Changes in Accumulated Other Comprehensive Loss - Schedule of Reclassifications Out of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense, net of interest capitalized	$ (278)	$ (249)
Depreciation and amortization expenses	(461)	(412)
Income before income taxes	(976)	(751)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Income \| Changes related to cash flow derivative hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes	18	5
Interest rate swaps \| Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Income \| Changes related to cash flow derivative hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense, net of interest capitalized	4	7
Foreign currency forward contracts \| Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Income \| Changes related to cash flow derivative hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Depreciation and amortization expenses	(5)	(6)
Fuel swaps \| Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Income \| Changes related to cash flow derivative hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Fuel	$ 19	$ 4

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

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