XML 41 R28.htm IDEA: XBRL DOCUMENT
v3.22.1

WORLDWIDE PANDEMIC - Narrative (Details) $ / shares in Units, $ in Millions |  |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | ---
Mar. 31, 2022 USD ($) aircraft employee $ / shares | Jun. 01, 2020 employee | Mar. 31, 2022 USD ($) employee aircraft $ / shares | Mar. 31, 2021 USD ($) | Jun. 30, 2021 USD ($)
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Employees who elected conversion in extended emergency time off | employee |  |  | 0 |  |
COVID - 19 |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Voluntary separation program 2020 participants | employee | 4,200 |  | 4,200 |  |
Number of employees who participated in extended emergency time off during 2020 | employee |  | 12,000 |  |  |
Extended emergency time off accrual for employees who accepted through 2020 | $ | $ 296 |  | $ 32 |  | $ 1,400
Extended emergency time off reversal for employees who accepted through March 31, 2021 | $ |  |  | $ 115 |  |
Aircrafts in long-term storage | aircraft | 4 |  | 4 |  |
Proceeds from PSP2 payroll support program | $ |  |  |  | $ 1,200 |
COVID - 19 | Minimum |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Extended emergency time off, period |  | 6 months |  |  |
COVID - 19 | Maximum |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Extended emergency time off, period |  | 18 months |  |  |
COVID - 19 | Maximum | Pilots |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Extended emergency time off, period |  | 5 years |  |  |
United States Department of Treasury | PSP1 |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Strike price (in USD per share) | $ / shares | $ 36.47 |  | $ 36.47 |  |
United States Department of Treasury | PSP2 |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Strike price (in USD per share) | $ / shares | 46.28 |  | $ 46.28 |  |
Expiration period (in years) |  |  | 5 years |  |
United States Department of Treasury | PSP3 |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Strike price (in USD per share) | $ / shares | $ 58.51 |  | $ 58.51 |  |
Expiration period (in years) |  |  | 5 years |  |

X
- Definition Class Of Warrant Or Right, Expiration Period + References No definition available. + Details
Name: | luv_ClassOfWarrantOrRightExpirationPeriod
Namespace Prefix: | luv_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Employees who Elected Conversion In Extended Emergency Time Off + References No definition available. + Details
Name: | luv_EmployeesWhoElectedConversionInExtendedEmergencyTimeOff
Namespace Prefix: | luv_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Employees who participated in Extended Emergency Time Off During 2020 + References No definition available. + Details
Name: | luv_EmployeesWhoParticipatedInExtendedEmergencyTimeOffDuring2020
Namespace Prefix: | luv_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Extended Emergency Time Off Accrual for Employees who Accepted through 2020 + References No definition available. + Details
Name: | luv_ExtendedEmergencyTimeOffAccrualForEmployeesWhoAcceptedThrough2020
Namespace Prefix: | luv_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Extended Emergency Time Off Period + References No definition available. + Details
Name: | luv_ExtendedEmergencyTimeOffPeriod
Namespace Prefix: | luv_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Extended Emergency Time Off Reversal for Employees who Accepted through March 31, 2021 + References No definition available. + Details
Name: | luv_ExtendedEmergencyTimeOffReversalForEmployeesWhoAcceptedThroughMarch312021
Namespace Prefix: | luv_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Number of Aircraft in Long-Term Storage + References No definition available. + Details
Name: | luv_NumberOfAircraftInLongTermStorage
Namespace Prefix: | luv_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Proceeds from PSP2 Payroll Support Program Extension Grant Allocated to Fund Salaries, Wages, and Benefits + References No definition available. + Details
Name: | luv_ProceedsFromPSP2PayrollSupportProgramExtensionGrantAllocatedToFundSalariesWagesAndBenefits
Namespace Prefix: | luv_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Voluntary Separation Program 2020 Participants + References No definition available. + Details
Name: | luv_VoluntarySeparationProgram2020Participants
Namespace Prefix: | luv_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21475-112644 + Details
Name: | us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
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: | us-gaap_UnusualOrInfrequentItemAxis=luv_COVID19Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | luv_WorkgroupAxis=luv_PilotsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=luv_UnitedStatesDepartmentOfTreasuryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_UnusualOrInfrequentItemAxis=luv_CoronavirusAidReliefAndEconomicSecurityActMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_UnusualOrInfrequentItemAxis=luv_ConsolidatedAppropriationsAct2021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_UnusualOrInfrequentItemAxis=luv_AmericanRescuePlanActOf2021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |