Leases Statement $ in Millions	12 Months Ended
Dec. 31, 2021 USD ($)
Property, Plant and Equipment [Line Items]
Right-of-use asset impairment	$ 17.0
Operating Leases, Operating Lease Term	15 years

The aggregate amount of write-downs for impairments recognized during the period for right-of-use operating lease assets in long lived assets held for use (including those held for disposal by means other than sale).

No definition available.

Name:	oii_Rightofuseassetimpairment
Namespace Prefix:	oii_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration