OPERATING SEGMENT INFORMATION (TABLES)

12 Months Ended

Dec. 31, 2014

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

Operating segment information is as follows (in millions):

	Alaska
Year Ended December 31, 2014	Mainline			Regional			Horizon			Consolidating			Air Group Adjusted(a)			Special Items(b)			Consolidated
Operating revenues
Passenger
Mainline	$	3,774		$	—		$	—		$	—		$	3,774		$	—		$	3,774
Regional	—			805			—			—			805			—			805
Total passenger revenues	3,774			805			—			—			4,579			—			4,579
CPA revenues	—			—			371			(371		)	—			—			—
Freight and mail	109			5			—						114			—			114
Other-net	592			78			5						675						675
Total operating revenues	4,475			888			376			(371		)	5,368			—			5,368
Operating expenses
Operating expenses, excluding fuel	2,417			623			349			(371		)	3,018			(30		)	2,988
Economic fuel	1,251			190			—			—			1,441			(23		)	1,418
Total operating expenses	3,668			813			349			(371		)	4,459			(53		)	4,406
Nonoperating income (expense)
Interest income	20			—			—			1			21			—			21
Interest expense	(32		)	—			(12		)	(4		)	(48		)	—			(48		)
Other	39			(1		)	2			—			40			—			40
	27			(1		)	(10		)	(3		)	13			—			13
Income (loss) before income tax	$	834		$	74		$	17		$	(3	)	$	922		$	53		$	975

	Alaska
Year Ended December 31, 2013	Mainline			Regional			Horizon			Consolidating			Air Group Adjusted(a)			Special Items(b)			Consolidated
Operating revenues
Passenger
Mainline	$	3,490		$	—		$	—		$	—		$	3,490		$	—		$	3,490
Regional	—			777			—			—			777			—			777
Total passenger revenues	3,490			777			—			—			4,267			—			4,267
CPA revenues	—			—			368			(368		)	—			—			—
Freight and mail	109			4			—						113			—			113
Other-net	513			66			5						584			192			776
Total operating revenues	4,112			847			373			(368		)	4,964			192			5,156
Operating expenses
Operating expenses, excluding fuel	2,293			585			341			(368		)	2,851			—			2,851
Economic fuel	1,294			181			—			—			1,475			(8		)	1,467
Total operating expenses	3,587			766			341			(368		)	4,326			(8		)	4,318
Nonoperating income (expense)
Interest income	18			—			—			—			18			—			18
Interest expense	(38		)	—			(14		)	(4		)	(56		)	—			(56		)
Other	25			(12		)	2			1			16			—			16
	5			(12		)	(12		)	(3		)	(22		)	—			(22		)
Income (loss) before income tax	$	530		$	69		$	20		$	(3	)	$	616		$	200		$	816

	Alaska
Year Ended December 31, 2012	Mainline			Regional		Horizon			Consolidating			Air Group Adjusted(a)			Special Items(b)			Consolidated
Operating revenues
Passenger
Mainline	$	3,284		$	—	$	—		$	—		$	3,284		$	—		$	3,284
Regional	—			746		—			—			746			—			746
Total passenger revenues	3,284			746		—			—			4,030			—			4,030
CPA revenues	—			—		369			(369		)	—			—			—
Freight and mail	107			4		—			—			111			—			111
Other-net	448			61		7			—			516			—			516
Total operating revenues	3,839			811		376			(369		)	4,657			—			4,657
Operating expenses
Operating expenses, excluding fuel	2,131			566		338			(369		)	2,666			—			2,666
Economic fuel	1,238			183		—			—			1,421			38			1,459
Total operating expenses	3,369			749		338			(369		)	4,087			38			4,125
Nonoperating income (expense)
Interest income	19			—		—			—			19			—			19
Interest expense	(47		)	—		(16		)	(1		)	(64		)	—			(64		)
Other	24			—		2			1			27			—			27
	(4		)	—		(14		)	—			(18		)	—			(18		)
Income (loss) before income tax	$	466		$	62	$	24		$	—		$	552		$	(38	)	$	514

^(a)  The adjusted column represents the financial information that is reviewed by management to assess performance of operations and determine capital allocations and does not include certain income and charges.

^(b)  Includes accounting adjustments related to Special mileage plan revenue, mark-to-market fuel-hedge accounting charges, non-cash curtailment gain, and a one-time gain related to a legal matter.

	2014			2013			2012
Depreciation:
Alaska(a)	$	243		223			$	217
Horizon	51			47			47
Parent company	—			—			—
Consolidated	$	294		$	270		$	264
Capital expenditures:
Alaska(a)	$	659		$	494		$	477
Horizon	35			72			41
Consolidated	$	694		$	566		$	518
Total assets at end of period:
Alaska(a)	$	6,772		$	5,832
Horizon	818			840
Parent company	3,552			2,762
Elimination of inter-company accounts	(4,961		)	(3,596		)
Consolidated	$	6,181		$	5,838

^(a)  There are no depreciation expenses, capital expenditures or assets associated with purchased capacity flying at Alaska Regional.