Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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Name:	us-gaap_RestructuringCharges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Restructuring Charge (Details) - USD ($) $ in Millions	12 Months Ended
Restructuring Charge (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Contract termination
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred to date	$ 2.7		$ 1.5
Restructuring charges	$ 2.7
FPSO Segment
Restructuring Cost and Reserve [Line Items]
Restructuring liabilities accrued		$ 0.0	$ 1.5