BASIS OF PRESENTATION (Details) $ / shares in Units, shares in Millions, $ in Millions		6 Months Ended
	May. 14, 2014 USD ($) shares	Jun. 30, 2015 USD ($) item $ / shares shares	Dec. 31, 2014 $ / shares	May. 13, 2014 $ / shares
Basis of Presentation
Common stock, par value (in dollars per share) | $ / shares		$ 2.5	$ 2.5
Interest rate (as a percent)		6.50%
Non-cash consideration received from sale of AerCap | $		$ 500
International Lease Finance Corporation (ILFC)
Basis of Presentation
Percentage of common stock agreed to be sold	100.00%
Consideration in cash | $	$ 7,600
Number of shares received	97.6
Aer Cap
Basis of Presentation
Closing price per share (in dollars per share) | $ / shares				$ 47.01
Equity Method Investment, Number of shares sold		86.9
Number of shares remaining		10.7
Cash Proceeds from Sales of AerCap | $		$ 3,700
Bonds available for sale, maturity year		2045
Aer Cap | CallOptionMember
Basis of Presentation
Bonds available for sale, maturity year		2025
Aer Cap | Private Placement
Basis of Presentation
Equity Method Investment, Number of shares sold		15.7
Cash Proceeds from Sales of AerCap | $		$ 250
Aer Cap | Underwritten public offering
Basis of Presentation
Equity Method Investment, Number of shares sold		71.2
Cash Proceeds from Sales of AerCap | $		$ 3,400
Minimum
Basis of Presentation
Number of Countries in which the entity operates | item		100