OPERATING SEGMENT INFORMATION (Tables)

12 Months Ended

Dec. 31, 2022

Segment Reporting, Asset Reconciling Item [Line Items]

Schedule of Segment Reporting Information, by Segment

Operating segment information is as follows (in millions):

	Year Ended December 31, 2022
	Mainline		Regional		Horizon		Consolidating & Other(a)		Air Group Adjusted(b)			Special Items(c)		Consolidated
Operating Revenue
Passenger revenue	$	7,454	$	1,354	$	—	$	—	$	8,808		$	—	$	8,808
CPA revenue	—		—		359		(359)		—			—		—
Mileage Plan other revenue	538		52		—		—		590			—		590
Cargo and other revenue	244		—		—		4		248			—		248
Total Operating Revenue	8,236		1,406		359		(355)		9,646			—		9,646
Operating Expenses
Operating expenses, excluding fuel	5,216		1,085		383		(356)		6,328			580		6,908
Fuel expense	2,195		397		—		—		2,592			76		2,668
Total Operating Expenses	7,411		1,482		383		(356)		8,920			656		9,576
Non-operating Income (Expense)	30		—		(22)		1		9			—		9
Income (Loss) Before Income Tax	$	855	$	(76)	$	(46)	$	2	$	735		$	(656)	$	79
Pretax Margin									7.6		%			0.8		%

	Year Ended December 31, 2021
	Mainline		Regional		Horizon		Consolidating & Other(a)		Air Group Adjusted(b)			Special Items(c)		Consolidated
Operating Revenue
Passenger revenue	$	4,411	$	1,088	$	—	$	—	$	5,499		$	—	$	5,499
CPA revenue	—		—		406		(406)		—			—		—
Mileage Plan other revenue	402		59		—		—		461			—		461
Cargo and other revenue	212		—		—		4		216			—		216
Total Operating Revenue	5,025		1,147		406		(402)		6,176			—		6,176
Operating Expenses
Operating expenses, excluding fuel	4,101		1,096		373		(433)		5,137			(925)		4,212
Fuel expense	1,065		261		—		—		1,326			(47)		1,279
Total Operating Expenses	5,166		1,357		373		(433)		6,463			(972)		5,491
Non-operating Income (Expense)	(38)		—		(21)		3		(56)			—		(56)
Income (Loss) Before Income Tax	$	(179)	$	(210)	$	12	$	34	$	(343)		$	972	$	629
Pretax Margin									(5.6)		%			10.2		%

	Year Ended December 31, 2020
	Mainline		Regional		Horizon		Consolidating & Other(a)		Air Group Adjusted(b)			Special Items(c)		Consolidated
Operating Revenue
Passenger revenue	$	2,350	$	669	$	—	$	—	$	3,019		$	—	$	3,019
CPA revenue	—		—		386		(386)		—			—		—
Mileage Plan other revenue	309		65		—		—		374			—		374
Cargo and other revenue	170		—		—		3		173			—		173
Total Operating Revenue	2,829		734		386		(383)		3,566			—		3,566
Operating Expenses
Operating expenses, excluding fuel	3,630		993		323		(399)		4,547			71		4,618
Fuel expense	569		162		—		—		731			(8)		723
Total Operating Expenses	4,199		1,155		323		(399)		5,278			63		5,341
Non-operating Income (Expense)	(19)		—		(22)		2		(39)			(26)		(65)
Income (Loss) Before Income Tax	$	(1,389)	$	(421)	$	41	$	18	$	(1,751)		$	(89)	$	(1,840)
Pretax Margin									(49.1)		%			(51.6)		%

(a)Includes consolidating entries, Air Group parent company, McGee Air Services, and other immaterial business units.

(b)The Air Group Adjusted column represents the financial information that is reviewed by management to assess performance of operations and determine capital allocations and excludes certain charges.

(c)Includes special items, mark-to-market fuel-hedge accounting adjustments, and Payroll Support Program grant wage offsets.

	2022		2021		2020
Depreciation and amortization:
Mainline	$	351	$	323	$	346
Horizon	64		71		74
Consolidated	$	415	$	394	$	420
Capital expenditures:
Mainline	$	1,544	$	236	$	210
Horizon	127		56		12
Consolidated	$	1,671	$	292	$	222
Total assets at end of period:
Mainline	$	19,733	$	19,258
Horizon	1,157		1,212
Consolidating & Other	(6,704)		(6,519)
Consolidated	$	14,186	$	13,951