XML 57 R44.htm IDEA: XBRL DOCUMENT
v3.22.1

Revenue - Air Traffic Liability - Loyalty Program Rollforward (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Change in Contract With Customer, Liability [Roll Forward] |  |
Beginning balance | $ 4,789 | $ 4,447
Amounts deferred associated with points awarded | 736 | 466
Ending balance | 4,884 | 4,623
Passenger Customer |  |
Change in Contract With Customer, Liability [Roll Forward] |  |
Revenue recognized from points redeemed | (624) | (278)
Other |  |
Change in Contract With Customer, Liability [Roll Forward] |  |
Revenue recognized from points redeemed | $ (17) | $ (12)

X
- Definition Change in Contract With Customer, Liability + References No definition available. + Details
Name: | luv_ChangeInContractWithCustomerLiabilityRollForward
Namespace Prefix: | luv_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Contract With Customer Liability, Air Traffic Liability, Loyalty Program + References No definition available. + Details
Name: | luv_ContractWithCustomerLiabilityAirTrafficLiabilityLoyaltyProgram
Namespace Prefix: | luv_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contract With Customer Liability, Air Traffic Liability, Loyalty Program, Awarded Points + References No definition available. + Details
Name: | luv_ContractWithCustomerLiabilityAirTrafficLiabilityLoyaltyProgramAwardedPoints
Namespace Prefix: | luv_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Contract With Customer, Liability, Loyalty Program, Revenue Recognized + References No definition available. + Details
Name: | luv_ContractWithCustomerLiabilityLoyaltyProgramRevenueRecognized
Namespace Prefix: | luv_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | srt_MajorCustomersAxis=luv_PassengerCustomersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=us-gaap_OtherCustomerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |