Cash And Cash Equivalents, Excluding Commercial Paper

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Commercial Paper, Maximum Borrowing Capacity

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Debt Instrument, Covenant, Maximum Additional Collateral or Reserves Potentially Needed

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Debt Instrument, Covenant, Monthly Minimum Liquidity Amount

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Increase (Decrease) In Liquidity Due To Deferrals Of Existing Debt Amortization

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Line Of Credit Facility, Maximum Borrowing Capacity, Increase

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Represents the number of cruise brands that operate ships.

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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Face amount or stated value per share of common stock.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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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.

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The level of ownership or equity interest acquired in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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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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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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General (Details) $ / shares in Units, € in Billions				1 Months Ended		3 Months Ended	6 Months Ended		7 Months Ended
General (Details) $ / shares in Units, € in Billions	Jul. 09, 2020 $ / shares shares	Jun. 30, 2020 USD ($) brand $ / shares shares	Jun. 30, 2020 EUR (€)	Aug. 03, 2020 USD ($)	May 31, 2020 GBP (£)	Jun. 30, 2020 USD ($) brand $ / shares shares	Jun. 30, 2020 USD ($) brand $ / shares shares	Jun. 30, 2020 GBP (£)	Aug. 03, 2020 USD ($)	Jun. 30, 2020 GBP (£) brand shares	Dec. 31, 2019 $ / shares	Dec. 31, 2019 GBP (£) shares	Jul. 31, 2018
Schedule of Equity Method Investments [Line Items]
Number of cruise brands \| brand		4				4	4			4
Common stock, shares issued (in shares) \| shares		237,187,862				237,187,862	237,187,862			237,187,862		236,547,842
Common stock, par value (in dollars per share) \| $ / shares		$ 0.01				$ 0.01	$ 0.01				$ 0.01
Liquidity		$ 4,100,000,000				$ 4,100,000,000	$ 4,100,000,000
Long-term debt		5,500,000,000				5,500,000,000	5,500,000,000
Commercial paper \| £					£ 300,000,000.0			£ 300,000,000.0
Debt covenant, monthly minimum liquidity						300,000,000	500,000,000.0
Maximum additional collateral or reserves potentially needed		75,000,000				75,000,000	75,000,000
Commercial Paper
Schedule of Equity Method Investments [Line Items]
Borrowings outstanding		370,800,000				370,800,000	370,800,000			£ 300,000,000.0		£ 1,400,000,000
Hapag-Lloyd Cruises \| TUI Cruises
Schedule of Equity Method Investments [Line Items]
Purchase price		1,300,000,000	€ 1.2
Silversea Cruises
Schedule of Equity Method Investments [Line Items]
Percentage of business acquired													66.70%
Subsequent Event
Schedule of Equity Method Investments [Line Items]
Interest acquired	33.30%
Common stock, shares issued (in shares) \| shares	5,200,000
Common stock, par value (in dollars per share) \| $ / shares	$ 0.01
Increase in liquidity									$ 900,000,000
Debt covenant, monthly minimum liquidity				$ 500,000,000.0
Revolving Credit Facility
Schedule of Equity Method Investments [Line Items]
Increase to revolving credit facility		600,000,000				600,000,000	600,000,000
Long-term debt		$ 11,000,000,000.0				11,000,000,000.0	$ 11,000,000,000.0
Debt covenant, monthly minimum liquidity						$ 300,000,000.0
TUI Cruises
Schedule of Equity Method Investments [Line Items]
Investment in a joint venture, percentage of interest		50.00%				50.00%	50.00%			50.00%
TUI Cruises \| Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Investment in a joint venture, percentage of interest		50.00%				50.00%	50.00%			50.00%
Pullmantur Holdings
Schedule of Equity Method Investments [Line Items]
Investment in a joint venture, percentage of interest		49.00%				49.00%	49.00%			49.00%