Debt - Narrative (Details) $ in Millions	1 Months Ended	3 Months Ended	9 Months Ended
	Aug. 31, 2023 USD ($) cruise_ship Rate	Aug. 31, 2023 USD ($) cruise_ship Rate	Aug. 31, 2023 USD ($) cruise_ship identity Rate	May 31, 2023 USD ($)	Nov. 30, 2022 USD ($)
Debt Instrument [Line Items]
Total debt	$ 31,296	$ 31,296	$ 31,296		$ 34,546
Short-term borrowings	0	0	0		$ 200
Ships and ship improvements	37,300	37,300	37,300
Vessels and material intellectual property	23,200	23,200	23,200
Vessels and related assets	21,600	21,600	21,600
Debt instrument, convertible, equity component minimum threshold			5,000
Debt instrument, convertible, liquidity component minimum threshold			$ 1,500
Before May 31, 2023 testing date
Debt Instrument [Line Items]
Debt instrument, debt covenant, required debt to capital covenant (percent)			72.50%
May 31, 2024 testing date onwards
Debt Instrument [Line Items]
Debt instrument, debt covenant, required debt to capital covenant (percent)			65.00%
New revolving facility
Debt Instrument [Line Items]
Debt instrument, convertible, liquidity component minimum threshold			$ 1,500
New revolving facility | May 31, 2025 testing date
Debt Instrument [Line Items]
Debt instrument, debt covenant, required interest coverage covenant, ratio			2.0
New revolving facility | November 30, 2025 testing date
Debt Instrument [Line Items]
Debt instrument, debt covenant, required interest coverage covenant, ratio			2.5
New revolving facility | February 28, 2026 testing date onwards
Debt Instrument [Line Items]
Debt instrument, debt covenant, required interest coverage covenant, ratio			3.0
Revolving credit facility
Debt Instrument [Line Items]
Available for borrowing	2,900	2,900	$ 2,900
Export Credit Facility 1 | May 31, 2025 testing date
Debt Instrument [Line Items]
Debt instrument, debt covenant, required interest coverage covenant, ratio			2.0
Export Credit Facility 1 | November 30, 2025 testing date
Debt Instrument [Line Items]
Debt instrument, debt covenant, required interest coverage covenant, ratio			2.5
Export Credit Facility 1 | February 28, 2026 testing date onwards
Debt Instrument [Line Items]
Debt instrument, debt covenant, required interest coverage covenant, ratio			3.0
Secured | Costa Term Loan Facility
Debt Instrument [Line Items]
Total debt	250	250	$ 250
Secured | 2029 Senior Secured Notes
Debt Instrument [Line Items]
Long-term line of credit	$ 500	500	500
Line of credit facility, commitment fee percentage | Rate	7.00%
Secured | Senior Secured First Lien Term Loan B Facility
Debt Instrument [Line Items]
Long-term line of credit	$ 1,300	1,300	$ 1,300
Secured | Redemptions and Retirements Due 2026
Debt Instrument [Line Items]
Debt instrument, redemption of principal amount		$ 775
Debt instrument, interest rate (as a percent) | Rate	10.50%	10.50%	10.50%
Secured | Secured Subsidiary EUR Redemptions and Retirements Due 2026
Debt Instrument [Line Items]
Debt instrument, redemption of principal amount		$ 465
Debt instrument, interest rate (as a percent) | Rate	10.10%	10.10%	10.10%
Secured | Senior Secured Redemptions and Retirements Notes Due 2027
Debt Instrument [Line Items]
Debt instrument, interest rate (as a percent) | Rate	9.90%	9.90%	9.90%
Long term debt value retired		$ 30
Line of credit | Senior Secured First Lien Term Loan B Facility
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage | Rate	3.00%
Line of credit | Senior Secured First Lien Term Loan B Facility | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage | Rate	0.75%
Line of credit | Export Credit Facility Due 2035
Debt Instrument [Line Items]
Debt instrument, face amount	$ 1,100	1,100	$ 1,100
Debt instrument, repaid of floating rate			1,000
Value of vessels subject to negative pledges	$ 15,700	$ 15,700	15,700
Unsecured Debt | Export Credit Facility 1
Debt Instrument [Line Items]
Debt instrument, convertible, liquidity component minimum threshold			$ 1,500
Unsecured Debt | Redemptions and Retirements Due 2026
Debt Instrument [Line Items]
Debt instrument, interest rate (as a percent) | Rate	7.60%	7.60%	7.60%
Long term debt value retired		$ 88
Unsecured Debt | Redemptions and Retirements Due 2027
Debt Instrument [Line Items]
Debt instrument, interest rate (as a percent) | Rate	5.80%	5.80%	5.80%
Long term debt value retired		$ 240
Unsecured Debt | Redemptions and Retirements Due 2024
Debt Instrument [Line Items]
Long term debt value retired		750
Costa Crociere S.p.A | Secured | Costa Term Loan Facility
Debt Instrument [Line Items]
Total debt	$ 500	$ 500	$ 500
Carnival Bermuda (Holdings) Limited | Senior Priority Notes Due 2028
Debt Instrument [Line Items]
Number of unencumbered vessels | cruise_ship	12	12	12
Ships and ship improvements	$ 8,200	$ 8,200	$ 8,200
Changes in identity of vessels | identity			0
Carnival Bermuda (Holdings) Limited | Secured | Senior Priority Notes Due 2028
Debt Instrument [Line Items]
Total debt	2,000	2,000	$ 2,000
Sun Princess Limited | Line of credit | Export Credit Facility 1
Debt Instrument [Line Items]
Debt instrument, face amount	200	200	200
Sun Princess II Limited | Line of credit | Export Credit Facility 1
Debt Instrument [Line Items]
Debt instrument, face amount	100	100	100
Carnival Bermuda II (Holdings) Limited | New revolving facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity				$ 2,100
Line of credit facility, current borrowing capacity	$ 3,000	$ 3,000	$ 3,000	$ 2,900
Number of unencumbered vessels | cruise_ship	3	3	3