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Fair Value Measurements and Derivative Instruments (Concentrations of Credit Risk) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract] |  |
Derivative instrument, credit risk exposure | $ 26.9 | $ 0.0

X
- Definition Derivative Instrument, Credit Risk Exposure + References No definition available. + Details
Name: | rcl_DerivativeInstrumentCreditRiskExposure
Namespace Prefix: | rcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration