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EMPLOYEE BENEFIT PLANS - Asset Allocation (Details) | Dec. 31, 2024 | Dec. 31, 2023
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Qualified Defined Benefit Plan - Salaried | Alaska Air Group |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Actual Allocations | 100.00% | 100.00%
Qualified Defined Benefit Plan - Salaried | Hawaiian Holdings, Inc. |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target Allocations | 100.00% |
Actual Allocations | 100.00% |
Pension Plan | Alaska Air Group |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Actual Allocations | 100.00% | 100.00%
Equity securities | Qualified Defined Benefit Plan - Salaried | Hawaiian Holdings, Inc. |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target Allocations | 60.00% |
Actual Allocations | 52.00% |
Domestic equity securities | Qualified Defined Benefit Plan - Salaried | Alaska Air Group |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Actual Allocations | 0.00% | 7.00%
Domestic equity securities | Pension Plan | Alaska Air Group |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Actual Allocations | 34.00% | 36.00%
Non-U.S. equity securities | Qualified Defined Benefit Plan - Salaried | Alaska Air Group |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Actual Allocations | 0.00% | 3.00%
Non-U.S. equity securities | Pension Plan | Alaska Air Group |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Actual Allocations | 13.00% | 15.00%
Fixed income securities | Qualified Defined Benefit Plan - Salaried | Alaska Air Group |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Actual Allocations | 100.00% | 90.00%
Fixed income securities | Qualified Defined Benefit Plan - Salaried | Hawaiian Holdings, Inc. |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target Allocations | 35.00% |
Actual Allocations | 44.00% |
Fixed income securities | Pension Plan | Alaska Air Group |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Actual Allocations | 50.00% | 45.00%
Real estate | Qualified Defined Benefit Plan - Salaried | Alaska Air Group |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Actual Allocations | 0.00% | 0.00%
Real estate | Qualified Defined Benefit Plan - Salaried | Hawaiian Holdings, Inc. |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target Allocations | 5.00% |
Actual Allocations | 4.00% |
Real estate | Pension Plan | Alaska Air Group |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Actual Allocations | 3.00% | 4.00%
Maximum | Domestic equity securities | Pension Plan | Alaska Air Group |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target Allocations | 44.00% |
Maximum | Non-U.S. equity securities | Pension Plan | Alaska Air Group |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target Allocations | 22.00% |
Maximum | Fixed income securities | Pension Plan | Alaska Air Group |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target Allocations | 85.00% |
Maximum | Real estate | Pension Plan | Alaska Air Group |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target Allocations | 10.00% |
Minimum | Domestic equity securities | Qualified Defined Benefit Plan - Salaried | Alaska Air Group |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target Allocations | 0.00% |
Minimum | Domestic equity securities | Pension Plan | Alaska Air Group |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target Allocations | 6.00% |
Minimum | Non-U.S. equity securities | Qualified Defined Benefit Plan - Salaried | Alaska Air Group |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target Allocations | 0.00% |
Minimum | Non-U.S. equity securities | Pension Plan | Alaska Air Group |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target Allocations | 0.00% |
Minimum | Fixed income securities | Qualified Defined Benefit Plan - Salaried | Alaska Air Group |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target Allocations | 100.00% |
Minimum | Fixed income securities | Pension Plan | Alaska Air Group |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target Allocations | 35.00% |
Minimum | Real estate | Qualified Defined Benefit Plan - Salaried | Alaska Air Group |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target Allocations | 0.00% |
Minimum | Real estate | Pension Plan | Alaska Air Group |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target Allocations | 0.00% |

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- Definition Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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