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Fair Value Measurements, Derivative Instruments and Hedging Activities and Financial Risks - Foreign Currency Exchange Rate Risks (Details) | Feb. 28, 2018 USD ($)
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Fair Value, Measurement Inputs, Disclosure [Line Items] |
Foreign currency contract commitments | $ 8,200,000,000
Foreign currency zero cost collars – cash flow hedges | Carnival Horizon | Cash Flow Hedging |
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 hedges | Seabourn Ovation | Cash Flow Hedging |
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 hedges | Nieuw Statendam | Cash Flow Hedging |
Fair Value, Measurement Inputs, Disclosure [Line Items] |
Weighted-Average Floor Rate | 1.05
Weighted- Average Ceiling Rate | 1.25
Euro-denominated |
Fair Value, Measurement Inputs, Disclosure [Line Items] |
Debt instrument, face amount | $ 5,600,000,000.0
Sterling-denominated |
Fair Value, Measurement Inputs, Disclosure [Line Items] |
Debt instrument, face amount | $ 924,000,000

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