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v3.25.3

Leases - Narrative (Details) - ft² | Dec. 31, 2023 | Dec. 30, 2023
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Leases [Abstract] |  |
Office space (in square feet) | 83,939 | 125,468

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- Definition Lessee, Operating Lease, Office Space + References No definition available. + Details
Name: | alk_LesseeOperatingLeaseOfficeSpace
Namespace Prefix: | alk_
Data Type: | dtr-types:areaItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_LeasesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration