss		102,118,000		$ 102,118,000
Advanced Technologies [Member]
Goodwill [Line Items]
Goodwill, Impairment Loss		$ 11,388,000