Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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Represents the maximum borrowing which the company has arranged for each ship constructed.

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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The percentage points added to the reference rate to compute the variable rate on the interest rate derivative.

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No definition available.

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Fixed interest rate related to the interest rate derivative.

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Variable interest rate in effect as of the balance sheet date related to the interest rate derivative.

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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.

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- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
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-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
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The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

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Fair Value Measurements and Derivative Instruments (Interest Rate Risk) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percentage of long-term debt with fixed interest rate	57.40%	40.50%
Interest rate swaps
Interest Rate Cash Flow Hedges [Abstract]
Notional amount	$ 3,800,000	$ 4,000,000
Cash flow hedge \| Interest rate swaps
Interest Rate Cash Flow Hedges [Abstract]
Notional Amount	2,961,623
Fair value hedging \| Interest rate swaps
Interest Rate Fair Value Hedges [Abstract]
Long-term debt	790,000
Oasis of the Seas Unsecured Term Loan \| Fair value hedging \| Interest rate swaps
Interest Rate Fair Value Hedges [Abstract]
Long-term debt	$ 140,000
Debt Fixed Rate	5.41%
Fixed Rate 5.25% Debt \| Fair value hedging \| Interest rate swaps
Interest Rate Fair Value Hedges [Abstract]
Long term debt, principal amount	$ 650,000
Debt Fixed Rate	5.25%
Floating Rate Celebrity Reflection Term Loan \| Cash flow hedge \| Interest rate swaps
Interest Rate Cash Flow Hedges [Abstract]
Notional Amount	$ 381,792
All-in Swap Fixed Rate	2.85%
Quantum of the Seas Unsecured Term Loan \| Cash flow hedge \| Interest rate swaps
Interest Rate Cash Flow Hedges [Abstract]
Notional Amount	$ 551,250
All-in Swap Fixed Rate	3.74%
Anthem of the Seas Unsecured Term Loan \| Cash flow hedge \| Interest rate swaps
Interest Rate Cash Flow Hedges [Abstract]
Notional Amount	$ 573,958
All-in Swap Fixed Rate	3.86%
Ovation of the Seas Unsecured Term Loan \| Cash flow hedge \| Interest rate swaps
Interest Rate Cash Flow Hedges [Abstract]
Notional Amount	$ 726,250
All-in Swap Fixed Rate	3.16%
Harmony of the Seas Unsecured Term Loan \| Cash flow hedge \| Interest rate swaps
Interest Rate Cash Flow Hedges [Abstract]
Notional Amount	$ 728,373
All-in Swap Fixed Rate	2.26%
London Interbank Offered Rate (LIBOR) \| Oasis of the Seas Unsecured Term Loan \| Fair value hedging \| Interest rate swaps
Interest Rate Fair Value Hedges [Abstract]
Swap Floating Rate: LIBOR plus	3.87%
All-in Swap Floating Rate	5.44%
London Interbank Offered Rate (LIBOR) \| Fixed Rate 5.25% Debt \| Fair value hedging \| Interest rate swaps
Interest Rate Fair Value Hedges [Abstract]
Swap Floating Rate: LIBOR plus	3.63%
All-in Swap Floating Rate	5.05%
London Interbank Offered Rate (LIBOR) \| Floating Rate Celebrity Reflection Term Loan \| Cash flow hedge \| Interest rate swaps
Interest Rate Cash Flow Hedges [Abstract]
Debt Floating Rate	0.40%
London Interbank Offered Rate (LIBOR) \| Quantum of the Seas Unsecured Term Loan \| Cash flow hedge \| Interest rate swaps
Interest Rate Cash Flow Hedges [Abstract]
Debt Floating Rate	1.30%
London Interbank Offered Rate (LIBOR) \| Anthem of the Seas Unsecured Term Loan \| Cash flow hedge \| Interest rate swaps
Interest Rate Cash Flow Hedges [Abstract]
Debt Floating Rate	1.30%
London Interbank Offered Rate (LIBOR) \| Ovation of the Seas Unsecured Term Loan \| Cash flow hedge \| Interest rate swaps
Interest Rate Cash Flow Hedges [Abstract]
Debt Floating Rate	1.00%
Euro Interbank Offered Rate (EURIBOR) \| Harmony of the Seas Unsecured Term Loan \| Cash flow hedge \| Interest rate swaps
Interest Rate Cash Flow Hedges [Abstract]
Debt Floating Rate	1.15%