XML 57 R43.htm IDEA: XBRL DOCUMENT
v3.21.2

OPERATING SEGMENT INFORMATION (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | $ 1,953 | $ 701 | $ 4,277 | $ 2,758
Operating expenses |  |  |  |
Operating Expenses, Excluding Fuel | 1,319 | 1,147 | 2,778 | 3,370
Economic fuel | 376 | 125 | 853 | 568
Total Operating Expenses | 1,695 | 1,272 | 3,631 | 3,938
Nonoperating Income (Expense) |  |  |  |
Interest income | 6 | 7 | 19 | 23
Interest expense | (30) | (34) | (101) | (64)
Interest capitalized | 3 | 4 | 9 | 8
Other—net | 8 | 5 | 27 | 16
Nonoperating Income (Expense) | (13) | (18) | (46) | (17)
Costs and Expenses, Total | 1,695 | 1,272 | 3,631 | 3,938
Mileage Plan Revenue [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 310 | 148 | 760 | 538
Air Group Adjusted [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 1,953 | 701 | 4,277 | 2,758
Operating expenses |  |  |  |
Operating Expenses, Excluding Fuel | 1,328 | 1,101 | 3,699 | 3,453
Economic fuel | 376 | 128 | 921 | 568
Total Operating Expenses | 1,704 | 1,229 | 4,620 | 4,021
Nonoperating Income (Expense) |  |  |  |
Interest income | 6 | 7 | 19 | 23
Interest expense | (30) | (34) | (101) | (64)
Interest capitalized | 3 | 4 | 9 | 8
Other—net | 8 | 5 | 27 | 16
Nonoperating Income (Expense) | (13) | (18) | (46) | (17)
Income (loss) before income tax | 236 | (546) | (389) | (1,280)
Alaska Mainline [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 1,588 | 511 | 3,447 | 2,207
Operating expenses |  |  |  |
Operating Expenses, Excluding Fuel | 1,060 | 872 | 2,937 | 2,777
Economic fuel | 299 | 90 | 726 | 448
Total Operating Expenses | 1,359 | 962 | 3,663 | 3,225
Nonoperating Income (Expense) |  |  |  |
Interest income | 7 | 8 | 20 | 33
Interest expense | (25) | (28) | (86) | (58)
Interest capitalized | 2 | 4 | 8 | 8
Other—net | 8 | 4 | 27 | 16
Nonoperating Income (Expense) | (8) | (12) | (31) | (1)
Income (loss) before income tax | 221 | (463) | (247) | (1,019)
Alaska Regional [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 364 | 190 | 827 | 549
Operating expenses |  |  |  |
Operating Expenses, Excluding Fuel | 288 | 248 | 839 | 727
Economic fuel | 77 | 38 | 195 | 120
Total Operating Expenses | 365 | 286 | 1,034 | 847
Nonoperating Income (Expense) |  |  |  |
Interest income | 0 | 0 | 0 | 0
Interest expense | 0 | 0 | 0 | 0
Interest capitalized | 0 | 0 | 0 | 0
Other—net | 0 | 0 | 0 | 0
Nonoperating Income (Expense) | 0 | 0 | 0 | 0
Income (loss) before income tax | (1) | (96) | (207) | (298)
Horizon [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 107 | 95 | 322 | 281
Operating expenses |  |  |  |
Operating Expenses, Excluding Fuel | 93 | 78 | 272 | 238
Economic fuel | 0 | 0 | 0 | 0
Total Operating Expenses | 93 | 78 | 272 | 238
Nonoperating Income (Expense) |  |  |  |
Interest income | 0 | 0 | 0 | 0
Interest expense | (6) | (6) | (16) | (16)
Interest capitalized | 0 | 0 | 0 | 0
Other—net | 0 | 0 | 0 | 0
Nonoperating Income (Expense) | (6) | (6) | (16) | (16)
Income (loss) before income tax | 8 | 11 | 34 | 27
Consolidating and Other [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | (106) | (95) | (319) | (279)
Operating expenses |  |  |  |
Operating Expenses, Excluding Fuel | (113) | (97) | (349) | (289)
Economic fuel | 0 | 0 | 0 | 0
Total Operating Expenses | (113) | (97) | (349) | (289)
Nonoperating Income (Expense) |  |  |  |
Interest income | (1) | (1) | (1) | (10)
Interest expense | 1 | 0 | 1 | 10
Interest capitalized | 1 | 0 | 1 | 0
Other—net | 0 | 1 | 0 | 0
Nonoperating Income (Expense) | 1 | 0 | 1 | 0
Income (loss) before income tax | 8 | 2 | 31 | 10
Special Charges [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 0 | 0 | 0 | 0
Operating expenses |  |  |  |
Operating Expenses, Excluding Fuel | (9) | 46 | (921) | (83)
Economic fuel | 0 | (3) | (68) | 0
Total Operating Expenses | (9) | 43 | (989) | (83)
Nonoperating Income (Expense) |  |  |  |
Interest income | 0 | 0 | 0 | 0
Interest expense | 0 | 0 | 0 | 0
Interest capitalized | 0 | 0 | 0 | 0
Other—net | 0 | 0 | 0 | 0
Nonoperating Income (Expense) | 0 | 0 | 0 | 0
Income (loss) before income tax | 9 | (43) | 989 | 83
Passenger [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 1,774 | 572 | 3,785 | 2,362
Passenger [Member] | Air Group Adjusted [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 1,774 | 572 | 3,785 | 2,362
Passenger [Member] | Alaska Mainline [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 1,425 | 401 | 3,003 | 1,860
Passenger [Member] | Alaska Regional [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 349 | 171 | 782 | 502
Passenger [Member] | Horizon [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 0 | 0 | 0 | 0
Passenger [Member] | Consolidating and Other [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 0 | 0 | 0 | 0
Passenger [Member] | Special Charges [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 0 | 0 | 0 | 0
Capacity Purchase Agreements [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 0 | 0 | 0 | 0
Capacity Purchase Agreements [Member] | Air Group Adjusted [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 0 | 0 | 0 | 0
Capacity Purchase Agreements [Member] | Alaska Mainline [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 0 | 0 | 0 | 0
Capacity Purchase Agreements [Member] | Alaska Regional [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 0 | 0 | 0 | 0
Capacity Purchase Agreements [Member] | Horizon [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 107 | 95 | 322 | 281
Capacity Purchase Agreements [Member] | Consolidating and Other [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | (107) | (95) | (322) | (281)
Capacity Purchase Agreements [Member] | Special Charges [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 0 | 0 | 0 | 0
Mileage plan other revenue [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 120 | 84 | 332 | 266
Mileage plan other revenue [Member] | Mileage Plan Revenue [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 120 | 84 | 332 | 266
Mileage plan other revenue [Member] | Air Group Adjusted [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 120 | 84 | 332 | 266
Mileage plan other revenue [Member] | Alaska Mainline [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 105 | 65 | 287 | 219
Mileage plan other revenue [Member] | Alaska Regional [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 15 | 19 | 45 | 47
Mileage plan other revenue [Member] | Horizon [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 0 | 0 | 0 | 0
Mileage plan other revenue [Member] | Consolidating and Other [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 0 | 0 | 0 | 0
Mileage plan other revenue [Member] | Special Charges [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 0 | 0 | 0 | 0
Cargo and Freight [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 59 | 45 | 160 | 130
Cargo and Freight [Member] | Air Group Adjusted [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 59 | 45 | 160 | 130
Cargo and Freight [Member] | Alaska Mainline [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 58 | 45 | 157 | 128
Cargo and Freight [Member] | Alaska Regional [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 0 | 0 | 0 | 0
Cargo and Freight [Member] | Horizon [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 0 | 0 | 0 | 0
Cargo and Freight [Member] | Consolidating and Other [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 1 | 0 | 3 | 2
Cargo and Freight [Member] | Special Charges [Member] |  |  |  |
Operating Revenues |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | $ 0 | $ 0 | $ 0 | $ 0

X
- Definition Operating Expenses, Excluding Fuel + References No definition available. + Details
Name: | alk_OperatingExpensesExcludingFuel
Namespace Prefix: | alk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Total costs of sales and operating expenses for the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 + Details
Name: | us-gaap_CostsAndExpenses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Fuel costs incurred that are directly related to goods produced and sold and services rendered during the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a),(d)) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 + Details
Name: | us-gaap_FuelCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8906-108599 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8924-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599 + Details
Name: | us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of interest costs capitalized disclosed as an adjusting item to interest costs incurred. + References No definition available. + Details
Name: | us-gaap_InterestCostsCapitalizedAdjustment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Total interest costs incurred during the period and either capitalized or charged against earnings. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 + Details
Name: | us-gaap_InterestCostsIncurred
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7(b)) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599 + Details
Name: | us-gaap_InvestmentIncomeInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 + Details
Name: | us-gaap_NonoperatingIncomeExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense. + References No definition available. + Details
Name: | us-gaap_OperatingExpenses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Definition Amount of income (expense) related to nonoperating activities, classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.9) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 + Details
Name: | us-gaap_OtherNonoperatingIncomeExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9031-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9038-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130543-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9054-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130545-203045 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856 + Details
Name: | us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Details
Name: | us-gaap_ContractWithCustomerSalesChannelAxis=alk_MileagePlanRevenueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=alk_AirGroupAdjustedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=alk_AlaskaMainlineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=alk_AlaskaRegionalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=alk_HorizonMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=alk_ConsolidatingAndOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=alk_SpecialChargesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_PassengerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=alk_CapacityPurchaseAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=alk_MileagePlanServicesOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_CargoAndFreightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |