LEASES Sublease Table (Details) - B-717-200 - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
B717 Sublease Liability [Line Items]
Sublease Obligations		$ 18	$ 63	$ 122
Interest Expense, Accretion		1	5
Sublease Transaction Costs	[1]	(48)	(86)
Additional Estimated Loss on Sublease		$ 2	$ 22

[1] Includes lease conversion cost payments