Quarterly report pursuant to Section 13 or 15(d)

LEASES - Narratives (Details)

v3.21.2
LEASES - Narratives (Details)
$ in Millions
3 Months Ended
Jun. 30, 2021
USD ($)
aircraft
Lessee, Lease, Description [Line Items]  
Number of lease aircrafts (aircraft) 316
Number of lease aircrafts, finance (aircraft) 22
Number of lease aircrafts, operating (aircraft) 18
Number of lease aircrafts, short-term (aircraft) 276
Lessee, Finance Lease and Operating Lease, Lease Not Yet Commenced, Amount | $ $ 175
Minimum  
Lessee, Lease, Description [Line Items]  
Remaining lease term 1 month
Maximum  
Lessee, Lease, Description [Line Items]  
Remaining lease term 139 years