Derivative instrument, Credit Risk Exposure

No definition available.

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Balance Type:	credit
Period Type:	duration

- Definition

Maximum length of time over which the entity is hedging its exposure.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Percentage of Aggregate Cost Exposed to Fluctuations in the Euro Exchange Rate.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Purchase Contract, Deposit.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
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-Publisher FASB
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Balance Type:	na
Period Type:	duration

- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

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-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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-URI https://asc.fasb.org//1943274/2147480434/815-10-50-1A

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount, before tax, of realized and unrealized gain (loss) from foreign currency transaction.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(7))
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of gain (loss) recognized in earnings in the period from the increase (decrease) in fair value of foreign currency derivatives not designated as hedging instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-SubTopic 10
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Section S99
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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The minimum amount the entity agreed to spend under the long-term purchase commitment.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Nominal or face amount used to calculate payments on a nonderivative instrument.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Details

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- Details

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- Details

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Data Type:	na
Balance Type:
Period Type:

- Details

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- Details

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- Details

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Fair Value Measurements and Derivative Instruments - Derivative Instruments, Interest Rate Risk, Foreign Currency Exchange Rate Risk (Narrative) (Details) € in Millions, $ in Millions	3 Months Ended			6 Months Ended		12 Months Ended
	Mar. 31, 2024 USD ($)	Mar. 31, 2024 EUR (€)	Mar. 31, 2023 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2023 EUR (€)	Dec. 31, 2023 USD ($)
Gains and losses from derivatives involved in hedging relationships
Derivative instrument, credit risk exposure	$ 149
Maximum length of time hedged in derivative contract	3 years	3 years
Percentage of debt bearing fixed interest	86.30%					83.20%
Aggregate cost of ships on order, not including partner brands on order	$ 8,100
Amount deposited for cost of ships on order	$ 748
Percentage of aggregate cost exposed to fluctuations in the euro exchange rate	44.10%					43.50%
Foreign currency gain (loss)	$ 30		$ (11)
Foreign currency debt
Gains and losses from derivatives involved in hedging relationships
Carrying Value	712					$ 588
TUI Cruises \| Foreign currency debt
Gains and losses from derivatives involved in hedging relationships
Carrying Value	712	€ 659		$ 716	€ 648
Interest rate swaps
Gains and losses from derivatives involved in hedging relationships
Notional amount	1,600					1,600
Foreign currency forward contracts \| Not Designated
Gains and losses from derivatives involved in hedging relationships
Notional amount	1,100		1,200
Gain (loss) fair value of foreign currency forward contracts recognized in earnings	(35)		$ 4
Foreign exchange contracts
Gains and losses from derivatives involved in hedging relationships
Notional amount	$ 2,900					$ 2,900