OPERATING SEGMENT INFORMATION, ASSETS (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Total assets	$ 19,559	$ 14,613
Alaska Airlines [Member]
Total assets	20,911	19,937
Consolidating and Other [Member]
Total assets	$ (6,352)	$ (5,324)

Amount of asset recognized for present right to economic benefit.

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+ Details