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Changes in Accumulated Other Comprehensive Loss - Schedule of Reclassifications Out of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Interest rate swaps | $ (228) | $ (298) | $ (477) | $ (721)
Depreciation and amortization expenses | (417) | (393) | (829) | (780)
Other (expense) income | (6) | (3) | (17) | (11)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Income | Gain (loss) on cash flow derivative hedges: |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Total reclassifications for the period | (4) | 17 | 1 | 29
Interest rate swaps | Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Income | Gain (loss) on cash flow derivative hedges: |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Interest rate swaps | 6 | 12 | 13 | 25
Foreign currency forward contracts | Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Income | Gain (loss) on cash flow derivative hedges: |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Depreciation and amortization expenses | (6) | (6) | (12) | (11)
Other (expense) income | 0 | 0 | 0 | 0
Fuel swaps | Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Income | Gain (loss) on cash flow derivative hedges: |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Other (expense) income | 0 | 0 | 0 | 0
Fuel | $ (4) | $ 11 | $ 0 | $ 15

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