XML 162 R78.htm IDEA: XBRL DOCUMENT v3.22.4
Leases and Capacity Purchase Agreements - Components of Lease Cost (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Leases [Abstract]      
Operating lease cost $ 941 $ 958 $ 933
Variable and short-term lease cost 2,603 2,291 1,968
Amortization of finance lease assets 72 89 88
Interest on finance lease liabilities 13 16 16
Sublease income (33) (26) (23)
Total lease cost $ 3,596 $ 3,328 $ 2,982