Fair Value Measurements, Derivative Instruments and Hedging Activities and Financial Risk - Foreign Currency Exchange Risks (Details) $ in Millions	Nov. 30, 2017 USD ($)
Fair Value, Measurement Inputs, Disclosure [Line Items]
Foreign currency contract commitments	$ 6,800
Euro Denominated
Fair Value, Measurement Inputs, Disclosure [Line Items]
Debt instrument	5,300
Sterling Denominated Debt
Fair Value, Measurement Inputs, Disclosure [Line Items]
Debt instrument	$ 415
Foreign currency zero cost collars \| Cash Flow Hedging \| Carnival Horizon
Fair Value, Measurement Inputs, Disclosure [Line Items]
Weighted-Average Floor Rate	1.02
Weighted- Average Ceiling Rate	1.25
Foreign currency zero cost collars \| Cash Flow Hedging \| Seabourn Ovation
Fair Value, Measurement Inputs, Disclosure [Line Items]
Weighted-Average Floor Rate	1.02
Weighted- Average Ceiling Rate	1.25
Foreign currency zero cost collars \| Cash Flow Hedging \| Nieuw Statendam
Fair Value, Measurement Inputs, Disclosure [Line Items]
Weighted-Average Floor Rate	1.05
Weighted- Average Ceiling Rate	1.25

Fair Value, Measurement Inputs, Disclosure [Line Items]

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Average cap rate on a group of foreign currency derivatives for example, but not limited to, caps or collars.

+ References

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Average floor rate on a group of foreign currency derivatives for example, but not limited to, floors or collars.

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- Definition

This item represents disclosure of all significant concentrations of credit risk or market risk arising from the subject financial instrument (as defined), whether from an individual counterparty or groups of counterparties.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 23
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13587-108611

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-Paragraph 21
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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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-Name Accounting Standards Codification
-Topic 942
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-Topic 210
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