Debt - Narrative (Details) $ in Millions, € in Billions, £ in Billions	9 Months Ended
	Aug. 31, 2024 USD ($) cruise_ship identity	Aug. 31, 2023 USD ($)	Sep. 27, 2024 USD ($)	Aug. 31, 2024 EUR (€) cruise_ship	Aug. 31, 2024 GBP (£) cruise_ship	Jul. 01, 2024	Apr. 30, 2024 USD ($)	Nov. 30, 2023 USD ($)
Schedule of Debt Outstanding [Line Items]
Total Debt, net of unamortized debt issuance costs and discounts	$ 28,856							$ 30,572
Prepayment amount	41	$ 67
Ships and ship improvements	40,000
Vessels and material intellectual property	22,800
Vessels and related assets	21,200
Debt instrument, convertible, equity component minimum threshold	$ 5,000
Debt Instrument, Debt Covenant, Period Four
Schedule of Debt Outstanding [Line Items]
Debt instrument, debt covenant, required debt to capital covenant (as a percent)	65.00%
Guarantor Subsidiaries
Schedule of Debt Outstanding [Line Items]
Prepayment amount	$ 3,500
Revolving facility
Schedule of Debt Outstanding [Line Items]
Debt instrument, convertible, liquidity component minimum threshold	$ 1,500
Revolving facility | May 31, 2025 testing date
Schedule of Debt Outstanding [Line Items]
Debt instrument, debt covenant, required interest coverage covenant, ratio	2.0
Revolving facility | November 30, 2025 testing date
Schedule of Debt Outstanding [Line Items]
Debt instrument, debt covenant, required interest coverage covenant, ratio	2.5
Revolving facility | February 28, 2026 testing date onwards
Schedule of Debt Outstanding [Line Items]
Debt instrument, debt covenant, required interest coverage covenant, ratio	3.0
Revolving credit facility
Schedule of Debt Outstanding [Line Items]
Available for borrowing	$ 3,000
Carnival Holdings (Bermuda) II Limited | Revolving facility
Schedule of Debt Outstanding [Line Items]
Line of credit facility, maximum borrowing capacity	3,000
Carnival Holdings (Bermuda) II Limited | Multi-Currency Revolving Facility
Schedule of Debt Outstanding [Line Items]
Line of credit facility, maximum borrowing capacity	1,900			€ 0.9	£ 0.1
Senior Priority Notes Due 2028 | Carnival Bermuda (Holdings) Limited
Schedule of Debt Outstanding [Line Items]
Ships and ship improvements	$ 8,000
Number of unencumbered vessels | cruise_ship	12			12	12
Changes in identity of vessels | identity	0
Senior Priority Notes Due 2028 | Secured | Carnival Bermuda (Holdings) Limited
Schedule of Debt Outstanding [Line Items]
Total Debt, net of unamortized debt issuance costs and discounts	$ 2,000
Costa Term Loan Facility | Secured
Schedule of Debt Outstanding [Line Items]
Total Debt, net of unamortized debt issuance costs and discounts	250
Costa Term Loan Facility | Secured | Costa Crociere S.p.A
Schedule of Debt Outstanding [Line Items]
Total Debt, net of unamortized debt issuance costs and discounts	$ 300
Export Credit Facility | May 31, 2025 testing date
Schedule of Debt Outstanding [Line Items]
Debt instrument, debt covenant, required interest coverage covenant, ratio	2.0
Export Credit Facility | November 30, 2025 testing date
Schedule of Debt Outstanding [Line Items]
Debt instrument, debt covenant, required interest coverage covenant, ratio	2.5
Export Credit Facility | February 28, 2026 testing date onwards
Schedule of Debt Outstanding [Line Items]
Debt instrument, debt covenant, required interest coverage covenant, ratio	3.0
Export Credit Facility | Line of credit | Sun Princess Limited
Schedule of Debt Outstanding [Line Items]
Debt instrument, face amount	$ 900
Export Credit Facility | Line of credit | Sun Princess II Limited
Schedule of Debt Outstanding [Line Items]
Debt instrument, face amount	$ 100
2028 Secured Term Loan Facility | Line of credit
Schedule of Debt Outstanding [Line Items]
Line of credit facility, maximum borrowing capacity							$ 1,700
2027 Secured Term Loan Facility | Line of credit
Schedule of Debt Outstanding [Line Items]
Line of credit facility, maximum borrowing capacity							1,000
Senior Unsecured Notes Due 2030 | Unsecured Debt
Schedule of Debt Outstanding [Line Items]
Debt instrument, face amount							$ 535
Euro-denominated Notes Payable Due March 2026 | Unsecured Debt | Guarantor Subsidiaries
Schedule of Debt Outstanding [Line Items]
Debt instrument, interest rate (as a percent)	7.60%			7.60%	7.60%
Notes Payable Due August 2027 | Secured | Guarantor Subsidiaries
Schedule of Debt Outstanding [Line Items]
Debt instrument, interest rate (as a percent)	9.90%			9.90%	9.90%
Notes Payable Due March 2027 | Unsecured Debt | Guarantor Subsidiaries
Schedule of Debt Outstanding [Line Items]
Debt instrument, interest rate (as a percent)	5.80%			5.80%	5.80%
Export Credit Facility Due 2035 | Line of credit
Schedule of Debt Outstanding [Line Items]
Debt instrument, face amount	$ 2,300
Value of vessels subject to negative pledges	18,900
Convertible Senior Notes Due 2024 | Subsequent Event
Schedule of Debt Outstanding [Line Items]
Convertible notes payable			$ 426
Convertible Senior Notes Due 2024 | Guarantor Subsidiaries
Schedule of Debt Outstanding [Line Items]
Debt instrument, interest rate (as a percent)						5.80%
Revolving Facility Notes Due 2028 | Carnival Bermuda (Holdings) Limited
Schedule of Debt Outstanding [Line Items]
Ships and ship improvements	$ 2,800
Number of unencumbered vessels | cruise_ship	3			3	3