LEASES (Details) (B717 [Member], USD $) In Millions, unless otherwise specified	0 Months Ended	12 Months Ended					84 Months Ended
	Sep. 30, 2012 Aircrafts	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2024
Capital Unit [Line Items]
Capital Leased Assets, Number of Units	2
Operating Lease, Number of Units	78
Owned Assets, Number of Units	8
Total Assets Available for Lease/Sublease, Number of Units	88
Lessee	Delta Air Lines, Inc.
Estimated Loss On Sublease	$ 137
Lease Terms For Owned Aircraft	7 years
Contingent Termination Penalties	106
Future Expected Sublease Income from Operating Leases		$ 106	$ 106	$ 88	$ 48	$ 5	$ 345
Maximum [Member]
Capital Unit [Line Items]
Sublease Terms for Leased Aircraft	12 years
Minimum [Member]
Capital Unit [Line Items]
Sublease Terms for Leased Aircraft	6 years