Debt (2023 Debt Financing Transactions) (Details) - USD ($)			1 Months Ended			12 Months Ended
		Feb. 28, 2023	Nov. 30, 2023	Oct. 31, 2023	Jun. 30, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Oct. 31, 2022
Long-Term Debt
Loss on extinguishment of debt						$ 121,000,000	$ 94,000,000	$ 139,000,000
Weighted average interest rate						6.06%	6.23%
Unsecured senior notes | Minimum
Long-Term Debt
Interest rate	[1]					3.70%
Unsecured senior notes | Maximum
Long-Term Debt
Interest rate	[1]					11.63%
Unsecured senior notes | Senior Guaranteed Notes Due January 2030
Long-Term Debt
Principal		$ 700,000,000
Interest rate		7.25%
Unsecured term loans | Minimum
Long-Term Debt
Interest rate	[1]					1.28%
Unsecured term loans | Maximum
Long-Term Debt
Interest rate	[1]					5.89%
Unsecured term loans | Novation Agreement
Long-Term Debt
Interest rate					4.21%
Debt instrument, term (in years)					12 years
Proceeds from unsecured debt					$ 503,000,000
Unsecured term loans | Novation Agreement | Euler Hermes
Long-Term Debt
Percentage of unsecured term loan guaranteed by an export credit agency					95.00%
Unsecured term loans | Celebrity Ascent Unsecured Term Loan
Long-Term Debt
Interest rate			3.18%
Debt instrument, term (in years)			12 years
Proceeds from unsecured debt			$ 844,000,000
Unsecured term loans | Celebrity Ascent Unsecured Term Loan | Term SOFR
Long-Term Debt
Margin on floating rate base (as a percent)			1.45%
Weighted average interest rate			3.33%
Unsecured term loans | Celebrity Ascent Unsecured Term Loan | BpiFAE
Long-Term Debt
Percentage of unsecured term loan guaranteed by an export credit agency			100.00%
Unsecured term loans | Icon Of The Seas Unsecured Term Loan
Long-Term Debt
Interest rate			3.56%
Debt instrument, term (in years)			12 years
Proceeds from unsecured debt			$ 1,800,000,000
Unsecured term loans | Icon Of The Seas Unsecured Term Loan | Term SOFR
Long-Term Debt
Weighted average interest rate			4.76%
Unsecured term loans | Icon Of The Seas Unsecured Term Loan | Term SOFR | Minimum
Long-Term Debt
Margin on floating rate base (as a percent)			1.53%
Unsecured term loans | Icon Of The Seas Unsecured Term Loan | Term SOFR | Maximum
Long-Term Debt
Margin on floating rate base (as a percent)			1.58%
Unsecured term loans | Icon Of The Seas Unsecured Term Loan | Euler Hermes
Long-Term Debt
Percentage of unsecured term loan guaranteed by an export credit agency			95.00%
Unsecured term loans | Icon Of The Seas Unsecured Term Loan | Finnvera
Long-Term Debt
Percentage of unsecured term loan guaranteed by an export credit agency			100.00%
Secured senior notes | Minimum
Long-Term Debt
Interest rate	[1]					8.25%
Secured senior notes | Senior Secured Notes Due 2025
Long-Term Debt
Interest rate						11.50%			11.50%
Repayment of debt						$ 1,400,000,000
Loss on extinguishment of debt						105,000,000
Credit agreement | Term Loan Facility, $700 Million
Long-Term Debt
Debt terminated		$ 700,000,000
Debt instrument, term (in years)		364 days
Credit agreement | Senior Unsecured Note, Backstop Committed Financing
Long-Term Debt
Debt terminated		$ 350,000,000
Revolving Credit Facility | Credit agreement
Long-Term Debt
Remaining borrowing capacity						$ 2,600,000,000
Revolving Credit Facility | Credit agreement | Unsecured Term Loan Due October 2023
Long-Term Debt
Repayment of debt				$ 502,000,000
Remaining borrowing capacity				$ 600,000,000

[1] Interest rates based on outstanding loan balance as of December 31, 2023, and for variable rate debt, includes either EURIBOR or Term SOFR plus the applicable margin.