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Operating Segments and Geographic Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($) segment destination	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	1
Number of operating segments | segment	1
Number of destinations | destination	33
Summarization of operating revenues by geographic regions
Total operating revenue | $	$ 9,279	$ 9,615	$ 9,158
Europe
Segment Reporting Information [Line Items]
Number of destinations | destination	5
Puerto Rico
Segment Reporting Information [Line Items]
Number of destinations | destination	3
U.S Virgin Islands
Segment Reporting Information [Line Items]
Number of destinations | destination	2
Domestic & Canada
Summarization of operating revenues by geographic regions
Total operating revenue | $	$ 5,640	6,072	6,067
Caribbean & Latin America
Summarization of operating revenues by geographic regions
Total operating revenue | $	3,169	3,282	2,968
Atlantic
Summarization of operating revenues by geographic regions
Total operating revenue | $	$ 470	$ 261	$ 123

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