Debt - Narrative (Details) £ in Millions		1 Months Ended							3 Months Ended			9 Months Ended
		Apr. 30, 2024 USD ($)	Oct. 31, 2023 USD ($)	Oct. 31, 2022 USD ($)	Apr. 30, 2022 USD ($)	Aug. 31, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($) ship	Sep. 30, 2021 USD ($) ship	Jun. 30, 2021 USD ($)	Mar. 31, 2021 GBP (£)	Sep. 30, 2021 USD ($) ship	Sep. 30, 2020 USD ($)
Long-Term Debt
Debt instrument, collateral amount									$ 162,300,000			$ 162,300,000
Credit card processor agreement, maximum exposure									$ 237,700,000			$ 237,700,000
Number of cruise ships | ship									60			60
Debt repayment											£ 300.0	$ 135,372,000	$ 0
Loss on extinguishment of debt												138,759,000	$ 41,109,000
Debt covenant, monthly minimum liquidity												$ 350,000,000
Non-Export Credit Facilities
Long-Term Debt
Long-term debt								$ 4,900,000,000
Export Credit Facilities
Long-Term Debt
Long-term debt								6,300,000,000
Deferred principal payments								$ 1,150,000,000
Unsecured Term Loans Guaranteed by Export Credit Agencies
Long-Term Debt
Credit agency fees, percentage of outstanding loan balance												2.97%
RCI Holdings LLC | Subsidiaries
Long-Term Debt
Number of cruise ships | ship								7
Revolving Credit Facility
Long-Term Debt
Maximum borrowing capacity									$ 100,000,000			$ 100,000,000
Revolving Credit Facility | Unsecured Revolving Credit Facility Due 2024
Long-Term Debt
Maximum borrowing capacity								$ 1,550,000,000	1,600,000,000			1,600,000,000
Extension term								18 months
Prepayment and commitment reduction, as a percentage of outstanding advances and commitments								20.00%
Aggregate borrowing capacity									1,300,000,000			1,300,000,000
Line of Credit | Term Loan Facility, $700 Million
Long-Term Debt
Maximum borrowing capacity								$ 700,000,000	700,000,000			$ 700,000,000
Extension term								1 year
Increase limit								$ 300,000,000
Line of Credit | LIBOR | Term Loan Facility, $700 Million
Long-Term Debt
Debt instrument, basis spread on variable rate								3.75%
Scenario, Forecast
Long-Term Debt
Deferred principal payments, repayment period					5 years
Scenario, Forecast | Revolving Credit Facility | Unsecured Revolving Credit Facility Due 2024
Long-Term Debt
Line of credit terminated		$ 1,100,000,000		$ 200,000,000
Minimum | Contract With Customer, Liability, Up-Front Payment Arrangement
Long-Term Debt
Credit agency fees, percentage of loan amount payable												2.35%
Maximum | Contract With Customer, Liability, Up-Front Payment Arrangement
Long-Term Debt
Credit agency fees, percentage of loan amount payable												5.48%
Revolving Credit Facility
Long-Term Debt
Maximum borrowing capacity									3,200,000,000			$ 3,200,000,000
Revolving Credit Facility | Unsecured Revolving Credit Facility Due 2024
Long-Term Debt
Maximum borrowing capacity									1,300,000,000			$ 1,300,000,000
Revolving Credit Facility | Maximum | LIBOR | Unsecured Revolving Credit Facility Due 2024
Long-Term Debt
Debt instrument, basis spread on variable rate												1.70%
Unsecured term loans | Unsecured Term Loan Agreement
Long-Term Debt
Debt instrument, face amount								$ 1,000,000,000	1,000,000,000			$ 1,000,000,000
Extension term								18 months
Prepayment and commitment reduction, as a percentage of outstanding advances and commitments								20.00%
Long-term debt									900,000,000			900,000,000
Unsecured term loans | Novation Agreement
Long-Term Debt
Unsecured debt									$ 994,100,000			$ 994,100,000
Debt instrument, term								12 years
Bank financing commitment percentage									80.00%			80.00%
Percentage of premium payable									100.00%			100.00%
Unsecured term loans | Term Loan
Long-Term Debt
Debt repayment										$ 130,000,000
Unsecured term loans | LIBOR | Novation Agreement
Long-Term Debt
Debt instrument, basis spread on variable rate								0.96%
Unsecured term loans | Euler Hermes | Novation Agreement
Long-Term Debt
Percentage guaranteed by export credit agency								95.00%
Unsecured term loans | Scenario, Forecast | Unsecured Term Loan Agreement
Long-Term Debt
Debt terminated			$ 600,000,000		$ 300,000,000
Unsecured term loans | Minimum
Long-Term Debt
Interest rate	[1]								2.53%			2.53%
Unsecured term loans | Maximum
Long-Term Debt
Interest rate	[1]								5.41%			5.41%
Unsecured senior notes | Senior Unsecured Notes Due 2028
Long-Term Debt
Debt instrument, face amount								$ 1,500,000,000
Proceeds from issuance								$ 1,480,000,000
Interest rate								5.50%
Unsecured senior notes | Senior Unsecured Notes Due 2026
Long-Term Debt
Debt instrument, face amount							$ 650,000,000		$ 650,000,000	$ 650,000,000		$ 650,000,000
Interest rate							4.25%			4.25%
Proceeds from debt issuance							$ 640,600,000
Unsecured senior notes | August Unsecured Notes
Long-Term Debt
Debt instrument, face amount						$ 1,000,000,000
Interest rate						5.50%
Proceeds from debt issuance						$ 986,000,000
Unsecured senior notes | Minimum
Long-Term Debt
Interest rate	[1]								3.70%			3.70%
Unsecured senior notes | Maximum
Long-Term Debt
Interest rate	[1]								9.13%			9.13%
Secured senior notes | Silversea Notes
Long-Term Debt
Interest rate							7.25%			7.25%
Debt repayment							$ 619,800,000
Secured senior notes | Senior Secured Notes Due 2025
Long-Term Debt
Interest rate									11.50%			11.50%
Debt repayment						$ 928,000,000
Loss on extinguishment of debt									$ 141,900,000			$ 141,900,000
Secured senior notes | Senior Secured Notes
Long-Term Debt
Debt instrument, face amount									$ 3,320,000,000			$ 3,320,000,000
Interest rate									10.875%			10.875%
Secured senior notes | Minimum
Long-Term Debt
Interest rate	[1]								10.88%			10.88%
Secured senior notes | Maximum
Long-Term Debt
Interest rate	[1]								11.50%			11.50%

[1] Interest rates based on outstanding loan balance as of September 30, 2021 and, for variable rate debt, include either LIBOR or EURIBOR plus the applicable margin.