Annual report pursuant to Section 13 and 15(d)

LEASES - Narratives (Details)

v3.22.0.1
LEASES - Narratives (Details)
$ in Millions
12 Months Ended
Dec. 31, 2021
USD ($)
aircraft
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Lessee, Lease, Description [Line Items]      
Number of lease aircrafts (aircraft) 329    
Number of lease aircrafts, finance (aircraft) 22    
Number of lease aircrafts, operating (aircraft) 18    
Number of lease aircrafts, short-term (aircraft) 289    
Impairment charges for ROU assets | $ $ 0 $ 17 $ 0
Finance Lease, Impairment Loss | $ 0   $ 0
Lessee, Finance Lease and Operating Lease, Lease Not Yet Commenced, Amount | $ $ 348    
Minimum      
Lessee, Lease, Description [Line Items]      
Lessee, Lease Term 1 month    
Maximum      
Lessee, Lease, Description [Line Items]      
Lessee, Lease Term 139 years