Revenue, Contract Assets and Liabilities and Other Contract Matters - Summary of Contract with Customer, Asset and Liability (Parenthetical) (Details) $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
|
Dec. 31, 2020
USD ($)
vessel
|
Dec. 31, 2019
USD ($)
vessel
|
Dec. 31, 2018
USD ($)
|
Mar. 31, 2018
vessel
|
|
| Revenue From Contract With Customer [Abstract] | ||||
| Number of multi-purpose service vessels | vessel | 2 | 2 | 2 | |
| Contract asset under dispute, noncurrent | $ 12.5 | $ 12.5 | ||
| Contract with customer, liability, revenue recognized | 18.2 | 14.3 | $ 5.1 | |
| Contract with customer, liability, accrued contract losses, current | $ 8.6 | $ 6.4 | ||
| X | ||||||||||
- Definition Construction in progress, number of multi-purpose service vessels. No definition available.
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| X | ||||||||||
- Definition Contract asset under dispute noncurrent. No definition available.
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| X | ||||||||||
- Definition Contract with customer liability accrued contract losses current. No definition available.
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| X | ||||||||||
- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- References No definition available.
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