Debt (2021 Debt Financing Transactions) (Details) - USD ($)		1 Months Ended						3 Months Ended	12 Months Ended
		Jul. 31, 2022	Apr. 30, 2022	Aug. 31, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2019	Jun. 30, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2017	Oct. 31, 2022
Long-Term Debt
Deferred principal payments, repayment period			5 years
Principal				$ 1,000,000,000
Loss on extinguishment of debt									$ 93,810,000	$ 138,759,000	$ 41,109,000
Up-front payment arrangement | Minimum
Long-Term Debt
Credit agency fees, percentage of loan amount payable									2.35%
Up-front payment arrangement | Maximum
Long-Term Debt
Credit agency fees, percentage of loan amount payable									5.48%
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 | Euler Hermes
Long-Term Debt
Percentage of unsecured term loan guaranteed by an export credit agency							95.00%					95.00%
Unsecured senior notes | Minimum
Long-Term Debt
Interest rate	[1]								3.70%
Unsecured senior notes | Maximum
Long-Term Debt
Interest rate	[1]								11.63%
Secured senior notes | Minimum
Long-Term Debt
Interest rate	[1]								8.25%
Secured senior notes | Maximum
Long-Term Debt
Interest rate	[1]								11.50%
Novation Agreement | Unsecured term loans
Long-Term Debt
Proceeds from unsecured debt						$ 994,100,000
Debt instrument, term						12 years
Bank financing commitment percentage									80.00%
Percentage of premium payable									100.00%
Novation Agreement | Unsecured term loans | LIBOR
Long-Term Debt
Margin on floating rate base (as a percent)						0.96%
Novation Agreement | Unsecured term loans | Euler Hermes
Long-Term Debt
Percentage of unsecured term loan guaranteed by an export credit agency						95.00%
Senior Unsecured Notes Due 2028 | Unsecured senior notes
Long-Term Debt
Principal						$ 1,500,000,000
Proceeds from issuance						$ 1,480,000,000
Interest rate						5.50%
Senior Unsecured Notes Due 2026 | Unsecured senior notes
Long-Term Debt
Proceeds from unsecured debt					$ 640,600,000
Principal					$ 650,000,000			$ 650,000,000
Interest rate					4.25%			4.25%
Silversea Cruises | Unsecured term loans
Long-Term Debt
Debt instrument, term		13 years
Silversea Cruises | Unsecured term loans | Euler Hermes
Long-Term Debt
Percentage of unsecured term loan guaranteed by an export credit agency		95.00%
Silversea Cruises | Secured senior notes
Long-Term Debt
Interest rate					7.25%			7.25%
Repayment of debt					$ 619,800,000
Term Loan | Unsecured term loans
Long-Term Debt
Repayment of debt								$ 130,000,000
August Unsecured Notes | Unsecured senior notes
Long-Term Debt
Proceeds from unsecured debt				$ 986,000,000
Interest rate				5.50%					11.50%
Repayment of debt				$ 928,000,000
Senior Secured Notes Due 2025 | Secured senior notes
Long-Term Debt
Principal									$ 1,400,000,000
Interest rate									11.50%				11.50%
Loss on extinguishment of debt									$ (141,900,000)

[1] Interest rates based on outstanding loan balance as of December 31, 2022 and, for variable rate debt, includes either LIBOR, EURIBOR or Term SOFR plus the applicable margin.