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Financial Derivative Instruments - Narrative (Details) - Fuel derivative contracts $ in Millions | 3 Months Ended
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Jun. 30, 2025 USD ($)
Derivative [Line Items] |
Proceeds from derivative instrument | $ 40
Amount of loss reclassified from AOCI into income | 36
Amount of loss remaining in AOCI related to closed fuel hedging contracts | $ 209

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