Amount before tax of other than temporary impairment (OTTI) on investment in available-for-sale debt security, recognized in other comprehensive loss, attributable to parent entity.

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Name:	us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParentAvailableforsaleSecurities
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Balance Type:	debit
Period Type:	duration

SIGNIFICANT ACCOUNTING POLICIES - PROPERTY AND EQUIPMENT AND OTHER (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) item	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Impairment of Investment
Impairment charges related to investment in SSAT	$ 0.0	$ 0.0	$ 0.0
Capitalized Interest
Interest Costs Capitalized	$ 0.2	$ 7.4	$ 15.6
Dry-docking
Number of dry-docking inspections to be made within a specified period \| item	2
Dry-dock inspections interval, minimum	36 months
Minimum
Dry-docking
Period within which number of specified dry-docking inspections to be made	2 years
Maximum
Dry-docking
Period within which number of specified dry-docking inspections to be made	5 years