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Intangible Assets, net
 12 Months Ended
Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets, net Intangible Assets, net
The following table summarizes the Company’s intangible assets, net (in millions):
December 31,
20212020
Amortization
Period		Gross
Carrying
Amount		Accumulated
Amortization		Net Carrying AmountGross
Carrying
Amount		Accumulated
Amortization		Net Carrying Amount
Indefinite-lived:
Airport slotsIndefinite$20 $— $20 $20 $— $20 
TrademarksIndefinite6 — 6 6 — 6 
26 — 26 26 — 26 
Finite-lived:
Affinity credit card program(1)
16 years16 (13)3 16 (13)3 
Total intangible assets, net$42 $(13)$29 $42 $(13)$29 
_____________
(1) During September of 2020, the Company extended the term of the underlying agreement for its affinity credit card program (refer to Note 9). As a result, the Company extended the amortization period for its respective intangible asset from 10 years to 16 years on a prospective basis.
Expected future amortization expense of the Company’s finite-lived intangible asset is less than $1 million per year from 2022 through 2029.