XML 280 R71.htm IDEA: XBRL DOCUMENT
v3.24.0.1

FINANCIAL DERIVATIVE INSTRUMENTS - Fuel Hedging (Details) gal in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 gal
2024 |
Volume of Fuel Hedging |
Fuel Hedged (in gallons) | 1,265
2025 |
Volume of Fuel Hedging |
Fuel Hedged (in gallons) | 1,033
2026 |
Volume of Fuel Hedging |
Fuel Hedged (in gallons) | 358

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: | luv_VolumeOfFuelHedgingLineItems
Namespace Prefix: | luv_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Nominal volume used to calculate payments on a derivative instrument. + References No definition available. + Details
Name: | us-gaap_DerivativeNonmonetaryNotionalAmountVolume
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:volumeItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=luv_DerivativeUnderlyingCommodityTypeAsOf2024Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=luv_DerivativeUnderlyingCommodityTypeAsOf2025Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=luv_DerivativeUnderlyingCommodityTypeAsOf2026Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |