XML 55 R43.htm IDEA: XBRL DOCUMENT
v3.19.2

COMMITMENTS (Details) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2019 USD ($) aircraft
B-737 [Member] |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Committed to Purchase (in Aircraft) | aircraft | 32
Options to Purchase Additional (in Aircraft) | aircraft | 37
A320neo [Member] |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Unrecorded Unconditional Purchase Obligation, Option to Cancel | aircraft | 30
E175 [Member] |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Committed to Purchase (in Aircraft) | aircraft | 5
Options to Purchase Additional (in Aircraft) | aircraft | 30
Property Subject to Operating Lease [Member] | B-737 [Member] |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Property Subject to or Available for Operating Lease, Number of Units | aircraft | 10
Property Subject to Operating Lease [Member] | Airbus [Member] |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Property Subject to or Available for Operating Lease, Number of Units | aircraft | 62
Property Subject to Operating Lease [Member] | Q400 [Member] |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Property Subject to or Available for Operating Lease, Number of Units | aircraft | 9
Property Subject to Operating Lease [Member] | E175 [Member] |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Property Subject to or Available for Operating Lease, Number of Units | aircraft | 32
Property Available for Operating Lease [Member] | Airbus [Member] |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Property Subject to or Available for Operating Lease, Number of Optional Additional Units | aircraft | 1
Property Available for Operating Lease [Member] | E175 [Member] |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Property Subject to or Available for Operating Lease, Number of Optional Additional Units | aircraft | 3
Capacity Purchase Agreement with SkyWest [Member] | E175 [Member] |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Property Subject to or Available for Operating Lease, Number of Optional Additional Units | aircraft | 8
Aircraft Maintenance Deposits [Member] |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Remainder of 2018 | $ 33
2019 | 73
2020 | 62
2021 | 51
2022 | 27
Thereafter | 9
Total | 255
Aircraft Commitments [Member] |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Remainder of 2018 | 255
2019 | 542
2020 | 553
2021 | 303
2022 | 103
Thereafter | 32
Total | 1,788
Capacity Purchase Agreements [Member] |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Remainder of 2018 | 69
2019 | 145
2020 | 166
2021 | 174
2022 | 179
Thereafter | 1,065
Total | 1,798
Virgin America Flight Attendants [Member] |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Loss Contingency, Damages Sought, Value | $ 78

X
- Definition Property Subject to or Available for Operating Lease, Number of Optional Additional Units + References No definition available. + Details
Name: | alk_PropertySubjecttoorAvailableforOperatingLeaseNumberofOptionalAdditionalUnits
Namespace Prefix: | alk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Unrecorded Unconditional Purchase Obligation, Option to Cancel + References No definition available. + Details
Name: | alk_UnrecordedUnconditionalPurchaseObligationOptiontoCancel
Namespace Prefix: | alk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Unrecorded Unconditional Purchase Obligation, Option to Purchase Additional + References No definition available. + Details
Name: | alk_UnrecordedUnconditionalPurchaseObligationOptiontoPurchaseAdditional
Namespace Prefix: | alk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The value (monetary amount) of the award the plaintiff seeks in the legal matter. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14557-108349 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 + Details
Name: | us-gaap_LossContingencyDamagesSoughtValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The number of units (items of property) under operating lease arrangements. + References No definition available. + Details
Name: | us-gaap_PropertySubjectToOrAvailableForOperatingLeaseNumberOfUnits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

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

X
- Definition Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77896938&loc=d3e25336-109308 + Details
Name: | us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77896938&loc=d3e25336-109308 + Details
Name: | us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77896938&loc=d3e25336-109308 + Details
Name: | us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77896938&loc=d3e25336-109308 + Details
Name: | us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77896938&loc=d3e25336-109308 + Details
Name: | us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77896938&loc=d3e25336-109308 + Details
Name: | us-gaap_UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the remainder of the fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
Name: | us-gaap_UnrecordedUnconditionalPurchaseObligationDueInRemainderOfFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The minimum number of units that must be purchased, in connection with an unconditional purchase obligation that has not been recognized for financial reporting purposes. + References No definition available. + Details
Name: | us-gaap_UnrecordedUnconditionalPurchaseObligationMinimumQuantityRequired
Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | srt_AircraftTypeAxis=srt_B737Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_AircraftTypeAxis=srt_A320NeoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_AircraftTypeAxis=alk_E175Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis=us-gaap_PropertySubjectToOperatingLeaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_AircraftTypeAxis=alk_AirbusMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_AircraftTypeAxis=alk_Q400Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis=us-gaap_PropertyAvailableForOperatingLeaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LeaseArrangementTypeAxis=alk_CapacityPurchaseAgreementwithSkyWestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_OtherCommitmentsAxis=alk_AircraftMaintenanceDepositsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis=us-gaap_CapitalAdditionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis=us-gaap_CapacityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=alk_VirginAmericaFlightAttendantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |