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Fair Value Measurements, Derivative Instruments and Hedging Activities - Sale and Impairment of Ships (Details) $ in Millions | 3 Months Ended
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Nov. 30, 2014 USD ($) Passenger | May 31, 2014 USD ($) Passenger
Grand Holiday |  |
Property, Plant and Equipment [Line Items] |  |
Passenger Capacity | Passenger | 1,440 |
Impairment of long-lived assets to be disposed of | $ | $ 31 |
Grand Celebration |  |
Property, Plant and Equipment [Line Items] |  |
Passenger Capacity | Passenger |  | 1,490
Impairment of long-lived assets to be disposed of | $ |  | $ 22

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- Definition Passenger capacity is calculated based on two passengers per cabin even though some cabins can accommodate three or more passengers. + References No definition available. + Details
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Namespace Prefix: | ccl_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2611-110228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=ccl_GrandCelebrationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |