XML 95 R79.htm IDEA: XBRL DOCUMENT
v3.6.0.2

OPERATING SEGMENT INFORMATION (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Operating revenues |  |  |  |  |  |
Passenger, Mainline |  | $ 4,098 | $ 3,939 |  | $ 3,774 |
Passenger, Regional |  | 908 | 854 |  | 805 |
Total passenger revenue |  | 5,006 | 4,793 |  | 4,579 |
CPA revenues |  | 0 | 0 |  | 0 |
Freight and mail |  | 108 | 108 |  | 114 |
Other Net and Special Revenue |  | 817 | 697 |  | 675 |
Total Operating Revenues |  | 5,931 | 5,598 |  | 5,368 |
Operating expenses |  |  |  |  |  |
Operating expenses, excluding fuel |  | 3,751 | 3,346 |  | 2,988 |
Special items—merger-related costs and other |  | 117 | 32 |  | (30) |
Economic fuel |  | 831 | 954 |  | 1,418 |
Total Operating Expenses |  | 4,582 | 4,300 |  | 4,406 |
Nonoperating Income (Expense) |  |  |  |  |  |
Interest income |  | 27 | 21 |  | 21 |
Interest expense |  | (55) | (42) |  | (48) |
Other |  | 24 | 35 |  | 40 |
Nonoperating Income (Expense) Total |  | (4) | 14 |  | 13 |
Income (loss) before income tax |  | 1,345 | 1,312 |  | 975 |
Depreciation |  | 363 | 320 |  | 294 |
Capital expenditures |  | 678 | 831 |  | 694 |
Total assets |  | 9,962 | 6,530 |  |  |
Air Group Adjusted [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Passenger, Mainline | [1] | 4,098 | 3,939 |  | 3,774 |
Passenger, Regional | [1] | 908 | 854 |  | 805 |
Total passenger revenue | [1] | 5,006 | 4,793 |  | 4,579 |
CPA revenues | [1] | 0 | 0 |  | 0 |
Freight and mail | [1] | 108 | 108 |  | 114 |
Other Net and Special Revenue | [1] | 817 | 697 |  | 675 |
Total Operating Revenues | [1] | 5,931 | 5,598 |  | 5,368 |
Operating expenses |  |  |  |  |  |
Operating expenses, excluding fuel | [1] | 3,634 | 3,314 |  | 3,018 |
Economic fuel | [1] | 844 | 954 |  | 1,441 |
Total Operating Expenses | [1] | 4,478 | 4,268 |  | 4,459 |
Nonoperating Income (Expense) |  |  |  |  |  |
Interest income | [1] | 27 | 21 |  | 21 |
Interest expense | [1] | (55) | (42) |  | (48) |
Other | [1] | 24 | 35 |  | 40 |
Nonoperating Income (Expense) Total | [1] | (4) | 14 |  | 13 |
Income (loss) before income tax | [1] | 1,449 | 1,344 |  | 922 |
Alaska Airlines [Member] |  |  |  |  |  |
Nonoperating Income (Expense) |  |  |  |  |  |
Depreciation | [2] | 296 | 268 |  | 243 |
Capital expenditures | [2] | 608 | 821 |  | 659 |
Total assets | [2] | 15,260 | 8,127 |  |  |
Alaska Mainline [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Passenger, Mainline |  | 4,098 | 3,939 |  | 3,774 |
Passenger, Regional |  | 0 | 0 |  | 0 |
Total passenger revenue |  | 4,098 | 3,939 |  | 3,774 |
CPA revenues |  | 0 | 0 |  | 0 |
Freight and mail |  | 104 | 103 |  | 109 |
Other Net and Special Revenue |  | 738 | 621 |  | 592 |
Total Operating Revenues |  | 4,940 | 4,663 |  | 4,475 |
Operating expenses |  |  |  |  |  |
Operating expenses, excluding fuel |  | 2,883 | 2,653 |  | 2,417 |
Economic fuel |  | 719 | 823 |  | 1,251 |
Total Operating Expenses |  | 3,602 | 3,476 |  | 3,668 |
Nonoperating Income (Expense) |  |  |  |  |  |
Interest income |  | 26 | 19 |  | 20 |
Interest expense |  | (42) | (28) |  | (32) |
Other |  | 19 | 28 |  | 39 |
Nonoperating Income (Expense) Total |  | 3 | 19 |  | 27 |
Income (loss) before income tax |  | 1,341 | 1,206 |  | 834 |
Alaska Regional [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Passenger, Mainline |  | 0 | 0 |  | 0 |
Passenger, Regional |  | 908 | 854 |  | 805 |
Total passenger revenue |  | 908 | 854 |  | 805 |
CPA revenues |  | 0 | 0 |  | 0 |
Freight and mail |  | 5 | 5 |  | 5 |
Other Net and Special Revenue |  | 74 | 72 |  | 78 |
Total Operating Revenues |  | 987 | 931 |  | 888 |
Operating expenses |  |  |  |  |  |
Operating expenses, excluding fuel |  | 769 | 695 |  | 623 |
Economic fuel |  | 125 | 131 |  | 190 |
Total Operating Expenses |  | 894 | 826 |  | 813 |
Nonoperating Income (Expense) |  |  |  |  |  |
Interest income |  | 0 | 0 |  | 0 |
Interest expense |  | 0 | 0 |  | 0 |
Other |  | 0 | 0 |  | (1) |
Nonoperating Income (Expense) Total |  | 0 | 0 |  | (1) |
Income (loss) before income tax |  | 93 | 105 |  | 74 |
Horizon [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Passenger, Mainline |  | 0 | 0 |  | 0 |
Passenger, Regional |  | 0 | 0 |  | 0 |
Total passenger revenue |  | 0 | 0 |  | 0 |
CPA revenues |  | 424 | 408 |  | 371 |
Freight and mail |  | 0 | 0 |  | 0 |
Other Net and Special Revenue |  | 4 | 4 |  | 5 |
Total Operating Revenues |  | 428 | 412 |  | 376 |
Operating expenses |  |  |  |  |  |
Operating expenses, excluding fuel |  | 407 | 375 |  | 349 |
Economic fuel |  | 0 | 0 |  | 0 |
Total Operating Expenses |  | 407 | 375 |  | 349 |
Nonoperating Income (Expense) |  |  |  |  |  |
Interest income |  | 1 | 0 |  | 0 |
Interest expense |  | (9) | (10) |  | (12) |
Other |  | 1 | 1 |  | 2 |
Nonoperating Income (Expense) Total |  | (7) | (9) |  | (10) |
Income (loss) before income tax |  | 14 | 28 |  | 17 |
Depreciation |  | 67 | 52 |  | 51 |
Capital expenditures |  | 70 | 10 |  | 35 |
Total assets |  | 690 | 717 |  |  |
Parent [Member] |  |  |  |  |  |
Nonoperating Income (Expense) |  |  |  |  |  |
Total assets |  | (5,988) | (2,314) |  |  |
Intersegment Eliminations |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Passenger, Mainline |  | 0 | 0 |  | 0 |
Passenger, Regional |  | 0 | 0 |  | 0 |
Total passenger revenue |  | 0 | 0 |  | 0 |
CPA revenues |  | (424) | (408) |  | (371) |
Freight and mail |  | (1) | 0 |  | 0 |
Other Net and Special Revenue |  | 1 | 0 |  | 0 |
Total Operating Revenues |  | (424) | (408) |  | (371) |
Operating expenses |  |  |  |  |  |
Operating expenses, excluding fuel |  | (425) | (409) |  | (371) |
Economic fuel |  | 0 | 0 |  | 0 |
Total Operating Expenses |  | (425) | (409) |  | (371) |
Nonoperating Income (Expense) |  |  |  |  |  |
Interest income |  | 0 | 2 |  | 1 |
Interest expense |  | (4) | (4) |  | (4) |
Other |  | 4 | 6 |  | 0 |
Nonoperating Income (Expense) Total |  | 0 | 4 |  | (3) |
Income (loss) before income tax |  | 1 | 5 |  | (3) |
Special Charges [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Passenger, Mainline | [3] | 0 | 0 |  | 0 |
Passenger, Regional | [3] | 0 | 0 |  | 0 |
Total passenger revenue | [3] | 0 | 0 |  | 0 |
CPA revenues | [3] | 0 | 0 |  | 0 |
Freight and mail | [3] | 0 | 0 |  | 0 |
Other Net and Special Revenue | [3] | 0 | 0 |  | 0 |
Total Operating Revenues | [3] | 0 | 0 |  | 0 |
Operating expenses |  |  |  |  |  |
Operating expenses, excluding fuel |  | 117 | 32 | [3] | (30) | [3]
Economic fuel |  | (13) | 0 | [3] | (23) | [3]
Total Operating Expenses | [3] | 104 | 32 |  | (53) |
Nonoperating Income (Expense) |  |  |  |  |  |
Interest income | [3] | 0 | 0 |  | 0 |
Interest expense | [3] | 0 | 0 |  | 0 |
Other | [3] | 0 | 0 |  | 0 |
Nonoperating Income (Expense) Total | [3] | 0 | 0 |  | 0 |
Income (loss) before income tax | [3] | $ (104) | $ (32) |  | $ 53 |
[1] | Year Ended December 31, 2014Mainline Regional Horizon Consolidating & Other(b) Air Group Adjusted(c) Special Items(d) ConsolidatedOperating revenues Passenger Mainline$3,774 $— $— $— $3,774 $— $3,774Regional— 805 — — 805 — 805Total passenger revenues3,774 805 — — 4,579 — 4,579CPA revenues— — 371 (371) — — —Freight and mail109 5 — — 114 — 114Other-net592 78 5 — 675 — 675Total operating revenues4,475 888 376 (371) 5,368 — 5,368 Operating expenses Operating expenses, excluding fuel2,417 623 349 (371) 3,018 (30) 2,988Fuel expense1,251 190 — — 1,441 (23) 1,418Total operating expenses3,668 813 349 (371) 4,459 (53) 4,406 Nonoperating income (expense) Interest income20 — — 1 21 — 21Interest expense(32) — (12) (4) (48) — (48)Other39 (1) 2 — 40 — 40 27 (1) (10) (3) 13 — 13Income (loss) before income tax$834 $74 $17 $(3) $922 $53 $975
[2] | 2016 2015 2014Depreciation and amortization: Mainline$296 $268 $243Horizon67 52 51Consolidated$363 $320 $294 Capital expenditures: Mainline$608 $821 $659Horizon70 10 35Consolidated$678 $831 $694 Total assets at end of period: Mainline$15,260 $8,127 Horizon690 717 Consolidating & Other(5,988) (2,314) Consolidated$9,962 $6,530
[3] | {F|ahBzfndlYmZpbGluZ3MtaHJkcmoLEgZYTUxEb2MiXlhCUkxEb2NHZW5JbmZvOjcwOTdhOTM1ODYyYTRmZDE4YWRlNzJjOWQ0M2Q0NzUyfFRleHRTZWxlY3Rpb246NjdDN0U5MTdDNkRFMEZFNjQ2OEEyQzQ3MzZDRDc3MTUM}

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 Other Net and Special Revenue + References No definition available. + Details
Name: | alk_OtherNetandSpecialRevenue
Namespace Prefix: | alk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Other Nonoperating Income Expense Other + References No definition available. + Details
Name: | alk_OtherNonoperatingIncomeExpenseOther
Namespace Prefix: | alk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(12)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(11)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_Assets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=73531572&loc=d3e1043-128460 + Details
Name: | us-gaap_BusinessCombinationAcquisitionRelatedCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Revenue from transporting cargo and freight between locations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(d)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_CargoAndFreightRevenue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
Name: | us-gaap_DepreciationDepletionAndAmortization
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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a),(d)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + 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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of the cost of borrowed funds accounted for as interest expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.9) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
Name: | us-gaap_InterestExpense
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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7(b)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + 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 A transportation (plane, train, ship) carrier's fare revenue recognized in the period from carrying passengers between destinations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(d)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_PassengerRevenue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of a transportation carrier's mainline fare revenue recognized in the period from carrying passengers between destinations. + References No definition available. + Details
Name: | us-gaap_PassengerRevenueMainline
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of a transportation carrier's regional affiliates' fare revenue recognized in the period from carrying passengers between destinations. + References No definition available. + Details
Name: | us-gaap_PassengerRevenueRegional
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_Revenues
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
- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_SalesRevenueNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

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

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=us-gaap_IntersegmentEliminationMember
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: |