Derivatives and Risk Management (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Effective Portion Reclassified from AOCI to Earnings	$ (135)	$ 15	$ (172)
Gains (Losses) recorded in aircraft fuel and related taxes	(114)	(209)	135
Fuel Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Effective Portion Reclassified from AOCI to Earnings	0	(15)	(233)
Gains (Losses) recorded in aircraft fuel and related taxes	(493)	66	(420)
Airline [Member] | Fuel Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains (Losses) recorded in aircraft fuel and related taxes	(444)	81	(187)
Refinery [Member] | Fuel Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains (Losses) recorded in aircraft fuel and related taxes	$ (49)	$ 0	$ 0