XML 79 R61.htm IDEA: XBRL DOCUMENT
v3.21.2

BOEING 737 MAX AIRCRAFT GROUNDING (Details) $ in Millions | Jun. 30, 2021 aircraft | Jan. 31, 2020 USD ($) | Dec. 31, 2019 aircraft | Jul. 31, 2019 USD ($) | Mar. 13, 2019 aircraft
--- | --- | --- | --- | --- | ---
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Aircrafts grounded under emergency order |  |  |  |  | 34
After-tax charge for potential concessions and other considerations to customers for disruptions related to the 737 MAX grounding | $ |  |  |  | $ 4,900 |
Pre-tax charge related to estimated potential concessions and other considerations to customers related to the 737 MAX grounding | $ |  | $ 2,600 |  |  |
Aircrafts not delivered |  |  | 41 |  |
B-737-Max |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Number of 737 MAX owned | 31 |  |  |  |
Contract to Own Aircraft |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Aircrafts not delivered |  |  | 28 |  |
Contract to Lease Aircraft |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Aircrafts not delivered |  |  | 13 |  |

X
- Definition After-Tax Potential Concessions and Other Considerations Announced July 2019 + References No definition available. + Details
Name: | luv_AfterTaxPotentialConcessionsandOtherConsiderationsAnnouncedJuly2019
Namespace Prefix: | luv_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Number Of Aircraft Grounded Under Emergency Order + References No definition available. + Details
Name: | luv_NumberOfAircraftGroundedUnderEmergencyOrder
Namespace Prefix: | luv_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number Of Aircraft Not Delivered Due to Grounding Under Emergency Order + References No definition available. + Details
Name: | luv_NumberOfAircraftNotDeliveredDueToGroundingUnderEmergencyOrder
Namespace Prefix: | luv_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of units (items of property) owned. + References No definition available. + Details
Name: | luv_OwnedAssetsNumberOfUnits
Namespace Prefix: | luv_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Pre-Tax Potential Concessions and Other Considerations Announced January 2020 + References No definition available. + Details
Name: | luv_PreTaxPotentialConcessionsandOtherConsiderationsAnnouncedJanuary2020
Namespace Prefix: | luv_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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
Name: | us-gaap_UnusualOrInfrequentItemLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_AircraftTypeAxis=srt_B737MaxMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | luv_AssetDispositionAxis=luv_ContracttoOwnAircraftMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | luv_AssetDispositionAxis=luv_ContracttoLeaseAircraftMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |