Debt (2022 Debt Financing Transactions) (Details) $ / shares in Units, € in Billions		1 Months Ended				12 Months Ended
		Aug. 31, 2022 USD ($) $ / shares	Jul. 31, 2022 USD ($)	Apr. 30, 2022 EUR (€)	Jan. 31, 2022 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Nov. 30, 2023	Jun. 30, 2023	Oct. 31, 2022 USD ($)	Feb. 28, 2022
Long-Term Debt
Debt related to acquisition of property and equipment						$ 0	$ 277,000,000	$ 0
Loss on extinguishment of debt						$ 121,000,000	94,000,000	$ 139,000,000
Minimum | Up-front payment arrangement
Long-Term Debt
Credit agency fees, percentage of loan amount payable						2.35%
Maximum | Up-front payment arrangement
Long-Term Debt
Credit agency fees, percentage of loan amount payable						5.48%
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 term loans | Minimum
Long-Term Debt
Interest rate	[1]					1.28%
Unsecured term loans | Maximum
Long-Term Debt
Interest rate	[1]					5.89%
Convertible notes
Long-Term Debt
Principal						$ 1,150,000,000	1,725,000,000
Convertible notes | Minimum
Long-Term Debt
Interest rate	[1]					6.00%
Secured senior notes | Minimum
Long-Term Debt
Interest rate	[1]					8.25%
Senior Notes Due 2027 | Unsecured senior notes
Long-Term Debt
Principal					$ 1,000,000,000
Proceeds from issuance of senior notes							990,000,000
Interest rate					5.375%
Novation Agreement, July 2017 | BpiFAE
Long-Term Debt
Percentage of unsecured term loan guaranteed by an export credit agency					100.00%
Novation Agreement, July 2017 | Unsecured term loans
Long-Term Debt
Interest rate					3.18%
Proceeds from unsecured debt					$ 1,300,000,000
Debt instrument, term (in years)					12 years
Unsecured Term Loan Agreement | BpiFAE
Long-Term Debt
Percentage of unsecured term loan guaranteed by an export credit agency				100.00%
Unsecured Term Loan Agreement | Unsecured term loans
Long-Term Debt
Interest rate				1.28%
Proceeds from unsecured debt				€ 0.7		$ 800,000,000	700,000,000
Debt instrument, term (in years)				12 years
Silversea Cruises | Unsecured term loans
Long-Term Debt
Debt instrument, term (in years)			13 years
Debt related to acquisition of property and equipment			$ 277,000,000
Silversea Cruises | Unsecured term loans | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Long-Term Debt
Debt Floating Rate			1.25%
Silversea Cruises | Unsecured term loans | Euler Hermes
Long-Term Debt
Percentage of unsecured term loan guaranteed by an export credit agency			95.00%
Convertible Senior Notes Due 2025 | Convertible notes
Long-Term Debt
Principal		$ 1,150,000,000
Interest rate		6.00%
Conversion ratio		0.0199577
Conversion price (in dollars per share) | $ / shares		$ 50.11
Repayment of debt		$ 1,150,000,000
Loss on extinguishment of debt							12,800,000
Convertible Notes Due 2023 | Convertible notes
Long-Term Debt
Repurchase amount		$ 800,000,000
Convertible Senior Notes 4.25%, Due 2023 | Convertible notes
Long-Term Debt
Interest rate		4.25%								4.25%
Convertible Senior Notes 2.875%, Due 2023 | Convertible notes
Long-Term Debt
Interest rate		2.875%							2.875%
Repurchase amount		$ 350,000,000
Senior Unsecured Notes 11.625%, Due 2027 | Unsecured senior notes
Long-Term Debt
Principal		$ 1,250,000,000
Proceeds from issuance of senior notes							1,230,000,000
Interest rate		11.625%
Fixed Rate 5.25% Debt | Unsecured senior notes
Long-Term Debt
Interest rate		5.25%
Repayment of debt		$ 650,000,000
Senior Guaranteed Notes 9.250%, Due 2029 | Unsecured senior notes
Long-Term Debt
Principal											$ 1,000,000,000
Interest rate											9.25%
Senior Secured Notes Due 2029 | Secured senior notes
Long-Term Debt
Principal											$ 1,000,000,000
Interest rate											8.25%
Senior Secured Notes Due 2025 | Secured senior notes
Long-Term Debt
Interest rate						11.50%					11.50%
Repayment of debt						$ 1,400,000,000
Loss on extinguishment of debt						$ 105,000,000
Senior Guaranteed Notes | Unsecured senior notes
Long-Term Debt
Interest rate												9.125%
Senior Secured Notes Due 2023 | Unsecured senior notes
Long-Term Debt
Interest rate												10.875%
Senior Priority Guaranteed Notes Due 2023 And Senior Secured Notes Due 2023 | Secured senior notes
Long-Term Debt
Loss on extinguishment of debt							$ 77,000,000

[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.