Commitments and Contingencies (Narrative) (Details)	1 Months Ended	12 Months Ended
	Oct. 31, 2017 USD ($)	Dec. 31, 2018 USD ($) ship berth	Dec. 31, 2017 EUR (€) ship berth	Dec. 31, 2016 EUR (€) ship berth	Dec. 31, 2015 EUR (€) berth	Feb. 28, 2019 berth	Sep. 30, 2018 ship berth	Oct. 31, 2017 EUR (€)
Commitments and Contingencies
Percentage of long-term debt with fixed interest rate		59.10%	57.40%
Aggregate cost of ships expected to enter service | $		$ 11,400,000,000
Deposit for the purchase of ships expected to enter service | $		$ 651,700,000
Percentage of aggregate cost exposed to fluctuations in the euro exchange rate		53.50%	54.00%
Project edge class ship term loans | Project edge ship II
Commitments and Contingencies
Unsecured term loan, construction financing commitment per ship		$ 717,000,000		€ 627,100,000
Project edge class ship term loans | Project edge-class ship
Commitments and Contingencies
Bank financing commitment percentage				80.00%
Percentage of unsecured term loan guaranteed by an export credit agency				100.00%
Long term debt, stated interest rate (as a percent)				3.23%
Unsecured term loan, amortization period				12 years
Royal Caribbean International | Cruise ships on order | Quantum-class ship
Commitments and Contingencies
Number of ships under construction | ship		2
Royal Caribbean International | Cruise ships on order | Oasis-class ship
Commitments and Contingencies
Number of ships under construction | ship		1
Royal Caribbean International | Cruise ships on order | Icon-class ships
Commitments and Contingencies
Number of ships under construction | ship		2	2
Approximate berths		25,300
Royal Caribbean International | Cruise ships on order | Silversea Cruises
Commitments and Contingencies
Number of ships under construction | ship		3					2
Approximate berths		1,200					1,200
Celebrity Cruise Ships | Project edge-class ship
Commitments and Contingencies
Number of ships under construction | ship				2
Approximate berths				2,900
Celebrity Cruise Ships | Cruise ships on order | Two project edge class ships
Commitments and Contingencies
Number of ships under construction | ship		3
Approximate berths		9,400
Project Icon | Royal Caribbean International
Commitments and Contingencies
Approximate berths		5,650
Bank financing commitment percentage	80.00%							80.00%
Project Icon | Euler Hermes
Commitments and Contingencies
Percentage of unsecured term loan guaranteed by an export credit agency	95.00%
Third and Fourth Edge Class Ships and Fifth Oasis Class Ship
Commitments and Contingencies
Bank financing commitment percentage			80.00%
Percentage of unsecured term loan guaranteed by an export credit agency	100.00%		100.00%
Third Edge Class Ship | Celebrity Cruise Ships
Commitments and Contingencies
Approximate berths			3,200
Fifth Oasis Class Ship | Royal Caribbean International
Commitments and Contingencies
Approximate berths			5,500
Fourth and fifth Quantum-class ships
Commitments and Contingencies
Approximate berths					4,250
Fourth and fifth Quantum-class ships | Unsecured term loan maturing twelve years after ship delivery
Commitments and Contingencies
Long term debt, stated interest rate (as a percent)		3.45%
Fourth and fifth Quantum-class ships | Quantum of the Seas unsecured term loans
Commitments and Contingencies
Bank financing commitment percentage					80.00%
Fourth and fifth Quantum-class ships | LIBOR | Unsecured term loan maturing twelve years after ship delivery
Commitments and Contingencies
Margin on floating rate base (as a percent)		0.95%
Fourth and fifth Quantum-class ships | Euler Hermes | Quantum of the Seas unsecured term loans
Commitments and Contingencies
Percentage of unsecured term loan guaranteed by an export credit agency					95.00%
Quantum Class Fourth Ship | Unsecured term loan maturing twelve years after ship delivery
Commitments and Contingencies
Unsecured term loan, construction financing commitment per ship		$ 872,300,000			€ 762,900,000
Quantum Class Fifth Ship | Unsecured term loan maturing twelve years after ship delivery
Commitments and Contingencies
Unsecured term loan, construction financing commitment per ship		889,000,000			€ 777,500,000
Unsecured term loans | Unsecured term loan maturing twelve years after ship delivery
Commitments and Contingencies
Unsecured term loan, amortization period			12 years
Unsecured term loans | Project Icon | Unsecured term loan maturing twelve years after ship delivery
Commitments and Contingencies
Maximum borrowing capacity	$ 1,600,000,000.0							€ 1,400,000,000.0
Percentage of long-term debt with fixed interest rate	75.00%							75.00%
Unsecured term loan, amortization period	12 years
Unsecured term loans | First Project Icon Class Ship | Unsecured term loan maturing twelve years after ship delivery
Commitments and Contingencies
Long term debt, stated interest rate (as a percent)	3.56%							3.56%
Unsecured term loans | Second Project Icon Class Ship | Unsecured term loan maturing twelve years after ship delivery
Commitments and Contingencies
Long term debt, stated interest rate (as a percent)	3.76%							3.76%
Unsecured term loans | Third Edge Class Ship | Unsecured term loan maturing twelve years after ship delivery
Commitments and Contingencies
Maximum borrowing capacity | €			€ 684,200,000.0
Long term debt, stated interest rate (as a percent)			1.28%
Unsecured term loans | Fourth Edge Class Ship | Unsecured term loan maturing twelve years after ship delivery
Commitments and Contingencies
Maximum borrowing capacity		817,100,000.0	€ 714,600,000.0
Unsecured term loans | Fifth Oasis Class Ship | Unsecured term loan maturing twelve years after ship delivery
Commitments and Contingencies
Maximum borrowing capacity		$ 1,300,000,000.0	€ 1,100,000,000.0
Unsecured term loans | Fourth Edge and Fifth Oasis Class Ships | Unsecured term loan maturing twelve years after ship delivery
Commitments and Contingencies
Long term debt, stated interest rate (as a percent)			3.18%
Unsecured term loans | Minimum
Commitments and Contingencies
Long term debt, stated interest rate (as a percent)		2.53%
Unsecured term loans | Minimum | First Project Icon Class Ship | LIBOR | Unsecured term loan maturing twelve years after ship delivery
Commitments and Contingencies
Margin on floating rate base (as a percent)	1.10%
Unsecured term loans | Minimum | Second Project Icon Class Ship | LIBOR | Unsecured term loan maturing twelve years after ship delivery
Commitments and Contingencies
Margin on floating rate base (as a percent)	1.15%
Unsecured term loans | Maximum
Commitments and Contingencies
Long term debt, stated interest rate (as a percent)		5.41%
Unsecured term loans | Maximum | First Project Icon Class Ship | LIBOR | Unsecured term loan maturing twelve years after ship delivery
Commitments and Contingencies
Margin on floating rate base (as a percent)	1.15%
Unsecured term loans | Maximum | Second Project Icon Class Ship | LIBOR | Unsecured term loan maturing twelve years after ship delivery
Commitments and Contingencies
Margin on floating rate base (as a percent)	1.20%
Scenario, Forecast | Royal Caribbean International | Cruise ships on order | Oasis-class ship
Commitments and Contingencies
Approximate berths						5,700