Supplemental Financial Information (Tables)

9 Months Ended

Sep. 30, 2013

Table Text Block [Abstract]

Other Assets

	September 30,		December 31,
(in millions)	2013		2012
Fuel derivative contracts	$	58	$	221
Interest rate derivative contracts	22		31
Receivable from third parties for fuel contracts - noncurrent	14		54
Intangible assets	123		138
Non-current investments	44		41
Other	157		148
Other assets	$	418	$	633

Accrued Liabilities

	September 30,		December 31,
(in millions)	2013		2012
Retirement plans	$	173	$	135
Aircraft rentals	171		139
Vacation pay	286		270
Health	62		70
Fuel derivative contracts	3		50
Workers compensation	158		159
Accrued taxes	116		67
Other	203		212
Accrued liabilities	$	1,172	$	1,102

Other Noncurrent Liabilities

	September 30,		December 31,
(in millions)	2013		2012
Postretirement obligation	$	169	$	148
Non-current lease-related obligations	312		376
Airport construction obligation	420		331
Other deferred compensation	153		141
Fuel derivative contracts	18		—
Interest rate derivative contracts	54		37
Other	72		91
Other non-current liabilities	$	1,198	$	1,124