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v3.24.3

Unusual or Infrequently Occurring Items (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |
Special items - Impairment charges and other | $ 74 | $ 156 | $ 254 | $ 406
Special items - net non-operating | 1 | 8 | 1 | 14
Fleet transition - impairment [Member] |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |
Special items - Impairment charges and other | (16) | $ 156 | 51 | 355
Litigation |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |
Special items - Impairment charges and other |  |  | 45 |
Wages and Benefits [Member] |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |
Special items - Impairment charges and other |  |  | 30 | $ 51
Integration costs |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |
Special items - Impairment charges and other | $ 90 |  | $ 128 |

X
- Definition Special items - Net non-operating + References No definition available. + Details
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Namespace Prefix: | alk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Special items - operating + References No definition available. + Details
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Namespace Prefix: | alk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |