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Fair Value Measurements and Derivative Instruments (Cash Flows From Derivative Instruments) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Fair Value Disclosures [Abstract] |  |  |
Cash paid on settlement of derivative financial instruments | $ (63,777) | $ (110,637) | $ (2,148)
Cash paid on settlement of derivative financial instruments | (553) | (323,839) | (180,745)
Cash received (paid) on settlement of derivative financial instruments | $ 63,224 | $ (213,202) | $ (178,597)

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- Definition The net cash (outflow) inflow associated with derivative instruments related to our investing activities. + References No definition available. + Details
Name: | rcl_CashPaidReceivedonSettlementofDerivativeFinancialInstruments
Namespace Prefix: | rcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The cash outflow associated with derivative instruments related to our investing activities. + References No definition available. + Details
Name: | rcl_CashPaidonSettlementofDerivativeFinancialInstruments
Namespace Prefix: | rcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash inflow associated with derivative instruments related to our investing activities. + References No definition available. + Details
Name: | rcl_CashReceivedonSettlementofDerivativeFinancialInstruments
Namespace Prefix: | rcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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