XML 47 R29.htm IDEA: XBRL DOCUMENT v3.25.1

Financial Derivative Instruments - Fuel Hedging (Details) gal in Millions	3 Months Ended
	Mar. 31, 2025 gal
Remainder of 2025
Volume of Fuel Hedging
Fuel Hedged (in gallons)	775
2026
Volume of Fuel Hedging
Fuel Hedged (in gallons)	945
2027
Volume of Fuel Hedging
Fuel Hedged (in gallons)	277

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_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems
Namespace Prefix:	us-gaap_
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_DerivativeInstrumentCurrentYearMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=luv_DerivativeInstrumentNextYearMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=luv_DerivativeInstrumentYearTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: