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Revenue Recognition - Schedule of Operating Revenues by Principal Geographic Region (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Total operating revenues	$ 3,724	$ 3,775	$ 3,589
Domestic
Disaggregation of Revenue [Line Items]
Total operating revenues	3,547	3,565	3,315
Latin America
Disaggregation of Revenue [Line Items]
Total operating revenues	$ 177	$ 210	$ 274

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