Summary Of Major Accounting Policies - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Jan. 01, 2020	Jan. 01, 2019
Property, Plant and Equipment [Line Items]
Right-of-use asset impairment	$ 16,708,000
Impairment property plant equipment	51,578,000	$ 143,000,000
Intangible Assets Impairments	477,000
Impairment of Long-Lived Assets Held-for-use	68,763,000	17,000,000
Present Value of Lease Liabilities					$ 191,000,000
Right-of-use operating lease assets	135,113,000	163,238,000			185,000,000
Goodwill, Impairment Loss	$ 303,005,000	$ 15,000,000	$ 0
Cumulative effect of new accounting principle in period of adoption				$ (2,273,000)	(5,860,000)
Interest costs capitalized			$ 2,000,000.0
Maximum [Member]
Property, Plant and Equipment [Line Items]
Equity Method Investment, Ownership Percentage	50.00%
Minimum [Member]
Property, Plant and Equipment [Line Items]
Threshold for consolidation, percentage	50.00%
Equity Method Investment, Ownership Percentage	20.00%
Retained Earnings [Member]
Property, Plant and Equipment [Line Items]
Cumulative effect of new accounting principle in period of adoption					(5,860,000)
Accounting Standards Update 2016-02 [Member] | Retained Earnings [Member]
Property, Plant and Equipment [Line Items]
Cumulative effect of new accounting principle in period of adoption					$ 5,900,000
Shallow Water [Member]
Property, Plant and Equipment [Line Items]
Right-of-use asset impairment	$ 0
Impairment property plant equipment	3,894,000
Intangible Assets Impairments	0
Impairment of Long-Lived Assets Held-for-use	3,894,000
Oceaneering Entertainment System [Member]
Property, Plant and Equipment [Line Items]
Right-of-use asset impairment	3,472,000
Impairment property plant equipment	1,593,000
Impairment of Long-Lived Assets Held-for-use	5,065,000
Ecosse [Member]
Property, Plant and Equipment [Line Items]
Right-of-use asset impairment	0
Impairment property plant equipment	3,628,000
Intangible Assets Impairments	0
Impairment of Long-Lived Assets Held-for-use	3,628,000
Oceaneering AGV System [Member]
Property, Plant and Equipment [Line Items]
Right-of-use asset impairment	695,000
Impairment property plant equipment	145,000
Intangible Assets Impairments	310,000
Impairment of Long-Lived Assets Held-for-use	1,150,000
SDS Rosyth [Member]
Property, Plant and Equipment [Line Items]
Impairment property plant equipment	6,543,000
Impairment of Long-Lived Assets Held-for-use	6,543,000
Global Data Solution [Member]
Property, Plant and Equipment [Line Items]
Intangible Assets Impairments	167,000
Impairment of Long-Lived Assets Held-for-use	167,000
SDS Brazil [Member]
Property, Plant and Equipment [Line Items]
Impairment property plant equipment	9,834,000
Impairment of Long-Lived Assets Held-for-use	9,834,000
Subsea Products Angola [Member]
Property, Plant and Equipment [Line Items]
Right-of-use asset impairment	12,541,000
Impairment property plant equipment	25,941,000
Impairment of Long-Lived Assets Held-for-use	$ 38,482,000
Property Subject to Operating Lease [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Operating Leases, Operating Lease Term	15 years