Contingencies (Details) $ in Millions	Aug. 31, 2017 USD ($)
Lease Out And Lease Back Type Transactions
Loss Contingencies [Line Items]
Estimated contingent obligations	$ 122

A liability that is not currently a liability but may become one upon the happening of some future event. It is an obligation that may result, but is not likely to result because the event causing the obligation is improbable. If the event becomes probable and reasonable estimable, then it's considered a liability.

No definition available.

Name:	ccl_ContingentObligations
Namespace Prefix:	ccl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant