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Fair Value (Tables)
9 Months Ended
Sep. 30, 2022
Fair Value Disclosures [Abstract]  
Fair value, by balance sheet grouping
The following is a listing of our assets and liabilities required to be measured at fair value on a recurring basis and where they are classified within the fair value hierarchy as of September 30, 2022 and December 31, 2021 (in millions):
September 30, 2022
Level 1Level 2Level 3Total
Assets
Cash equivalents$1,004 $— $— $1,004 
Available-for-sale investment securities— 680 — 680 
Equity investment securities11 — — 11 
Aircraft fuel derivatives— — 
December 31, 2021
Level 1Level 2Level 3Total
Assets
Cash equivalents$1,515 $— $— $1,515 
Available-for-sale investment securities— 800 — 800 
Equity investment securities26 — — 26 
Aircraft fuel derivatives— — — —