Leases - Narrative (Details) - USD ($)	3 Months Ended				9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2016
Lessee, Lease, Description [Line Items]
Right-of-use assets, impairment		$ 13,300,000	$ 45,900,000
Variable lease cost	$ 0			$ 17,300,000	$ 25,600,000	$ 73,100,000
Pullmantur Holdings
Lessee, Lease, Description [Line Items]
Percentage of subsidiary which has been sold							51.00%
Port of Miami Terminal
Lessee, Lease, Description [Line Items]
Cash collateral	$ 181,100,000				$ 181,100,000
Minimum | Real Estate
Lessee, Lease, Description [Line Items]
Renewal term	1 year				1 year
Minimum | Berthing Agreement
Lessee, Lease, Description [Line Items]
Renewal term	1 year				1 year
Maximum | Real Estate
Lessee, Lease, Description [Line Items]
Renewal term	10 years				10 years
Maximum | Berthing Agreement
Lessee, Lease, Description [Line Items]
Renewal term	20 years				20 years