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Operating Segments and Geographic Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2025 USD ($) destination segment	Mar. 31, 2024 USD ($)
Segment Reporting Information [Line Items]
Number of Operating Segments | segment	1
Number of Reportable Segments | segment	1
Number of destinations | destination	33
Summarization of operating revenues by geographic regions
Total operating revenues | $	$ 2,140	$ 2,209
Europe
Segment Reporting Information [Line Items]
Number of destinations | destination	5
PUERTO RICO
Segment Reporting Information [Line Items]
Number of destinations | destination	3
VIRGIN ISLANDS, US
Segment Reporting Information [Line Items]
Number of destinations | destination	2
Domestic & Canada
Summarization of operating revenues by geographic regions
Total operating revenues | $	$ 1,280	1,376
Caribbean & Latin America
Summarization of operating revenues by geographic regions
Total operating revenues | $	796	767
Atlantic
Summarization of operating revenues by geographic regions
Total operating revenues | $	$ 64	$ 66

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