Revenues - Disaggregation of Revenue (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Total revenues		$ 2,806,631	$ 2,337,605	$ 5,246,398	$ 4,365,361
Cruise Itinerary
Disaggregation of Revenue [Line Items]
Total revenues		2,690,762	2,246,395	5,032,382	4,203,819
Cruise Itinerary | North America
Disaggregation of Revenue [Line Items]
Total revenues	[1]	1,571,769	1,264,167	3,252,827	2,611,427
Cruise Itinerary | Asia Pacific
Disaggregation of Revenue [Line Items]
Total revenues	[2]	327,777	283,198	817,852	816,177
Cruise Itinerary | Europe
Disaggregation of Revenue [Line Items]
Total revenues	[3]	594,712	597,399	602,694	597,399
Cruise Itinerary | Other regions
Disaggregation of Revenue [Line Items]
Total revenues	[4]	196,504	101,631	359,009	178,816
Other Revenues
Disaggregation of Revenue [Line Items]
Total revenues	[5]	$ 115,869	$ 91,210	$ 214,016	$ 161,542
Passenger Ticket | Other regions
Disaggregation of Revenue [Line Items]
Percentage of revenues by country	[6]	24.00%	27.00%	34.00%	40.00%
Passenger Ticket | United States
Disaggregation of Revenue [Line Items]
Percentage of revenues by country		67.00%	63.00%	66.00%	60.00%
Passenger Ticket | United Kingdom
Disaggregation of Revenue [Line Items]
Percentage of revenues by country		9.00%	10.00%

[1] Includes the United States, Canada, Mexico and the Caribbean.

[2] Includes Southeast Asia (e.g., Singapore, Thailand and the Philippines), East Asia (e.g., China and Japan), South Asia (e.g., India and Pakistan) and Oceania (e.g., Australia and Fiji Islands) regions.

[3] Includes European countries (e.g., Nordics, Germany, France, Italy, Spain and the United Kingdom).

[4] Includes seasonality impacted itineraries primarily in South and Latin American countries.

[5] Includes revenues primarily related to cancellation fees, vacation protection insurance, pre- and post-cruise tours and fees for operating certain port facilities. Amounts also include revenues related to our bareboat charter, procurement and management related services we perform on behalf of our unconsolidated affiliates. Refer to Note 7. Other Assets for more information on our unconsolidated affiliates.

[6] No other individual country's revenue exceeded 10% for the quarters and six months ended June 30, 2019 and 2018.