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Special Items (Details) - USD ($)	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Special items
Spirit-related costs		$ 532,000,000
Voluntary opt-out costs		15,000,000
Embraer E190 fleet transition costs		15,000,000
Total special items	$ 0	$ 562,000,000

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- Definition

Operating special items during period

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No definition available.

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- Definition

Operating Special Items

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- Definition

Special items relating to the EMBRAER E190 fleet transition.

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No definition available.

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- Definition

Special Items, Voluntary Opt-out Costs

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No definition available.

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- Definition

Spirit Airlines, Inc. Acquisition Related Expenses

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No definition available.

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