American Airlines (AAL) 10-K 19 Feb 20 2019 FY Annual report Financial data

Cover

Cover - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2019	Feb. 14, 2020	Jun. 30, 2019
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Period End Date	Dec. 31, 2019
Document Transition Report	false
Entity File Number	1-8400
Entity Registrant Name	American Airlines Group Inc.
Entity Central Index Key	0000006201
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	75-1825172
Entity Address, Address Line One	1 Skyview Drive,
Entity Address, City or Town	Fort Worth,
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	76155
City Area Code	(817)
Local Phone Number	963-1234
Title of 12(b) Security	Common Stock, $0.01 par value per share
Trading Symbol	AAL
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		426,058,744
Entity Public Float			$ 14.4
Documents Incorporated by Reference	Portions of the proxy statement related to American Airlines Group Inc.’s 2020 Annual Meeting of Stockholders, which proxy statement will be filed under the Securities Exchange Act of 1934 within 120 days of the end of American Airlines Group Inc.’s fiscal year ended December 31, 2019 , are incorporated by reference into Part III of this Annual Report on Form 10-K.
American Airlines, Inc. [Member]
Document Information [Line Items]
Entity File Number	1-2691
Entity Registrant Name	American Airlines, Inc.
Entity Central Index Key	0000004515
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	13-1502798
Entity Address, Address Line One	1 Skyview Drive,
Entity Address, City or Town	Fort Worth,
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	76155
City Area Code	(817)
Local Phone Number	963-1234
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		1,000

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating revenues:
Total operating revenues	$ 45,768	$ 44,541	$ 42,622
Operating expenses:
Aircraft fuel and related taxes	7,526	8,053	6,128
Salaries, wages and benefits	12,609	12,251	11,954
Regional expenses	7,501	7,133	6,546
Maintenance, materials and repairs	2,380	2,050	1,959
Other rent and landing fees	2,055	1,900	1,806
Aircraft rent	1,326	1,264	1,197
Selling expenses	1,602	1,520	1,477
Depreciation and amortization	1,982	1,839	1,702
Special items, net	635	787	712
Other	5,087	5,088	4,910
Total operating expenses	42,703	41,885	38,391
Operating income	3,065	2,656	4,231
Nonoperating income (expense):
Interest income	127	118	94
Interest expense, net	(1,095)	(1,056)	(1,053)
Other income, net	159	166	123
Total nonoperating expense, net	(809)	(772)	(836)
Income before income taxes	2,256	1,884	3,395
Income tax provision	570	472	2,113
Net income	$ 1,686	$ 1,412	$ 1,282
Earnings per common share:
Basic (in dollars per share)	$ 3.80	$ 3.04	$ 2.62
Diluted (in dollars per share)	$ 3.79	$ 3.03	$ 2.61
Weighted average shares outstanding:
Basic (in shares)	443,363	464,236	489,164
Diluted (in shares)	444,269	465,660	491,692
Cash dividends declared per common share (in dollars per share)	$ 0.40	$ 0.40	$ 0.40
Passenger [Member]
Operating revenues:
Total operating revenues	$ 42,010	$ 40,676	$ 39,131
Cargo [Member]
Operating revenues:
Total operating revenues	863	1,013	890
Other [Member]
Operating revenues:
Total operating revenues	2,895	2,852	2,601
American Airlines, Inc. [Member]
Operating revenues:
Total operating revenues	45,761	44,530	42,610
Operating expenses:
Aircraft fuel and related taxes	7,526	8,053	6,128
Salaries, wages and benefits	12,600	12,240	11,942
Regional expenses	7,518	7,064	6,572
Maintenance, materials and repairs	2,380	2,050	1,959
Other rent and landing fees	2,055	1,900	1,806
Aircraft rent	1,326	1,264	1,197
Selling expenses	1,602	1,520	1,477
Depreciation and amortization	1,982	1,839	1,702
Special items, net	635	787	712
Other	5,090	5,090	4,910
Total operating expenses	42,714	41,807	38,405
Operating income	3,047	2,723	4,205
Nonoperating income (expense):
Interest income	515	330	215
Interest expense, net	(1,109)	(1,028)	(988)
Other income, net	152	167	123
Total nonoperating expense, net	(442)	(531)	(650)
Income before income taxes	2,605	2,192	3,555
Income tax provision	633	534	2,270
Net income	1,972	1,658	1,285
American Airlines, Inc. [Member] | Passenger [Member]
Operating revenues:
Total operating revenues	42,010	40,676	39,131
American Airlines, Inc. [Member] | Cargo [Member]
Operating revenues:
Total operating revenues	863	1,013	890
American Airlines, Inc. [Member] | Other [Member]
Operating revenues:
Total operating revenues	$ 2,888	$ 2,841	$ 2,589

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net income	$ 1,686	$ 1,412	$ 1,282
Other comprehensive income (loss), net of tax:
Pension, retiree medical and other postretirement benefits	(438)	(117)	(70)
Investments	3	(3)	(1)
Total other comprehensive loss, net of tax	(435)	(120)	(71)
Total comprehensive income	1,251	1,292	1,211
American Airlines, Inc. [Member]
Net income	1,972	1,658	1,285
Other comprehensive income (loss), net of tax:
Pension, retiree medical and other postretirement benefits	(434)	(116)	(68)
Investments	3	(3)	(1)
Total other comprehensive loss, net of tax	(431)	(119)	(69)
Total comprehensive income	$ 1,541	$ 1,539	$ 1,216

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Current assets
Cash	$ 280	$ 275
Short-term investments	3,546	4,485
Restricted cash and short-term investments	158	154
Accounts receivable, net	1,750	1,706
Aircraft fuel, spare parts and supplies, net	1,851	1,522
Prepaid expenses and other	621	495
Total current assets	8,206	8,637
Operating property and equipment
Flight equipment	42,537	41,499
Ground property and equipment	9,443	8,764
Equipment purchase deposits	1,674	1,278
Total property and equipment, at cost	53,654	51,541
Less accumulated depreciation and amortization	(18,659)	(17,443)
Total property and equipment, net	34,995	34,098
Operating lease right-of-use assets	8,737	9,151
Other assets
Goodwill	4,091	4,091
Intangibles, net of accumulated amortization of $704 and $663, respectively	2,084	2,137
Deferred tax asset	645	1,145
Other assets	1,237	1,321
Total other assets	8,057	8,694
Total assets	59,995	60,580
Current liabilities
Current maturities of long-term debt and finance leases	2,861	3,294
Accounts payable	2,062	1,773
Accrued salaries and wages	1,541	1,427
Operating lease liabilities	1,708	1,654
Other accrued liabilities	2,138	2,342
Total current liabilities	18,311	18,096
Noncurrent liabilities
Long-term debt and finance leases, net of current maturities	21,454	21,179
Pension and postretirement benefits	6,052	6,907
Loyalty program liability	5,422	5,272
Operating lease liabilities	7,421	7,902
Other liabilities	1,453	1,393
Total noncurrent liabilities	41,802	42,653
Stockholders' equity (deficit)
Common stock	4	5
Additional paid-in capital	3,945	4,964
Accumulated other comprehensive loss	(6,331)	(5,896)
Retained earnings	2,264	758
Total stockholders' deficit	(118)	(169)
Total liabilities and stockholders’ equity (deficit)	59,995	60,580
Air traffic [Member]
Current liabilities
Deferred revenue, current	4,808	4,339
Loyalty program [Member]
Current liabilities
Deferred revenue, current	3,193	3,267
American Airlines, Inc. [Member]
Current assets
Cash	267	265
Short-term investments	3,543	4,482
Restricted cash and short-term investments	158	154
Accounts receivable, net	1,770	1,755
Receivables from related parties, net	12,451	10,666
Aircraft fuel, spare parts and supplies, net	1,754	1,442
Prepaid expenses and other	584	493
Total current assets	20,527	19,257
Operating property and equipment
Flight equipment	42,213	41,180
Ground property and equipment	9,089	8,466
Equipment purchase deposits	1,674	1,277
Total property and equipment, at cost	52,976	50,923
Less accumulated depreciation and amortization	(18,335)	(17,123)
Total property and equipment, net	34,641	33,800
Operating lease right-of-use assets	8,694	9,094
Other assets
Goodwill	4,091	4,091
Intangibles, net of accumulated amortization of $704 and $663, respectively	2,084	2,137
Deferred tax asset	689	1,280
Other assets	1,164	1,219
Total other assets	8,028	8,727
Total assets	71,890	70,878
Current liabilities
Current maturities of long-term debt and finance leases	2,358	2,547
Accounts payable	1,990	1,707
Accrued salaries and wages	1,461	1,363
Operating lease liabilities	1,695	1,639
Other accrued liabilities	2,055	2,259
Total current liabilities	17,560	17,121
Noncurrent liabilities
Long-term debt and finance leases, net of current maturities	20,684	20,650
Pension and postretirement benefits	6,008	6,863
Loyalty program liability	5,422	5,272
Operating lease liabilities	7,388	7,857
Other liabilities	1,406	1,345
Total noncurrent liabilities	40,908	41,987
Commitments and contingencies
Stockholders' equity (deficit)
Common stock	0	0
Additional paid-in capital	16,903	16,802
Accumulated other comprehensive loss	(6,423)	(5,992)
Retained earnings	2,942	960
Total stockholders' deficit	13,422	11,770
Total liabilities and stockholders’ equity (deficit)	71,890	70,878
American Airlines, Inc. [Member] | Air traffic [Member]
Current liabilities
Deferred revenue, current	4,808	4,339
American Airlines, Inc. [Member] | Loyalty program [Member]
Current liabilities
Deferred revenue, current	$ 3,193	$ 3,267

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Accumulated amortization of intangibles	$ 704	$ 663
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,750,000,000	1,750,000,000
Common stock, shares outstanding (in shares)	428,202,506	460,610,870
American Airlines, Inc. [Member]
Accumulated amortization of intangibles	$ 704	$ 663
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	1,000	1,000
Common stock, shares issued (in shares)	1,000	1,000
Common stock, shares outstanding (in shares)	1,000	1,000

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
Cash flows from operating activities:
Net income		$ 1,686		$ 1,412		$ 1,282
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization		2,318		2,159		2,017
Net gains from sale of property and equipment and sale-leaseback transactions		(112)		(59)		(11)
Special items, net non-cash		376		458		272
Pension and postretirement		(178)		(300)		(132)
Deferred income tax provision		560		440		2,089
Share-based compensation		94		86		90
Other, net		(62)		(97)		(142)
Changes in operating assets and liabilities:
Decrease (increase) in accounts receivable		73		222		(190)
Increase in other assets		(373)		(390)		(433)
Increase (decrease) in accounts payable and accrued liabilities		327		(147)		299
Contributions to pension plans		(1,230)		(475)		(286)
Increase (decrease) in other liabilities		(209)		210		132
Net cash provided by operating activities		3,815		3,533		4,744
Cash flows from investing activities:
Capital expenditures and aircraft purchase deposits		(4,268)		(3,745)		(5,971)
Proceeds from sale-leaseback transactions		850
Proceeds from sale-leaseback transactions				1,096		853
Proceeds from sale of property and equipment		54		111		94
Purchases of short-term investments		(3,184)		(3,412)		(4,633)
Sales of short-term investments		4,144		3,705		5,915
Proceeds from vendor		250		0		0
Decrease (increase) in restricted short-term investments		(3)		72		309
Proceeds from sale of investments		0		207		0
Purchase of equity investment		0		0		(203)
Other investing activities		(86)		(7)		0
Net cash used in investing activities		(2,243)		(1,973)		(3,636)
Cash flows from financing activities:
Proceeds from issuance of long-term debt		3,960		2,354		3,058
Payments on long-term debt and finance leases		(4,190)		(2,941)		(2,332)
Deferred financing costs		(61)		(59)		(85)
Treasury stock repurchases		(1,097)		(837)		(1,615)
Dividend payments		(178)		(186)		(198)
Other financing activities		(2)		(3)		27
Net cash used in financing activities		(1,568)		(1,672)		(1,145)
Net increase (decrease) in cash and restricted cash		4		(112)		(37)
Cash and restricted cash at beginning of year		286	[1]	398	[1]	435
Cash and restricted cash at end of year	[1]	290		286		398
American Airlines, Inc. [Member]
Cash flows from operating activities:
Net income		1,972		1,658		1,285
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization		2,267		2,108		1,964
Net gains from sale of property and equipment and sale-leaseback transactions		(109)		(57)		2
Special items, net non-cash		384		458		272
Pension and postretirement		(178)		(302)		(132)
Deferred income tax provision		623		503		2,246
Share-based compensation		94		86		90
Other, net		(56)		(102)		(146)
Changes in operating assets and liabilities:
Decrease (increase) in accounts receivable		130		232		(189)
Increase in other assets		(321)		(354)		(405)
Increase (decrease) in accounts payable and accrued liabilities		273		(171)		266
Increase in receivables from related parties, net		(1,772)		(1,849)		(1,994)
Contributions to pension plans		(1,224)		(472)		(286)
Increase (decrease) in other liabilities		(199)		191		140
Net cash provided by operating activities		2,429		1,943		2,870
Cash flows from investing activities:
Capital expenditures and aircraft purchase deposits		(4,156)		(3,677)		(5,881)
Proceeds from sale-leaseback transactions		850
Proceeds from sale-leaseback transactions				1,096		853
Proceeds from sale of property and equipment		49		106		69
Purchases of short-term investments		(3,184)		(3,412)		(4,633)
Sales of short-term investments		4,144		3,705		5,915
Proceeds from vendor		250		0		0
Decrease (increase) in restricted short-term investments		(3)		72		309
Proceeds from sale of investments		0		207		0
Purchase of equity investment		0		0		(203)
Other investing activities		(96)		(7)		0
Net cash used in investing activities		(2,146)		(1,910)		(3,571)
Cash flows from financing activities:
Proceeds from issuance of long-term debt		3,210		2,354		3,058
Payments on long-term debt and finance leases		(3,440)		(2,442)		(2,332)
Deferred financing costs		(52)		(59)		(85)
Other financing activities		0		0		27
Net cash used in financing activities		(282)		(147)		668
Net increase (decrease) in cash and restricted cash		1		(114)		(33)
Cash and restricted cash at beginning of year		276	[2]	390	[2]	423
Cash and restricted cash at end of year	[2]	277		276		390
Air traffic [Member]
Changes in operating assets and liabilities:
Increase (decrease) in customer liabilities		469		297		65
Air traffic [Member] | American Airlines, Inc. [Member]
Changes in operating assets and liabilities:
Increase (decrease) in customer liabilities		469		297		65
Loyalty program [Member]
Changes in operating assets and liabilities:
Increase (decrease) in customer liabilities		76		(283)		(308)
Loyalty program [Member] | American Airlines, Inc. [Member]
Changes in operating assets and liabilities:
Increase (decrease) in customer liabilities		$ 76		$ (283)		$ (308)
[1]	The following table provides a reconciliation of cash and restricted cash to amounts reported within the consolidated balance sheets: Cash $ 280 $ 275 $ 295 Restricted cash included in restricted cash and short-term investments 10 11 103 Total cash and restricted cash $ 290 $ 286 $ 398
[2]	The following table provides a reconciliation of cash and restricted cash to amounts reported within the consolidated balance sheets: Cash $ 267 $ 265 $ 287 Restricted cash included in restricted cash and short-term investments 10 11 103 Total cash and restricted cash $ 277 $ 276 $ 390

Consolidated Statements of Ca_2

Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Cash	$ 280		$ 275		$ 295
Restricted cash included in restricted cash and short-term investments	10		11		103
Total cash and restricted cash	290	[1]	286	[1]	398	[1]	$ 435
American Airlines, Inc. [Member]
Cash	267		265		287
Restricted cash included in restricted cash and short-term investments	10		11		103
Total cash and restricted cash	$ 277	[2]	$ 276	[2]	$ 390	[2]	$ 423
[1]	The following table provides a reconciliation of cash and restricted cash to amounts reported within the consolidated balance sheets: Cash $ 280 $ 275 $ 295 Restricted cash included in restricted cash and short-term investments 10 11 103 Total cash and restricted cash $ 290 $ 286 $ 398
[2]	The following table provides a reconciliation of cash and restricted cash to amounts reported within the consolidated balance sheets: Cash $ 267 $ 265 $ 287 Restricted cash included in restricted cash and short-term investments 10 11 103 Total cash and restricted cash $ 277 $ 276 $ 390

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Total	American Airlines, Inc. [Member]	Common Stock [Member]	Common Stock [Member]American Airlines, Inc. [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member]American Airlines, Inc. [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Other Comprehensive Loss [Member]American Airlines, Inc. [Member]	Retained Earnings (Deficit) [Member]	Retained Earnings (Deficit) [Member]American Airlines, Inc. [Member]
Beginning Balance at Dec. 31, 2016	$ (284)	$ 8,580	$ 5	$ 0	$ 7,223	$ 16,624	$ (5,083)	$ (5,182)	$ (2,429)	$ (2,862)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,282	1,285							1,282	1,285
Other comprehensive loss, net	(71)	(69)					(71)	(69)
Issuance of shares of AAG common stock pursuant to employee stock plans net of shares withheld for cash taxes	(51)				(51)
Purchase and retirement of AAG common stock	(1,563)		0		(1,563)
Dividends declared on AAG common stock	(198)								(198)
Settlement of single-dip unsecured claims held in Disputed Claims Reserve	15				15
Share-based compensation expense	90	90			90	90
Intercompany equity transfer		2				2
Adoption of Accounting Standards Update (ASU) 2018-02 related to comprehensive income							(622)	(622)	622	622
Ending Balance at Dec. 31, 2017	(780)	9,888	5	0	5,714	16,716	(5,776)	(5,873)	(723)	(955)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,412	1,658							1,412	1,658
Other comprehensive loss, net	(120)	(119)					(120)	(119)
Issuance of shares of AAG common stock pursuant to employee stock plans net of shares withheld for cash taxes	(37)				(37)
Purchase and retirement of AAG common stock	(799)				(799)
Dividends declared on AAG common stock	(188)								(188)
Share-based compensation expense	86	86			86	86
Ending Balance at Dec. 31, 2018	(169)	11,770	5	0	4,964	16,802	(5,896)	(5,992)	758	960
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,686	1,972							1,686	1,972
Other comprehensive loss, net	(435)	(431)					(435)	(431)
Issuance of shares of AAG common stock pursuant to employee stock plans net of shares withheld for cash taxes	(25)				(25)
Purchase and retirement of AAG common stock	(1,096)		(1)		(1,095)
Dividends declared on AAG common stock	(180)								(180)
Settlement of single-dip unsecured claims held in Disputed Claims Reserve	7				7
Share-based compensation expense	94	94			94	94
Intercompany equity transfer		17				7				10
Ending Balance at Dec. 31, 2019	$ (118)	$ 13,422	$ 4	$ 0	$ 3,945	$ 16,903	$ (6,331)	$ (6,423)	$ 2,264	$ 2,942

Consolidated Statements of St_2

Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Stockholders' Equity [Abstract]
Purchase and retirement of common stock (in shares)	34,090,566	16,606,157	33,953,127
Dividends declared on common stock (in dollars per share)	$ 0.40	$ 0.40	$ 0.40
Issuance of shares of common stock pursuant to employee stock plans (in shares)	1,682,202	1,709,140	2,166,861

Basis of Presentation and Summa

Basis of Presentation and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2019
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Basis of Presentation and Summary of Significant Accounting Policies	Basis of Presentation and Summary of Significant Accounting Policies (a) Basis of Presentation American Airlines Group Inc. (we, us, our and similar terms, or AAG), a Delaware corporation, is a holding company whose primary business activity is the operation of a major network air carrier, providing scheduled air transportation for passengers and cargo through its mainline operating subsidiary, American Airlines, Inc. (American) and its wholly-owned regional airline subsidiaries, Envoy Aviation Group Inc., PSA Airlines, Inc. and Piedmont Airlines, Inc. that operate under the brand American Eagle. On December 9, 2013, a subsidiary of AMR Corporation (AMR) merged with and into US Airways Group, Inc. (US Airways Group), a Delaware corporation, which survived as a wholly-owned subsidiary of AAG, and AAG emerged from Chapter 11 (the Merger). Upon closing of the Merger and emergence from Chapter 11, AMR changed its name to American Airlines Group Inc. All significant intercompany transactions have been eliminated. The preparation of financial statements in accordance with accounting principles generally accepted in the United States (GAAP) requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, revenues and expenses, and the disclosure of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates. The most significant areas of judgment relate to passenger revenue recognition, impairment of goodwill, impairment of long-lived and intangible assets, the loyalty program, as well as pension and retiree medical and other postretirement benefits. (b) Recent Accounting Pronouncements ASU 2016-02: Leases (Topic 842) (the New Lease Standard) The New Lease Standard requires lessees to recognize a lease liability and a right-of-use (ROU) asset on the balance sheet for operating leases. Accounting for finance leases is substantially unchanged. The New Lease Standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. In the fourth quarter of 2018, we elected to early adopt the New Lease Standard as of January 1, 2018 using a modified retrospective transition, with the cumulative-effect adjustment to the opening balance of retained earnings as of the effective date (the effective date method). Under the effective date method, financial results reported in periods prior to 2018 are unchanged. We also elected the package of practical expedients, which among other things, does not require reassessment of lease classification. The adoption of the New Lease Standard had a significant impact on our consolidated balance sheet due to the recognition of approximately $10 billion of lease liabilities with corresponding right-of-use assets for operating leases. Additionally, we recognized a $197 million cumulative effect adjustment credit, net of tax, to retained earnings. The adjustment to retained earnings was driven principally by sale-leaseback transactions including the recognition of unamortized deferred aircraft sale-leaseback gains. Prior to the adoption of the New Lease Standard, gains on sale-leaseback transactions were generally deferred and recognized in the income statement over the lease term. Under the New Lease Standard, gains on sale-leaseback transactions (subject to adjustment for off-market terms) are recognized immediately. ASU 2018-02: Income Statement – Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income This ASU provides the option to reclassify stranded tax effects within accumulated other comprehensive income to retained earnings due to the U.S. federal corporate income tax rate change as a result of H.R. 1, the 2017 Tax Cuts and Jobs Act (the 2017 Tax Act). The amount of the reclassification is the difference between the amount initially charged or credited directly to other comprehensive income at the previous U.S. federal corporate income tax rate that remains in accumulated other comprehensive income and the amount that would have been charged or credited directly to other comprehensive income using the newly enacted U.S. federal corporate income tax rate, excluding the effect of any valuation allowance previously charged to income from continuing operations. This standard is effective for interim and annual reporting periods beginning after December 15, 2018. In the first quarter of 2019, we adopted this standard retrospectively as of December 22, 2017, the date the 2017 Tax Act was enacted, which resulted in the recast of prior reporting periods. As a result of the adoption, we reclassified $622 million of stranded tax effects principally related to our pension plans from accumulated other comprehensive loss to retained earnings. ASU 2016-13: Financial Instruments – Credit Losses (Topic 326) This ASU requires the use of an expected loss model for certain types of financial instruments and requires consideration of a broader range of reasonable and supportable information to calculate credit loss estimates. For trade receivables, loans and held-to - maturity debt securities, an estimate of lifetime expected credit losses is required. For available-for-sale debt securities, an allowance for credit losses will be required rather than a reduction to the carrying value of the asset. This standard is effective for interim and annual reporting periods beginning after December 15, 2019. While we have not completed our evaluation of the impact of adoption of this standard, we do not expect it to have a material impact on our consolidated financial statements. (c) Short-term Investments Short-term investments are classified as available-for-sale and stated at fair value. Realized gains and losses are recorded in nonoperating expense on our consolidated statements of operations. Unrealized gains and losses are recorded in accumulated other comprehensive loss on our consolidated balance sheets. (d) Restricted Cash and Short-term Investments We have restricted cash and short-term investments related primarily to collateral held to support workers’ compensation obligations. (e) Aircraft Fuel, Spare Parts and Supplies, Net Aircraft fuel is recorded on a first-in, first-out basis. Spare parts and supplies are recorded at average costs less an allowance for obsolescence. These items are expensed when used. (f) Operating Property and Equipment Operating property and equipment is recorded at cost and depreciated or amortized to residual values over the asset’s estimated useful life or the lease term, whichever is less, using the straight-line method. Residual values for aircraft, engines and related rotable parts are generally 5% to 10% of original cost. Costs of major improvements that enhance the usefulness of the asset are capitalized and depreciated or amortized over the estimated useful life of the asset or the lease term, whichever is less. The estimated useful lives for the principal property and equipment classifications are as follows: Principal Property and Equipment Classification Estimated Useful Life Aircraft, engines and related rotable parts 20 – 30 years Buildings and improvements 5 – 30 years Furniture, fixtures and other equipment 3 – 10 years Capitalized software 5 – 10 years We assess impairment of operating property and equipment when events and circumstances indicate that the assets may be impaired. An asset or group of assets is considered impaired when the undiscounted cash flows estimated to be generated by the assets are less than the carrying amount of the assets and the net book value of the assets exceeds their estimated fair value. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets. Assets to be disposed of are reported at the lower of the carrying amount or fair value less the cost to sell. Total depreciation and amortization expense was $2.6 billion , $2.4 billion and $2.2 billion for the years ended December 31, 2019 , 2018 and 2017 , respectively. (g) Leases We determine if an arrangement is a lease at inception. Operating leases are included in operating lease right-of-use (ROU) assets, current operating lease liabilities and noncurrent operating lease liabilities in our consolidated balance sheet. Finance leases are included in property and equipment, current maturities of long-term debt and finance leases and long-term debt and finance leases, net of current maturities, in our consolidated balance sheets. ROU assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. ROU assets and liabilities are recognized at the lease commencement date based on the estimated present value of lease payments over the lease term. We use our estimated incremental borrowing rate, which is derived from information available at the lease commencement date , in determining the present value of lease payments. We give consideration to our recent debt issuances as well as publicly available data for instruments with similar characteristics when calculating our incremental borrowing rates. Our lease term includes options to extend the lease when it is reasonably certain that we will exercise that option. Leases with a term of 12 months or less are not recorded on the balance sheet. Our lease agreements do not contain any residual value guarantees. Under certain of our capacity purchase agreements with third-party regional carriers, we do not own the underlying aircraft. However, since we control the marketing, scheduling, ticketing, pricing and seat inventories of these aircraft and therefore control the asset, the aircraft is deemed to be leased for accounting purposes. For these capacity purchase agreements, we account for the lease and non-lease components separately. The lease component consists of the aircraft and the non-lease components consist of services, such as the crew and maintenance. We allocate the consideration in the capacity purchase agreements to the lease and non-lease components using their estimated relative standalone prices. See Note 12(b) for additional information on our capacity purchase agreements . For real estate, we account for the lease and non-lease components as a single lease component. (h) Income Taxes Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are recorded net as noncurrent deferred income taxes. We provide a valuation allowance for our deferred tax assets when it is more likely than not that some portion, or all of our deferred tax assets, will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income. We consider all available positive and negative evidence and make certain assumptions in evaluating the realizability of our deferred tax assets. Many factors are considered that impact our assessment of future profitability, including conditions which are beyond our control, such as the health of the economy, the availability and price volatility of aircraft fuel and travel demand. (i) Goodwill Goodwill represents the excess of the purchase price over the fair value of the net assets acquired and liabilities assumed. Goodwill is not amortized but assessed for impairment annually on October 1 or more frequently if events or circumstances indicate that goodwill may be impaired. We have one consolidated reporting unit. Goodwill is assessed for impairment by initially performing a qualitative assessment and, if necessary, then comparing the fair value of the reporting unit to its carrying value, including goodwill. If the fair value of the reporting unit is less than the carrying value, a second step is performed to determine the implied fair value of goodwill. If the implied fair value of goodwill is lower than its carrying value, an impairment charge equal to the difference is recorded. Based upon our annual assessment, there was no goodwill impairment in 2019 . The carrying value of the goodwill on our consolidated balance sheets was $4.1 billion as of December 31, 2019 and 2018 . (j) Other Intangibles, Net Intangible assets consist primarily of domestic airport slots, customer relationships, marketing agreements, international slots and route authorities, airport gate leasehold rights and tradenames. Definite-Lived Intangible Assets Definite-lived intangible assets are amortized over their respective estimated useful lives and reviewed for impairment whenever events or changes in circumstances indicate that the carrying value may not be recoverable. The following table provides information relating to our amortizable intangible assets as of December 31, 2019 and 2018 (in millions): December 31, 2019 2018 Domestic airport slots $ 365 $ 365 Customer relationships 300 300 Marketing agreements 105 105 Tradenames 35 35 Airport gate leasehold rights 137 137 Accumulated amortization (704 ) (663 ) Total $ 238 $ 279 Certain domestic airport slots and airport gate leasehold rights are amortized on a straight-line basis over 25 years . The customer relationships and marketing agreements were identified as intangible assets subject to amortization and are amortized on a straight-line basis over approximately nine years and 30 years , respectively. Tradenames are fully amortized. We recorded amortization expense related to these intangible assets of $41 million for both years ended December 31, 2019 and 2018 and $44 million for 2017 . We expect to record annual amortization expense for these intangible assets as follows (in millions): 2020 $ 41 2021 41 2022 41 2023 7 2024 7 2025 and thereafter 101 Total $ 238 Indefinite-Lived Intangible Assets Indefinite-lived intangible assets include certain domestic airport slots and international slots and route authorities. Indefinite-lived intangible assets are not amortized but instead are assessed for impairment annually on October 1 or more frequently if events or circumstances indicate that the asset may be impaired. As of December 31, 2019 and 2018 , we had $1.8 billion and $1.9 billion , respectively, of indefinite-lived intangible assets on our consolidated balance sheets. Indefinite-lived intangible assets are assessed for impairment by initially performing a qualitative assessment to determine whether we believe it is more likely than not that an asset has been impaired. If we believe impairment has occurred, we then evaluate for impairment by comparing the estimated fair value of assets to the carrying value. An impairment charge is recognized if the asset’s estimated fair value is less than its carrying value. Based upon our annual assessment, there were no material indefinite-lived intangible asset impairments in 2019 . (k) Revenue Recognition Revenue The following are the significant categories comprising our reported operating revenues (in millions): Year Ended December 31, 2019 2018 2017 Passenger revenue: Passenger travel $ 38,831 $ 37,457 $ 36,152 Loyalty revenue - travel (1) 3,179 3,219 2,979 Total passenger revenue 42,010 40,676 39,131 Cargo 863 1,013 890 Other: Loyalty revenue - marketing services 2,361 2,352 2,124 Other revenue 534 500 477 Total other revenue 2,895 2,852 2,601 Total operating revenues $ 45,768 $ 44,541 $ 42,622 (1) Loyalty revenue included in passenger revenue is principally comprised of mileage credit redemptions earned through travel or from co-branded credit card and other partners. See “ Loyalty Revenue ” below for further discussion on these mileage credits. The following is our total passenger revenue by geographic region (in millions): Year Ended December 31, 2019 2018 2017 Domestic $ 30,881 $ 29,573 $ 28,749 Latin America 5,047 5,125 4,840 Atlantic 4,624 4,376 4,028 Pacific 1,458 1,602 1,514 Total passenger revenue $ 42,010 $ 40,676 $ 39,131 We attribute passenger revenue by geographic region based upon the origin and destination of each flight segment. Passenger Revenue We recognize all revenues generated from transportation on American and our regional flights operated under the brand name American Eagle, including associated baggage fees, ticketing change fees and other inflight services, as passenger revenue when transportation is provided. Ticket and other related sales for transportation that has not yet been provided are initially deferred and recorded as air traffic liability on our consolidated balance sheets. The air traffic liability principally represents tickets sold for future travel on American and partner airlines, as well as estimated future refunds and exchanges of tickets sold for past travel. The majority of tickets sold are nonrefundable. A small percentage of tickets, some of which are partially used tickets, expire unused. Due to complex pricing structures, refund and exchange policies, and interline agreements with other airlines, certain amounts are recognized in passenger revenue using estimates regarding both the timing of the revenue recognition and the amount of revenue to be recognized. These estimates are generally based on the analysis of our historical data. We have consistently applied this accounting method to estimate revenue from unused tickets at the date of travel. Estimated future refunds and exchanges included in the air traffic liability are routinely evaluated based on subsequent activity to validate the accuracy of our estimates. Any adjustments resulting from periodic evaluations of the estimated air traffic liability are included in passenger revenue during the period in which the evaluations are completed. Various taxes and fees assessed on the sale of tickets to end customers are collected by us as an agent and remitted to taxing authorities. These taxes and fees have been presented on a net basis in the accompanying consolidated statements of operations and recorded as a liability until remitted to the appropriate taxing authority. Loyalty Revenue We currently operate the loyalty program, AAdvantage. This program awards mileage credits to passengers who fly on American, any one world airline or other partner airlines, or by using the services of other program participants, such as the Citi and Barclaycard US co-branded credit cards, and certain hotels and car rental companies. Mileage credits can be redeemed for travel on American and other participating partner airlines, as well as other non-air travel awards such as hotels and rental cars. For mileage credits earned by AAdvantage loyalty program members, we apply the deferred revenue method. Mileage credits earned through travel For mileage credits earned through travel, we apply a relative selling price approach whereby the total amount collected from each passenger ticket sale is allocated between the air transportation and the mileage credits earned. The portion of each passenger ticket sale attributable to mileage credits earned is initially deferred and then recognized in passenger revenue when mileage credits are redeemed and transportation is provided. The estimated selling price of mileage credits is determined using an equivalent ticket value approach, which uses historical data, including award redemption patterns by geographic region and class of service, as well as similar fares as those used to settle award redemptions. The estimated selling price of miles is adjusted for an estimate of miles that will not be redeemed based on historical redemption patterns. Mileage credits sold to co-branded credit cards and other partners We sell mileage credits to participating airline partners and non-airline business partners, including our co-branded credit card partners, under contracts with terms extending generally for one to seven years. Consideration received from the sale of mileage credits is variable and payment terms typically are within 30 days subsequent to the month of mileage sale. Sales of mileage credits to non-airline business partners are comprised of two components, transportation and marketing. We allocate the consideration received from these sales of mileage credits based on the relative selling price of each product or service delivered. Our most significant partner agreements are our co-branded credit card agreements with Citi and Barclaycard US that we entered into in 2016. We identified the following revenue elements in these co-branded credit card agreements: the transportation component; and the use of intellectual property, including the American brand and access to loyalty program member lists, which is the predominant element in the agreements, as well as advertising (collectively, the marketing component). Accordingly, we recognize the marketing component in other revenue in the period of the mileage sale following the sales-based royalty method. The transportation component represents the estimated selling price of future travel awards and is determined using the same equivalent ticket value approach described above. The portion of each mileage credit sold attributable to transportation is initially deferred and then recognized in passenger revenue when mileage credits are redeemed and transportation is provided. For the portion of our outstanding mileage credits that we estimate will not be redeemed, we recognize the associated value proportionally as the remaining mileage credits are redeemed. Our estimates are based on analysis of historical redemptions. Cargo Revenue Cargo revenue is recognized when we provide the transportation. Other Revenue Other revenue includes revenue associated with our loyalty program, which is comprised principally of the marketing component of mileage sales to co-branded credit card and other partners and other marketing related payments. Loyalty revenue included in other revenue was $2.4 billion for both years ended December 31, 2019 and 2018 and $2.1 billion for 2017 . The accounting and recognition for the loyalty program marketing services are discussed above in “ Loyalty Revenue .” The remaining amounts included within other revenue relate to airport clubs, advertising and vacation-related services. Contract Balances Our significant contract liabilities are comprised of (1) outstanding loyalty program mileage credits that may be redeemed for future travel and other non-air travel awards, reported as loyalty program liability on our consolidated balance sheets and (2) ticket sales for transportation that has not yet been provided, reported as air traffic liability on our consolidated balance sheets. December 31, 2019 2018 (in millions) Loyalty program liability $ 8,615 $ 8,539 Air traffic liability 4,808 4,339 Total $ 13,423 $ 12,878 The balance of the loyalty program liability fluctuates based on seasonal patterns, which impact the volume of mileage credits issued through travel or sold to co-branded credit card and other partners (deferral of revenue) and mileage credits redeemed (recognition of revenue). Changes in loyalty program liability are as follows (in millions): Balance at December 31, 2018 $ 8,539 Deferral of revenue 3,438 Recognition of revenue (1) (3,362 ) Balance at December 31, 2019 (2) $ 8,615 (1) Principally relates to revenue recognized from the redemption of mileage credits for both air and non-air travel awards. Mileage credits are combined in one homogenous pool and are not separately identifiable. As such, the revenue is comprised of miles that were part of the loyalty program deferred revenue balance at the beginning of the period, as well as miles that were issued during the period. (2) Mileage credits can be redeemed at any time and do not expire as long as that AAdvantage member has any type of qualifying activity at least every 18 months . As of December 31, 2019 , our current loyalty program liability was $3.2 billion and represents our current estimate of revenue expected to be recognized in the next 12 months based on historical trends, with the balance reflected in long-term loyalty program liability expected to be recognized as revenue in periods thereafter. The air traffic liability principally represents tickets sold for future travel on American and partner airlines, as well as estimated future refunds and exchanges of tickets sold for past travel. The balance in our air traffic liability also fluctuates with seasonal travel patterns. The contract duration of passenger tickets is one year . Accordingly, any revenue associated with tickets sold for future travel will be recognized within 12 months. For 2019 , $3.3 billion of revenue was recognized in passenger revenue that was included in our air traffic liability at December 31, 2018 . With respect to contract receivables, reflected as accounts receivable, net on the accompanying consolidated balance sheets, these primarily include receivables for tickets sold to individual passengers through the use of major credit cards. These receivables are short-term, mostly settled within seven days after sale. Bad debt losses, which have been minimal in the past, have been considered in establishing allowances for doubtful accounts. (l) Maintenance, Materials and Repairs Maintenance and repair costs for owned and leased flight equipment are charged to operating expense as incurred, except costs incurred for maintenance and repair under flight hour maintenance contract agreements, which are accrued based on contractual terms when an obligation exists. (m) Selling Expenses Selling expenses include credit card fees, commissions, computerized reservations systems fees and advertising. Selling expenses associated with passenger revenue are expensed when the transportation or service is provided. Advertising costs are expensed as incurred. Advertising expense was $129 million , $128 million and $135 million for the years ended December 31, 2019 , 2018 and 2017 , respectively. (n) Share-based Compensation We account for our share-based compensation expense based on the fair value of the stock award at the time of grant, which is recognized ratably over the vesting period of the stock award. The majority of our stock awards are time vested restricted stock units, and the fair value of such awards is based on the market price of the underlying shares of AAG common stock on the date of grant. See Note 15 for further discussion of share-based compensation. (o) Foreign Currency Gains and Losses Foreign currency gains and losses are recorded as part of other income, net within total nonoperating expense, net in our consolidated statements of operations. For the years ended December 31, 2019 , 2018 and 2017 , respectively, foreign currency losses were $32 million , $55 million and $4 million . (p) Other Operating Expenses Other operating expenses includes costs associated with ground and cargo handling, crew travel, aircraft food and catering, passenger accommodation, airport security, international navigation fees and certain general and administrative expenses. (q) Regional Expenses Expenses associated with American Eagle operations are classified as regional expenses on our consolidated statements of operations. Regional expenses consist of the following (in millions): Year Ended December 31, 2019 2018 2017 Aircraft fuel and related taxes $ 1,869 $ 1,843 $ 1,382 Salaries, wages and benefits 1,781 1,591 1,452 Capacity purchases from third-party regional carriers (1) 1,398 1,431 1,581 Maintenance, materials and repairs 403 340 281 Other rent and landing fees 651 610 625 Aircraft rent 29 32 35 Selling expenses 402 369 361 Depreciation and amortization 336 318 315 Special items, net 6 6 22 Other 626 593 492 Total regional expenses $ 7,501 $ 7,133 $ 6,546 (1) In 2019 , 2018 , and 2017 , we recognized $590 million , $565 million and $544 million , respectively, of expense under our capacity purchase agreement with Republic Airline Inc. (Republic). We hold a 25% equity interest in Republic Airways Holdings Inc. (Republic Holdings), the parent company of Republic.
American Airlines, Inc. [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Basis of Presentation and Summary of Significant Accounting Policies	Basis of Presentation and Summary of Significant Accounting Policies (a) Basis of Presentation American Airlines, Inc. (American) is a Delaware corporation whose primary business activity is the operation of a major network air carrier. American is the principal wholly-owned subsidiary of American Airlines Group Inc. (AAG), which owns all of American’s outstanding common stock, par value $1.00 per share. On December 9, 2013, a subsidiary of AMR Corporation (AMR) merged with and into US Airways Group, Inc. (US Airways Group), a Delaware corporation, which survived as a wholly-owned subsidiary of AAG, and AAG emerged from Chapter 11 (the Merger). Upon closing of the Merger and emergence from Chapter 11, AMR changed its name to American Airlines Group Inc. All significant intercompany transactions have been eliminated. The preparation of financial statements in accordance with accounting principles generally accepted in the United States (GAAP) requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, revenues and expenses, and the disclosure of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates. The most significant areas of judgment relate to passenger revenue recognition, impairment of goodwill, impairment of long-lived and intangible assets, the loyalty program, as well as pension and retiree medical and other postretirement benefits. (b) Recent Accounting Pronouncements ASU 2016-02: Leases (Topic 842) (the New Lease Standard) The New Lease Standard requires lessees to recognize a lease liability and a right-of-use (ROU) asset on the balance sheet for operating leases. Accounting for finance leases is substantially unchanged. The New Lease Standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. In the fourth quarter of 2018, American elected to early adopt the New Lease Standard as of January 1, 2018 using a modified retrospective transition, with the cumulative-effect adjustment to the opening balance of retained earnings as of the effective date (the effective date method). Under the effective date method, financial results reported in periods prior to 2018 are unchanged. American also elected the package of practical expedients, which among other things, does not require reassessment of lease classification. The adoption of the New Lease Standard had a significant impact on American’s consolidated balance sheet due to the recognition of approximately $10 billion of lease liabilities with corresponding right-of-use assets for operating leases. Additionally, American recognized a $197 million cumulative effect adjustment credit, net of tax, to retained earnings. The adjustment to retained earnings was driven principally by sale-leaseback transactions including the recognition of unamortized deferred aircraft sale-leaseback gains. Prior to the adoption of the New Lease Standard, gains on sale-leaseback transactions were generally deferred and recognized in the income statement over the lease term. Under the New Lease Standard, gains on sale-leaseback transactions (subject to adjustment for off-market terms) are recognized immediately. ASU 2018-02: Income Statement – Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income This ASU provides the option to reclassify stranded tax effects within accumulated other comprehensive income to retained earnings due to the U.S. federal corporate income tax rate change as a result of H.R. 1, the 2017 Tax Cuts and Jobs Act (the 2017 Tax Act). The amount of the reclassification is the difference between the amount initially charged or credited directly to other comprehensive income at the previous U.S. federal corporate income tax rate that remains in accumulated other comprehensive income and the amount that would have been charged or credited directly to other comprehensive income using the newly enacted U.S. federal corporate income tax rate, excluding the effect of any valuation allowance previously charged to income from continuing operations. This standard is effective for interim and annual reporting periods beginning after December 15, 2018. In the first quarter of 2019, American adopted this standard retrospectively as of December 22, 2017, the date the 2017 Tax Act was enacted, which resulted in the recast of prior reporting periods. As a result of the adoption, American reclassified $622 million of stranded tax effects principally related to its pension plans from accumulated other comprehensive loss to retained earnings. ASU 2016-13: Financial Instruments – Credit Losses (Topic 326) This ASU requires the use of an expected loss model for certain types of financial instruments and requires consideration of a broader range of reasonable and supportable information to calculate credit loss estimates. For trade receivables, loans and held-to - maturity debt securities, an estimate of lifetime expected credit losses is required. For available-for-sale debt securities, an allowance for credit losses will be required rather than a reduction to the carrying value of the asset. This standard is effective for interim and annual reporting periods beginning after December 15, 2019. While American has not completed its evaluation of the impact of adoption of this standard, American does not expect it to have a material impact on its consolidated financial statements. (c) Short-term Investments Short-term investments are classified as available-for-sale and stated at fair value. Realized gains and losses are recorded in nonoperating expense on American’s consolidated statements of operations. Unrealized gains and losses are recorded in accumulated other comprehensive loss on American’s consolidated balance sheets. (d) Restricted Cash and Short-term Investments American has restricted cash and short-term investments related primarily to collateral held to support workers’ compensation obligations. (e) Aircraft Fuel, Spare Parts and Supplies, Net Aircraft fuel is recorded on a first-in, first-out basis. Spare parts and supplies are recorded at average costs less an allowance for obsolescence. These items are expensed when used. (f) Operating Property and Equipment Operating property and equipment is recorded at cost and depreciated or amortized to residual values over the asset’s estimated useful life or the lease term, whichever is less, using the straight-line method. Residual values for aircraft, engines and related rotable parts are generally 5% to 10% of original cost. Costs of major improvements that enhance the usefulness of the asset are capitalized and depreciated or amortized over the estimated useful life of the asset or the lease term, whichever is less. The estimated useful lives for the principal property and equipment classifications are as follows: Principal Property and Equipment Classification Estimated Useful Life Aircraft, engines and related rotable parts 20 – 30 years Buildings and improvements 5 – 30 years Furniture, fixtures and other equipment 3 – 10 years Capitalized software 5 – 10 years American assesses impairment of operating property and equipment when events and circumstances indicate that the assets may be impaired. An asset or group of assets is considered impaired when the undiscounted cash flows estimated to be generated by the assets are less than the carrying amount of the assets and the net book value of the assets exceeds their estimated fair value. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets. Assets to be disposed of are reported at the lower of the carrying amount or fair value less the cost to sell. Total depreciation and amortization expense was $2.5 billion , $2.4 billion and $2.1 billion for the years ended December 31, 2019 , 2018 and 2017 , respectively. (g) Leases American determines if an arrangement is a lease at inception. Operating leases are included in operating lease right-of-use (ROU) assets, current operating lease liabilities and noncurrent operating lease liabilities in American’s consolidated balance sheet. Finance leases are included in property and equipment, current maturities of long-term debt and finance leases and long-term debt and finance leases, net of current maturities, in American’s consolidated balance sheets. ROU assets represent American’s right to use an underlying asset for the lease term and lease liabilities represent its obligation to make lease payments arising from the lease. ROU assets and liabilities are recognized at the lease commencement date based on the estimated present value of lease payments over the lease term. American uses its estimated incremental borrowing rate, which is derived from information available at the lease commencement date , in determining the present value of lease payments. American gives consideration to its recent debt issuances as well as publicly available data for instruments with similar characteristics when calculating its incremental borrowing rates. American’s lease term includes options to extend the lease when it is reasonably certain that it will exercise that option. Leases with a term of 12 months or less are not recorded on the balance sheet. American’s lease agreements do not contain any residual value guarantees. Under certain of American’s capacity purchase agreements with third-party regional carriers, American does not own the underlying aircraft. However, since American controls the marketing, scheduling, ticketing, pricing and seat inventories of these aircraft and therefore control the asset, the aircraft is deemed to be leased for accounting purposes. For these capacity purchase agreements, American accounts for the lease and non-lease components separately. The lease component consists of the aircraft and the non-lease components consist of services, such as the crew and maintenance. American allocates the consideration in the capacity purchase agreements to the lease and non-lease components using their estimated relative standalone prices. See Note 10(b) for additional information on its capacity purchase agreements . For real estate, American accounts for the lease and non-lease components as a single lease component. (h) Income Taxes Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are recorded net as noncurrent deferred income taxes. American provides a valuation allowance for its deferred tax assets when it is more likely than not that some portion, or all of its deferred tax assets, will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income. American considers all available positive and negative evidence and makes certain assumptions in evaluating the realizability of its deferred tax assets. Many factors are considered that impact American’s assessment of future profitability, including conditions which are beyond American’s control, such as the health of the economy, the availability and price volatility of aircraft fuel and travel demand. (i) Goodwill Goodwill represents the excess of the purchase price over the fair value of the net assets acquired and liabilities assumed. Goodwill is not amortized but assessed for impairment annually on October 1 or more frequently if events or circumstances indicate that goodwill may be impaired. American has one consolidated reporting unit. Goodwill is assessed for impairment by initially performing a qualitative assessment and, if necessary, then comparing the fair value of the reporting unit to its carrying value, including goodwill. If the fair value of the reporting unit is less than the carrying value, a second step is performed to determine the implied fair value of goodwill. If the implied fair value of goodwill is lower than its carrying value, an impairment charge equal to the difference is recorded. Based upon American’s annual assessment, there was no goodwill impairment in 2019 . The carrying value of the goodwill on American’s consolidated balance sheets was $4.1 billion as of December 31, 2019 and 2018 . (j) Other Intangibles, Net Intangible assets consist primarily of domestic airport slots, customer relationships, marketing agreements, international slots and route authorities, airport gate leasehold rights and tradenames. Definite-Lived Intangible Assets Definite-lived intangible assets are amortized over their respective estimated useful lives and reviewed for impairment whenever events or changes in circumstances indicate that the carrying value may not be recoverable. The following table provides information relating to American’s amortizable intangible assets as of December 31, 2019 and 2018 (in millions): December 31, 2019 2018 Domestic airport slots $ 365 $ 365 Customer relationships 300 300 Marketing agreements 105 105 Tradenames 35 35 Airport gate leasehold rights 137 137 Accumulated amortization (704 ) (663 ) Total $ 238 $ 279 Certain domestic airport slots and airport gate leasehold rights are amortized on a straight-line basis over 25 years . The customer relationships and marketing agreements were identified as intangible assets subject to amortization and are amortized on a straight-line basis over approximately nine years and 30 years , respectively. Tradenames are fully amortized. American recorded amortization expense related to these intangible assets of $41 million for both years ended December 31, 2019 and 2018 and $44 million for 2017 . American expects to record annual amortization expense for these intangible assets as follows (in millions): 2020 $ 41 2021 41 2022 41 2023 7 2024 7 2025 and thereafter 101 Total $ 238 Indefinite-Lived Intangible Assets Indefinite-lived intangible assets include certain domestic airport slots and international slots and route authorities. Indefinite-lived intangible assets are not amortized but instead are assessed for impairment annually on October 1 or more frequently if events or circumstances indicate that the asset may be impaired. As of December 31, 2019 and 2018 , American had $1.8 billion and $1.9 billion , respectively, of indefinite-lived intangible assets on its consolidated balance sheets. Indefinite-lived intangible assets are assessed for impairment by initially performing a qualitative assessment to determine whether American believes it is more likely than not that an asset has been impaired. If American believes impairment has occurred, American then evaluates for impairment by comparing the estimated fair value of assets to the carrying value. An impairment charge is recognized if the asset’s estimated fair value is less than its carrying value. Based upon American’s annual assessment, there were no material indefinite-lived intangible asset impairments in 2019 . (k) Revenue Recognition Revenue The following are the significant categories comprising American’s reported operating revenues (in millions): Year Ended December 31, 2019 2018 2017 Passenger revenue: Passenger travel $ 38,831 $ 37,457 $ 36,152 Loyalty revenue - travel (1) 3,179 3,219 2,979 Total passenger revenue 42,010 40,676 39,131 Cargo 863 1,013 890 Other: Loyalty revenue - marketing services 2,361 2,352 2,124 Other revenue 527 489 465 Total other revenue 2,888 2,841 2,589 Total operating revenues $ 45,761 $ 44,530 $ 42,610 (1) Loyalty revenue included in passenger revenue is principally comprised of mileage credit redemptions earned through travel or from co-branded credit card and other partners. See “ Loyalty Revenue” below for further discussion on these mileage credits. The following is American’s total passenger revenue by geographic region (in millions): Year Ended December 31, 2019 2018 2017 Domestic $ 30,881 $ 29,573 $ 28,749 Latin America 5,047 5,125 4,840 Atlantic 4,624 4,376 4,028 Pacific 1,458 1,602 1,514 Total passenger revenue $ 42,010 $ 40,676 $ 39,131 American attributes passenger revenue by geographic region based upon the origin and destination of each flight segment. Passenger Revenue American recognizes all revenues generated from transportation on American and its regional flights operated under the brand name American Eagle, including associated baggage fees, ticketing change fees and other inflight services, as passenger revenue when transportation is provided. Ticket and other related sales for transportation that has not yet been provided are initially deferred and recorded as air traffic liability on American’s consolidated balance sheets. The air traffic liability principally represents tickets sold for future travel on American and partner airlines, as well as estimated future refunds and exchanges of tickets sold for past travel. The majority of tickets sold are nonrefundable. A small percentage of tickets, some of which are partially used tickets, expire unused. Due to complex pricing structures, refund and exchange policies, and interline agreements with other airlines, certain amounts are recognized in passenger revenue using estimates regarding both the timing of the revenue recognition and the amount of revenue to be recognized. These estimates are generally based on the analysis of American’s historical data. American has consistently applied this accounting method to estimate revenue from unused tickets at the date of travel. Estimated future refunds and exchanges included in the air traffic liability are routinely evaluated based on subsequent activity to validate the accuracy of American’s estimates. Any adjustments resulting from periodic evaluations of the estimated air traffic liability are included in passenger revenue during the period in which the evaluations are completed. Various taxes and fees assessed on the sale of tickets to end customers are collected by American as an agent and remitted to taxing authorities. These taxes and fees have been presented on a net basis in the accompanying consolidated statements of operations and recorded as a liability until remitted to the appropriate taxing authority. Loyalty Revenue American currently operates the loyalty program, AAdvantage. This program awards mileage credits to passengers who fly on American, any one world airline or other partner airlines, or by using the services of other program participants, such as the Citi and Barclaycard US co-branded credit cards, and certain hotels and car rental companies. Mileage credits can be redeemed for travel on American and other participating partner airlines, as well as other non-air travel awards such as hotels and rental cars. For mileage credits earned by AAdvantage loyalty program members, American applies the deferred revenue method. Mileage credits earned through travel For mileage credits earned through travel, American applies a relative selling price approach whereby the total amount collected from each passenger ticket sale is allocated between the air transportation and the mileage credits earned. The portion of each passenger ticket sale attributable to mileage credits earned is initially deferred and then recognized in passenger revenue when mileage credits are redeemed and transportation is provided. The estimated selling price of mileage credits is determined using an equivalent ticket value approach, which uses historical data, including award redemption patterns by geographic region and class of service, as well as similar fares as those used to settle award redemptions. The estimated selling price of miles is adjusted for an estimate of miles that will not be redeemed based on historical redemption patterns. Mileage credits sold to co-branded credit cards and other partners American sells mileage credits to participating airline partners and non-airline business partners, including American’s co-branded credit card partners, under contracts with terms extending generally for one to seven years. Consideration received from the sale of mileage credits is variable and payment terms typically are within 30 days subsequent to the month of mileage sale. Sales of mileage credits to non-airline business partners are comprised of two components, transportation and marketing. American allocates the consideration received from these sales of mileage credits based on the relative selling price of each product or service delivered. American’s most significant partner agreements are its co-branded credit card agreements with Citi and Barclaycard US that American entered into in 2016. American identified the following revenue elements in these co-branded credit card agreements: the transportation component; and the use of intellectual property, including the American brand and access to loyalty program member lists, which is the predominant element in the agreements, as well as advertising (collectively, the marketing component). Accordingly, American recognizes the marketing component in other revenue in the period of the mileage sale following the sales-based royalty method. The transportation component represents the estimated selling price of future travel awards and is determined using the same equivalent ticket value approach described above. The portion of each mileage credit sold attributable to transportation is initially deferred and then recognized in passenger revenue when mileage credits are redeemed and transportation is provided. For the portion of American’s outstanding mileage credits that it estimates will not be redeemed, American recognizes the associated value proportionally as the remaining mileage credits are redeemed. American’s estimates are based on analysis of historical redemptions. Cargo Revenue Cargo revenue is recognized when American provides the transportation. Other Revenue Other revenue includes revenue associated with American’s loyalty program, which is comprised principally of the marketing component of mileage sales to co-branded credit card and other partners and other marketing related payments. Loyalty revenue included in other revenue was $2.4 billion for both years ended December 31, 2019 and 2018 and $2.1 billion for 2017 . The accounting and recognition for the loyalty program marketing services are discussed above in “ Loyalty Revenue .” The remaining amounts included within other revenue relate to airport clubs, advertising and vacation-related services. Contract Balances American’s significant contract liabilities are comprised of (1) outstanding loyalty program mileage credits that may be redeemed for future travel and other non-air travel awards, reported as loyalty program liability on American’s consolidated balance sheets and (2) ticket sales for transportation that has not yet been provided, reported as air traffic liability on American’s consolidated balance sheets. December 31, 2019 2018 (in millions) Loyalty program liability $ 8,615 $ 8,539 Air traffic liability 4,808 4,339 Total $ 13,423 $ 12,878 The balance of the loyalty program liability fluctuates based on seasonal patterns, which impact the volume of mileage credits issued through travel or sold to co-branded credit card and other partners (deferral of revenue) and mileage credits redeemed (recognition of revenue). Changes in loyalty program liability are as follows (in millions): Balance at December 31, 2018 $ 8,539 Deferral of revenue 3,438 Recognition of revenue (1) (3,362 ) Balance at December 31, 2019 (2) $ 8,615 (1) Principally relates to revenue recognized from the redemption of mileage credits for both air and non-air travel awards. Mileage credits are combined in one homogenous pool and are not separately identifiable. As such, the revenue is comprised of miles that were part of the loyalty program deferred revenue balance at the beginning of the period, as well as miles that were issued during the period. (2) Mileage credits can be redeemed at any time and do not expire as long as that AAdvantage member has any type of qualifying activity at least every 18 months . As of December 31, 2019 , American’s current loyalty program liability was $3.2 billion and represents American’s current estimate of revenue expected to be recognized in the next 12 months based on historical trends, with the balance reflected in long-term loyalty program liability expected to be recognized as revenue in periods thereafter. The air traffic liability principally represents tickets sold for future travel on American and partner airlines, as well as estimated future refunds and exchanges of tickets sold for past travel. The balance in American’s air traffic liability also fluctuates with seasonal travel patterns. The contract duration of passenger tickets is one year . Accordingly, any revenue associated with tickets sold for future travel will be recognized within 12 months. For 2019 , $3.3 billion of revenue was recognized in passenger revenue that was included in American’s air traffic liability at December 31, 2018 . With respect to contract receivables, reflected as accounts receivable, net on the accompanying consolidated balance sheets, these primarily include receivables for tickets sold to individual passengers through the use of major credit cards. These receivables are short-term, mostly settled within seven days after sale. Bad debt losses, which have been minimal in the past, have been considered in establishing allowances for doubtful accounts. (l) Maintenance, Materials and Repairs Maintenance and repair costs for owned and leased flight equipment are charged to operating expense as incurred, except costs incurred for maintenance and repair under flight hour maintenance contract agreements, which are accrued based on contractual terms when an obligation exists. (m) Selling Expenses Selling expenses include credit card fees, commissions, computerized reservations systems fees and advertising. Selling expenses associated with passenger revenue are expensed when the transportation or service is provided. Advertising costs are expensed as incurred. Advertising expense was $129 million , $128 million and $135 million for the years ended December 31, 2019 , 2018 and 2017 , respectively. (n) Share-based Compensation American accounts for its share-based compensation expense based on the fair value of the stock award at the time of grant, which is recognized ratably over the vesting period of the stock award. The majority of American’s stock awards are time vested restricted stock units, and the fair value of such awards is based on the market price of the underlying shares of AAG common stock on the date of grant. See Note 13 for further discussion of share-based compensation. (o) Foreign Currency Gains and Losses Foreign currency gains and losses are recorded as part of other income, net within total nonoperating expense, net in American’s consolidated statements of operations. For the years ended December 31, 2019 , 2018 and 2017 , respectively, foreign currency losses were $32 million , $54 million and $4 million . (p) Other Operating Expenses Other operating expenses includes costs associated with ground and cargo handling, crew travel, aircraft food and catering, passenger accommodation, airport security, international navigation fees and certain general and administrative expenses. (q) Regional Expenses Expenses associated with American Eagle operations are classified as regional expenses on American’s consolidated statements of operations. Regional expenses consist of the following (in millions): Year Ended December 31, 2019 2018 2017 Aircraft fuel and related taxes $ 1,869 $ 1,843 $ 1,382 Salaries, wages and benefits 325 338 356 Capacity purchases from third-party regional carriers (1) 3,562 3,267 3,283 Maintenance, materials and repairs 30 8 7 Other rent and landing fees 621 583 602 Aircraft rent 29 27 27 Selling expenses 402 369 361 Depreciation and amortization 286 267 262 Special items, net — — 3 Other 394 362 289 Total regional expenses $ 7,518 $ 7,064 $ 6,572 (1) In 2019 , 2018 , and 2017 , American recognized $590 million , $565 million and $544 million , respectively, of expense under its capacity purchase agreement with Republic Airline Inc. (Republic). American holds a 25% equity interest in Republic Airways Holdings Inc. (Republic Holdings), the parent company of Republic.

Special Items, Net

Special Items, Net	12 Months Ended
	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Special Items, Net	Special Items, Net Special items, net on our consolidated statements of operations consisted of the following (in millions): Year Ended December 31, 2019 2018 2017 Fleet restructuring expenses (1) $ 271 $ 422 $ 232 Fleet impairment (2) 213 — — Merger integration expenses (3) 191 268 273 Litigation reserve adjustments (53 ) 45 — Mark-to-market adjustments on bankruptcy obligations, net (4) (11 ) (76 ) 27 Severance expenses (5) 11 58 — Intangible asset impairment (6) — 26 — Labor contract expenses — 13 46 Employee 2017 Tax Act bonus expense (7) — — 123 Other operating charges, net 13 31 11 Mainline operating special items, net 635 787 712 Regional operating special items, net 6 6 22 Operating special items, net 641 793 734 Debt refinancing and extinguishment charges 16 13 22 Mark-to-market adjustments on equity and other investments, net (8) (5 ) 104 — Other nonoperating income, net (8 ) (4 ) — Nonoperating special items, net 3 113 22 Income tax special items (9) — 18 — Impact of the 2017 Tax Act (10) — — 823 Income tax special items, net — 18 823 (1) Fleet restructuring expenses principally included accelerated depreciation and rent expense for aircraft and related equipment grounded or expected to be grounded earlier than planned. (2) Fleet impairment principally includes a non-cash write-down of aircraft related to the planned retirement of our Embraer E190 fleet. (3) Merger integration expenses included costs associated with integration projects, principally our technical operations, flight attendant, human resources and payroll systems. (4) Bankruptcy obligations that will be settled in shares of our common stock are marked-to-market based on our stock price. (5) Severance expenses primarily included costs associated with reductions of management and support staff team members. (6) Intangible asset impairment includes a non-cash charge to write-off our Brazil route authority as a result of the U.S.-Brazil open skies agreement. (7) Employee bonus expense included costs related to the $1,000 cash bonus and associated payroll taxes granted to mainline employees in recognition of the 2017 Tax Act. (8) Mark-to-market adjustments on equity and other investments, net primarily relates to net unrealized gains and losses associated with our equity investment in China Southern Airlines Company Limited (China Southern Airlines). (9) Income tax special items for 2018 included an $18 million charge related to an international income tax matter. (10) Impact of the 2017 Tax Act includes an $823 million non-cash charge to income tax expense to reflect the impact of lower corporate income tax rates on our deferred tax asset and liabilities resulting from the 2017 Tax Act, which reduced the federal corporate income tax rate from 35% to 21%.
American Airlines, Inc. [Member]
Restructuring Cost and Reserve [Line Items]
Special Items, Net	Special Items, Net Special items, net on American’s consolidated statements of operations consisted of the following (in millions): Year Ended December 31, 2019 2018 2017 Fleet restructuring expenses (1) $ 271 $ 422 $ 232 Fleet impairment (2) 213 — — Merger integration expenses (3) 191 268 273 Litigation reserve adjustments (53 ) 45 — Mark-to-market adjustments on bankruptcy obligations, net (4) (11 ) (76 ) 27 Severance expenses (5) 11 58 — Intangible asset impairment (6) — 26 — Labor contract expenses — 13 46 Employee 2017 Tax Act bonus expense (7) — — 123 Other operating charges, net 13 31 11 Mainline operating special items, net 635 787 712 Regional operating special items, net — — 3 Operating special items, net 635 787 715 Debt refinancing and extinguishment charges 16 13 22 Mark-to-market adjustments on equity and other investments, net (8) (5 ) 104 — Other nonoperating income, net — (4 ) — Nonoperating special items, net 11 113 22 Income tax special items (9) — 18 — Impact of the 2017 Tax Act (10) — — 924 Income tax special items, net — 18 924 (1) Fleet restructuring expenses principally included accelerated depreciation and rent expense for aircraft and related equipment grounded or expected to be grounded earlier than planned. (2) Fleet impairment principally includes a non-cash write-down of aircraft related to the planned retirement of American’s Embraer E190 fleet. (3) Merger integration expenses included costs associated with integration projects, principally American's technical operations, flight attendant, human resources and payroll systems. (4) Bankruptcy obligations that will be settled in shares of AAG common stock are marked-to-market based on AAG’s stock price. (5) Severance expenses primarily included costs associated with reductions of management and support staff team members. (6) Intangible asset impairment includes a non-cash charge to write-off American’s Brazil route authority as a result of the U.S.-Brazil open skies agreement. (7) Employee bonus expense included costs related to the $1,000 cash bonus and associated payroll taxes granted to mainline employees in recognition of the 2017 Tax Act. (8) Mark-to-market adjustments on equity and other investments, net primarily relates to net unrealized gains and losses associated with American’s equity investment in China Southern Airlines Company Limited (China Southern Airlines). (9) Income tax special items for 2018 included an $18 million charge related to an international income tax matter. (10) Impact of the 2017 Tax Act includes a $924 million non-cash charge to income tax expense to reflect the impact of lower corporate income tax rates on the Company’s deferred tax asset and liabilities resulting from the 2017 Tax Act, which reduced the federal corporate income tax rate from 35% to 21%.

Earnings Per Common Share

Earnings Per Common Share	12 Months Ended
	Dec. 31, 2019
Earnings Per Share [Abstract]
Earnings Per Common Share	Earnings Per Common Share The following table sets forth the computation of basic and diluted earnings per common share (EPS) (in millions, except share and per share amounts): Year Ended December 31, 2019 2018 2017 Basic EPS: Net income $ 1,686 $ 1,412 $ 1,282 Weighted average common shares outstanding (in thousands) 443,363 464,236 489,164 Basic EPS $ 3.80 $ 3.04 $ 2.62 Diluted EPS: Net income for purposes of computing diluted EPS $ 1,686 $ 1,412 $ 1,282 Share computation for diluted EPS (in thousands): Basic weighted average common shares outstanding 443,363 464,236 489,164 Dilutive effect of stock awards 906 1,424 2,528 Diluted weighted average common shares outstanding 444,269 465,660 491,692 Diluted EPS $ 3.79 $ 3.03 $ 2.61 Restricted stock unit awards excluded from the calculation of diluted EPS because inclusion would be antidilutive (in thousands) 2,520 1,266 328

Share Repurchase Programs and D

Share Repurchase Programs and Dividends	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Share Repurchase Programs and Dividends	Share Repurchase Programs and Dividends In April 2018, we announced that our Board of Directors authorized a $2.0 billion share repurchase program that will expire on December 31, 2020. Since July 2014, our Board of Directors has approved seven share repurchase programs aggregating $13.0 billion of authority. As of December 31, 2019 , there was $565 million of remaining authority to repurchase shares under our current $2.0 billion share repurchase program. Share repurchases under our repurchase programs may be made through a variety of methods, which may include open market purchases, privately negotiated transactions, block trades or accelerated share repurchase transactions. Any such repurchases that may be made from time to time will be subject to market and economic conditions, applicable legal requirements and other relevant factors. We are not obligated to repurchase any specific number of shares and our repurchase of AAG common stock may be limited, suspended or discontinued at any time at our discretion and without prior notice. In 2019 , we repurchased 33.8 million shares of AAG common stock for $1.1 billion at a weighted average cost per share of $32.09 . In 2018 , we repurchased 16.6 million shares of AAG common stock for $800 million at a weighted average cost per share of $48.15 . In 2017 , we repurchased 33.9 million shares of AAG common stock for $1.6 billion at a weighted average cost per share of $45.68 . Since the inception of our share repurchase programs in July 2014 through December 31, 2019, we have repurchased 312.7 million shares of AAG common stock for $12.4 billion at a weighted average cost per share of $39.76 . Our Board of Directors declared quarterly cash dividends of $0.10 per share totaling $178 million , $186 million and $198 million for 2019 , 2018 and 2017 , respectively.

Debt

Debt	12 Months Ended
	Dec. 31, 2019
Debt Instrument [Line Items]
Debt	Debt Long-term debt included on our consolidated balance sheets consisted of (in millions): December 31, 2019 2018 Secured 2013 Credit Facilities, variable interest rate of 3.54%, installments through 2025 (a) $ 1,807 $ 1,825 2014 Credit Facilities, variable interest rate of 3.72%, installments through 2021 (a) 1,202 1,215 April 2016 Credit Facilities, variable interest rate of 3.80%, installments through 2023 (a) 970 980 December 2016 Credit Facilities, variable interest rate of 3.74%, installments through 2023 (a) 1,213 1,225 Enhanced equipment trust certificates (EETCs), fixed interest rates ranging from 3.00% to 8.39%, averaging 4.05%, maturing from 2020 to 2032 (b) 11,933 11,648 Equipment loans and other notes payable, fixed and variable interest rates ranging from 2.99% to 7.31%, averaging 3.45%, maturing from 2020 to 2031 (c) 4,727 5,060 Special facility revenue bonds, fixed interest rates ranging from 5.00% to 8.00%, maturing from 2020 to 2031 754 798 22,606 22,751 Unsecured 4.625% senior notes, interest only payments until due in March 2020 (d) 500 500 5.000% senior notes, interest only payments until due in June 2022 (d) 750 — 5.50% senior notes — 750 1,250 1,250 Total long-term debt 23,856 24,001 Less: Total unamortized debt discount, premium and issuance costs 211 222 Less: Current maturities 2,749 3,213 Long-term debt, net of current maturities $ 20,896 $ 20,566 The table below shows the maximum availability under revolving credit facilities, all of which were undrawn, as of December 31, 2019 (in millions): 2013 Revolving Facility $ 750 2014 Revolving Facility 1,643 April 2016 Revolving Facility 450 Other Short-term Revolving Facility 400 Total $ 3,243 Secured financings are collateralized by assets, primarily aircraft, engines, simulators, aircraft spare parts, airport gate leasehold rights, route authorities, airport slots and certain pre-delivery payments. At December 31, 2019 , the maturities of long-term debt are as follows (in millions): 2020 $ 2,798 2021 3,510 2022 2,303 2023 4,074 2024 1,523 2025 and thereafter 9,648 Total $ 23,856 (a) 2013, 2014, April 2016 and December 2016 Credit Facilities 2013 Credit Facilities In November 2019, American and AAG entered into the Sixth Amendment to Amended and Restated Credit and Guaranty Agreement, amending the Amended and Restated Credit and Guaranty Agreement dated as of May 21, 2015 (as previously amended, the 2013 Credit Agreement; the revolving credit facility established thereunder, the 2013 Revolving Facility; the term loan facility established thereunder, the 2013 Term Loan Facility; and the 2013 Revolving Facility together with the 2013 Term Loan Facility, the 2013 Credit Facilities), which reduced the total aggregate commitments under the 2013 Revolving Facility to $750 million from $1.0 billion . In addition, certain lenders party to the 2013 Credit Agreement extended the maturity date of their commitments under the 2013 Revolving Facility to October 2024 from October 2023. 2014 Credit Facilities In November 2019, American and AAG entered into the Seventh Amendment to Amended and Restated Credit and Guaranty Agreement, amending the Amended and Restated Credit and Guaranty Agreement dated as of April 20, 2015 (as previously amended, the 2014 Credit Agreement; the revolving credit facility established thereunder, the 2014 Revolving Facility; the term loan facility established thereunder, the 2014 Term Loan Facility; and the 2014 Revolving Facility together with the 2014 Term Loan Facility, the 2014 Credit Facilities), which increased the total aggregate commitments under the 2014 Revolving Facility to $1.6 billion from $1.5 billion . In addition, certain lenders party to the 2014 Credit Agreement extended the maturity date of their commitments under the 2014 Revolving Facility to October 2024 from October 2023. April 2016 Credit Facilities In November 2019, American and AAG entered into the Fifth Amendment to Credit and Guaranty Agreement, amending the Credit and Guaranty Agreement dated as of April 29, 2016 (as previously amended, April 2016 Credit Agreement; the revolving credit facility established thereunder, the April 2016 Revolving Facility; the term loan facility established thereunder, the 2016 Term Loan Facility; and the April 2016 Revolving Facility together with the 2016 Term Loan Facility, the April 2016 Credit Facilities), which increased the total aggregate commitments under the April 2016 Revolving Facility to $450 million from $300 million . In addition, certain lenders party to the April 2016 Credit Agreement extended the maturity date of their commitments under the April 2016 Revolving Facility to October 2024 from October 2023. December 2016 Credit Facilities In December 2016, American and AAG entered into the Amended and Restated Credit and Guaranty Agreement, dated as of December 15, 2016 (as amended, the December 2016 Credit Agreement; the term loan facility established thereunder, the December 2016 Term Loan Facility; and together with the revolving credit facility that may be established thereunder in the future, the December 2016 Credit Facilities). Certain details of our 2013 Credit Facilities, 2014 Credit Facilities, April 2016 Credit Facilities and December 2016 Credit Facilities (collectively referred to as the Credit Facilities) are shown in the table below as of December 31, 2019 : 2013 Credit Facilities 2014 Credit Facilities April 2016 Credit Facilities December 2016 Credit Facilities 2013 Replacement Term Loan 2013 2014 Term Loan 2014 April 2016 Term Loan April 2016 December 2016 Term Loan Aggregate principal issued or credit facility availability (in millions) $1,919 $750 $1,250 $1,643 $1,000 $450 $1,250 Principal outstanding or drawn (in millions) $1,807 $— $1,202 $— $970 $— $1,213 Maturity date June 2025 October 2024 October 2021 October 2024 April 2023 October 2024 December 2023 LIBOR margin 1.75% 2.00% 2.00% 2.00% 2.00% 2.00% 2.00% The term loans under each of the Credit Facilities are repayable in annual installments in an amount equal to 1.00% of the aggregate principal amount issued, with any unpaid balance due on the respective maturity dates. Voluntary prepayments may be made by American at any time. The 2013 Revolving Facility, 2014 Revolving Facility and April 2016 Revolving Facility provide that American may from time to time borrow, repay and reborrow loans thereunder. The 2013 Revolving Facility and 2014 Revolving Facility have the ability to issue letters of credit thereunder in an aggregate amount outstanding at any time up to $100 million and $200 million , respectively. The 2013 Revolving Facility, 2014 Revolving Facility and April 2016 Revolving Facility are each subject to an undrawn annual fee of 0.63% . As of December 31, 2019 , there were no borrowings or letters of credit outstanding under the 2013 Revolving Facility, 2014 Revolving Facility or April 2016 Revolving Facility. The December 2016 Credit Facilities provide for a revolving credit facility that may be established thereunder in the future. Subject to certain limitations and exceptions, the Credit Facilities are secured by collateral, including certain spare parts, slots, route authorities, simulators and leasehold rights. American has the ability to make future modifications to the collateral pledged, subject to certain restrictions. American’s obligations under the Credit Facilities are guaranteed by AAG. American is required to maintain a certain minimum ratio of appraised value of the collateral to the outstanding loans as further described below in “Collateral-Related Covenants.” The Credit Facilities contain events of default customary for similar financings, including cross default to other material indebtedness. Upon the occurrence of an event of default, the outstanding obligations may be accelerated and become due and payable immediately. In addition, if a “change of control” occurs, American will (absent an amendment or waiver) be required to repay at par the loans outstanding under the Credit Facilities and terminate the 2013 Revolving Facility, 2014 Revolving Facility and April 2016 Revolving Facility and any revolving credit facility established under the December 2016 Credit Facilities. The Credit Facilities also include covenants that, among other things, require AAG to maintain a minimum aggregate liquidity (as defined in the Credit Facilities) of not less than $2.0 billion and limit the ability of AAG and its restricted subsidiaries to pay dividends and make certain other payments, make certain investments, incur additional indebtedness, incur liens on the collateral, dispose of the collateral, enter into certain affiliate transactions and engage in certain business activities, in each case subject to certain exceptions. In December 2019, due to uncertainty surrounding the timing of the Boeing 737 MAX aircraft return to service, American entered into an additional short-term revolving line of credit to provide us with incremental borrowing capacity of up to $400 million . We have no present intention to borrow any amounts under this facility, which matures in September 2020 with an optional extension to December 2020. (b) EETCs 2019-1 Aircraft EETCs In August 2019, American created three pass-through trusts which issued approximately $1.1 billion aggregate face amount of Series 2019-1 Class AA, Class A and Class B EETCs (the 2019-1 Aircraft EETCs) in connection with the financing of 35 aircraft previously delivered or to be delivered to American through September 2020 (the 2019-1 Aircraft). As of December 31, 2019 , approximately $804 million of the proceeds had been used to purchase equipment notes issued by American in connection with financing 28 aircraft under the 2019-1 Aircraft EETCs, of which $608 million was used to repay existing indebtedness. Interest and principal payments on equipment notes issued in connection with the 2019-1 Aircraft EETCs are payable semi-annually in February and August of each year, with interest payments scheduled to begin in February 2020 and with principal payments scheduled to begin (i) in the case of equipment notes with respect to any 2019-1 Aircraft owned by American at the time of issuance of the 2019-1 Aircraft EETCs, in February 2020 and (ii) in the case of equipment notes with respect to the Embraer E175 aircraft and the Airbus A321neo aircraft scheduled to be delivered after the issuance of the 2019-1 Aircraft EETCs, in August 2020 and August 2021, respectively. The remaining proceeds of approximately $293 million as of December 31, 2019 were being held in escrow with a depositary for the benefit of the holders of the 2019-1 Aircraft EETCs until such time as American issues additional equipment notes with respect to the remaining 2019-1 Aircraft to the pass-through trusts, which will purchase such additional equipment notes with the escrowed funds. These escrowed funds are not guaranteed by American and are not reported as debt on its condensed consolidated balance sheet because the proceeds held by the depositary for the benefit of the holders of the 2019-1 Aircraft EETCs are not American’s assets. Certain information regarding the 2019-1 Aircraft EETC equipment notes and remaining escrowed proceeds, as of December 31, 2019 , is set forth in the table below. 2019-1 Aircraft EETCs Series AA Series A Series B Aggregate principal issued $579 million $289 million $229 million Remaining escrowed proceeds $155 million $77 million $61 million Fixed interest rate per annum 3.15% 3.50% 3.85% Maturity date February 2032 February 2032 February 2028 2019-1 Engine EETCs In June 2019 , American created pass-through trusts which issued $650 million in aggregate face amount of 2019-1 Engine EETCs (the 2019-1 Engine EETCs), with maturities from June 2022 to June 2026. All of the proceeds received by such pass-through trusts from the sale of the 2019-1 Engine EETCs have been used to acquire equipment notes issued by American to the pass-through trusts. The pass-through trust certificates represent the right to payment under the equipment notes that are full-recourse obligations of American and such equipment notes are secured by spare aircraft engines currently owned and operated by American. (c) Equipment Loans and Other Notes Payable Issued in 2019 In 2019 , American entered into agreements under which it borrowed $1.7 billion in connection with the financing or refinancing, as the case may be, of certain aircraft and other flight equipment, of which $643 million was used to repay existing indebtedness. Debt incurred under these agreements matures in 2023 through 2031 and bears interest at variable rates (comprised of LIBOR plus an applicable margin) averaging 3.37% at December 31, 2019 . (d) Senior Notes In May 2019, AAG issued $750 million aggregate principal amount of 5.000% senior notes due 2022 (the 5.000% senior notes). These notes bear interest at a rate of 5.000% per annum, payable semi-annually in arrears on June 1 and December 1 of each year, beginning on December 1, 2019. The 5.000% senior notes mature on June 1, 2022. The details of our 4.625% and 5.000% senior notes are shown in the table below as of December 31, 2019 : 4.625% Senior Notes 5.000% Senior Notes Aggregate principal issued and outstanding $500 million $750 million Maturity date March 2020 June 2022 Fixed interest rate per annum 4.625% 5.000% Interest payments Semi-annually in arrears in March and September Semi-annually in arrears in June and December The 4.625% and 5.000% senior notes are senior unsecured obligations of AAG. These senior notes are fully and unconditionally guaranteed by American. The indentures for these senior notes contain covenants and events of default generally customary for similar financings. In addition, if we experience specific kinds of changes of control, we must offer to repurchase these senior notes in whole or in part at a price of 101% of the principal amount plus accrued and unpaid interest, if any, to (but not including) the repurchase date. Upon the occurrence of certain events of default, these senior notes may be accelerated and become due and payable. Guarantees As of December 31, 2019 , AAG had issued guarantees covering approximately $725 million of American’s special facility revenue bonds (and interest thereon) and $8.1 billion of American’s secured debt (and interest thereon), including the Credit Facilities and certain EETC financings. Collateral-Related Covenants Certain of our debt financing agreements (including our term loans, revolving credit facilities and spare engine EETCs) contain loan to value (LTV) ratio covenants and require us to appraise the related collateral annually. Pursuant to such agreements, if the LTV ratio exceeds a specified threshold or if the value of the appraised collateral fails to meet a specified threshold, as the case may be, we are required, as applicable, to pledge additional qualifying collateral (which in some cases may include cash or investment securities), or pay down such financing, in whole or in part. Specifically, we are required to meet certain collateral coverage tests on an annual basis for our Credit Facilities, as described below: 2013 Credit Facilities 2014 Credit Facilities April 2016 Credit Facilities December 2016 Credit Facilities Frequency of Appraisals of Appraised Collateral Annual Annual Annual Annual LTV Requirement 1.6x Collateral valuation to amount of debt outstanding (62.5% LTV) 1.6x Collateral valuation to amount of debt outstanding (62.5% LTV) 1.6x Collateral valuation to amount of debt outstanding (62.5% LTV) 1.6x Collateral valuation to amount of debt outstanding (62.5% LTV) LTV as of Last Measurement Date 36.2% 17.7% 36.2% 53.6% Collateral Description Generally, certain slots, route authorities and airport gate leasehold rights used by American to operate all services between the U.S. and South America Generally, certain slots, route authorities and airport gate leasehold rights used by American to operate certain services between the U.S. and European Union (including London Heathrow) Generally, certain spare parts Generally, certain Ronald Reagan Washington National Airport (DCA) slots, certain La Guardia Airport (LGA) slots, certain simulators and certain leasehold rights At December 31, 2019 , we were in compliance with the applicable collateral coverage tests as of the most recent measurement dates.
American Airlines, Inc. [Member]
Debt Instrument [Line Items]
Debt	Debt Long-term debt included on American’s consolidated balance sheets consisted of (in millions): December 31, 2019 2018 Secured 2013 Credit Facilities, variable interest rate of 3.54%, installments through 2025 (a) $ 1,807 $ 1,825 2014 Credit Facilities, variable interest rate of 3.72%, installments through 2021 (a) 1,202 1,215 April 2016 Credit Facilities, variable interest rate of 3.80%, installments through 2023 (a) 970 980 December 2016 Credit Facilities, variable interest rate of 3.74%, installments through 2023 (a) 1,213 1,225 Enhanced equipment trust certificates (EETCs), fixed interest rates ranging from 3.00% to 8.39%, averaging 4.05%, maturing from 2020 to 2032 (b) 11,933 11,648 Equipment loans and other notes payable, fixed and variable interest rates ranging from 2.99% to 7.31%, averaging 3.45%, maturing from 2020 to 2031 (c) 4,727 5,060 Special facility revenue bonds, fixed interest rates of 5.00%, maturing from 2020 to 2031 725 769 Total long-term debt 22,577 22,722 Less: Total unamortized debt discount, premium and issuance costs 205 219 Less: Current maturities 2,246 2,466 Long-term debt, net of current maturities $ 20,126 $ 20,037 The table below shows the maximum availability under revolving credit facilities, all of which were undrawn, as of December 31, 2019 (in millions): 2013 Revolving Facility $ 750 2014 Revolving Facility 1,643 April 2016 Revolving Facility 450 Other Short-term Revolving Facility 400 Total $ 3,243 Secured financings are collateralized by assets, primarily aircraft, engines, simulators, aircraft spare parts, airport gate leasehold rights, route authorities, airport slots and certain pre-delivery payments. At December 31, 2019 , the maturities of long-term debt are as follows (in millions): 2020 $ 2,293 2021 3,508 2022 1,551 2023 4,072 2024 1,521 2025 and thereafter 9,632 Total $ 22,577 (a) 2013, 2014, April 2016 and December 2016 Credit Facilities 2013 Credit Facilities In November 2019, American and AAG entered into the Sixth Amendment to Amended and Restated Credit and Guaranty Agreement, amending the Amended and Restated Credit and Guaranty Agreement dated as of May 21, 2015 (as previously amended, the 2013 Credit Agreement; the revolving credit facility established thereunder, the 2013 Revolving Facility; the term loan facility established thereunder, the 2013 Term Loan Facility; and the 2013 Revolving Facility together with the 2013 Term Loan Facility, the 2013 Credit Facilities), which reduced the total aggregate commitments under the 2013 Revolving Facility to $750 million from $1.0 billion . In addition, certain lenders party to the 2013 Credit Agreement extended the maturity date of their commitments under the 2013 Revolving Facility to October 2024 from October 2023. 2014 Credit Facilities In November 2019, American and AAG entered into the Seventh Amendment to Amended and Restated Credit and Guaranty Agreement, amending the Amended and Restated Credit and Guaranty Agreement dated as of April 20, 2015 (as previously amended, the 2014 Credit Agreement; the revolving credit facility established thereunder, the 2014 Revolving Facility; the term loan facility established thereunder, the 2014 Term Loan Facility; and the 2014 Revolving Facility together with the 2014 Term Loan Facility, the 2014 Credit Facilities), which increased the total aggregate commitments under the 2014 Revolving Facility to $1.6 billion from $1.5 billion . In addition, certain lenders party to the 2014 Credit Agreement extended the maturity date of their commitments under the 2014 Revolving Facility to October 2024 from October 2023. April 2016 Credit Facilities In November 2019, American and AAG entered into the Fifth Amendment to Credit and Guaranty Agreement, amending the Credit and Guaranty Agreement dated as of April 29, 2016 (as previously amended, April 2016 Credit Agreement; the revolving credit facility established thereunder, the April 2016 Revolving Facility; the term loan facility established thereunder, the 2016 Term Loan Facility; and the April 2016 Revolving Facility together with the 2016 Term Loan Facility, the April 2016 Credit Facilities), which increased the total aggregate commitments under the April 2016 Revolving Facility to $450 million from $300 million . In addition, certain lenders party to the April 2016 Credit Agreement extended the maturity date of their commitments under the April 2016 Revolving Facility to October 2024 from October 2023. December 2016 Credit Facilities In December 2016, American and AAG entered into the Amended and Restated Credit and Guaranty Agreement, dated as of December 15, 2016 (as amended, the December 2016 Credit Agreement; the term loan facility established thereunder, the December 2016 Term Loan Facility; and together with the revolving credit facility that may be established thereunder in the future, the December 2016 Credit Facilities). Certain details of American’s 2013 Credit Facilities, 2014 Credit Facilities, April 2016 Credit Facilities and December 2016 Credit Facilities (collectively referred to as the Credit Facilities) are shown in the table below as of December 31, 2019 : 2013 Credit Facilities 2014 Credit Facilities April 2016 Credit Facilities December 2016 Credit Facilities 2013 Replacement Term Loan 2013 2014 Term 2014 April 2016 April 2016 December 2016 Term Loan Aggregate principal issued or credit facility availability (in millions) $1,919 $750 $1,250 $1,643 $1,000 $450 $1,250 Principal outstanding or drawn (in millions) $1,807 $— $1,202 $— $970 $— $1,213 Maturity date June 2025 October 2024 October 2021 October 2024 April 2023 October 2024 December 2023 LIBOR margin 1.75% 2.00% 2.00% 2.00% 2.00% 2.00% 2.00% The term loans under each of the Credit Facilities are repayable in annual installments in an amount equal to 1.00% of the aggregate principal amount issued, with any unpaid balance due on the respective maturity dates. Voluntary prepayments may be made by American at any time. The 2013 Revolving Facility, 2014 Revolving Facility and April 2016 Revolving Facility provide that American may from time to time borrow, repay and reborrow loans thereunder. The 2013 Revolving Facility and 2014 Revolving Facility have the ability to issue letters of credit thereunder in an aggregate amount outstanding at any time up to $100 million and $200 million , respectively. The 2013 Revolving Facility, 2014 Revolving Facility and April 2016 Revolving Facility are each subject to an undrawn annual fee of 0.63% . As of December 31, 2019 , there were no borrowings or letters of credit outstanding under the 2013 Revolving Facility, 2014 Revolving Facility or April 2016 Revolving Facility. The December 2016 Credit Facilities provide for a revolving credit facility that may be established thereunder in the future. Subject to certain limitations and exceptions, the Credit Facilities are secured by collateral, including certain spare parts, slots, route authorities, simulators and leasehold rights. American has the ability to make future modifications to the collateral pledged, subject to certain restrictions. American’s obligations under the Credit Facilities are guaranteed by AAG. American is required to maintain a certain minimum ratio of appraised value of the collateral to the outstanding loans as further described below in “Collateral-Related Covenants.” The Credit Facilities contain events of default customary for similar financings, including cross default to other material indebtedness. Upon the occurrence of an event of default, the outstanding obligations may be accelerated and become due and payable immediately. In addition, if a “change of control” occurs, American will (absent an amendment or waiver) be required to repay at par the loans outstanding under the Credit Facilities and terminate the 2013 Revolving Facility, 2014 Revolving Facility and April 2016 Revolving Facility and any revolving credit facility established under the December 2016 Credit Facilities. The Credit Facilities also include covenants that, among other things, require AAG to maintain a minimum aggregate liquidity (as defined in the Credit Facilities) of not less than $2.0 billion and limit the ability of AAG and its restricted subsidiaries to pay dividends and make certain other payments, make certain investments, incur additional indebtedness, incur liens on the collateral, dispose of the collateral, enter into certain affiliate transactions and engage in certain business activities, in each case subject to certain exceptions. In December 2019, due to uncertainty surrounding the timing of the Boeing 737 MAX aircraft return to service, American entered into an additional short-term revolving line of credit to provide us with incremental borrowing capacity of up to $400 million . We have no present intention to borrow any amounts under this facility, which matures in September 2020 with an optional extension to December 2020. (b) EETCs 2019-1 Aircraft EETCs In August 2019, American created three pass-through trusts which issued approximately $1.1 billion aggregate face amount of Series 2019-1 Class AA, Class A and Class B EETCs (the 2019-1 Aircraft EETCs) in connection with the financing of 35 aircraft previously delivered or to be delivered to American through September 2020 (the 2019-1 Aircraft). As of December 31, 2019 , approximately $804 million of the proceeds had been used to purchase equipment notes issued by American in connection with financing 28 aircraft under the 2019-1 Aircraft EETCs, of which $608 million was used to repay existing indebtedness. Interest and principal payments on equipment notes issued in connection with the 2019-1 Aircraft EETCs are payable semi-annually in February and August of each year, with interest payments scheduled to begin in February 2020 and with principal payments scheduled to begin (i) in the case of equipment notes with respect to any 2019-1 Aircraft owned by American at the time of issuance of the 2019-1 Aircraft EETCs, in February 2020 and (ii) in the case of equipment notes with respect to the Embraer E175 aircraft and the Airbus A321neo aircraft scheduled to be delivered after the issuance of the 2019-1 Aircraft EETCs, in August 2020 and August 2021, respectively. The remaining proceeds of approximately $293 million as of December 31, 2019 were being held in escrow with a depositary for the benefit of the holders of the 2019-1 Aircraft EETCs until such time as American issues additional equipment notes with respect to the remaining 2019-1 Aircraft to the pass-through trusts, which will purchase such additional equipment notes with the escrowed funds. These escrowed funds are not guaranteed by American and are not reported as debt on its condensed consolidated balance sheet because the proceeds held by the depositary for the benefit of the holders of the 2019-1 Aircraft EETCs are not American’s assets. Certain information regarding the 2019-1 Aircraft EETC equipment notes and remaining escrowed proceeds, as of December 31, 2019 , is set forth in the table below. 2019-1 Aircraft EETCs Series AA Series A Series B Aggregate principal issued $579 million $289 million $229 million Remaining escrowed proceeds $155 million $77 million $61 million Fixed interest rate per annum 3.15% 3.50% 3.85% Maturity date February 2032 February 2032 February 2028 2019-1 Engine EETCs In June 2019 , American created pass-through trusts which issued $650 million in aggregate face amount of 2019-1 Engine EETCs (the 2019-1 Engine EETCs), with maturities from June 2022 to June 2026. All of the proceeds received by such pass-through trusts from the sale of the 2019-1 Engine EETCs have been used to acquire equipment notes issued by American to the pass-through trusts. The pass-through trust certificates represent the right to payment under the equipment notes that are full-recourse obligations of American and such equipment notes are secured by spare aircraft engines currently owned and operated by American. (c) Equipment Loans and Other Notes Payable Issued in 2019 In 2019 , American entered into agreements under which it borrowed $1.7 billion in connection with the financing or refinancing, as the case may be, of certain aircraft and other flight equipment, of which $643 million was used to repay existing indebtedness. Debt incurred under these agreements matures in 2023 through 2031 and bears interest at variable rates (comprised of LIBOR plus an applicable margin) averaging 3.37% at December 31, 2019 . Guarantees As of December 31, 2019 , American had issued guarantees covering AAG’s $500 million aggregate principal amount of 4.625% senior notes due March 2020 and $750 million aggregate principal amount of 5.000% senior notes due June 2022 . Collateral-Related Covenants Certain of American’s debt financing agreements (including its term loans, revolving credit facilities and spare engine EETCs) contain loan to value (LTV) ratio covenants and require American to appraise the related collateral annually. Pursuant to such agreements, if the LTV ratio exceeds a specified threshold or if the value of the appraised collateral fails to meet a specified threshold, as the case may be, American is required, as applicable, to pledge additional qualifying collateral (which in some cases may include cash or investment securities), or pay down such financing, in whole or in part. Specifically, American is required to meet certain collateral coverage tests on an annual basis for its Credit Facilities, as described below: 2013 Credit Facilities 2014 Credit Facilities April 2016 Credit Facilities December 2016 Credit Facilities Frequency of Appraisals of Appraised Collateral Annual Annual Annual Annual LTV Requirement 1.6x Collateral valuation to amount of debt outstanding (62.5% LTV) 1.6x Collateral valuation to amount of debt outstanding (62.5% LTV) 1.6x Collateral valuation to amount of debt outstanding (62.5% LTV) 1.6x Collateral valuation to amount of debt outstanding (62.5% LTV) LTV as of Last Measurement Date 36.2% 17.7% 36.2% 53.6% Collateral Description Generally, certain slots, route authorities and airport gate leasehold rights used by American to operate all services between the U.S. and South America Generally, certain slots, route authorities and airport gate leasehold rights used by American to operate certain services between the U.S. and European Union (including London Heathrow) Generally, certain spare parts Generally, certain Ronald Reagan Washington National Airport (DCA) slots, certain La Guardia Airport (LGA) slots, certain simulators and certain leasehold rights At December 31, 2019 , American was in compliance with the applicable collateral coverage tests as of the most recent measurement dates.

Leases

Leases	12 Months Ended
	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Leases	Leases We lease certain aircraft and engines, including aircraft under capacity purchase agreements. As of December 31, 2019 , we had 636 leased aircraft, with remaining terms ranging from less than one year to 12 years . At each airport where we conduct flight operations, we have agreements, generally with a governmental unit or authority, for the use of passenger, operations and baggage handling space as well as runways and taxiways. These agreements, particularly in the U.S., often contain provisions for periodic adjustments to rates and charges applicable under such agreements. These rates and charges also vary with our level of operations and the operations of the airport. Because of the variable nature of these rates, these leases are not recorded on our balance sheet as a ROU asset or a lease liability. Additionally, at our hub locations and in certain other cities we serve, we lease administrative offices, catering, cargo, training, maintenance and other facilities. The components of lease expense were as follows (in millions): Year Ended December 31, 2019 2018 Operating lease cost $ 2,027 $ 1,907 Finance lease cost: Amortization of assets 79 78 Interest on lease liabilities 43 48 Variable lease cost 2,558 2,353 Total net lease cost $ 4,707 $ 4,386 Included in the table above is $236 million and $226 million of operating lease cost under our capacity purchase agreement with Republic for the years ended December 31, 2019 and 2018 , respectively. We hold a 25% equity interest in Republic Holdings, the parent company of Republic. Supplemental balance sheet information related to leases was as follows (in millions, except lease term and discount rate): December 31, 2019 2018 Operating leases: Operating lease ROU assets $ 8,737 $ 9,151 Current operating lease liabilities $ 1,708 $ 1,654 Noncurrent operating lease liabilities 7,421 7,902 Total operating lease liabilities $ 9,129 $ 9,556 Finance leases: Property and equipment, at cost $ 954 $ 936 Accumulated amortization (447 ) (391 ) Property and equipment, net $ 507 $ 545 Current finance lease liabilities $ 112 $ 81 Noncurrent finance lease liabilities 558 613 Total finance lease liabilities $ 670 $ 694 Weighted average remaining lease term (in years): Operating leases 7.4 7.6 Finance leases 6.2 7.4 Weighted average discount rate: Operating leases 4.7 % 4.6 % Finance leases 6.2 % 6.5 % Supplemental cash flow and other information related to leases was as follows (in millions): Year Ended December 31, 2019 2018 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 2,013 $ 1,931 Operating cash flows from finance leases 43 48 Financing cash flows from finance leases 83 78 Non-cash transactions: ROU assets acquired through operating leases 1,145 1,292 Operating lease conversion to finance lease 41 — Property and equipment acquired through finance leases 20 — Gain on sale leaseback transactions, net 107 59 Maturities of lease liabilities were as follows (in millions): December 31, 2019 Operating Leases Finance Leases 2020 $ 1,990 $ 153 2021 1,817 128 2022 1,620 132 2023 1,429 110 2024 1,030 116 2025 and thereafter 3,276 171 Total lease payments 11,162 810 Less: Imputed interest (2,033 ) (140 ) Total lease obligations 9,129 670 Less: Current obligations (1,708 ) (112 ) Long-term lease obligations $ 7,421 $ 558 As of December 31, 2019 , we have additional operating lease commitments that have not yet commenced of approximately $2.0 billion for 22 787-8 aircraft to be delivered in 2020 and 2021 with lease terms of 10 years .
Leases	Leases We lease certain aircraft and engines, including aircraft under capacity purchase agreements. As of December 31, 2019 , we had 636 leased aircraft, with remaining terms ranging from less than one year to 12 years . At each airport where we conduct flight operations, we have agreements, generally with a governmental unit or authority, for the use of passenger, operations and baggage handling space as well as runways and taxiways. These agreements, particularly in the U.S., often contain provisions for periodic adjustments to rates and charges applicable under such agreements. These rates and charges also vary with our level of operations and the operations of the airport. Because of the variable nature of these rates, these leases are not recorded on our balance sheet as a ROU asset or a lease liability. Additionally, at our hub locations and in certain other cities we serve, we lease administrative offices, catering, cargo, training, maintenance and other facilities. The components of lease expense were as follows (in millions): Year Ended December 31, 2019 2018 Operating lease cost $ 2,027 $ 1,907 Finance lease cost: Amortization of assets 79 78 Interest on lease liabilities 43 48 Variable lease cost 2,558 2,353 Total net lease cost $ 4,707 $ 4,386 Included in the table above is $236 million and $226 million of operating lease cost under our capacity purchase agreement with Republic for the years ended December 31, 2019 and 2018 , respectively. We hold a 25% equity interest in Republic Holdings, the parent company of Republic. Supplemental balance sheet information related to leases was as follows (in millions, except lease term and discount rate): December 31, 2019 2018 Operating leases: Operating lease ROU assets $ 8,737 $ 9,151 Current operating lease liabilities $ 1,708 $ 1,654 Noncurrent operating lease liabilities 7,421 7,902 Total operating lease liabilities $ 9,129 $ 9,556 Finance leases: Property and equipment, at cost $ 954 $ 936 Accumulated amortization (447 ) (391 ) Property and equipment, net $ 507 $ 545 Current finance lease liabilities $ 112 $ 81 Noncurrent finance lease liabilities 558 613 Total finance lease liabilities $ 670 $ 694 Weighted average remaining lease term (in years): Operating leases 7.4 7.6 Finance leases 6.2 7.4 Weighted average discount rate: Operating leases 4.7 % 4.6 % Finance leases 6.2 % 6.5 % Supplemental cash flow and other information related to leases was as follows (in millions): Year Ended December 31, 2019 2018 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 2,013 $ 1,931 Operating cash flows from finance leases 43 48 Financing cash flows from finance leases 83 78 Non-cash transactions: ROU assets acquired through operating leases 1,145 1,292 Operating lease conversion to finance lease 41 — Property and equipment acquired through finance leases 20 — Gain on sale leaseback transactions, net 107 59 Maturities of lease liabilities were as follows (in millions): December 31, 2019 Operating Leases Finance Leases 2020 $ 1,990 $ 153 2021 1,817 128 2022 1,620 132 2023 1,429 110 2024 1,030 116 2025 and thereafter 3,276 171 Total lease payments 11,162 810 Less: Imputed interest (2,033 ) (140 ) Total lease obligations 9,129 670 Less: Current obligations (1,708 ) (112 ) Long-term lease obligations $ 7,421 $ 558 As of December 31, 2019 , we have additional operating lease commitments that have not yet commenced of approximately $2.0 billion for 22 787-8 aircraft to be delivered in 2020 and 2021 with lease terms of 10 years .
American Airlines, Inc. [Member]
Lessee, Lease, Description [Line Items]
Leases	Leases American leases certain aircraft and engines, including aircraft under capacity purchase agreements. As of December 31, 2019 , American had 636 leased aircraft, with remaining terms ranging from less than one year to 12 years . At each airport where American conducts flight operations, American has agreements, generally with a governmental unit or authority, for the use of passenger, operations and baggage handling space as well as runways and taxiways. These agreements, particularly in the U.S., often contain provisions for periodic adjustments to rates and charges applicable under such agreements. These rates and charges also vary with American’s level of operations and the operations of the airport. Because of the variable nature of these rates, these leases are not recorded on American’s balance sheet as a ROU asset or a lease liability. Additionally, at American’s hub locations and in certain other cities it serves, American leases administrative offices, catering, cargo, training, maintenance and other facilities. The components of lease expense were as follows (in millions): Year Ended December 31, 2019 2018 Operating lease cost $ 2,012 $ 1,889 Finance lease cost: Amortization of assets 79 78 Interest on lease liabilities 43 48 Variable lease cost 2,542 2,353 Total net lease cost $ 4,676 $ 4,368 Included in the table above is $236 million and $226 million of operating lease cost under American’s capacity purchase agreement with Republic for the years ended December 31, 2019 and 2018 , respectively. American holds a 25% equity interest in Republic Holdings, the parent company of Republic. Supplemental balance sheet information related to leases was as follows (in millions, except lease term and discount rate): December 31, 2019 2018 Operating leases: Operating lease ROU assets $ 8,694 $ 9,094 Current operating lease liabilities $ 1,695 $ 1,639 Noncurrent operating lease liabilities 7,388 7,857 Total operating lease liabilities $ 9,083 $ 9,496 Finance leases: Property and equipment, at cost $ 954 $ 936 Accumulated amortization (447 ) (391 ) Property and equipment, net $ 507 $ 545 Current finance lease liabilities $ 112 $ 81 Noncurrent finance lease liabilities 558 613 Total finance lease liabilities $ 670 $ 694 Weighted average remaining lease term (in years): Operating leases 7.4 7.6 Finance leases 6.2 7.4 Weighted average discount rate: Operating leases 4.7 % 4.6 % Finance leases 6.2 % 6.5 % Supplemental cash flow and other information related to leases was as follows (in millions): Year Ended December 31, 2019 2018 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 1,996 $ 1,914 Operating cash flows from finance leases 43 48 Financing cash flows from finance leases 83 78 Non-cash transactions: ROU assets acquired through operating leases 1,144 1,258 Operating lease conversion to finance lease 41 — Property and equipment acquired through finance leases 20 — Gain on sale leaseback transactions, net 107 59 Maturities of lease liabilities were as follows (in millions): December 31, 2019 Operating Leases Finance Leases 2020 $ 1,974 $ 153 2021 1,804 128 2022 1,608 132 2023 1,423 110 2024 1,028 116 2025 and thereafter 3,268 171 Total lease payments 11,105 810 Less: Imputed interest (2,022 ) (140 ) Total lease obligations 9,083 670 Less: Current obligations (1,695 ) (112 ) Long-term lease obligations $ 7,388 $ 558 As of December 31, 2019 , American has additional operating lease commitments that have not yet commenced of approximately $2.0 billion for 22 787-8 aircraft to be delivered in 2020 and 2021 with lease terms of 10 years .
Leases	Leases American leases certain aircraft and engines, including aircraft under capacity purchase agreements. As of December 31, 2019 , American had 636 leased aircraft, with remaining terms ranging from less than one year to 12 years . At each airport where American conducts flight operations, American has agreements, generally with a governmental unit or authority, for the use of passenger, operations and baggage handling space as well as runways and taxiways. These agreements, particularly in the U.S., often contain provisions for periodic adjustments to rates and charges applicable under such agreements. These rates and charges also vary with American’s level of operations and the operations of the airport. Because of the variable nature of these rates, these leases are not recorded on American’s balance sheet as a ROU asset or a lease liability. Additionally, at American’s hub locations and in certain other cities it serves, American leases administrative offices, catering, cargo, training, maintenance and other facilities. The components of lease expense were as follows (in millions): Year Ended December 31, 2019 2018 Operating lease cost $ 2,012 $ 1,889 Finance lease cost: Amortization of assets 79 78 Interest on lease liabilities 43 48 Variable lease cost 2,542 2,353 Total net lease cost $ 4,676 $ 4,368 Included in the table above is $236 million and $226 million of operating lease cost under American’s capacity purchase agreement with Republic for the years ended December 31, 2019 and 2018 , respectively. American holds a 25% equity interest in Republic Holdings, the parent company of Republic. Supplemental balance sheet information related to leases was as follows (in millions, except lease term and discount rate): December 31, 2019 2018 Operating leases: Operating lease ROU assets $ 8,694 $ 9,094 Current operating lease liabilities $ 1,695 $ 1,639 Noncurrent operating lease liabilities 7,388 7,857 Total operating lease liabilities $ 9,083 $ 9,496 Finance leases: Property and equipment, at cost $ 954 $ 936 Accumulated amortization (447 ) (391 ) Property and equipment, net $ 507 $ 545 Current finance lease liabilities $ 112 $ 81 Noncurrent finance lease liabilities 558 613 Total finance lease liabilities $ 670 $ 694 Weighted average remaining lease term (in years): Operating leases 7.4 7.6 Finance leases 6.2 7.4 Weighted average discount rate: Operating leases 4.7 % 4.6 % Finance leases 6.2 % 6.5 % Supplemental cash flow and other information related to leases was as follows (in millions): Year Ended December 31, 2019 2018 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 1,996 $ 1,914 Operating cash flows from finance leases 43 48 Financing cash flows from finance leases 83 78 Non-cash transactions: ROU assets acquired through operating leases 1,144 1,258 Operating lease conversion to finance lease 41 — Property and equipment acquired through finance leases 20 — Gain on sale leaseback transactions, net 107 59 Maturities of lease liabilities were as follows (in millions): December 31, 2019 Operating Leases Finance Leases 2020 $ 1,974 $ 153 2021 1,804 128 2022 1,608 132 2023 1,423 110 2024 1,028 116 2025 and thereafter 3,268 171 Total lease payments 11,105 810 Less: Imputed interest (2,022 ) (140 ) Total lease obligations 9,083 670 Less: Current obligations (1,695 ) (112 ) Long-term lease obligations $ 7,388 $ 558 As of December 31, 2019 , American has additional operating lease commitments that have not yet commenced of approximately $2.0 billion for 22 787-8 aircraft to be delivered in 2020 and 2021 with lease terms of 10 years .

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2019
Income Taxes [Line Items]
Income Taxes	Income Taxes The significant components of the income tax provision were (in millions): Year Ended December 31, 2019 2018 2017 Current income tax provision: State and Local $ 2 $ 3 $ 10 Foreign 8 29 14 Current income tax provision 10 32 24 Deferred income tax provision: Federal 498 390 2,026 State and Local 62 50 63 Deferred income tax provision 560 440 2,089 Total income tax provision $ 570 $ 472 $ 2,113 The income tax provision differed from amounts computed at the statutory federal income tax rate as follows (in millions): Year Ended December 31, 2019 2018 2017 Statutory income tax provision $ 474 $ 396 $ 1,188 State income tax provision, net of federal tax effect 47 44 59 Book expenses not deductible for tax purposes 31 12 33 Foreign income taxes, net of federal tax effect 8 23 7 Change in valuation allowance 4 (6 ) (3 ) 2017 Tax Act — — 823 Other, net 6 3 6 Income tax provision $ 570 $ 472 $ 2,113 We provide a valuation allowance for our deferred tax assets, which include our net operating losses (NOLs), when it is more likely than not that some portion, or all of our deferred tax assets, will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income. We consider all available positive and negative evidence and make certain assumptions in evaluating the realizability of our deferred tax assets. Many factors are considered that impact our assessment of future profitability, including conditions which are beyond our control, such as the health of the economy, the availability and price volatility of aircraft fuel and travel demand. The components of our deferred tax assets and liabilities were (in millions): December 31, 2019 2018 Deferred tax assets: Operating loss carryforwards $ 2,103 $ 2,343 Leases 2,077 2,189 Loyalty program liability 1,755 1,770 Pensions 1,229 1,430 Postretirement benefits other than pensions 145 145 Rent expense 126 136 Alternative minimum tax (AMT) credit carryforwards 90 175 Reorganization items 30 33 Other 613 631 Total deferred tax assets 8,168 8,852 Valuation allowance (34 ) (30 ) Net deferred tax assets 8,134 8,822 Deferred tax liabilities: Accelerated depreciation and amortization (5,196 ) (5,280 ) Leases (1,979 ) (2,081 ) Other (343 ) (326 ) Total deferred tax liabilities (7,518 ) (7,687 ) Net deferred tax asset $ 616 $ 1,135 At December 31, 2019 , we had approximately $9.1 billion of federal NOLs carried over from prior taxable years (NOL Carryforwards) to reduce future federal taxable income, substantially all of which we expect to be available for use in 2020. The federal NOL Carryforwards will expire beginning in 2023 if unused. We also had approximately $3.0 billion of NOL Carryforwards to reduce future state taxable income at December 31, 2019 , which will expire in years 2020 through 2039 if unused. Our ability to deduct our NOL Carryforwards and to utilize certain other available tax attributes can be substantially constrained under the general annual limitation rules of Section 382 where an “ownership change” has occurred. Substantially all of our remaining federal NOL Carryforwards attributable to US Airways Group are subject to limitation under Section 382; however, our ability to utilize such NOL Carryforwards is not anticipated to be effectively constrained as a result of such limitation. We elected to be covered by certain special rules for federal income tax purposes that permitted approximately $9.0 billion (with $7.3 billion of unlimited NOL still remaining at December 31, 2019 ) of our federal NOL Carryforwards to be utilized without regard to the annual limitation generally imposed by Section 382. Similar limitations may apply for state income tax purposes. Our ability to utilize any new NOL Carryforwards arising after the ownership changes is not affected by the annual limitation rules imposed by Section 382 unless another future ownership change occurs. Under the Section 382 limitation, cumulative stock ownership changes among material stockholders exceeding 50% during a rolling three-year period can potentially limit a company’s future use of NOLs and tax credits. At December 31, 2019 , we had an AMT credit carryforward of approximately $170 million available for federal income tax purposes, which is presently expected to be fully refundable over the next several years as a result of the repeal of corporate AMT as part of the 2017 Tax Act. In 2019 , we recorded an income tax provision of $570 million , with an effective rate of approximately 25% , which was substantially non-cash due to utilization of our NOLs as described above. Substantially all of our income before income taxes is attributable to the United States. We file our tax returns as prescribed by the tax laws of the jurisdictions in which we operate. Our 2016 through 2018 tax years are still subject to examination by the Internal Revenue Service. Various state and foreign jurisdiction tax years remain open to examination and we are under examination, in administrative appeals, or engaged in tax litigation in certain jurisdictions. We believe that the effect of any assessments will not be material to our consolidated financial statements. The amount of, and changes to, our uncertain tax positions were not material in any of the years presented. We accrue interest and penalties related to unrecognized tax benefits in interest expense and operating expense, respectively. The 2017 Tax Act was enacted on December 22, 2017 and is the most comprehensive tax change in more than 30 years. We completed our evaluation of the 2017 Tax Act and we reflected the impact of its effects, including the impact of a lower corporate income tax rate (21% vs. 35%) on our deferred tax assets and liabilities and the one-time transition tax on earnings of certain foreign subsidiaries that were previously tax deferred. For the year ended December 31 2017, we recognized a special income tax provision of $823 million
American Airlines, Inc. [Member]
Income Taxes [Line Items]
Income Taxes	Income Taxes The significant components of the income tax provision were (in millions): Year Ended December 31, 2019 2018 2017 Current income tax provision: State and Local $ 2 $ 3 $ 14 Foreign 8 28 10 Current income tax provision 10 31 24 Deferred income tax provision: Federal 567 453 2,176 State and Local 56 50 70 Deferred income tax provision 623 503 2,246 Total income tax provision $ 633 $ 534 $ 2,270 The income tax provision differed from amounts computed at the statutory federal income tax rate as follows (in millions): Year Ended December 31, 2019 2018 2017 Statutory income tax provision $ 547 $ 460 $ 1,244 State income tax provision, net of federal tax effect 41 46 53 Book expenses not deductible for tax purposes 29 10 30 Foreign income taxes, net of federal tax effect 8 22 6 Change in valuation allowance 5 (6 ) 4 2017 Tax Act — — 924 Other, net 3 2 9 Income tax provision $ 633 $ 534 $ 2,270 American provides a valuation allowance for its deferred tax assets, which include the net operating losses (NOLs), when it is more likely than not that some portion, or all of its deferred tax assets, will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income. American considers all available positive and negative evidence and makes certain assumptions in evaluating the realizability of its deferred tax assets. Many factors are considered that impact American’s assessment of future profitability, including conditions which are beyond its control, such as the health of the economy, the availability and price volatility of aircraft fuel and travel demand. The components of American’s deferred tax assets and liabilities were (in millions): December 31, 2019 2018 Deferred tax assets: Operating loss carryforwards $ 2,115 $ 2,420 Leases 2,067 2,176 Loyalty program liability 1,755 1,770 Pensions 1,219 1,421 Postretirement benefits other than pensions 145 145 Rent expense 126 136 Alternative minimum tax (AMT) credit carryforwards 118 231 Reorganization items 30 33 Other 569 588 Total deferred tax assets 8,144 8,920 Valuation allowance (24 ) (19 ) Net deferred tax assets 8,120 8,901 Deferred tax liabilities: Accelerated depreciation and amortization (5,153 ) (5,243 ) Leases (1,968 ) (2,068 ) Other (340 ) (321 ) Total deferred tax liabilities (7,461 ) (7,632 ) Net deferred tax asset $ 659 $ 1,269 At December 31, 2019 , American had approximately $9.2 billion of federal NOLs carried over from prior taxable years (NOL Carryforwards) to reduce future federal taxable income, substantially all of which American expects to be available for use in 2020. American is a member of AAG’s consolidated federal and certain state income tax returns. The amount of federal NOL Carryforwards available in those returns is $9.1 billion , substantially all of which is expected to be available for use in 2020. The federal NOL Carryforwards will expire beginning in 2023 if unused. American also had approximately $2.9 billion of NOL Carryforwards to reduce future state taxable income at December 31, 2019 , which will expire in years 2020 through 2039 if unused. American’s ability to deduct its NOL Carryforwards and to utilize certain other available tax attributes can be substantially constrained under the general annual limitation rules of Section 382 where an “ownership change” has occurred. Substantially all of American’s remaining federal NOL Carryforwards attributable to US Airways Group are subject to limitation under Section 382; however, American’s ability to utilize such NOL Carryforwards is not anticipated to be effectively constrained as a result of such limitation. American elected to be covered by certain special rules for federal income tax purposes that permitted approximately $9.5 billion (with $7.2 billion of unlimited NOL still remaining at December 31, 2019 ) of its federal NOL Carryforwards to be utilized without regard to the annual limitation generally imposed by Section 382. Similar limitations may apply for state income tax purposes. American’s ability to utilize any new NOL Carryforwards arising after the ownership changes is not affected by the annual limitation rules imposed by Section 382 unless another future ownership change occurs. Under the Section 382 limitation, cumulative stock ownership changes among material stockholders exceeding 50% during a rolling three-year period can potentially limit a company’s future use of NOLs and tax credits. At December 31, 2019 , American had an AMT credit carryforward of approximately $226 million available for federal income tax purposes, which is presently expected to be fully refundable over the next several years as a result of the repeal of corporate AMT as part of the 2017 Tax Act. In 2019 , American recorded an income tax provision of $633 million , with an effective rate of approximately 24% , which was substantially non-cash as American utilized its NOLs as described above. Substantially all of American’s income before income taxes is attributable to the United States. American is part of the AAG consolidated income tax return. American files its tax returns as prescribed by the tax laws of the jurisdictions in which it operates. American’s 2016 through 2018 tax years are still subject to examination by the Internal Revenue Service. Various state and foreign jurisdiction tax years remain open to examination and American is under examination, in administrative appeals, or engaged in tax litigation in certain jurisdictions. American believes that the effect of any assessments will not be material to its consolidated financial statements. The amount of, and changes to, American’s uncertain tax positions were not material in any of the years presented. American accrues interest and penalties related to unrecognized tax benefits in interest expense and operating expense, respectively. The 2017 Tax Act was enacted on December 22, 2017 and is the most comprehensive tax change in more than 30 years. American completed its evaluation of the 2017 Tax Act and American reflected the impact of its effects, including the impact of a lower corporate income tax rate (21% vs. 35%) on its deferred tax assets and liabilities and the one-time transition tax on earnings of certain foreign subsidiaries that were previously tax deferred. For the year ended December 31 2017, American recognized a special income tax provision of $924 million

Risk Management

Risk Management	12 Months Ended
	Dec. 31, 2019
Debt Instrument [Line Items]
Risk Management	Risk Management Our economic prospects are heavily dependent upon two variables we cannot control: the health of the economy and the price of fuel. Due to the discretionary nature of business and leisure travel spending and the highly competitive nature of the airline industry, our revenues are heavily influenced by the condition of the U.S. economy and economies in other regions of the world. Unfavorable conditions in these broader economies have resulted, and may result in the future, in decreased passenger demand for air travel, changes in booking practices and related reactions by our competitors, all of which in turn have had, and may have in the future, a negative effect on our business. In addition, during challenging economic times, actions by our competitors to increase their revenues can have an adverse impact on our revenues. Our operating results are materially impacted by changes in the availability, price volatility and cost of aircraft fuel, which represents one of the largest single cost items in our business. Aircraft fuel prices have in the past, and may in the future, experience substantial volatility. Because of the amount of fuel needed to operate our business, even a relatively small increase or decrease in the price of aircraft fuel can have a material effect on our operating results and liquidity. These additional factors could impact our results of operations, financial performance and liquidity: (a) Credit Risk Most of our receivables relate to tickets sold to individual passengers through the use of major credit cards or to tickets sold by other airlines and used by passengers on American. These receivables are short-term, mostly settled within seven days after sale. Bad debt losses, which have been minimal in the past, have been considered in establishing allowances for doubtful accounts. We do not believe we are subject to any significant concentration of credit risk. (b) Interest Rate Risk We have exposure to market risk associated with changes in interest rates related primarily to our variable-rate debt obligations. Interest rates on $9.6 billion principal amount of long-term debt as of December 31, 2019 are subject to adjustment to reflect changes in floating interest rates. The weighted average effective interest rate on our variable-rate debt was 3.6% at December 31, 2019 . We currently do not have an interest rate hedge program to hedge our exposure to floating interest rates on our variable-rate debt obligations. (c) Foreign Currency Risk We are exposed to the effect of foreign exchange rate fluctuations on the U.S. dollar value of foreign currency-denominated transactions. Our largest exposure comes from the British pound, Euro, Canadian dollar and various Latin American currencies, primarily the Brazilian real. We do not currently have a foreign currency hedge program.
American Airlines, Inc. [Member]
Debt Instrument [Line Items]
Risk Management	Risk Management American’s economic prospects are heavily dependent upon two variables it cannot control: the health of the economy and the price of fuel. Due to the discretionary nature of business and leisure travel spending and the highly competitive nature of the airline industry, American’s revenues are heavily influenced by the condition of the U.S. economy and economies in other regions of the world. Unfavorable conditions in these broader economies have resulted, and may result in the future, in decreased passenger demand for air travel, changes in booking practices and related reactions by American’s competitors, all of which in turn have had, and may have in the future, a negative effect on American’s business. In addition, during challenging economic times, actions by its competitors to increase their revenues can have an adverse impact on American’s revenues. American’s operating results are materially impacted by changes in the availability, price volatility and cost of aircraft fuel, which represents one of the largest single cost items in American’s business. Aircraft fuel prices have in the past, and may in the future, experience substantial volatility. Because of the amount of fuel needed to operate American’s business, even a relatively small increase or decrease in the price of aircraft fuel can have a material effect on American’s operating results and liquidity. These additional factors could impact American’s results of operations, financial performance and liquidity: (a) Credit Risk Most of American’s receivables relate to tickets sold to individual passengers through the use of major credit cards or to tickets sold by other airlines and used by passengers on American. These receivables are short-term, mostly settled within seven days after sale. Bad debt losses, which have been minimal in the past, have been considered in establishing allowances for doubtful accounts. American does not believe it is subject to any significant concentration of credit risk. (b) Interest Rate Risk American has exposure to market risk associated with changes in interest rates related primarily to its variable-rate debt obligations. Interest rates on $9.6 billion principal amount of long-term debt as of December 31, 2019 are subject to adjustment to reflect changes in floating interest rates. The weighted average effective interest rate on American’s variable-rate debt was 3.6% at December 31, 2019 . American currently does not have an interest rate hedge program to hedge its exposure to floating interest rates on its variable-rate debt obligations. (c) Foreign Currency Risk American is exposed to the effect of foreign exchange rate fluctuations on the U.S. dollar value of foreign currency-denominated transactions. American’s largest exposure comes from the British pound, Euro, Canadian dollar and various Latin American currencies, primarily the Brazilian real. American does not currently have a foreign currency hedge program.

Fair Value Measurements and Oth

Fair Value Measurements and Other Investments	12 Months Ended
	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurements and Other Investments	Fair Value Measurements and Other Investments Assets Measured at Fair Value on a Recurring Basis Fair value is defined as the price that would be received from the sale of an asset or paid to transfer a liability (i.e. an exit price) on the measurement date in an orderly transaction between market participants in the principal or most advantageous market for the asset or liability. Accounting standards include disclosure requirements around fair values used for certain financial instruments and establish a fair value hierarchy. The hierarchy prioritizes valuation inputs into three levels based on the extent to which inputs used in measuring fair value are observable in the market. Each fair value measurement is reported in one of three levels: • Level 1 – Observable inputs such as quoted prices in active markets; • Level 2 – Inputs, other than quoted prices in active markets, that are observable either directly or indirectly; and • Level 3 – Unobservable inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions. When available, we use quoted market prices to determine the fair value of our financial assets. If quoted market prices are not available, we measure fair value using valuation techniques that use, when possible, current market-based or independently-sourced market parameters, such as interest rates and currency rates. We utilize the market approach to measure the fair value of our financial assets. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets. Our short-term investments classified as Level 2 primarily utilize broker quotes in a non-active market for valuation of these securities. No changes in valuation techniques or inputs occurred during the year ended December 31, 2019 . Assets measured at fair value on a recurring basis are summarized below (in millions): Fair Value Measurements as of December 31, 2019 Total Level 1 Level 2 Level 3 Short-term investments (1), (2) : Money market funds $ 333 $ 333 $ — $ — Bank notes/certificates of deposit/time deposits 2,107 — 2,107 — Corporate obligations 1,021 — 1,021 — Repurchase agreements 85 — 85 — 3,546 333 3,213 — Restricted cash and short-term investments (1) 158 10 148 — Long-term investments (3) 204 204 — — Total $ 3,908 $ 547 $ 3,361 $ — Fair Value Measurements as of December 31, 2018 Total Level 1 Level 2 Level 3 Short-term investments (1) : Money market funds $ 16 $ 16 $ — $ — Bank notes/certificates of deposit/time deposits 2,436 — 2,436 — Corporate obligations 1,658 — 1,658 — Repurchase agreements 375 — 375 — 4,485 16 4,469 — Restricted cash and short-term investments (1) 154 12 142 — Long-term investments (3) 189 189 — — Total $ 4,828 $ 217 $ 4,611 $ — (1) Unrealized gains and losses on short-term investments are recorded in accumulated other comprehensive loss at each measurement date. (2) All short-term investments are classified as available-for-sale and stated at fair value. Our short-term investments as of December 31, 2019 mature in one year or less except for $1.1 billion of bank notes/certificates of deposit/time deposits and $95 million of corporate obligations. (3) Long-term investments primarily include our equity investment in China Southern Airlines, in which we presently own a 2.2% equity interest, and are classified in other assets on the consolidated balance sheets. Fair Value of Debt The fair value of our long-term debt was estimated using quoted market prices or discounted cash flow analyses, based on our current estimated incremental borrowing rates for similar types of borrowing arrangements. If our long-term debt was measured at fair value, it would have been classified as Level 2 in the fair value hierarchy. The carrying value and estimated fair value of our long-term debt, including current maturities, were as follows (in millions): December 31, 2019 December 31, 2018 Carrying Value Fair Value Carrying Value Fair Value Long-term debt, including current maturities $ 23,645 $ 24,508 $ 23,779 $ 23,775
American Airlines, Inc. [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurements and Other Investments	Fair Value Measurements and Other Investments Assets Measured at Fair Value on a Recurring Basis Fair value is defined as the price that would be received from the sale of an asset or paid to transfer a liability (i.e. an exit price) on the measurement date in an orderly transaction between market participants in the principal or most advantageous market for the asset or liability. Accounting standards include disclosure requirements around fair values used for certain financial instruments and establish a fair value hierarchy. The hierarchy prioritizes valuation inputs into three levels based on the extent to which inputs used in measuring fair value are observable in the market. Each fair value measurement is reported in one of three levels: • Level 1 – Observable inputs such as quoted prices in active markets; • Level 2 – Inputs, other than quoted prices in active markets, that are observable either directly or indirectly; and • Level 3 – Unobservable inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions. When available, American uses quoted market prices to determine the fair value of its financial assets. If quoted market prices are not available, American measures fair value using valuation techniques that use, when possible, current market-based or independently-sourced market parameters, such as interest rates and currency rates. American utilizes the market approach to measure the fair value of its financial assets. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets. American’s short-term investments classified as Level 2 primarily utilize broker quotes in a non-active market for valuation of these securities. No changes in valuation techniques or inputs occurred during the year ended December 31, 2019 . Assets measured at fair value on a recurring basis are summarized below (in millions): Fair Value Measurements as of December 31, 2019 Total Level 1 Level 2 Level 3 Short-term investments (1), (2) : Money market funds $ 331 $ 331 $ — $ — Bank notes/certificates of deposit/time deposits 2,106 — 2,106 — Corporate obligations 1,021 — 1,021 — Repurchase agreements 85 — 85 — 3,543 331 3,212 — Restricted cash and short-term investments (1) 158 10 148 — Long-term investments (3) 204 204 — — Total $ 3,905 $ 545 $ 3,360 $ — Fair Value Measurements as of December 31, 2018 Total Level 1 Level 2 Level 3 Short-term investments (1) : Money market funds $ 14 $ 14 $ — $ — Bank notes/certificates of deposit/time deposits 2,435 — 2,435 — Corporate obligations 1,658 — 1,658 — Repurchase agreements 375 — 375 — 4,482 14 4,468 — Restricted cash and short-term investments (1) 154 12 142 — Long-term investments (3) 189 189 — — Total $ 4,825 $ 215 $ 4,610 $ — (1) Unrealized gains and losses on short-term investments are recorded in accumulated other comprehensive loss at each measurement date. (2) All short-term investments are classified as available-for-sale and stated at fair value. American’s short-term investments as of December 31, 2019 mature in one year or less except for $1.1 billion of bank notes/certificates of deposit/time deposits and $95 million of corporate obligations. (3) Long-term investments primarily include American's equity investment in China Southern Airlines, in which American presently owns a 2.2% equity interest, and are classified in other assets on the consolidated balance sheets. Fair Value of Debt The fair value of American’s long-term debt was estimated using quoted market prices or discounted cash flow analyses, based on American’s current estimated incremental borrowing rates for similar types of borrowing arrangements. If American’s long-term debt was measured at fair value, it would have been classified as Level 2 in the fair value hierarchy. The carrying value and estimated fair value of American’s long-term debt, including current maturities, were as follows (in millions): December 31, 2019 December 31, 2018 Carrying Value Fair Value Carrying Value Fair Value Long-term debt, including current maturities $ 22,372 $ 23,196 $ 22,503 $ 22,497

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Employee Benefit Plans	Employee Benefit Plans We sponsor defined benefit and defined contribution pension plans for eligible employees. The defined benefit pension plans provide benefits for participating employees based on years of service and average compensation for a specified period of time before retirement. Effective November 1, 2012, substantially all of our defined benefit pension plans were frozen and we began providing enhanced benefits under our defined contribution pension plans for certain employee groups. We use a December 31 measurement date for all of our defined benefit pension plans. We also provide certain retiree medical and other postretirement benefits, including health care and life insurance benefits, to retired employees. Effective November 1, 2012, we modified our retiree medical and other postretirement benefits plans to eliminate the company subsidy for employees who retire on or after November 1, 2012. As a result of modifications to our retiree medical and other postretirement benefits plans in 2012, we recognized a negative plan amendment of $1.9 billion , which is included as a component of prior service benefit in accumulated other comprehensive income (loss) (AOCI) and will be amortized over the future service life of the active plan participants for whom the benefit was eliminated, or approximately eight years . As of December 31, 2019 , $150 million of prior service benefit remains, which will be fully amortized in 2020. Benefit Obligations, Fair Value of Plan Assets and Funded Status The following tables provide a reconciliation of the changes in the pension and retiree medical and other postretirement benefits obligations, fair value of plan assets and a statement of funded status as of December 31, 2019 and 2018 : Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2019 2018 (In millions) Benefit obligation at beginning of period $ 16,378 $ 18,275 $ 837 $ 1,011 Service cost 2 3 3 5 Interest cost 703 674 33 35 Actuarial (gain) loss (1), (2) 1,965 (1,910 ) 20 (133 ) Settlements (2 ) (4 ) — — Benefit payments (689 ) (662 ) (74 ) (81 ) Other 1 2 5 — Benefit obligation at end of period $ 18,358 $ 16,378 $ 824 $ 837 Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2019 2018 (In millions) Fair value of plan assets at beginning of period $ 10,053 $ 11,395 $ 225 $ 295 Actual return (loss) on plan assets 2,305 (1,151 ) 41 (24 ) Employer contributions (3) 1,230 475 12 35 Settlements (2 ) (4 ) — — Benefit payments (689 ) (662 ) (74 ) (81 ) Fair value of plan assets at end of period $ 12,897 $ 10,053 $ 204 $ 225 Funded status at end of period $ (5,461 ) $ (6,325 ) $ (620 ) $ (612 ) (1) The 2019 and 2018 pension actuarial (gain) loss primarily relates to changes in our weighted average discount rate and mortality assumption and, in 2018 , changes to our retirement rate assumptions. (2) The 2019 retiree medical and other postretirement benefits actuarial loss primarily relates to changes in our weighted average discount rate assumption and plan experience adjustments. The 2018 retiree medical and other postretirement benefits actuarial gain primarily relates to changes in our weighted average discount rate, medical trend and per capita claims assumptions. (3) During 2019 , we contributed $1.2 billion to our defined benefit pension plans, including supplemental contributions of $444 million and a $786 million minimum required contribution. During 2018 , we contributed $475 million to our defined benefit pension plans, including supplemental contributions of $433 million and a $42 million minimum required contribution. Balance Sheet Position Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2019 2018 (In millions) As of December 31, Current liability $ 5 $ 7 $ 24 $ 23 Noncurrent liability 5,456 6,318 596 589 Total liabilities $ 5,461 $ 6,325 $ 620 $ 612 Net actuarial loss (gain) $ 5,680 $ 5,356 $ (426 ) $ (452 ) Prior service cost (benefit) 104 131 (120 ) (362 ) Total accumulated other comprehensive loss (income), pre-tax $ 5,784 $ 5,487 $ (546 ) $ (814 ) Plans with Accumulated Benefit Obligations Exceeding Fair Value of Plan Assets Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2019 2018 (In millions) Projected benefit obligation $ 18,327 $ 16,351 $ — $ — Accumulated benefit obligation (ABO) 18,315 16,341 — — Accumulated postretirement benefit obligation — — 824 837 Fair value of plan assets 12,862 10,023 204 225 ABO less fair value of plan assets 5,453 6,318 — — Net Periodic Benefit Cost (Income) Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2017 2019 2018 2017 (In millions) Defined benefit plans: Service cost $ 2 $ 3 $ 2 $ 3 $ 5 $ 4 Interest cost 703 674 721 33 35 39 Expected return on assets (815 ) (905 ) (790 ) (15 ) (24 ) (21 ) Settlements — — 1 — — — Amortization of: Prior service cost (benefit) 28 28 28 (236 ) (236 ) (237 ) Unrecognized net loss (gain) 150 141 144 (31 ) (21 ) (23 ) Net periodic benefit cost (income) $ 68 $ (59 ) $ 106 $ (246 ) $ (241 ) $ (238 ) The components of net periodic benefit cost (income) other than the service cost component are included in nonoperating other income, net in our consolidated statements of operations. The estimated amount of unrecognized actuarial net loss and prior service cost for the defined benefit pension plans that will be amortized from AOCI into net periodic benefit cost over the next fiscal year is $194 million . The estimated amount of unrecognized actuarial net gain and prior service benefit for the retiree medical and other postretirement benefits plans that will be amortized from AOCI into net periodic benefit cost over the next fiscal year is $167 million . Assumptions The following actuarial assumptions were used to determine our benefit obligations and net periodic benefit cost (income) for the periods presented: Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2019 2018 Benefit obligations: Weighted average discount rate 3.4% 4.4% 3.3% 4.3% Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2017 2019 2018 2017 Net periodic benefit cost (income): Weighted average discount rate 4.4% 3.8% 4.3% 4.3% 3.6% 4.1% Weighted average expected rate of return on plan assets 8.0% 8.0% 8.0% 8.0% 8.0% 8.0% Weighted average health care cost trend rate assumed for next year (1) N/A N/A N/A 3.7% 3.9% 4.2% (1) The weighted average health care cost trend rate at December 31, 2019 is assumed to decline gradually to 3.3% by 2027 and remain level thereafter. As of December 31, 2019 , our estimate of the long-term rate of return on plan assets was 8.0% based on the target asset allocation. Expected returns on long duration bonds are based on yields to maturity of the bonds held at year-end. Expected returns on other assets are based on a combination of long-term historical returns, actual returns on plan assets achieved over the last ten years, current and expected market conditions, and expected value to be generated through active management and securities lending programs. A one percentage point change in the assumed health care cost trend rates would have the following approximate effects on our retiree medical and other postretirement benefits plans (in millions): 1% Increase 1% Decrease Increase (decrease) on 2019 service and interest cost $ 1 $ (1 ) Increase (decrease) on benefit obligation as of December 31, 2019 40 (40 ) Minimum Contributions We are required to make minimum contributions to our defined benefit pension plans under the minimum funding requirements of the Employee Retirement Income Security Act of 1974 (ERISA) and various other laws for U.S. based plans as well as underfunding rules specific to countries where we maintain defined benefit plans. Based on current funding assumptions, we have minimum required contributions of $196 million for 2020 including contributions to defined benefit plans for our wholly-owned regional subsidiaries. Our funding obligations will depend on the performance of our investments held in trust by the pension plans, interest rates for determining liabilities, the amount of and timing of any supplemental contributions and our actuarial experience. Benefit Payments The following benefit payments, which reflect expected future service as appropriate, are expected to be paid (approximately, in millions): 2020 2021 2022 2023 2024 2025-2029 Pension benefits $ 753 $ 792 $ 832 $ 874 $ 914 $ 5,045 Retiree medical and other postretirement benefits 80 71 66 64 61 265 Plan Assets The objectives of our investment policies are to: maintain sufficient income and liquidity to pay retirement benefits; produce a long-term rate of return that meets or exceeds the assumed rate of return for plan assets; limit the volatility of asset performance and funded status; and diversify assets among asset classes and investment managers. Based on these investment objectives, a long-term strategic asset allocation has been established. This strategic allocation seeks to balance the potential benefit of improving the funded position with the potential risk that the funded position would decline. The current strategic target asset allocation is as follows: Asset Class/Sub-Class Allowed Range Equity 45% - 80% Public: U.S. Large 15% - 40% U.S. Small/Mid 2% - 10% International 10% - 25% Emerging Markets 2% - 15% Alternative Investments 5% - 30% Fixed Income 20% - 55% Public: U.S. Long Duration 15% - 45% High Yield and Emerging Markets 0% - 10% Private Income 0% - 10% Other 0% - 5% Cash Equivalents 0% - 20% Public equity as well as high yield and emerging market fixed income securities are used to provide diversification and are expected to generate higher returns over the long-term than U.S. long duration bonds. Public stocks are managed using a value investment approach in order to participate in the returns generated by stocks in the long-term, while reducing year-over-year volatility. U.S. long duration bonds are used to partially hedge the assets from declines in interest rates. Alternative (private) investments are used to provide expected returns in excess of the public markets over the long-term. The pension plan’s master trust also participates in securities lending programs to generate additional income by loaning plan assets to borrowers on a fully collateralized basis. These programs are subject to market risk. Investments in securities traded on recognized securities exchanges are valued at the last reported sales price on the last business day of the year. Securities traded in the over-the-counter market are valued at the last bid price. The money market fund is valued at fair value which represents the net asset value of the shares of such fund as of the close of business at the end of the period. Investments in limited partnerships are carried at estimated net asset value as determined by and reported by the general partners of the partnerships and represent the proportionate share of the estimated fair value of the underlying assets of the limited partnerships. Common/collective trusts are valued at net asset value based on the fair values of the underlying investments of the trusts as determined by the sponsor of the trusts. The pension plan’s master trust also invests in a 103-12 investment entity (the 103-12 Investment Trust) which is designed to invest plan assets of more than one unrelated employer. The 103-12 Investment Trust is valued at net asset value which is determined by the issuer daily and is based on the aggregate fair value of trust assets less liabilities, divided by the number of units outstanding. No changes in valuation techniques or inputs occurred during the year. Benefit Plan Assets Measured at Fair Value on a Recurring Basis The fair value of our pension plan assets at December 31, 2019 and 2018 , by asset category, were as follows (in millions): Fair Value Measurements as of December 31, 2019 Asset Category Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Cash and cash equivalents $ 20 $ — $ — $ 20 Equity securities: International markets (a), (b) 2,769 — — 2,769 Large-cap companies (b) 2,312 — — 2,312 Mid-cap companies (b) 543 — — 543 Small-cap companies (b) 97 — — 97 Mutual funds (c) 68 — — 68 Fixed income: Corporate debt (d) — 2,804 — 2,804 Government securities (e) — 923 — 923 U.S. municipal securities — 51 — 51 Mortgage backed securities — 4 — 4 Alternative instruments: Private market partnerships (f) — — 10 10 Private market partnerships measured at net asset value (f), (g) — — — 1,464 Common/collective trusts (h) — 358 — 358 Common/collective trusts and 103-12 Investment Trust measured at net asset value (g), (h) — — — 1,423 Insurance group annuity contracts — — 2 2 Dividend and interest receivable 53 — — 53 Due to/from brokers for sale of securities – net (4 ) — — (4 ) Total $ 5,858 $ 4,140 $ 12 $ 12,897 (a) Holdings are diversified as follows: 14% United Kingdom, 8% Switzerland, 8% Ireland, 7% Japan, 7% France, 6% South Korea, 6% Canada, 18% emerging markets and the remaining 26% with no concentration greater than 5% in any one country. (b) There are no significant concentrations of holdings by company or industry. (c) Investment includes mutual funds invested 40% in equity securities of large-cap, mid-cap and small-cap U.S. companies, 33% in U.S. treasuries and corporate bonds and 27% in equity securities of international companies. (d) Includes approximately 76% investments in corporate debt with a S&P rating lower than A and 24% investments in corporate debt with a S&P rating A or higher. Holdings include 86% U.S. companies, 11% international companies and 3% emerging market companies. (e) Includes approximately 79% investments in U.S. domestic government securities, 13% in emerging market government securities and 8% in international government securities. There are no significant foreign currency risks within this classification. (f) Includes limited partnerships that invest primarily in domestic private equity and private income opportunities. The pension plan’s master trust does not have the right to redeem its limited partnership investment at its net asset value, but rather receives distributions as the underlying assets are liquidated. It is estimated that the underlying assets of these funds will be gradually liquidated over the next one to ten years . Additionally, the pension plan’s master trust has future funding commitments of approximately $1.4 billion over the next ten years . (g) Certain investments that are measured using net asset value per share (or its equivalent) as a practical expedient for fair value have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the notes to the consolidated financial statements. (h) Investment includes 36% in a common/collective trust investing in securities of larger companies within the U.S., 29% in a common/collective trust investing in securities of smaller companies located outside the U.S., 16% in a collective interest trust investing primarily in short-term securities, 15% in an emerging market 103-12 Investment Trust with investments in emerging country equity securities and 4% in Canadian segregated balanced value, income growth and diversified pooled funds. For some trusts, requests for withdrawals must meet specific requirements with advance notice of redemption preferred. Fair Value Measurements as of December 31, 2018 Asset Category Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Cash and cash equivalents $ 23 $ — $ — $ 23 Equity securities: International markets (a), (b) 3,181 — — 3,181 Large-cap companies (b) 2,021 — — 2,021 Mid-cap companies (b) 583 — — 583 Small-cap companies (b) 122 — — 122 Mutual funds (c) 52 — — 52 Fixed income: Corporate debt (d) — 2,116 — 2,116 Government securities (e) — 228 — 228 U.S. municipal securities — 40 — 40 Alternative instruments: Private market partnerships (f) — — 7 7 Private market partnerships measured at net asset value (f), (g) — — — 1,188 Common/collective trusts (h) — 218 — 218 Common/collective trusts and 103-12 Investment Trust measured at net asset value (g), (h) — — — 227 Insurance group annuity contracts — — 2 2 Dividend and interest receivable 47 — — 47 Due to/from brokers for sale of securities – net 5 — — 5 Other liabilities – net (7 ) — — (7 ) Total $ 6,027 $ 2,602 $ 9 $ 10,053 (a) Holdings are diversified as follows: 17% United Kingdom, 10% Japan, 8% France, 7% Switzerland, 6% Ireland, 17% emerging markets and the remaining 35% with no concentration greater than 5% in any one country. (b) There are no significant concentrations of holdings by company or industry. (c) Investment includes mutual funds invested 37% in equity securities of large-cap, mid-cap and small-cap U.S. companies, 38% in U.S. treasuries and corporate bonds and 25% in equity securities of international companies. (d) Includes approximately 77% investments in corporate debt with a S&P rating lower than A and 23% investments in corporate debt with a S&P rating A or higher. Holdings include 85% U.S. companies, 12% international companies and 3% emerging market companies. (e) Includes approximately 32% investments in U.S. domestic government securities, 37% in emerging market government securities and 31% in international government securities. There are no significant foreign currency risks within this classification. (f) Includes limited partnerships that invest primarily in U.S. ( 94% ) and European ( 6% ) buyout opportunities of a range of privately held companies. The pension plan’s master trust does not have the right to redeem its limited partnership investment at its net asset value, but rather receives distributions as the underlying assets are liquidated. It is estimated that the underlying assets of these funds will be gradually liquidated over the next one to ten years . Additionally, the pension plan’s master trust has future funding commitments of approximately $1.0 billion over the next ten years . (g) Certain investments that are measured using net asset value per share (or its equivalent) as a practical expedient for fair value have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the notes to the consolidated financial statements. (h) Investment includes 45% in an emerging market 103-12 Investment Trust with investments in emerging country equity securities, 37% in a collective interest trust investing primarily in short-term securities, 12% in Canadian segregated balanced value, income growth and diversified pooled funds and 6% in a common/collective trust investing in securities of smaller companies located outside the U.S., including developing markets. For some trusts, requests for withdrawals must meet specific requirements with advance notice of redemption preferred. Changes in fair value measurements of Level 3 investments during the year ended December 31, 2019 , were as follows (in millions): Private Market Partnerships Insurance Group Annuity Contracts Beginning balance at December 31, 2018 $ 7 $ 2 Purchases 3 — Ending balance at December 31, 2019 $ 10 $ 2 Changes in fair value measurements of Level 3 investments during the year ended December 31, 2018 , were as follows (in millions): Private Market Partnerships Insurance Group Annuity Contracts Beginning balance at December 31, 2017 $ 14 $ 2 Actual loss on plan assets: Relating to assets still held at the reporting date (2 ) — Purchases 1 — Sales (6 ) — Ending balance at December 31, 2018 $ 7 $ 2 The fair value of our retiree medical and other postretirement benefits plans assets by asset category, were as follows (in millions): Fair Value Measurements as of December 31, 2019 Asset Category Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Money market fund $ 4 $ — $ — $ 4 Mutual funds – AAL Class — 200 — 200 Total $ 4 $ 200 $ — $ 204 Fair Value Measurements as of December 31, 2018 Asset Category Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Money market fund $ 4 $ — $ — $ 4 Mutual funds – AAL Class — 221 — 221 Total $ 4 $ 221 $ — $ 225 Investments in the retiree medical and other postretirement benefits plans’ mutual funds are valued by quoted prices on the active market, which is fair value, and represents the net asset value of the shares of such funds as of the close of business at the end of the period. The AAL Class mutual funds are offered only to benefit plans of American, therefore, trading is restricted only to American, resulting in a fair value classification of Level 2. Investments included approximately 24% and 30% of investments in non-U.S. common stocks in 2019 and 2018 , respectively. Net asset value is based on the fair market value of the funds’ underlying assets and liabilities at the date of determination. Defined Contribution and Multiemployer Plans The costs associated with our defined contribution plans were $860 million , $846 million and $820 million for the years ended December 31, 2019 , 2018 and 2017 , respectively. We participate in the International Association of Machinists & Aerospace Workers (IAM) National Pension Fund, Employer Identification No. 51-6031295 and Plan No. 002 (the IAM Pension Fund). Our contributions to the IAM Pension Fund were $32 million , $31 million and $31 million for the years ended December 31, 2019 , 2018 and 2017 , respectively. The IAM Pension Fund reported $467 million in employers’ contributions for the year ended December 31, 2018 , which is the most recent year for which such information is available. For 2018 , our contributions represented more than 5% of total contributions to the IAM Pension Fund. On March 29, 2019, the actuary for the IAM Pension Fund certified that the fund was in endangered status despite reporting a funded status of over 80% . Additionally, the IAM Pension Fund’s Board voluntarily elected to enter into critical status on April 17, 2019. In connection with the entry into critical status, the IAM Pension Fund adopted a rehabilitation plan on April 17, 2019 (the Rehabilitation Plan). Under the Rehabilitation Plan, we were subject to an immaterial contribution surcharge, which ceased to apply June 14, 2019 upon our adoption of a contribution schedule under the Rehabilitation Plan. The contribution schedule we adopted provides for 2.5% annual increases to our contribution rate. This contribution schedule will remain in effect through the earlier of December 31, 2031 or the date the IAM Pension Fund emerges from critical status. Profit Sharing Program We accrue 5% of our pre-tax income excluding net special items for our profit sharing program. For the year ended December 31, 2019 , we accrued $213 million for this program, which will be distributed to employees in the first quarter of 2020 .
American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Employee Benefit Plans	Employee Benefit Plans American sponsors defined benefit and defined contribution pension plans for eligible employees. The defined benefit pension plans provide benefits for participating employees based on years of service and average compensation for a specified period of time before retirement. Effective November 1, 2012, substantially all of American’s defined benefit pension plans were frozen and American began providing enhanced benefits under its defined contribution pension plans for certain employee groups. American uses a December 31 measurement date for all of its defined benefit pension plans. American also provides certain retiree medical and other postretirement benefits, including health care and life insurance benefits, to retired employees. Effective November 1, 2012, American modified its retiree medical and other postretirement benefits plans to eliminate the company subsidy for employees who retire on or after November 1, 2012. As a result of modifications to its retiree medical and other postretirement benefits plans in 2012, American recognized a negative plan amendment of $1.9 billion , which is included as a component of prior service benefit in accumulated other comprehensive income (loss) (AOCI) and will be amortized over the future service life of the active plan participants for whom the benefit was eliminated, or approximately eight years . As of December 31, 2019 , $150 million of prior service benefit remains, which will be fully amortized in 2020. Benefit Obligations, Fair Value of Plan Assets and Funded Status The following tables provide a reconciliation of the changes in the pension and retiree medical and other postretirement benefits obligations, fair value of plan assets and a statement of funded status as of December 31, 2019 and 2018 : Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2019 2018 (In millions) Benefit obligation at beginning of period $ 16,282 $ 18,175 $ 837 $ 1,010 Service cost 2 2 3 5 Interest cost 699 670 33 35 Actuarial (gain) loss (1), (2) 1,951 (1,905 ) 20 (132 ) Settlements (2 ) (4 ) — — Benefit payments (686 ) (659 ) (74 ) (81 ) Other — 3 5 — Benefit obligation at end of period $ 18,246 $ 16,282 $ 824 $ 837 Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2019 2018 (In millions) Fair value of plan assets at beginning of period $ 10,001 $ 11,340 $ 225 $ 295 Actual return (loss) on plan assets 2,292 (1,148 ) 41 (24 ) Employer contributions (3) 1,224 472 12 35 Settlements (2 ) (4 ) — — Benefit payments (686 ) (659 ) (74 ) (81 ) Fair value of plan assets at end of period $ 12,829 $ 10,001 $ 204 $ 225 Funded status at end of period $ (5,417 ) $ (6,281 ) $ (620 ) $ (612 ) (1) The 2019 and 2018 pension actuarial (gain) loss primarily relates to changes in American’s weighted average discount rate and mortality assumption and, in 2018 , changes to American’s retirement rate assumptions. (2) The 2019 retiree medical and other postretirement benefits actuarial loss primarily relates to changes in American’s weighted average discount rate assumption and plan experience adjustments. The 2018 retiree medical and other postretirement benefits actuarial gain primarily relates to changes in American’s weighted average discount rate, medical trend and per capita claims assumptions. (3) During 2019 , American contributed $1.2 billion to its defined benefit pension plans, including supplemental contributions of $444 million and a $780 million minimum required contribution. During 2018 , American contributed $472 million to its defined benefit pension plans, including supplemental contributions of $433 million and a $39 million minimum required contribution. Balance Sheet Position Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2019 2018 (In millions) As of December 31, Current liability $ 5 $ 7 $ 24 $ 23 Noncurrent liability 5,412 6,274 596 589 Total liabilities $ 5,417 $ 6,281 $ 620 $ 612 Net actuarial loss (gain) $ 5,662 $ 5,341 $ (426 ) $ (452 ) Prior service cost (benefit) 102 131 (120 ) (362 ) Total accumulated other comprehensive loss (income), pre-tax $ 5,764 $ 5,472 $ (546 ) $ (814 ) Plans with Accumulated Benefit Obligations Exceeding Fair Value of Plan Assets Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2019 2018 (In millions) Projected benefit obligation $ 18,215 $ 16,254 $ — $ — Accumulated benefit obligation (ABO) 18,204 16,246 — — Accumulated postretirement benefit obligation — — 824 837 Fair value of plan assets 12,794 9,971 204 225 ABO less fair value of plan assets 5,410 6,275 — — Net Periodic Benefit Cost (Income) Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2017 2019 2018 2017 (In millions) Defined benefit plans: Service cost $ 2 $ 2 $ 2 $ 3 $ 5 $ 4 Interest cost 699 670 717 33 35 39 Expected return on assets (811 ) (901 ) (786 ) (15 ) (24 ) (21 ) Settlements — — 1 — — — Amortization of: Prior service cost (benefit) 28 28 28 (236 ) (236 ) (237 ) Unrecognized net loss (gain) 150 140 144 (31 ) (21 ) (23 ) Net periodic benefit cost (income) $ 68 $ (61 ) $ 106 $ (246 ) $ (241 ) $ (238 ) The components of net periodic benefit cost (income) other than the service cost component are included in nonoperating other income, net in American’s consolidated statements of operations. The estimated amount of unrecognized actuarial net loss and prior service cost for the defined benefit pension plans that will be amortized from AOCI into net periodic benefit cost over the next fiscal year is $193 million . The estimated amount of unrecognized actuarial net gain and prior service benefit for the retiree medical and other postretirement benefits plans that will be amortized from AOCI into net periodic benefit cost over the next fiscal year is $167 million . Assumptions The following actuarial assumptions were used to determine American’s benefit obligations and net periodic benefit cost (income) for the periods presented: Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2019 2018 Benefit obligations: Weighted average discount rate 3.4% 4.4% 3.3% 4.3% Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2017 2019 2018 2017 Net periodic benefit cost (income): Weighted average discount rate 4.4% 3.8% 4.3% 4.3% 3.6% 4.1% Weighted average expected rate of return on plan assets 8.0% 8.0% 8.0% 8.0% 8.0% 8.0% Weighted average health care cost trend rate assumed for next year (1) N/A N/A N/A 3.7% 3.9% 4.2% (1) The weighted average health care cost trend rate at December 31, 2019 is assumed to decline gradually to 3.3% by 2027 and remain level thereafter. As of December 31, 2019 , American’s estimate of the long-term rate of return on plan assets was 8.0% based on the target asset allocation. Expected returns on long duration bonds are based on yields to maturity of the bonds held at year-end. Expected returns on other assets are based on a combination of long-term historical returns, actual returns on plan assets achieved over the last ten years, current and expected market conditions, and expected value to be generated through active management and securities lending programs. A one percentage point change in the assumed health care cost trend rates would have the following approximate effects on American’s retiree medical and other postretirement benefits plans (in millions): 1% Increase 1% Decrease Increase (decrease) on 2019 service and interest cost $ 1 $ (1 ) Increase (decrease) on benefit obligation as of December 31, 2019 40 (40 ) Minimum Contributions American is required to make minimum contributions to its defined benefit pension plans under the minimum funding requirements of the Employee Retirement Income Security Act of 1974 (ERISA) and various other laws for U.S. based plans as well as underfunding rules specific to countries where American maintains defined benefit plans. Based on current funding assumptions, American has minimum required contributions of $193 million for 2020 . American’s funding obligations will depend on the performance of American’s investments held in trust by the pension plans, interest rates for determining liabilities, the amount of and timing of any supplemental contributions and American’s actuarial experience. Benefit Payments The following benefit payments, which reflect expected future service as appropriate, are expected to be paid (approximately, in millions): 2020 2021 2022 2023 2024 2025-2029 Pension benefits $ 749 $ 788 $ 827 $ 869 $ 910 $ 5,017 Retiree medical and other postretirement benefits 80 71 66 64 61 265 Plan Assets The objectives of American’s investment policies are to: maintain sufficient income and liquidity to pay retirement benefits; produce a long-term rate of return that meets or exceeds the assumed rate of return for plan assets; limit the volatility of asset performance and funded status; and diversify assets among asset classes and investment managers. Based on these investment objectives, a long-term strategic asset allocation has been established. This strategic allocation seeks to balance the potential benefit of improving the funded position with the potential risk that the funded position would decline. The current strategic target asset allocation is as follows: Asset Class/Sub-Class Allowed Range Equity 45% - 80% Public: U.S. Large 15% - 40% U.S. Small/Mid 2% - 10% International 10% - 25% Emerging Markets 2% - 15% Alternative Investments 5% - 30% Fixed Income 20% - 55% Public: U.S. Long Duration 15% - 45% High Yield and Emerging Markets 0% - 10% Private Income 0% - 10% Other 0% - 5% Cash Equivalents 0% - 20% Public equity as well as high yield and emerging market fixed income securities are used to provide diversification and are expected to generate higher returns over the long-term than U.S. long duration bonds. Public stocks are managed using a value investment approach in order to participate in the returns generated by stocks in the long-term, while reducing year-over-year volatility. U.S. long duration bonds are used to partially hedge the assets from declines in interest rates. Alternative (private) investments are used to provide expected returns in excess of the public markets over the long-term. The pension plan’s master trust also participates in securities lending programs to generate additional income by loaning plan assets to borrowers on a fully collateralized basis. These programs are subject to market risk. Investments in securities traded on recognized securities exchanges are valued at the last reported sales price on the last business day of the year. Securities traded in the over-the-counter market are valued at the last bid price. The money market fund is valued at fair value which represents the net asset value of the shares of such fund as of the close of business at the end of the period. Investments in limited partnerships are carried at estimated net asset value as determined by and reported by the general partners of the partnerships and represent the proportionate share of the estimated fair value of the underlying assets of the limited partnerships. Common/collective trusts are valued at net asset value based on the fair values of the underlying investments of the trusts as determined by the sponsor of the trusts. The pension plan’s master trust also invests in a 103-12 investment entity (the 103-12 Investment Trust) which is designed to invest plan assets of more than one unrelated employer. The 103-12 Investment Trust is valued at net asset value which is determined by the issuer daily and is based on the aggregate fair value of trust assets less liabilities, divided by the number of units outstanding. No changes in valuation techniques or inputs occurred during the year. Benefit Plan Assets Measured at Fair Value on a Recurring Basis The fair value of American’s pension plan assets at December 31, 2019 and 2018 , by asset category, were as follows (in millions): Fair Value Measurements as of December 31, 2019 Asset Category Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Cash and cash equivalents $ 20 $ — $ — $ 20 Equity securities: International markets (a), (b) 2,769 — — 2,769 Large-cap companies (b) 2,312 — — 2,312 Mid-cap companies (b) 543 — — 543 Small-cap companies (b) 97 — — 97 Fixed income: Corporate debt (c) — 2,804 — 2,804 Government securities (d) — 923 — 923 U.S. municipal securities — 51 — 51 Mortgage backed securities — 4 — 4 Alternative instruments: Private market partnerships (e) — — 10 10 Private market partnerships measured at net asset value (e), (f) — — — 1,464 Common/collective trusts (g) — 358 — 358 Common/collective trusts and 103-12 Investment Trust measured at net asset value (f), (g) — — — 1,423 Insurance group annuity contracts — — 2 2 Dividend and interest receivable 53 — — 53 Due to/from brokers for sale of securities – net (4 ) — — (4 ) Total $ 5,790 $ 4,140 $ 12 $ 12,829 (a) Holdings are diversified as follows: 14% United Kingdom, 8% Switzerland, 8% Ireland, 7% Japan, 7% France, 6% South Korea, 6% Canada, 18% emerging markets and the remaining 26% with no concentration greater than 5% in any one country. (b) There are no significant concentrations of holdings by company or industry. (c) Includes approximately 76% investments in corporate debt with a S&P rating lower than A and 24% investments in corporate debt with a S&P rating A or higher. Holdings include 86% U.S. companies, 11% international companies and 3% emerging market companies. (d) Includes approximately 79% investments in U.S. domestic government securities, 13% in emerging market government securities and 8% in international government securities. There are no significant foreign currency risks within this classification. (e) Includes limited partnerships that invest primarily in domestic private equity and private income opportunities. The pension plan’s master trust does not have the right to redeem its limited partnership investment at its net asset value, but rather receives distributions as the underlying assets are liquidated. It is estimated that the underlying assets of these funds will be gradually liquidated over the next one to ten years . Additionally, the pension plan’s master trust has future funding commitments of approximately $1.4 billion over the next ten years . (f) Certain investments that are measured using net asset value per share (or its equivalent) as a practical expedient for fair value have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the notes to the consolidated financial statements. (g) Investment includes 36% in a common/collective trust investing in securities of larger companies within the U.S., 29% in a common/collective trust investing in securities of smaller companies located outside the U.S., 16% in a collective interest trust investing primarily in short-term securities, 15% in an emerging market 103-12 Investment Trust with investments in emerging country equity securities and 4% in Canadian segregated balanced value, income growth and diversified pooled funds. For some trusts, requests for withdrawals must meet specific requirements with advance notice of redemption preferred. Fair Value Measurements as of December 31, 2018 Asset Category Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Cash and cash equivalents $ 23 $ — $ — $ 23 Equity securities: International markets (a), (b) 3,181 — — 3,181 Large-cap companies (b) 2,021 — — 2,021 Mid-cap companies (b) 583 — — 583 Small-cap companies (b) 122 — — 122 Fixed income: Corporate debt (c) — 2,116 — 2,116 Government securities (d) — 228 — 228 U.S. municipal securities — 40 — 40 Alternative instruments: Private market partnerships (e) — — 7 7 Private market partnerships measured at net asset value (e), (f) — — — 1,188 Common/collective trusts (g) — 218 — 218 Common/collective trusts and 103-12 Investment Trust measured at net asset value (f), (g) — — — 227 Insurance group annuity contracts — — 2 2 Dividend and interest receivable 47 — — 47 Due to/from brokers for sale of securities – net 5 — — 5 Other liabilities – net (7 ) — — (7 ) Total $ 5,975 $ 2,602 $ 9 $ 10,001 (a) Holdings are diversified as follows: 17% United Kingdom, 10% Japan, 8% France, 7% Switzerland, 6% Ireland, 17% emerging markets and the remaining 35% with no concentration greater than 5% in any one country. (b) There are no significant concentrations of holdings by company or industry. (c) Includes approximately 77% investments in corporate debt with a S&P rating lower than A and 23% investments in corporate debt with a S&P rating A or higher. Holdings include 85% U.S. companies, 12% international companies and 3% emerging market companies. (d) Includes approximately 32% investments in U.S. domestic government securities, 37% in emerging market government securities and 31% in international government securities. There are no significant foreign currency risks within this classification. (e) Includes limited partnerships that invest primarily in U.S. ( 94% ) and European ( 6% ) buyout opportunities of a range of privately held companies. The pension plan’s master trust does not have the right to redeem its limited partnership investment at its net asset value, but rather receives distributions as the underlying assets are liquidated. It is estimated that the underlying assets of these funds will be gradually liquidated over the next one to ten years . Additionally, the pension plan’s master trust has future funding commitments of approximately $1.0 billion over the next ten years . (f) Certain investments that are measured using net asset value per share (or its equivalent) as a practical expedient for fair value have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the notes to the consolidated financial statements. (g) Investment includes 45% in an emerging market 103-12 Investment Trust with investments in emerging country equity securities, 37% in a collective interest trust investing primarily in short-term securities, 12% in Canadian segregated balanced value, income growth and diversified pooled funds and 6% in a common/collective trust investing in securities of smaller companies located outside the U.S., including developing markets. For some trusts, requests for withdrawals must meet specific requirements with advance notice of redemption preferred. Changes in fair value measurements of Level 3 investments during the year ended December 31, 2019 , were as follows (in millions): Private Market Partnerships Insurance Group Annuity Contracts Beginning balance at December 31, 2018 $ 7 $ 2 Purchases 3 — Ending balance at December 31, 2019 $ 10 $ 2 Changes in fair value measurements of Level 3 investments during the year ended December 31, 2018 , were as follows (in millions): Private Market Partnerships Insurance Group Annuity Contracts Beginning balance at December 31, 2017 $ 14 $ 2 Actual loss on plan assets: Relating to assets still held at the reporting date (2 ) — Purchases 1 — Sales (6 ) — Ending balance at December 31, 2018 $ 7 $ 2 The fair value of American’s retiree medical and other postretirement benefits plans assets by asset category, were as follows (in millions): Fair Value Measurements as of December 31, 2019 Asset Category Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Money market fund $ 4 $ — $ — $ 4 Mutual funds – AAL Class — 200 — 200 Total $ 4 $ 200 $ — $ 204 Fair Value Measurements as of December 31, 2018 Asset Category Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Money market fund $ 4 $ — $ — $ 4 Mutual funds – AAL Class — 221 — 221 Total $ 4 $ 221 $ — $ 225 Investments in the retiree medical and other postretirement benefits plans’ mutual funds are valued by quoted prices on the active market, which is fair value, and represents the net asset value of the shares of such funds as of the close of business at the end of the period. The AAL Class mutual funds are offered only to benefit plans of American, therefore, trading is restricted only to American, resulting in a fair value classification of Level 2. Investments included approximately 24% and 30% of investments in non-U.S. common stocks in 2019 and 2018 , respectively. Net asset value is based on the fair market value of the funds’ underlying assets and liabilities at the date of determination. Defined Contribution and Multiemployer Plans The costs associated with American’s defined contribution plans were $836 million , $825 million and $813 million for the years ended December 31, 2019 , 2018 and 2017 , respectively. American participates in the International Association of Machinists & Aerospace Workers (IAM) National Pension Fund, Employer Identification No. 51-6031295 and Plan No. 002 (the IAM Pension Fund). American’s contributions to the IAM Pension Fund were $32 million , $31 million and $31 million for the years ended December 31, 2019 , 2018 and 2017 , respectively. The IAM Pension Fund reported $467 million in employers’ contributions for the year ended December 31, 2018 , which is the most recent year for which such information is available. For 2018 , American’s contributions represented more than 5% of total contributions to the IAM Pension Fund. On March 29, 2019, the actuary for the IAM Pension Fund certified that the fund was in endangered status despite reporting a funded status of over 80% . Additionally, the IAM Pension Fund’s Board voluntarily elected to enter into critical status on April 17, 2019. In connection with the entry into critical status, the IAM Pension Fund adopted a rehabilitation plan on April 17, 2019 (the Rehabilitation Plan). Under the Rehabilitation Plan, American was subject to an immaterial contribution surcharge, which ceased to apply June 14, 2019 upon American’s adoption of a contribution schedule under the Rehabilitation Plan. The contribution schedule American adopted provides for 2.5% annual increases to its contribution rate. This contribution schedule will remain in effect through the earlier of December 31, 2031 or the date the IAM Pension Fund emerges from critical status. Profit Sharing Program American accrues 5% of its pre-tax income excluding net special items for its profit sharing program. For the year ended December 31, 2019 , American accrued $213 million for this program, which will be distributed to employees in the first quarter of 2020 .

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	12 Months Ended
	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss The components of AOCI are as follows (in millions): Pension, Unrealized Gain (Loss) on Investments Income Tax (1) Total Balance at December 31, 2017 $ (4,523 ) $ (1 ) $ (1,252 ) $ (5,776 ) Other comprehensive income (loss) before reclassifications (62 ) (4 ) 15 (51 ) Amounts reclassified from AOCI (88 ) — 19 (2) (69 ) Net current-period other comprehensive income (loss) (150 ) (4 ) 34 (120 ) Balance at December 31, 2018 (4,673 ) (5 ) (1,218 ) (5,896 ) Other comprehensive income (loss) before reclassifications (476 ) 3 107 (366 ) Amounts reclassified from AOCI (89 ) — 20 (2) (69 ) Net current-period other comprehensive income (loss) (565 ) 3 127 (435 ) Balance at December 31, 2019 $ (5,238 ) $ (2 ) $ (1,091 ) $ (6,331 ) (1) Relates principally to pension, retiree medical and other postretirement benefits obligations that will not be recognized in net income until the obligations are fully extinguished. (2) Relates to pension, retiree medical and other postretirement benefits obligations and is recognized within the income tax provision on our consolidated statements of operations. Reclassifications out of AOCI for the years ended December 31, 2019 and 2018 are as follows (in millions): Amounts reclassified from AOCI Affected line items on the Year Ended December 31, AOCI Components 2019 2018 Amortization of pension, retiree medical and other postretirement benefits: Prior service benefit $ (162 ) $ (161 ) Nonoperating other income, net Actuarial loss 93 92 Nonoperating other income, net Total reclassifications for the period, net of tax $ (69 ) $ (69 ) Amounts allocated to other comprehensive income for income taxes as further described in Note 7 will remain in AOCI until we cease all related activities, such as termination of the pension plan.
American Airlines, Inc. [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss The components of AOCI are as follows (in millions): Pension, Unrealized Gain (Loss) on Investments Income Tax (1) Total Balance at December 31, 2017 $ (4,508 ) $ (1 ) $ (1,364 ) $ (5,873 ) Other comprehensive income (loss) before reclassifications (61 ) (4 ) 15 (50 ) Amounts reclassified from AOCI (89 ) — 20 (2) (69 ) Net current-period other comprehensive income (loss) (150 ) (4 ) 35 (119 ) Balance at December 31, 2018 (4,658 ) (5 ) (1,329 ) (5,992 ) Other comprehensive income (loss) before reclassifications (471 ) 3 106 (362 ) Amounts reclassified from AOCI (89 ) — 20 (2) (69 ) Net current-period other comprehensive income (loss) (560 ) 3 126 (431 ) Balance at December 31, 2019 $ (5,218 ) $ (2 ) $ (1,203 ) $ (6,423 ) (1) Relates principally to pension, retiree medical and other postretirement benefits obligations that will not be recognized in net income until the obligations are fully extinguished. (2) Relates to pension, retiree medical and other postretirement benefits obligations and is recognized within the income tax provision on American’s consolidated statements of operations. Reclassifications out of AOCI for the years ended December 31, 2019 and 2018 are as follows (in millions): Amounts reclassified from AOCI Affected line items on the Year Ended December 31, AOCI Components 2019 2018 Amortization of pension, retiree medical and other postretirement benefits: Prior service benefit $ (162 ) $ (161 ) Nonoperating other income, net Actuarial loss 93 92 Nonoperating other income, net Total reclassifications for the period, net of tax $ (69 ) $ (69 ) Amounts allocated to other comprehensive income for income taxes as further described in Note 5 will remain in AOCI until American ceases all related activities, such as termination of the pension plan.

Commitments, Contingencies and

Commitments, Contingencies and Guarantees	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies [Line Items]
Commitments, Contingencies and Guarantees	Commitments, Contingencies and Guarantees (a) Aircraft, Engine and Other Purchase Commitments Under all of our aircraft and engine purchase agreements, our total future commitments as of December 31, 2019 are expected to be as follows (approximately, in millions): 2020 2021 2022 2023 2024 2025 and Thereafter Total Payments for aircraft commitments and certain engines (1) $ 1,629 $ 750 $ 1,599 $ 1,543 $ 2,574 $ 4,855 $ 12,950 (1) These amounts are net of purchase deposits currently held by the manufacturers. We have granted a security interest in certain of our purchase deposits with Boeing. Our purchase deposits held by all manufacturers totaled $1.7 billion as of December 31, 2019 . On March 13, 2019, a directive from the Federal Aviation Administration (FAA) grounded all U.S.-registered Boeing 737 MAX aircraft. We currently have 76 Boeing 737 MAX Family aircraft on order and we have not taken delivery of any Boeing 737 MAX Family aircraft since the grounding. The extent of the delay to the scheduled deliveries of the Boeing 737 MAX aircraft is expected to be impacted by the length of time the FAA order remains in place, Boeing's production rate and the pace at which Boeing can deliver aircraft following the lifting of the FAA order, among other factors. Due to uncertainty surrounding the timing of delivery of certain aircraft, the amounts in the table represent our current best estimate, including with respect to the delivery of Boeing 737 MAX aircraft; however, the actual delivery schedule may differ from the table above, potentially materially. The amounts in the table exclude 22 787-8 aircraft to be delivered in 2020 and 2021 for which Boeing has committed to provide sale-leaseback financing (in the form of operating leases). See Note 6 for information regarding this operating lease commitment. Additionally, we have purchase commitments related to aircraft fuel, construction projects and information technology support as follows (approximately): $3.5 billion in 2020 , $3.5 billion in 2021 , $1.3 billion in 2022 , $130 million in 2023 , $81 million in 2024 and $77 million in 2025 and thereafter . (b) Capacity Purchase Agreements with Third-Party Regional Carriers American has capacity purchase agreements with third-party regional carriers. The capacity purchase agreements provide that all revenues, including passenger, in-flight, ancillary, mail and freight revenues, go to American. American controls marketing, scheduling, ticketing, pricing and seat inventories. In return, American agrees to pay predetermined fees to these airlines for operating an agreed-upon number of aircraft, without regard to the number of passengers on board. In addition, these agreements provide that American either reimburses or pays 100% of certain variable costs, such as airport landing fees, fuel and passenger liability insurance. As of December 31, 2019 , American’s capacity purchase agreements with third-party regional carriers had expiration dates ranging from 2020 to 2032 , with rights of American to extend the respective terms of certain agreements. As of December 31, 2019 , American’s minimum obligations under its capacity purchase agreements with third-party regional carriers are as follows (approximately, in millions): 2020 2021 2022 2023 2024 2025 and Thereafter Total Minimum obligations under capacity purchase agreements with third-party regional carriers (1) $ 1,115 $ 1,185 $ 1,126 $ 1,077 $ 1,077 $ 3,402 $ 8,982 (1) Represents minimum payments under capacity purchase agreements with third-party regional carriers, which are estimates of costs based on assumed minimum levels of flying under the capacity purchase agreements and American’s actual payments could differ materially. Excludes payments for the lease of certain aircraft under capacity purchase agreements, which are reflected in the operating lease obligations in Note 6. (c) Airport Redevelopment Los Angeles International Airport (LAX) In 2018 , we executed a lease agreement with Los Angeles World Airports (LAWA), which owns and operates LAX, in connection with a $1.6 billion modernization project related to LAX Terminals 4 and 5. Construction will occur in a phased approach, which started in October 2018 and is expected to be completed in 2028. The modernization project will include a unified departure hall to combine the entranceway of Terminals 4 and 5, reconfigured ticket counter and check-in areas with seamless access to security screening areas, 16 security screening lanes with automated technology and upgraded amenities at gate areas. The project will also include renovated break rooms, multi-use meeting rooms and team gathering spaces throughout the terminals to support our team members at LAX. We are managing this project and have legal title to the assets during their construction. As each phase is completed, the assets will be sold and transferred to LAWA, including the site improvements and non-proprietary improvements. As we control the assets during construction, they are recognized on our balance sheet until legal title has transferred. For 2019 , we incurred approximately $98 million in costs relating to the LAX modernization project, which are included within operating property and equipment on our consolidated balance sheet as of December 31, 2019 . (d) Off-Balance Sheet Arrangements Aircraft and Engines American currently operates 382 owned aircraft and 69 leased aircraft, and owns 79 spare aircraft engines, which in each case were financed with EETCs issued by pass-through trusts. These trusts are off-balance sheet entities, the primary purpose of which is to finance the acquisition of flight equipment or to permit issuance of debt backed by existing flight equipment. In the case of aircraft EETCs, rather than finance each aircraft separately when such aircraft is purchased, delivered or refinanced, these trusts allow American to raise the financing for a number of aircraft at one time and, if applicable, place such funds in escrow pending a future purchase, delivery or refinancing of the relevant aircraft. Similarly, in the case of the spare engine EETCs, the trust allows American to use its existing pool of spare engines to raise financing under a single facility. The trusts have also been structured to provide for certain credit enhancements, such as liquidity facilities to cover certain interest payments, that reduce the risks to the purchasers of the trust certificates and, as a result, reduce the cost of aircraft financing to American. Each trust covers a set number of aircraft or spare engines scheduled to be delivered, financed or refinanced upon the issuance of the EETC or within a specific period of time thereafter. At the time of each covered aircraft or spare engine financing, the relevant trust used the proceeds of the issuance of the EETC (which may have been available at the time of issuance thereof or held in escrow until financing of the applicable aircraft following its delivery) to purchase equipment notes relating to the financed aircraft or engines. The equipment notes are issued, at American’s election, in connection with a mortgage financing of the aircraft or spare engines or, in certain cases, by a separate owner trust in connection with a leveraged lease financing of the aircraft. In the case of a leveraged lease financing, the owner trust then leases the aircraft to American. In both cases, the equipment notes are secured by a security interest in the aircraft or engines, as applicable. The pass-through trust certificates are not direct obligations of, nor are they guaranteed by, AAG or American. However, in the case of mortgage financings, the equipment notes issued to the trusts are direct obligations of American and, in certain instances, have been guaranteed by AAG. As of December 31, 2019 , $11.9 billion associated with these mortgage financings is reflected as debt in the accompanying consolidated balance sheet. With respect to leveraged leases, American evaluated whether the leases had characteristics of a variable interest entity. American concluded the leasing entities met the criteria for variable interest entities; however, American concluded it is not the primary beneficiary under these leasing arrangements and accounts for the majority of its EETC leveraged lease financings as operating leases. American’s total future payments to the trusts of each of the relevant EETCs under these leveraged lease financings are $177 million as of December 31, 2019 , which are reflected in the operating lease obligations in Note 6. Letters of Credit and Other We provide financial assurance, such as letters of credit, surety bonds or restricted cash and investments, primarily to support projected workers’ compensation obligations and airport commitments. As of December 31, 2019 , we had $572 million of letters of credit and surety bonds securing various obligations. The letters of credit and surety bonds that are subject to expiration will expire on various dates through 2022 . (e) Legal Proceedings Chapter 11 Cases . On November 29, 2011, AMR, American, and certain of AMR’s other direct and indirect domestic subsidiaries (the Debtors) filed voluntary petitions for relief under Chapter 11 of the United States Bankruptcy Code in the United States Bankruptcy Court for the Southern District of New York (the Bankruptcy Court). On October 21, 2013, the Bankruptcy Court entered an order approving and confirming the Debtors’ fourth amended joint plan of reorganization (as amended, the Plan). On the Effective Date, December 9, 2013, the Debtors consummated their reorganization pursuant to the Plan and completed the Merger. Pursuant to rulings of the Bankruptcy Court, the Plan established the Disputed Claims Reserve to hold shares of AAG common stock reserved for issuance to disputed claimholders at the Effective Date that ultimately become holders of allowed claims. The shares of AAG common stock issued to the Disputed Claims Reserve were originally issued on December 13, 2013 and have at all times since been included in the number of shares issued and outstanding as reported from time to time in our quarterly and annual reports, including for purposes of calculating earnings per common share. As disputed claims are resolved, the claimants receive distributions of shares from the Disputed Claims Reserve. However, we are not required to distribute additional shares above the limits contemplated by the Plan, even if the shares remaining for distribution in the Disputed Claims Reserve are not sufficient to fully pay any additional allowed unsecured claims. To the extent that any of the reserved shares remain undistributed upon resolution of all remaining disputed claims, such shares will not be returned to us but rather will be distributed to former AMR stockholders and former convertible noteholders treated as stockholders under the Plan. As of December 31, 2019 , the Disputed Claims Reserve held approximately 7 million shares of AAG common stock. Private Party Antitrust Action Related to Passenger Capacity. We, along with Delta Air Lines, Inc., Southwest Airlines Co., United Airlines, Inc. and, in the case of litigation filed in Canada, Air Canada, were named as defendants in approximately 100 putative class action lawsuits alleging unlawful agreements with respect to air passenger capacity. The U.S. lawsuits were consolidated in the Federal District Court for the District of Columbia (the DC Court). On June 15, 2018, we reached a settlement agreement with the plaintiffs in the amount of $45 million to resolve all class claims in the U.S. lawsuits. That settlement was approved by the DC Court on May 13, 2019. Three parties who objected to the settlement have appealed that decision to the United States Court of Appeals for the District of Columbia. We believe these appeals are without merit and intend to vigorously defend against them. Private Party Antitrust Action Related to the Merger . On August 6, 2013, a lawsuit captioned Carolyn Fjord, et al., v. AMR Corporation, et al., was filed in the Bankruptcy Court. The complaint named as defendants US Airways Group, US Airways, AMR and American, alleged that the effect of the Merger may be to create a monopoly in violation of Section 7 of the Clayton Antitrust Act, and sought injunctive relief and/or divestiture. On November 27, 2013, the Bankruptcy Court denied plaintiffs’ motion to preliminarily enjoin the Merger. On August 29, 2018, the Bankruptcy Court denied in part defendants' motion for summary judgment, and fully denied plaintiffs' cross-motion for summary judgment. The parties' evidentiary cases were presented before the Bankruptcy Court in a bench trial in March 2019. The parties submitted proposed findings of fact and conclusions of law and made closing arguments in April 2019, and we are awaiting the Bankruptcy Court's decision. We believe this lawsuit is without merit and intend to vigorously defend against the allegations. Pension Benefits Action. On December 11, 2018, a lawsuit captioned Torres, et al. v. American Airlines, Inc., The Employee Benefits Committee and John/Jane Does 1-5, was filed in the United States District Court for the Northern District of Texas. The plaintiffs in this lawsuit purport to represent a class consisting of all participants in and beneficiaries under any of the four American defined benefit pension plans who elected to receive an optional form of benefit other than a lump sum distribution of a participant’s vested benefit. Under ERISA, participants covered by defined benefit plans accrue retirement benefits in the form of a single life annuity payable upon retirement on a monthly basis until the employee’s death, and may elect certain alternative forms of benefit payments. Plaintiffs contend that the mortality tables used by American for purposes of calculations related to these alternative forms of benefits are outdated and that more recent mortality tables would have provided more generous benefits and should have been used to make those calculations. The court has denied our motion to dismiss the complaint. We believe this lawsuit is without merit and intend to vigorously defend against the allegations. General . In addition to the specifically identified legal proceedings, we and our subsidiaries are also engaged in other legal proceedings from time to time. Legal proceedings can be complex and take many months, or even years, to reach resolution, with the final outcome depending on a number of variables, some of which are not within our control. Therefore, although we will vigorously defend ourselves in each of the actions described above and such other legal proceedings, their ultimate resolution and potential financial and other impacts on us are uncertain but could be material. (f) Guarantees and Indemnifications We are party to many routine contracts in which we provide general indemnities in the normal course of business to third parties for various risks. We are not able to estimate the potential amount of any liability resulting from the indemnities. These indemnities are discussed in the following paragraphs. In our aircraft financing agreements, we generally indemnify the financing parties, trustees acting on their behalf and other relevant parties against liabilities (including certain taxes) resulting from the financing, manufacture, design, ownership, operation and maintenance of the aircraft regardless of whether these liabilities (including certain taxes) relate to the negligence of the indemnified parties. Our loan agreements and other LIBOR-based financing transactions (including certain leveraged aircraft leases) generally obligate us to reimburse the applicable lender for incremental costs due to a change in law that imposes (i) any reserve or special deposit requirement against assets of, deposits with or credit extended by such lender related to the loan, (ii) any tax, duty or other charge with respect to the loan (except standard income tax) or (iii) capital adequacy requirements. In addition, our loan agreements and other financing arrangements typically contain a withholding tax provision that requires us to pay additional amounts to the applicable lender or other financing party, generally if withholding taxes are imposed on such lender or other financing party as a result of a change in the applicable tax law. In certain transactions, including certain aircraft financing leases and loans, the lessors, lenders and/or other parties have rights to terminate the transaction based on changes in foreign tax law, illegality or certain other events or circumstances. In such a case, we may be required to make a lump sum payment to terminate the relevant transaction. We have general indemnity clauses in many of our airport and other real estate leases where we as lessee indemnify the lessor (and related parties) against liabilities related to our use of the leased property. Generally, these indemnifications cover liabilities resulting from the negligence of the indemnified parties, but not liabilities resulting from the gross negligence or willful misconduct of the indemnified parties. In addition, we provide environmental indemnities in many of these leases for contamination related to our use of the leased property. Under certain contracts with third parties, we indemnify the third-party against legal liability arising out of an action by the third-party, or certain other parties. The terms of these contracts vary and the potential exposure under these indemnities cannot be determined. We have liability insurance protecting us for some of the obligations we have undertaken under these indemnities. American is required to make principal and interest payments for certain special facility revenue bonds issued by municipalities primarily to build or improve airport facilities and purchase equipment, which are leased to American. The payment of principal and interest of certain special facility revenue bonds is guaranteed by AAG. As of December 31, 2019 , the remaining lease payments through 2035 guaranteeing the principal and interest on these bonds are $589 million and the current carrying amount of the associated operating lease liability in the accompanying consolidated balance sheet is $321 million . As of December 31, 2019 , AAG had issued guarantees covering approximately $725 million of American’s special facility revenue bonds (and interest thereon) and $8.1 billion of American’s secured debt (and interest thereon), including the Credit Facilities and certain EETC financings. (g) Credit Card Processing Agreements We have agreements with companies that process customer credit card transactions for the sale of air travel and other services. Our agreements allow these credit card processing companies, under certain conditions, to hold an amount of our cash (referred to as a holdback) equal to a portion of advance ticket sales that have been processed by that company, but for which we have not yet provided the air transportation. Additional holdback requirements in the event of material adverse changes in our financial condition will reduce our liquidity in the form of unrestricted cash by the amount of the holdbacks. These credit card processing companies are not currently entitled to maintain any holdbacks pursuant to these requirements. (h) Labor Negotiations As of December 31, 2019 , we employed approximately 133,700 active full-time equivalent employees, of which 29,500 were employed by our regional operations. Approximately 85% of employees are covered by collective bargaining agreements (CBAs) with various labor unions and approximately 22% of employees are covered by CBAs that will become amendable within one year. Agreements in principle were reached on January 30, 2020 for joint collective bargaining agreements (JCBAs) covering our mainline maintenance, fleet service, stock clerks, maintenance control technicians and maintenance training instructors. Those agreements are subject to membership ratification vote. Additionally, the post-Merger JCBAs covering our pilots and flight attendants became amendable in January 2020 and December 2019, respectively. Negotiations continue for new agreements for these workgroups as well as for CBAs covering certain employee groups at our wholly-owned regional subsidiaries.
American Airlines, Inc. [Member]
Commitments and Contingencies [Line Items]
Commitments, Contingencies and Guarantees	Commitments, Contingencies and Guarantees (a) Aircraft, Engine and Other Purchase Commitments Under all of American’s aircraft and engine purchase agreements, its total future commitments as of December 31, 2019 are expected to be as follows (approximately, in millions): 2020 2021 2022 2023 2024 2025 and Thereafter Total Payments for aircraft commitments and certain engines (1) $ 1,629 $ 750 $ 1,599 $ 1,543 $ 2,574 $ 4,855 $ 12,950 (1) These amounts are net of purchase deposits currently held by the manufacturers. American has granted a security interest in certain of its purchase deposits with Boeing. American’s purchase deposits held by all manufacturers totaled $1.7 billion as of December 31, 2019 . On March 13, 2019, a directive from the Federal Aviation Administration (FAA) grounded all U.S.-registered Boeing 737 MAX aircraft. American currently has 76 Boeing 737 MAX Family aircraft on order and American has not taken delivery of any Boeing 737 MAX Family aircraft since the grounding. The extent of the delay to the scheduled deliveries of the Boeing 737 MAX aircraft is expected to be impacted by the length of time the FAA order remains in place, Boeing's production rate and the pace at which Boeing can deliver aircraft following the lifting of the FAA order, among other factors. Due to uncertainty surrounding the timing of delivery of certain aircraft, the amounts in the table represent American’s current best estimate, including with respect to the delivery of Boeing 737 MAX aircraft; however, the actual delivery schedule may differ from the table above, potentially materially. The amounts in the table exclude 22 787-8 aircraft to be delivered in 2020 and 2021 for which Boeing has committed to provide sale-leaseback financing (in the form of operating leases). See Note 4 for information regarding this operating lease commitment. Additionally, American has purchase commitments related to aircraft fuel, construction projects and information technology support as follows (approximately): $3.5 billion in 2020 , $3.5 billion in 2021 , $1.3 billion in 2022 , $130 million in 2023 , $81 million in 2024 and $77 million in 2025 and thereafter . (b) Capacity Purchase Agreements with Third-Party Regional Carriers American has capacity purchase agreements with third-party regional carriers. The capacity purchase agreements provide that all revenues, including passenger, in-flight, ancillary, mail and freight revenues, go to American. American controls marketing, scheduling, ticketing, pricing and seat inventories. In return, American agrees to pay predetermined fees to these airlines for operating an agreed-upon number of aircraft, without regard to the number of passengers on board. In addition, these agreements provide that American either reimburses or pays 100% of certain variable costs, such as airport landing fees, fuel and passenger liability insurance. As of December 31, 2019 , American’s capacity purchase agreements with third-party regional carriers had expiration dates ranging from 2020 to 2032 , with rights of American to extend the respective terms of certain agreements. As of December 31, 2019 , American’s minimum obligations under its capacity purchase agreements with third-party regional carriers are as follows (approximately, in millions): 2020 2021 2022 2023 2024 2025 and Thereafter Total Minimum obligations under capacity purchase agreements with third-party regional carriers (1) $ 1,115 $ 1,185 $ 1,126 $ 1,077 $ 1,077 $ 3,402 $ 8,982 (1) Represents minimum payments under capacity purchase agreements with third-party regional carriers, which are estimates of costs based on assumed minimum levels of flying under the capacity purchase agreements and American’s actual payments could differ materially. Excludes payments for the lease of certain aircraft under capacity purchase agreements, which are reflected in the operating lease obligations in Note 4. (c) Airport Redevelopment Los Angeles International Airport (LAX) In 2018 , American executed a lease agreement with Los Angeles World Airports (LAWA), which owns and operates LAX, in connection with a $1.6 billion modernization project related to LAX Terminals 4 and 5. Construction will occur in a phased approach, which started in October 2018 and is expected to be completed in 2028. The modernization project will include a unified departure hall to combine the entranceway of Terminals 4 and 5, reconfigured ticket counter and check-in areas with seamless access to security screening areas, 16 security screening lanes with automated technology and upgraded amenities at gate areas. The project will also include renovated break rooms, multi-use meeting rooms and team gathering spaces throughout the terminals to support American’s team members at LAX. American is managing this project and has legal title to the assets during their construction. As each phase is completed, the assets will be sold and transferred to LAWA, including the site improvements and non-proprietary improvements. As American controls the assets during construction, they are recognized on its balance sheet until legal title has transferred. For 2019 , American incurred approximately $98 million in costs relating to the LAX modernization project, which are included within operating property and equipment on its consolidated balance sheet as of December 31, 2019 . (d) Off-Balance Sheet Arrangements Aircraft and Engines American currently operates 382 owned aircraft and 69 leased aircraft, and owns 79 spare aircraft engines, which in each case were financed with EETCs issued by pass-through trusts. These trusts are off-balance sheet entities, the primary purpose of which is to finance the acquisition of flight equipment or to permit issuance of debt backed by existing flight equipment. In the case of aircraft EETCs, rather than finance each aircraft separately when such aircraft is purchased, delivered or refinanced, these trusts allow American to raise the financing for a number of aircraft at one time and, if applicable, place such funds in escrow pending a future purchase, delivery or refinancing of the relevant aircraft. Similarly, in the case of the spare engine EETCs, the trust allows American to use its existing pool of spare engines to raise financing under a single facility. The trusts have also been structured to provide for certain credit enhancements, such as liquidity facilities to cover certain interest payments, that reduce the risks to the purchasers of the trust certificates and, as a result, reduce the cost of aircraft financing to American. Each trust covers a set number of aircraft or spare engines scheduled to be delivered, financed or refinanced upon the issuance of the EETC or within a specific period of time thereafter. At the time of each covered aircraft or spare engine financing, the relevant trust used the proceeds of the issuance of the EETC (which may have been available at the time of issuance thereof or held in escrow until financing of the applicable aircraft following its delivery) to purchase equipment notes relating to the financed aircraft or engines. The equipment notes are issued, at American’s election, in connection with a mortgage financing of the aircraft or spare engines or, in certain cases, by a separate owner trust in connection with a leveraged lease financing of the aircraft. In the case of a leveraged lease financing, the owner trust then leases the aircraft to American. In both cases, the equipment notes are secured by a security interest in the aircraft or engines, as applicable. The pass-through trust certificates are not direct obligations of, nor are they guaranteed by, AAG or American. However, in the case of mortgage financings, the equipment notes issued to the trusts are direct obligations of American and, in certain instances, have been guaranteed by AAG. As of December 31, 2019 , $11.9 billion associated with these mortgage financings is reflected as debt in the accompanying consolidated balance sheet. With respect to leveraged leases, American evaluated whether the leases had characteristics of a variable interest entity. American concluded the leasing entities met the criteria for variable interest entities; however, American concluded it is not the primary beneficiary under these leasing arrangements and accounts for the majority of its EETC leveraged lease financings as operating leases. American’s total future payments to the trusts of each of the relevant EETCs under these leveraged lease financings are $177 million as of December 31, 2019 , which are reflected in the operating lease obligations in Note 4. Letters of Credit and Other American provides financial assurance, such as letters of credit, surety bonds or restricted cash and investments, primarily to support projected workers’ compensation obligations and airport commitments. As of December 31, 2019 , American had $572 million of letters of credit and surety bonds securing various obligations. The letters of credit and surety bonds that are subject to expiration will expire on various dates through 2022 . (e) Legal Proceedings Chapter 11 Cases . On November 29, 2011, AMR, American, and certain of AMR’s other direct and indirect domestic subsidiaries (the Debtors) filed voluntary petitions for relief under Chapter 11 of the United States Bankruptcy Code in the United States Bankruptcy Court for the Southern District of New York (the Bankruptcy Court). On October 21, 2013, the Bankruptcy Court entered an order approving and confirming the Debtors’ fourth amended joint plan of reorganization (as amended, the Plan). On the Effective Date, December 9, 2013, the Debtors consummated their reorganization pursuant to the Plan and completed the Merger. Pursuant to rulings of the Bankruptcy Court, the Plan established the Disputed Claims Reserve to hold shares of AAG common stock reserved for issuance to disputed claimholders at the Effective Date that ultimately become holders of allowed claims. The shares of AAG common stock issued to the Disputed Claims Reserve were originally issued on December 13, 2013 and have at all times since been included in the number of shares issued and outstanding as reported by AAG from time to time in its quarterly and annual reports, including for purposes of calculating earnings per common share. As disputed claims are resolved, the claimants receive distributions of shares from the Disputed Claims Reserve. However, American is not required to distribute additional shares above the limits contemplated by the Plan, even if the shares remaining for distribution in the Disputed Claims Reserve are not sufficient to fully pay any additional allowed unsecured claims. To the extent that any of the reserved shares remain undistributed upon resolution of all remaining disputed claims, such shares will not be returned to AAG but rather will be distributed to former AMR stockholders and former convertible noteholders treated as stockholders under the Plan. As of December 31, 2019 , the Disputed Claims Reserve held approximately 7 million shares of AAG common stock. Private Party Antitrust Action Related to Passenger Capacity. American, along with Delta Air Lines, Inc., Southwest Airlines Co., United Airlines, Inc. and, in the case of litigation filed in Canada, Air Canada, were named as defendants in approximately 100 putative class action lawsuits alleging unlawful agreements with respect to air passenger capacity. The U.S. lawsuits were consolidated in the Federal District Court for the District of Columbia (the DC Court). On June 15, 2018, American reached a settlement agreement with the plaintiffs in the amount of $45 million to resolve all class claims in the U.S. lawsuits. That settlement was approved by the DC Court on May 13, 2019. Three parties who objected to the settlement have appealed that decision to the United States Court of Appeals for the District of Columbia. American believes these appeals are without merit and intends to vigorously defend against them. Private Party Antitrust Action Related to the Merger . On August 6, 2013, a lawsuit captioned Carolyn Fjord, et al., v. AMR Corporation, et al., was filed in the Bankruptcy Court. The complaint named as defendants US Airways Group, US Airways, AMR and American, alleged that the effect of the Merger may be to create a monopoly in violation of Section 7 of the Clayton Antitrust Act, and sought injunctive relief and/or divestiture. On November 27, 2013, the Bankruptcy Court denied plaintiffs’ motion to preliminarily enjoin the Merger. On August 29, 2018, the Bankruptcy Court denied in part defendants' motion for summary judgment, and fully denied plaintiffs' cross-motion for summary judgment. The parties' evidentiary cases were presented before the Bankruptcy Court in a bench trial in March 2019. The parties submitted proposed findings of fact and conclusions of law and made closing arguments in April 2019, and they are awaiting the Bankruptcy Court's decision. American believes this lawsuit is without merit and intends to vigorously defend against the allegations. Pension Benefits Action. On December 11, 2018, a lawsuit captioned Torres, et al. v. American Airlines, Inc., The Employee Benefits Committee and John/Jane Does 1-5, was filed in the United States District Court for the Northern District of Texas. The plaintiffs in this lawsuit purport to represent a class consisting of all participants in and beneficiaries under any of the four American defined benefit pension plans who elected to receive an optional form of benefit other than a lump sum distribution of a participant’s vested benefit. Under ERISA, participants covered by defined benefit plans accrue retirement benefits in the form of a single life annuity payable upon retirement on a monthly basis until the employee’s death, and may elect certain alternative forms of benefit payments. Plaintiffs contend that the mortality tables used by American for purposes of calculations related to these alternative forms of benefits are outdated and that more recent mortality tables would have provided more generous benefits and should have been used to make those calculations. The court has denied American’s motion to dismiss the complaint. American believes this lawsuit is without merit and intend to vigorously defend against the allegations. General . In addition to the specifically identified legal proceedings, American and its subsidiaries are also engaged in other legal proceedings from time to time. Legal proceedings can be complex and take many months, or even years, to reach resolution, with the final outcome depending on a number of variables, some of which are not within American’s control. Therefore, although American will vigorously defend itself in each of the actions described above and such other legal proceedings, their ultimate resolution and potential financial and other impacts on American are uncertain but could be material. (f) Guarantees and Indemnifications American is a party to many routine contracts in which it provides general indemnities in the normal course of business to third parties for various risks. American is not able to estimate the potential amount of any liability resulting from the indemnities. These indemnities are discussed in the following paragraphs. In its aircraft financing agreements, American generally indemnifies the financing parties, trustees acting on their behalf and other relevant parties against liabilities (including certain taxes) resulting from the financing, manufacture, design, ownership, operation and maintenance of the aircraft regardless of whether these liabilities (including certain taxes) relate to the negligence of the indemnified parties. American’s loan agreements and other LIBOR-based financing transactions (including certain leveraged aircraft leases) generally obligate American to reimburse the applicable lender for incremental costs due to a change in law that imposes (i) any reserve or special deposit requirement against assets of, deposits with or credit extended by such lender related to the loan, (ii) any tax, duty or other charge with respect to the loan (except standard income tax) or (iii) capital adequacy requirements. In addition, American’s loan agreements and other financing arrangements typically contain a withholding tax provision that requires American to pay additional amounts to the applicable lender or other financing party, generally if withholding taxes are imposed on such lender or other financing party as a result of a change in the applicable tax law. In certain transactions, including certain aircraft financing leases and loans, the lessors, lenders and/or other parties have rights to terminate the transaction based on changes in foreign tax law, illegality or certain other events or circumstances. In such a case, American may be required to make a lump sum payment to terminate the relevant transaction. American has general indemnity clauses in many of its airport and other real estate leases where American as lessee indemnifies the lessor (and related parties) against liabilities related to American’s use of the leased property. Generally, these indemnifications cover liabilities resulting from the negligence of the indemnified parties, but not liabilities resulting from the gross negligence or willful misconduct of the indemnified parties. In addition, American provides environmental indemnities in many of these leases for contamination related to American’s use of the leased property. Under certain contracts with third parties, American indemnifies the third-party against legal liability arising out of an action by the third-party, or certain other parties. The terms of these contracts vary and the potential exposure under these indemnities cannot be determined. American has liability insurance protecting American for some of the obligations it has undertaken under these indemnities. American is required to make principal and interest payments for certain special facility revenue bonds issued by municipalities primarily to build or improve airport facilities and purchase equipment, which are leased to American. The payment of principal and interest of certain special facility revenue bonds is guaranteed by American. As of December 31, 2019 , the remaining lease payments through 2035 guaranteeing the principal and interest on these bonds are $589 million and the current carrying amount of the associated operating lease liability in the accompanying consolidated balance sheet is $321 million . As of December 31, 2019 , American had issued guarantees covering AAG’s $500 million aggregate principal amount of 4.625% senior notes due March 2020 and $750 million aggregate principal amount of 5.000% senior notes due June 2022 . (g) Credit Card Processing Agreements American has agreements with companies that process customer credit card transactions for the sale of air travel and other services. American’s agreements allow these credit card processing companies, under certain conditions, to hold an amount of its cash (referred to as a holdback) equal to a portion of advance ticket sales that have been processed by that company, but for which American has not yet provided the air transportation. Additional holdback requirements in the event of material adverse changes in American’s financial condition will reduce its liquidity in the form of unrestricted cash by the amount of the holdbacks. These credit card processing companies are not currently entitled to maintain any holdbacks pursuant to these requirements. (h) Labor Negotiations As of December 31, 2019 , American employed approximately 104,200 active full-time equivalent employees. Approximately 84% of employees are covered by collective bargaining agreements (CBAs) with various labor unions and approximately 25% of employees are covered by CBAs that will become amendable within one year. Agreements in principle were reached on January 30, 2020 for joint collective bargaining agreements (JCBAs) covering American’s maintenance, fleet service, stock clerks, maintenance control technicians and maintenance training instructors. Those agreements are subject to membership ratification vote. Additionally, the post-Merger JCBAs covering American’s pilots and flight attendants became amendable in January 2020 and December 2019, respectively. Negotiations continue for new agreements.

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	12 Months Ended
	Dec. 31, 2019
Other Significant Noncash Transactions [Line Items]
Supplemental Cash Flow Information	Supplemental Cash Flow Information Supplemental disclosure of cash flow information and non-cash investing and financing activities are as follows (in millions): Year Ended December 31, 2019 2018 2017 Non-cash investing and financing activities: Settlement of bankruptcy obligations $ 7 $ — $ 15 Equity Investment — — 120 Supplemental information: Interest paid, net 1,111 1,091 1,040 Income taxes paid 8 18 20
American Airlines, Inc. [Member]
Other Significant Noncash Transactions [Line Items]
Supplemental Cash Flow Information	Supplemental Cash Flow Information Supplemental disclosure of cash flow information and non-cash investing and financing activities are as follows (in millions): Year Ended December 31, 2019 2018 2017 Non-cash investing and financing activities: Settlement of bankruptcy obligations $ 7 $ — $ 15 Equity Investment — — 120 Supplemental information: Interest paid, net 1,025 1,009 942 Income taxes paid 8 16 18

Operating Segments and Related

Operating Segments and Related Disclosures	12 Months Ended
	Dec. 31, 2019
Segment Reporting Information [Line Items]
Operating Segments and Related Disclosures	Operating Segments and Related Disclosures We are managed as a single business unit that provides air transportation for passengers and cargo. This allows us to benefit from an integrated revenue pricing and route network that includes American and our wholly-owned and third-party regional carriers that fly under capacity purchase agreements operating as American Eagle. The flight equipment of all these carriers is combined to form one fleet that is deployed through a single route scheduling system. Financial information and annual operational plans and forecasts are prepared and reviewed by the chief operating decision maker at the consolidated level. When making operational decisions, the chief operating decision maker evaluates flight profitability data, which considers aircraft type and route economics, but is indifferent to the results of the individual wholly-owned regional carriers. The objective in making operational decisions is to maximize consolidated financial results, not the individual results of American or American Eagle. See Note 1(k) for our passenger revenue by geographic region. Our tangible assets consist primarily of flight equipment, which are mobile across geographic markets and, therefore, have not been allocated.
American Airlines, Inc. [Member]
Segment Reporting Information [Line Items]
Operating Segments and Related Disclosures	Operating Segments and Related Disclosures American is managed as a single business unit that provides air transportation for passengers and cargo. This allows it to benefit from an integrated revenue pricing and route network that includes American and AAG’s wholly-owned and third-party regional carriers that fly under capacity purchase agreements operating as American Eagle. The flight equipment of all these carriers is combined to form one fleet that is deployed through a single route scheduling system. Financial information and annual operational plans and forecasts are prepared and reviewed by the chief operating decision maker at the consolidated level. When making operational decisions, the chief operating decision maker evaluates flight profitability data, which considers aircraft type and route economics, but is indifferent to the results of the individual regional carriers. The objective in making operational decisions is to maximize consolidated financial results, not the individual results of American or American Eagle.

Share-based Compensation

Share-based Compensation	12 Months Ended
	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation	Share-based Compensation The 2013 AAG Incentive Award Plan (the 2013 Plan) provides that awards may be in the form of an option, restricted stock award, restricted stock unit award, performance award, dividend equivalent award, deferred stock award, deferred stock unit award, stock payment award or stock appreciation right. The 2013 Plan initially authorized the grant of awards for the issuance of up to 40 million shares. Any shares underlying awards granted under the 2013 Plan that are forfeited, terminate or are settled in cash (in whole or in part) without the delivery of shares will again be available for grant. Our salaries, wages and benefits expense for the years ended December 31, 2019 , 2018 and 2017 included $95 million , $88 million and $90 million , respectively, of share-based compensation costs. During 2019 , 2018 and 2017 , we withheld approximately 0.8 million , 0.8 million and 1.1 million shares of AAG common stock, respectively, and paid approximately $25 million , $37 million and $51 million , respectively, in satisfaction of certain tax withholding obligations associated with employee equity awards. Restricted Stock Unit Awards (RSUs) The majority of our RSUs have service conditions (time vested primarily over three years ). The grant-date fair value of these RSUs is equal to the market price of the underlying shares of AAG common stock on the date of grant. The expense for these RSUs is recognized on a straight-line basis over the vesting period for the entire award. RSUs are classified as equity awards as the vesting results in the issuance of shares of AAG common stock. RSU award activity for all plans for the years ended December 31, 2019 , 2018 and 2017 is as follows: Number of Shares Weighted Average Grant Date Fair Value (In thousands) Outstanding at December 31, 2016 5,187 $ 41.48 Granted 2,309 48.58 Vested and released (2,708 ) 39.63 Forfeited (464 ) 44.48 Outstanding at December 31, 2017 4,324 $ 46.94 Granted 2,194 47.65 Vested and released (1,999 ) 44.99 Forfeited (199 ) 45.72 Outstanding at December 31, 2018 4,320 $ 44.29 Granted 3,206 34.00 Vested and released (2,002 ) 44.90 Forfeited (337 ) 42.55 Outstanding at December 31, 2019 5,187 $ 37.01 As of December 31, 2019 , there was $108 million of unrecognized compensation cost related to RSUs. These costs are expected to be recognized over a weighted average period of one year . The total fair value of RSUs vested during the years ended December 31, 2019 , 2018 and 2017 was $68 million , $91 million and $123 million , respectively.
American Airlines, Inc. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation	Share-based Compensation The 2013 AAG Incentive Award Plan (the 2013 Plan) provides that awards may be in the form of an option, restricted stock award, restricted stock unit award, performance award, dividend equivalent award, deferred stock award, deferred stock unit award, stock payment award or stock appreciation right. The 2013 Plan initially authorized the grant of awards for the issuance of up to 40 million shares. Any shares underlying awards granted under the 2013 Plan that are forfeited, terminate or are settled in cash (in whole or in part) without the delivery of shares will again be available for grant. American’s salaries, wages and benefits expense for the years ended December 31, 2019 , 2018 and 2017 included $95 million , $88 million and $90 million , respectively, of share-based compensation costs. During 2019 , 2018 and 2017 , AAG withheld approximately 0.8 million , 0.8 million and 1.1 million shares of AAG common stock, respectively, and paid approximately $25 million , $37 million and $51 million , respectively, in satisfaction of certain tax withholding obligations associated with employee equity awards. Restricted Stock Unit Awards (RSUs) The majority of American’s RSUs have service conditions (time vested primarily over three years ). The grant-date fair value of these RSUs is equal to the market price of the underlying shares of AAG common stock on the date of grant. The expense for these RSUs is recognized on a straight-line basis over the vesting period for the entire award. RSUs are classified as equity awards as the vesting results in the issuance of shares of AAG common stock. RSU award activity for all plans for the years ended December 31, 2019 , 2018 and 2017 is as follows: Number of Shares Weighted Average Grant Date Fair Value (In thousands) Outstanding at December 31, 2016 5,187 $ 41.48 Granted 2,309 48.58 Vested and released (2,708 ) 39.63 Forfeited (464 ) 44.48 Outstanding at December 31, 2017 4,324 $ 46.94 Granted 2,194 47.65 Vested and released (1,999 ) 44.99 Forfeited (199 ) 45.72 Outstanding at December 31, 2018 4,320 $ 44.29 Granted 3,206 34.00 Vested and released (2,002 ) 44.90 Forfeited (337 ) 42.55 Outstanding at December 31, 2019 5,187 $ 37.01 As of December 31, 2019 , there was $108 million of unrecognized compensation cost related to RSUs. These costs are expected to be recognized over a weighted average period of one year . The total fair value of RSUs vested during the years ended December 31, 2019 , 2018 and 2017 was $68 million , $91 million and $123 million , respectively.

Valuation and Qualifying Accoun

Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2019
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation and Qualifying Accounts	Valuation and Qualifying Accounts (in millions) Balance at Beginning of Year Additions Charged to Statement of Operations Accounts Deductions Balance at End of Year Allowance for obsolescence of spare parts Year ended December 31, 2019 $ 814 $ 91 $ (121 ) $ 784 Year ended December 31, 2018 769 70 (25 ) 814 Year ended December 31, 2017 765 29 (25 ) 769 Allowance for uncollectible accounts Year ended December 31, 2019 $ 29 $ 19 $ (17 ) $ 31 Year ended December 31, 2018 24 42 (37 ) 29 Year ended December 31, 2017 36 43 (55 ) 24
American Airlines, Inc. [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation and Qualifying Accounts	Valuation and Qualifying Accounts (in millions) Balance at Beginning of Year Additions Charged to Statement of Operations Accounts Deductions Balance at End of Year Allowance for obsolescence of spare parts Year ended December 31, 2019 $ 754 $ 79 $ (104 ) $ 729 Year ended December 31, 2018 717 57 (20 ) 754 Year ended December 31, 2017 720 18 (21 ) 717 Allowance for uncollectible accounts Year ended December 31, 2019 $ 24 $ 17 $ (16 ) $ 25 Year ended December 31, 2018 21 39 (36 ) 24 Year ended December 31, 2017 35 41 (55 ) 21

Quarterly Financial Data (Unaud

Quarterly Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2019
Selected Quarterly Financial Information [Line Items]
Quarterly Financial Data (Unaudited)	Quarterly Financial Data (Unaudited) Unaudited summarized financial data by quarter for 2019 and 2018 (in millions, except share and per share amounts): First Quarter Second Quarter Third Quarter Fourth Quarter 2019 Operating revenues $ 10,584 $ 11,960 $ 11,911 $ 11,313 Operating expenses 10,209 10,807 11,103 10,584 Operating income 375 1,153 808 729 Net income 185 662 425 414 Earnings per share: Basic $ 0.41 $ 1.49 $ 0.96 $ 0.95 Diluted $ 0.41 $ 1.49 $ 0.96 $ 0.95 Shares used for computation (in thousands): Basic 451,951 445,008 441,915 434,578 Diluted 453,429 445,587 442,401 435,659 2018 Operating revenues $ 10,401 $ 11,643 $ 11,559 $ 10,938 Operating expenses 10,005 10,639 10,874 10,367 Operating income 396 1,004 685 571 Net income 159 556 372 325 Earnings per share: Basic $ 0.34 $ 1.20 $ 0.81 $ 0.71 Diluted $ 0.34 $ 1.20 $ 0.81 $ 0.70 Shares used for computation (in thousands): Basic 472,297 463,533 460,526 460,589 Diluted 474,598 464,618 461,507 461,915 Our fourth quarter 2019 results include $108 million of total pre-tax net special items that principally included $85 million of merger integration expenses and $39 million of fleet restructuring expenses, offset in part by $42 million of mark-to-market net unrealized gains associated with certain equity and other investments. Our fourth quarter 2018 results include $195 million of total pre-tax net special items that principally included $94 million of fleet restructuring expenses, $81 million of merger integration expenses, $37 million of severance costs associated with reductions of management and support staff team members, $22 million of mark-to-market net unrealized losses associated with certain equity investments, offset in part by a $37 million net credit resulting from mark-to-market adjustments on bankruptcy obligations.
American Airlines, Inc. [Member]
Selected Quarterly Financial Information [Line Items]
Quarterly Financial Data (Unaudited)	Quarterly Financial Data (Unaudited) Unaudited summarized financial data by quarter for 2019 and 2018 (in millions): First Quarter Second Quarter Third Quarter Fourth Quarter 2019 Operating revenues $ 10,581 $ 11,958 $ 11,910 $ 11,312 Operating expenses 10,236 10,831 11,082 10,565 Operating income 345 1,127 828 747 Net income 230 714 508 520 2018 Operating revenues $ 10,398 $ 11,640 $ 11,556 $ 10,936 Operating expenses 9,986 10,626 10,850 10,344 Operating income 412 1,014 706 592 Net income 209 609 433 407 American’s fourth quarter 2019 results include $108 million of total pre-tax net special items that principally included $85 million of merger integration expenses and $39 million of fleet restructuring expenses, offset in part by $42 million of mark-to-market net unrealized gains associated with certain equity and other investments. American’s fourth quarter 2018 results include $190 million of total pre-tax net special items that principally included $94 million of fleet restructuring expenses, $81 million of merger integration expenses, $37 million of severance costs associated with reductions of management and support staff team members, $22 million of mark-to-market net unrealized losses associated with certain equity investments, offset in part by a $37 million net credit resulting from mark-to-market adjustments on bankruptcy obligations.

Transactions with Related Parti

Transactions with Related Parties	12 Months Ended
	Dec. 31, 2019
American Airlines, Inc. [Member]
Related Party Transaction [Line Items]
Transactions with Related Parties	Transactions with Related Parties The following represents the net receivables (payables) to related parties (in millions): December 31, 2019 2018 AAG (1) $ 14,597 $ 12,808 AAG’s wholly-owned subsidiaries (2) (2,146 ) (2,142 ) Total $ 12,451 $ 10,666 (1) The increase in American’s net related party receivable from AAG is primarily due to American providing the cash funding for AAG’s share repurchase and dividend programs. (2) The net payable to AAG’s wholly-owned subsidiaries consists primarily of amounts due under regional capacity purchase agreements with AAG’s wholly-owned regional airlines operating under the brand name of American Eagle. Pursuant to a capacity purchase agreement between American and AAG’s wholly-owned regional airlines operating as American Eagle, American purchases all of the capacity from these carriers and recognizes passenger revenue from flights operated by American Eagle. In 2019 , 2018 and 2017 , American recognized expense of approximately $2.2 billion , $1.8 billion and $1.7 billion , respectively, related to wholly-owned regional airline capacity purchase agreements.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2019
Subsequent Event [Line Items]
Subsequent Events	Subsequent Events Dividend Declaration In January 2020 , we announced that our Board of Directors declared a $0.10 per share cash dividend for stockholders of record on February 5, 2020 , and payable on February 19, 2020 . Any future dividends that may be declared and paid from time to time will be subject to market and economic conditions, applicable legal requirements and other relevant factors. We are not obligated to continue a dividend for any fixed period, and the payment of dividends may be suspended or discontinued at any time at our discretion and without prior notice. 2014 Credit Facilities Refinancing In January 2020, American and AAG entered into the Eighth Amendment (the Eighth Amendment) to Amended and Restated Credit and Guaranty Agreement, amending the 2014 Credit Agreement, pursuant to which American refinanced the 2014 Term Loan Facility, increasing the total aggregate principal outstanding to $1.22 billion , reducing LIBOR margin from 2.00% to 1.75% , with a LIBOR floor of 0% , and reducing the base rate margin from 1.00% to 0.75% . In addition, the maturity date for the 2014 Term Loan Facility was extended to January 2027 from October 2021. The 2014 Revolving Facility remains unchanged and, as of January 29, 2020, the effective date of the Eighth Amendment, there were no borrowings or letters of credit outstanding thereunder.
American Airlines, Inc. [Member]
Subsequent Event [Line Items]
Subsequent Events	Subsequent Event 2014 Credit Facilities Refinancing In January 2020, American and AAG entered into the Eighth Amendment (the Eighth Amendment) to Amended and Restated Credit and Guaranty Agreement, amending the 2014 Credit Agreement, pursuant to which American refinanced the 2014 Term Loan Facility, increasing the total aggregate principal outstanding to $1.22 billion , reducing LIBOR margin from 2.00% to 1.75% , with a LIBOR floor of 0% , and reducing the base rate margin from 1.00% to 0.75% . In addition, the maturity date for the 2014 Term Loan Facility was extended to January 2027 from October 2021. The 2014 Revolving Facility remains unchanged and, as of January 29, 2020, the effective date of the Eighth Amendment, there were no borrowings or letters of credit outstanding thereunder.

Basis of Presentation and Sum_2

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2019
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Basis of Presentation	(a) Basis of Presentation American Airlines Group Inc. (we, us, our and similar terms, or AAG), a Delaware corporation, is a holding company whose primary business activity is the operation of a major network air carrier, providing scheduled air transportation for passengers and cargo through its mainline operating subsidiary, American Airlines, Inc. (American) and its wholly-owned regional airline subsidiaries, Envoy Aviation Group Inc., PSA Airlines, Inc. and Piedmont Airlines, Inc. that operate under the brand American Eagle. On December 9, 2013, a subsidiary of AMR Corporation (AMR) merged with and into US Airways Group, Inc. (US Airways Group), a Delaware corporation, which survived as a wholly-owned subsidiary of AAG, and AAG emerged from Chapter 11 (the Merger). Upon closing of the Merger and emergence from Chapter 11, AMR changed its name to American Airlines Group Inc. All significant intercompany transactions have been eliminated. The preparation of financial statements in accordance with accounting principles generally accepted in the United States (GAAP) requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, revenues and expenses, and the disclosure of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates. The most significant areas of judgment relate to passenger revenue recognition, impairment of goodwill, impairment of long-lived and intangible assets, the loyalty program, as well as pension and retiree medical and other postretirement benefits.
Recent Accounting Pronouncements	(b) Recent Accounting Pronouncements ASU 2016-02: Leases (Topic 842) (the New Lease Standard) The New Lease Standard requires lessees to recognize a lease liability and a right-of-use (ROU) asset on the balance sheet for operating leases. Accounting for finance leases is substantially unchanged. The New Lease Standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. In the fourth quarter of 2018, we elected to early adopt the New Lease Standard as of January 1, 2018 using a modified retrospective transition, with the cumulative-effect adjustment to the opening balance of retained earnings as of the effective date (the effective date method). Under the effective date method, financial results reported in periods prior to 2018 are unchanged. We also elected the package of practical expedients, which among other things, does not require reassessment of lease classification. The adoption of the New Lease Standard had a significant impact on our consolidated balance sheet due to the recognition of approximately $10 billion of lease liabilities with corresponding right-of-use assets for operating leases. Additionally, we recognized a $197 million cumulative effect adjustment credit, net of tax, to retained earnings. The adjustment to retained earnings was driven principally by sale-leaseback transactions including the recognition of unamortized deferred aircraft sale-leaseback gains. Prior to the adoption of the New Lease Standard, gains on sale-leaseback transactions were generally deferred and recognized in the income statement over the lease term. Under the New Lease Standard, gains on sale-leaseback transactions (subject to adjustment for off-market terms) are recognized immediately. ASU 2018-02: Income Statement – Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income This ASU provides the option to reclassify stranded tax effects within accumulated other comprehensive income to retained earnings due to the U.S. federal corporate income tax rate change as a result of H.R. 1, the 2017 Tax Cuts and Jobs Act (the 2017 Tax Act). The amount of the reclassification is the difference between the amount initially charged or credited directly to other comprehensive income at the previous U.S. federal corporate income tax rate that remains in accumulated other comprehensive income and the amount that would have been charged or credited directly to other comprehensive income using the newly enacted U.S. federal corporate income tax rate, excluding the effect of any valuation allowance previously charged to income from continuing operations. This standard is effective for interim and annual reporting periods beginning after December 15, 2018. In the first quarter of 2019, we adopted this standard retrospectively as of December 22, 2017, the date the 2017 Tax Act was enacted, which resulted in the recast of prior reporting periods. As a result of the adoption, we reclassified $622 million of stranded tax effects principally related to our pension plans from accumulated other comprehensive loss to retained earnings. ASU 2016-13: Financial Instruments – Credit Losses (Topic 326) This ASU requires the use of an expected loss model for certain types of financial instruments and requires consideration of a broader range of reasonable and supportable information to calculate credit loss estimates. For trade receivables, loans and held-to - maturity debt securities, an estimate of lifetime expected credit losses is required. For available-for-sale debt securities, an allowance for credit losses will be required rather than a reduction to the carrying value of the asset. This standard is effective for interim and annual reporting periods beginning after December 15, 2019. While we have not completed our evaluation of the impact of adoption of this standard, we do not expect it to have a material impact on our consolidated financial statements.
Short-term Investments	(c) Short-term Investments Short-term investments are classified as available-for-sale and stated at fair value. Realized gains and losses are recorded in nonoperating expense on our consolidated statements of operations. Unrealized gains and losses are recorded in accumulated other comprehensive loss on our consolidated balance sheets.
Restricted Cash and Short-term Investments	(d) Restricted Cash and Short-term Investments We have restricted cash and short-term investments related primarily to collateral held to support workers’ compensation obligations.
Aircraft Fuel, Spare Parts, and Supplies, Net	(e) Aircraft Fuel, Spare Parts and Supplies, Net Aircraft fuel is recorded on a first-in, first-out basis. Spare parts and supplies are recorded at average costs less an allowance for obsolescence. These items are expensed when used.
Operating Property and Equipment	(f) Operating Property and Equipment Operating property and equipment is recorded at cost and depreciated or amortized to residual values over the asset’s estimated useful life or the lease term, whichever is less, using the straight-line method. Residual values for aircraft, engines and related rotable parts are generally 5% to 10% of original cost. Costs of major improvements that enhance the usefulness of the asset are capitalized and depreciated or amortized over the estimated useful life of the asset or the lease term, whichever is less. The estimated useful lives for the principal property and equipment classifications are as follows: Principal Property and Equipment Classification Estimated Useful Life Aircraft, engines and related rotable parts 20 – 30 years Buildings and improvements 5 – 30 years Furniture, fixtures and other equipment 3 – 10 years Capitalized software 5 – 10 years We assess impairment of operating property and equipment when events and circumstances indicate that the assets may be impaired. An asset or group of assets is considered impaired when the undiscounted cash flows estimated to be generated by the assets are less than the carrying amount of the assets and the net book value of the assets exceeds their estimated fair value. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets. Assets to be disposed of are reported at the lower of the carrying amount or fair value less the cost to sell.
Leases	(g) Leases We determine if an arrangement is a lease at inception. Operating leases are included in operating lease right-of-use (ROU) assets, current operating lease liabilities and noncurrent operating lease liabilities in our consolidated balance sheet. Finance leases are included in property and equipment, current maturities of long-term debt and finance leases and long-term debt and finance leases, net of current maturities, in our consolidated balance sheets. ROU assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. ROU assets and liabilities are recognized at the lease commencement date based on the estimated present value of lease payments over the lease term. We use our estimated incremental borrowing rate, which is derived from information available at the lease commencement date , in determining the present value of lease payments. We give consideration to our recent debt issuances as well as publicly available data for instruments with similar characteristics when calculating our incremental borrowing rates. Our lease term includes options to extend the lease when it is reasonably certain that we will exercise that option. Leases with a term of 12 months or less are not recorded on the balance sheet. Our lease agreements do not contain any residual value guarantees. Under certain of our capacity purchase agreements with third-party regional carriers, we do not own the underlying aircraft. However, since we control the marketing, scheduling, ticketing, pricing and seat inventories of these aircraft and therefore control the asset, the aircraft is deemed to be leased for accounting purposes. For these capacity purchase agreements, we account for the lease and non-lease components separately. The lease component consists of the aircraft and the non-lease components consist of services, such as the crew and maintenance. We allocate the consideration in the capacity purchase agreements to the lease and non-lease components using their estimated relative standalone prices. See Note 12(b) for additional information on our capacity purchase agreements . For real estate, we account for the lease and non-lease components as a single lease component.
Income Taxes	(h) Income Taxes Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are recorded net as noncurrent deferred income taxes. We provide a valuation allowance for our deferred tax assets when it is more likely than not that some portion, or all of our deferred tax assets, will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income. We consider all available positive and negative evidence and make certain assumptions in evaluating the realizability of our deferred tax assets. Many factors are considered that impact our assessment of future profitability, including conditions which are beyond our control, such as the health of the economy, the availability and price volatility of aircraft fuel and travel demand.
Goodwill	(i) Goodwill Goodwill represents the excess of the purchase price over the fair value of the net assets acquired and liabilities assumed. Goodwill is not amortized but assessed for impairment annually on October 1 or more frequently if events or circumstances indicate that goodwill may be impaired. We have one consolidated reporting unit.
Other Intangibles, Net	(j) Other Intangibles, Net Intangible assets consist primarily of domestic airport slots, customer relationships, marketing agreements, international slots and route authorities, airport gate leasehold rights and tradenames. Definite-Lived Intangible Assets Definite-lived intangible assets are amortized over their respective estimated useful lives and reviewed for impairment whenever events or changes in circumstances indicate that the carrying value may not be recoverable. Indefinite-Lived Intangible Assets Certain domestic airport slots and airport gate leasehold rights are amortized on a straight-line basis over 25 years . The customer relationships and marketing agreements were identified as intangible assets subject to amortization and are amortized on a straight-line basis over approximately nine years and 30 years , respectively. Tradenames are fully amortized.
Revenue Recognition	(k) Revenue Recognition Revenue The following are the significant categories comprising our reported operating revenues (in millions): Year Ended December 31, 2019 2018 2017 Passenger revenue: Passenger travel $ 38,831 $ 37,457 $ 36,152 Loyalty revenue - travel (1) 3,179 3,219 2,979 Total passenger revenue 42,010 40,676 39,131 Cargo 863 1,013 890 Other: Loyalty revenue - marketing services 2,361 2,352 2,124 Other revenue 534 500 477 Total other revenue 2,895 2,852 2,601 Total operating revenues $ 45,768 $ 44,541 $ 42,622 (1) Loyalty revenue included in passenger revenue is principally comprised of mileage credit redemptions earned through travel or from co-branded credit card and other partners. See “ Loyalty Revenue ” below for further discussion on these mileage credits. The following is our total passenger revenue by geographic region (in millions): Year Ended December 31, 2019 2018 2017 Domestic $ 30,881 $ 29,573 $ 28,749 Latin America 5,047 5,125 4,840 Atlantic 4,624 4,376 4,028 Pacific 1,458 1,602 1,514 Total passenger revenue $ 42,010 $ 40,676 $ 39,131 We attribute passenger revenue by geographic region based upon the origin and destination of each flight segment. Passenger Revenue We recognize all revenues generated from transportation on American and our regional flights operated under the brand name American Eagle, including associated baggage fees, ticketing change fees and other inflight services, as passenger revenue when transportation is provided. Ticket and other related sales for transportation that has not yet been provided are initially deferred and recorded as air traffic liability on our consolidated balance sheets. The air traffic liability principally represents tickets sold for future travel on American and partner airlines, as well as estimated future refunds and exchanges of tickets sold for past travel. The majority of tickets sold are nonrefundable. A small percentage of tickets, some of which are partially used tickets, expire unused. Due to complex pricing structures, refund and exchange policies, and interline agreements with other airlines, certain amounts are recognized in passenger revenue using estimates regarding both the timing of the revenue recognition and the amount of revenue to be recognized. These estimates are generally based on the analysis of our historical data. We have consistently applied this accounting method to estimate revenue from unused tickets at the date of travel. Estimated future refunds and exchanges included in the air traffic liability are routinely evaluated based on subsequent activity to validate the accuracy of our estimates. Any adjustments resulting from periodic evaluations of the estimated air traffic liability are included in passenger revenue during the period in which the evaluations are completed. Various taxes and fees assessed on the sale of tickets to end customers are collected by us as an agent and remitted to taxing authorities. These taxes and fees have been presented on a net basis in the accompanying consolidated statements of operations and recorded as a liability until remitted to the appropriate taxing authority. Loyalty Revenue We currently operate the loyalty program, AAdvantage. This program awards mileage credits to passengers who fly on American, any one world airline or other partner airlines, or by using the services of other program participants, such as the Citi and Barclaycard US co-branded credit cards, and certain hotels and car rental companies. Mileage credits can be redeemed for travel on American and other participating partner airlines, as well as other non-air travel awards such as hotels and rental cars. For mileage credits earned by AAdvantage loyalty program members, we apply the deferred revenue method. Mileage credits earned through travel For mileage credits earned through travel, we apply a relative selling price approach whereby the total amount collected from each passenger ticket sale is allocated between the air transportation and the mileage credits earned. The portion of each passenger ticket sale attributable to mileage credits earned is initially deferred and then recognized in passenger revenue when mileage credits are redeemed and transportation is provided. The estimated selling price of mileage credits is determined using an equivalent ticket value approach, which uses historical data, including award redemption patterns by geographic region and class of service, as well as similar fares as those used to settle award redemptions. The estimated selling price of miles is adjusted for an estimate of miles that will not be redeemed based on historical redemption patterns. Mileage credits sold to co-branded credit cards and other partners We sell mileage credits to participating airline partners and non-airline business partners, including our co-branded credit card partners, under contracts with terms extending generally for one to seven years. Consideration received from the sale of mileage credits is variable and payment terms typically are within 30 days subsequent to the month of mileage sale. Sales of mileage credits to non-airline business partners are comprised of two components, transportation and marketing. We allocate the consideration received from these sales of mileage credits based on the relative selling price of each product or service delivered. Our most significant partner agreements are our co-branded credit card agreements with Citi and Barclaycard US that we entered into in 2016. We identified the following revenue elements in these co-branded credit card agreements: the transportation component; and the use of intellectual property, including the American brand and access to loyalty program member lists, which is the predominant element in the agreements, as well as advertising (collectively, the marketing component). Accordingly, we recognize the marketing component in other revenue in the period of the mileage sale following the sales-based royalty method. The transportation component represents the estimated selling price of future travel awards and is determined using the same equivalent ticket value approach described above. The portion of each mileage credit sold attributable to transportation is initially deferred and then recognized in passenger revenue when mileage credits are redeemed and transportation is provided. For the portion of our outstanding mileage credits that we estimate will not be redeemed, we recognize the associated value proportionally as the remaining mileage credits are redeemed. Our estimates are based on analysis of historical redemptions. Cargo Revenue Cargo revenue is recognized when we provide the transportation. Other Revenue Other revenue includes revenue associated with our loyalty program, which is comprised principally of the marketing component of mileage sales to co-branded credit card and other partners and other marketing related payments. Loyalty revenue included in other revenue was $2.4 billion for both years ended December 31, 2019 and 2018 and $2.1 billion for 2017 . The accounting and recognition for the loyalty program marketing services are discussed above in “ Loyalty Revenue .” The remaining amounts included within other revenue relate to airport clubs, advertising and vacation-related services. Contract Balances Our significant contract liabilities are comprised of (1) outstanding loyalty program mileage credits that may be redeemed for future travel and other non-air travel awards, reported as loyalty program liability on our consolidated balance sheets and (2) ticket sales for transportation that has not yet been provided, reported as air traffic liability on our consolidated balance sheets. December 31, 2019 2018 (in millions) Loyalty program liability $ 8,615 $ 8,539 Air traffic liability 4,808 4,339 Total $ 13,423 $ 12,878 The balance of the loyalty program liability fluctuates based on seasonal patterns, which impact the volume of mileage credits issued through travel or sold to co-branded credit card and other partners (deferral of revenue) and mileage credits redeemed (recognition of revenue). Changes in loyalty program liability are as follows (in millions): Balance at December 31, 2018 $ 8,539 Deferral of revenue 3,438 Recognition of revenue (1) (3,362 ) Balance at December 31, 2019 (2) $ 8,615 (1) Principally relates to revenue recognized from the redemption of mileage credits for both air and non-air travel awards. Mileage credits are combined in one homogenous pool and are not separately identifiable. As such, the revenue is comprised of miles that were part of the loyalty program deferred revenue balance at the beginning of the period, as well as miles that were issued during the period. (2) Mileage credits can be redeemed at any time and do not expire as long as that AAdvantage member has any type of qualifying activity at least every 18 months . As of December 31, 2019 , our current loyalty program liability was $3.2 billion and represents our current estimate of revenue expected to be recognized in the next 12 months based on historical trends, with the balance reflected in long-term loyalty program liability expected to be recognized as revenue in periods thereafter. The air traffic liability principally represents tickets sold for future travel on American and partner airlines, as well as estimated future refunds and exchanges of tickets sold for past travel. The balance in our air traffic liability also fluctuates with seasonal travel patterns. The contract duration of passenger tickets is one year . Accordingly, any revenue associated with tickets sold for future travel will be recognized within 12 months. For 2019 , $3.3 billion of revenue was recognized in passenger revenue that was included in our air traffic liability at December 31, 2018 . With respect to contract receivables, reflected as accounts receivable, net on the accompanying consolidated balance sheets, these primarily include receivables for tickets sold to individual passengers through the use of major credit cards. These receivables are short-term, mostly settled within seven days after sale. Bad debt losses, which have been minimal in the past, have been considered in establishing allowances for doubtful accounts.
Maintenance, Materials and Repairs	(l) Maintenance, Materials and Repairs Maintenance and repair costs for owned and leased flight equipment are charged to operating expense as incurred, except costs incurred for maintenance and repair under flight hour maintenance contract agreements, which are accrued based on contractual terms when an obligation exists.
Selling Expenses	(m) Selling Expenses
Share-based Compensation	(n) Share-based Compensation We account for our share-based compensation expense based on the fair value of the stock award at the time of grant, which is recognized ratably over the vesting period of the stock award. The majority of our stock awards are time vested restricted stock units, and the fair value of such awards is based on the market price of the underlying shares of AAG common stock on the date of grant. See Note 15 for further discussion of share-based compensation.
Foreign Currency Gains and Losses	(o) Foreign Currency Gains and Losses
Other Operating Expenses	(p) Other Operating Expenses Other operating expenses includes costs associated with ground and cargo handling, crew travel, aircraft food and catering, passenger accommodation, airport security, international navigation fees and certain general and administrative expenses.
Regional Expenses	(q) Regional Expenses
American Airlines, Inc. [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Basis of Presentation	(a) Basis of Presentation American Airlines, Inc. (American) is a Delaware corporation whose primary business activity is the operation of a major network air carrier. American is the principal wholly-owned subsidiary of American Airlines Group Inc. (AAG), which owns all of American’s outstanding common stock, par value $1.00 per share. On December 9, 2013, a subsidiary of AMR Corporation (AMR) merged with and into US Airways Group, Inc. (US Airways Group), a Delaware corporation, which survived as a wholly-owned subsidiary of AAG, and AAG emerged from Chapter 11 (the Merger). Upon closing of the Merger and emergence from Chapter 11, AMR changed its name to American Airlines Group Inc. All significant intercompany transactions have been eliminated. The preparation of financial statements in accordance with accounting principles generally accepted in the United States (GAAP) requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, revenues and expenses, and the disclosure of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates. The most significant areas of judgment relate to passenger revenue recognition, impairment of goodwill, impairment of long-lived and intangible assets, the loyalty program, as well as pension and retiree medical and other postretirement benefits.
Recent Accounting Pronouncements	(b) Recent Accounting Pronouncements ASU 2016-02: Leases (Topic 842) (the New Lease Standard) The New Lease Standard requires lessees to recognize a lease liability and a right-of-use (ROU) asset on the balance sheet for operating leases. Accounting for finance leases is substantially unchanged. The New Lease Standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. In the fourth quarter of 2018, American elected to early adopt the New Lease Standard as of January 1, 2018 using a modified retrospective transition, with the cumulative-effect adjustment to the opening balance of retained earnings as of the effective date (the effective date method). Under the effective date method, financial results reported in periods prior to 2018 are unchanged. American also elected the package of practical expedients, which among other things, does not require reassessment of lease classification. The adoption of the New Lease Standard had a significant impact on American’s consolidated balance sheet due to the recognition of approximately $10 billion of lease liabilities with corresponding right-of-use assets for operating leases. Additionally, American recognized a $197 million cumulative effect adjustment credit, net of tax, to retained earnings. The adjustment to retained earnings was driven principally by sale-leaseback transactions including the recognition of unamortized deferred aircraft sale-leaseback gains. Prior to the adoption of the New Lease Standard, gains on sale-leaseback transactions were generally deferred and recognized in the income statement over the lease term. Under the New Lease Standard, gains on sale-leaseback transactions (subject to adjustment for off-market terms) are recognized immediately. ASU 2018-02: Income Statement – Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income This ASU provides the option to reclassify stranded tax effects within accumulated other comprehensive income to retained earnings due to the U.S. federal corporate income tax rate change as a result of H.R. 1, the 2017 Tax Cuts and Jobs Act (the 2017 Tax Act). The amount of the reclassification is the difference between the amount initially charged or credited directly to other comprehensive income at the previous U.S. federal corporate income tax rate that remains in accumulated other comprehensive income and the amount that would have been charged or credited directly to other comprehensive income using the newly enacted U.S. federal corporate income tax rate, excluding the effect of any valuation allowance previously charged to income from continuing operations. This standard is effective for interim and annual reporting periods beginning after December 15, 2018. In the first quarter of 2019, American adopted this standard retrospectively as of December 22, 2017, the date the 2017 Tax Act was enacted, which resulted in the recast of prior reporting periods. As a result of the adoption, American reclassified $622 million of stranded tax effects principally related to its pension plans from accumulated other comprehensive loss to retained earnings. ASU 2016-13: Financial Instruments – Credit Losses (Topic 326) This ASU requires the use of an expected loss model for certain types of financial instruments and requires consideration of a broader range of reasonable and supportable information to calculate credit loss estimates. For trade receivables, loans and held-to -
Short-term Investments	(c) Short-term Investments Short-term investments are classified as available-for-sale and stated at fair value. Realized gains and losses are recorded in nonoperating expense on American’s consolidated statements of operations. Unrealized gains and losses are recorded in accumulated other comprehensive loss on American’s consolidated balance sheets.
Restricted Cash and Short-term Investments	(d) Restricted Cash and Short-term Investments American has restricted cash and short-term investments related primarily to collateral held to support workers’ compensation obligations.
Aircraft Fuel, Spare Parts, and Supplies, Net	(e) Aircraft Fuel, Spare Parts and Supplies, Net Aircraft fuel is recorded on a first-in, first-out basis. Spare parts and supplies are recorded at average costs less an allowance for obsolescence. These items are expensed when used.
Operating Property and Equipment	(f) Operating Property and Equipment Operating property and equipment is recorded at cost and depreciated or amortized to residual values over the asset’s estimated useful life or the lease term, whichever is less, using the straight-line method. Residual values for aircraft, engines and related rotable parts are generally 5% to 10% of original cost. Costs of major improvements that enhance the usefulness of the asset are capitalized and depreciated or amortized over the estimated useful life of the asset or the lease term, whichever is less. The estimated useful lives for the principal property and equipment classifications are as follows: Principal Property and Equipment Classification Estimated Useful Life Aircraft, engines and related rotable parts 20 – 30 years Buildings and improvements 5 – 30 years Furniture, fixtures and other equipment 3 – 10 years Capitalized software 5 – 10 years American assesses impairment of operating property and equipment when events and circumstances indicate that the assets may be impaired. An asset or group of assets is considered impaired when the undiscounted cash flows estimated to be generated by the assets are less than the carrying amount of the assets and the net book value of the assets exceeds their estimated fair value. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets. Assets to be disposed of are reported at the lower of the carrying amount or fair value less the cost to sell.
Leases	(g) Leases American determines if an arrangement is a lease at inception. Operating leases are included in operating lease right-of-use (ROU) assets, current operating lease liabilities and noncurrent operating lease liabilities in American’s consolidated balance sheet. Finance leases are included in property and equipment, current maturities of long-term debt and finance leases and long-term debt and finance leases, net of current maturities, in American’s consolidated balance sheets. ROU assets represent American’s right to use an underlying asset for the lease term and lease liabilities represent its obligation to make lease payments arising from the lease. ROU assets and liabilities are recognized at the lease commencement date based on the estimated present value of lease payments over the lease term. American uses its estimated incremental borrowing rate, which is derived from information available at the lease commencement date , in determining the present value of lease payments. American gives consideration to its recent debt issuances as well as publicly available data for instruments with similar characteristics when calculating its incremental borrowing rates. American’s lease term includes options to extend the lease when it is reasonably certain that it will exercise that option. Leases with a term of 12 months or less are not recorded on the balance sheet. American’s lease agreements do not contain any residual value guarantees. Under certain of American’s capacity purchase agreements with third-party regional carriers, American does not own the underlying aircraft. However, since American controls the marketing, scheduling, ticketing, pricing and seat inventories of these aircraft and therefore control the asset, the aircraft is deemed to be leased for accounting purposes. For these capacity purchase agreements, American accounts for the lease and non-lease components separately. The lease component consists of the aircraft and the non-lease components consist of services, such as the crew and maintenance. American allocates the consideration in the capacity purchase agreements to the lease and non-lease components using their estimated relative standalone prices. See Note 10(b) for additional information on its capacity purchase agreements . For real estate, American accounts for the lease and non-lease components as a single lease component.
Income Taxes	(h) Income Taxes Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are recorded net as noncurrent deferred income taxes. American provides a valuation allowance for its deferred tax assets when it is more likely than not that some portion, or all of its deferred tax assets, will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income. American considers all available positive and negative evidence and makes certain assumptions in evaluating the realizability of its deferred tax assets. Many factors are considered that impact American’s assessment of future profitability, including conditions which are beyond American’s control, such as the health of the economy, the availability and price volatility of aircraft fuel and travel demand.
Goodwill	(i) Goodwill Goodwill represents the excess of the purchase price over the fair value of the net assets acquired and liabilities assumed. Goodwill is not amortized but assessed for impairment annually on October 1 or more frequently if events or circumstances indicate that goodwill may be impaired. American has one consolidated reporting unit.
Other Intangibles, Net	Certain domestic airport slots and airport gate leasehold rights are amortized on a straight-line basis over 25 years . The customer relationships and marketing agreements were identified as intangible assets subject to amortization and are amortized on a straight-line basis over approximately nine years and 30 years , respectively. Tradenames are fully amortized. Indefinite-Lived Intangible Assets (j) Other Intangibles, Net Intangible assets consist primarily of domestic airport slots, customer relationships, marketing agreements, international slots and route authorities, airport gate leasehold rights and tradenames. Definite-Lived Intangible Assets Definite-lived intangible assets are amortized over their respective estimated useful lives and reviewed for impairment whenever events or changes in circumstances indicate that the carrying value may not be recoverable.
Revenue Recognition	(k) Revenue Recognition Revenue American attributes passenger revenue by geographic region based upon the origin and destination of each flight segment. Passenger Revenue American recognizes all revenues generated from transportation on American and its regional flights operated under the brand name American Eagle, including associated baggage fees, ticketing change fees and other inflight services, as passenger revenue when transportation is provided. Ticket and other related sales for transportation that has not yet been provided are initially deferred and recorded as air traffic liability on American’s consolidated balance sheets. The air traffic liability principally represents tickets sold for future travel on American and partner airlines, as well as estimated future refunds and exchanges of tickets sold for past travel. The majority of tickets sold are nonrefundable. A small percentage of tickets, some of which are partially used tickets, expire unused. Due to complex pricing structures, refund and exchange policies, and interline agreements with other airlines, certain amounts are recognized in passenger revenue using estimates regarding both the timing of the revenue recognition and the amount of revenue to be recognized. These estimates are generally based on the analysis of American’s historical data. American has consistently applied this accounting method to estimate revenue from unused tickets at the date of travel. Estimated future refunds and exchanges included in the air traffic liability are routinely evaluated based on subsequent activity to validate the accuracy of American’s estimates. Any adjustments resulting from periodic evaluations of the estimated air traffic liability are included in passenger revenue during the period in which the evaluations are completed. Various taxes and fees assessed on the sale of tickets to end customers are collected by American as an agent and remitted to taxing authorities. These taxes and fees have been presented on a net basis in the accompanying consolidated statements of operations and recorded as a liability until remitted to the appropriate taxing authority. Loyalty Revenue American currently operates the loyalty program, AAdvantage. This program awards mileage credits to passengers who fly on American, any one world airline or other partner airlines, or by using the services of other program participants, such as the Citi and Barclaycard US co-branded credit cards, and certain hotels and car rental companies. Mileage credits can be redeemed for travel on American and other participating partner airlines, as well as other non-air travel awards such as hotels and rental cars. For mileage credits earned by AAdvantage loyalty program members, American applies the deferred revenue method. Mileage credits earned through travel For mileage credits earned through travel, American applies a relative selling price approach whereby the total amount collected from each passenger ticket sale is allocated between the air transportation and the mileage credits earned. The portion of each passenger ticket sale attributable to mileage credits earned is initially deferred and then recognized in passenger revenue when mileage credits are redeemed and transportation is provided. The estimated selling price of mileage credits is determined using an equivalent ticket value approach, which uses historical data, including award redemption patterns by geographic region and class of service, as well as similar fares as those used to settle award redemptions. The estimated selling price of miles is adjusted for an estimate of miles that will not be redeemed based on historical redemption patterns. Mileage credits sold to co-branded credit cards and other partners American sells mileage credits to participating airline partners and non-airline business partners, including American’s co-branded credit card partners, under contracts with terms extending generally for one to seven years. Consideration received from the sale of mileage credits is variable and payment terms typically are within 30 days subsequent to the month of mileage sale. Sales of mileage credits to non-airline business partners are comprised of two components, transportation and marketing. American allocates the consideration received from these sales of mileage credits based on the relative selling price of each product or service delivered. American’s most significant partner agreements are its co-branded credit card agreements with Citi and Barclaycard US that American entered into in 2016. American identified the following revenue elements in these co-branded credit card agreements: the transportation component; and the use of intellectual property, including the American brand and access to loyalty program member lists, which is the predominant element in the agreements, as well as advertising (collectively, the marketing component). Accordingly, American recognizes the marketing component in other revenue in the period of the mileage sale following the sales-based royalty method. The transportation component represents the estimated selling price of future travel awards and is determined using the same equivalent ticket value approach described above. The portion of each mileage credit sold attributable to transportation is initially deferred and then recognized in passenger revenue when mileage credits are redeemed and transportation is provided. For the portion of American’s outstanding mileage credits that it estimates will not be redeemed, American recognizes the associated value proportionally as the remaining mileage credits are redeemed. American’s estimates are based on analysis of historical redemptions. Cargo Revenue Cargo revenue is recognized when American provides the transportation. Other Revenue Other revenue includes revenue associated with American’s loyalty program, which is comprised principally of the marketing component of mileage sales to co-branded credit card and other partners and other marketing related payments. Loyalty revenue included in other revenue was $2.4 billion for both years ended December 31, 2019 and 2018 and $2.1 billion for 2017 . The accounting and recognition for the loyalty program marketing services are discussed above in “ Loyalty Revenue .” The remaining amounts included within other revenue relate to airport clubs, advertising and vacation-related services. Contract Balances American’s significant contract liabilities are comprised of (1) outstanding loyalty program mileage credits that may be redeemed for future travel and other non-air travel awards, reported as loyalty program liability on American’s consolidated balance sheets and (2) ticket sales for transportation that has not yet been provided, reported as air traffic liability on American’s consolidated balance sheets. The air traffic liability principally represents tickets sold for future travel on American and partner airlines, as well as estimated future refunds and exchanges of tickets sold for past travel. The balance in American’s air traffic liability also fluctuates with seasonal travel patterns. The contract duration of passenger tickets is one year . Accordingly, any revenue associated with tickets sold for future travel will be recognized within 12 months. For 2019 , $3.3 billion of revenue was recognized in passenger revenue that was included in American’s air traffic liability at December 31, 2018 . With respect to contract receivables, reflected as accounts receivable, net on the accompanying consolidated balance sheets, these primarily include receivables for tickets sold to individual passengers through the use of major credit cards. These receivables are short-term, mostly settled within seven days after sale. Bad debt losses, which have been minimal in the past, have been considered in establishing allowances for doubtful accounts.
Maintenance, Materials and Repairs	(l) Maintenance, Materials and Repairs Maintenance and repair costs for owned and leased flight equipment are charged to operating expense as incurred, except costs incurred for maintenance and repair under flight hour maintenance contract agreements, which are accrued based on contractual terms when an obligation exists.
Selling Expenses	(m) Selling Expenses
Share-based Compensation	(n) Share-based Compensation American accounts for its share-based compensation expense based on the fair value of the stock award at the time of grant, which is recognized ratably over the vesting period of the stock award. The majority of American’s stock awards are time vested restricted stock units, and the fair value of such awards is based on the market price of the underlying shares of AAG common stock on the date of grant. See Note 13 for further discussion of share-based compensation.
Foreign Currency Gains and Losses	(o) Foreign Currency Gains and Losses
Other Operating Expenses	(p) Other Operating Expenses Other operating expenses includes costs associated with ground and cargo handling, crew travel, aircraft food and catering, passenger accommodation, airport security, international navigation fees and certain general and administrative expenses.
Regional Expenses	(q) Regional Expenses

Basis of Presentation and Sum_3

Basis of Presentation and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2019
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Schedule of Estimated Useful Lives of Principal Property and Equipment	The estimated useful lives for the principal property and equipment classifications are as follows: Principal Property and Equipment Classification Estimated Useful Life Aircraft, engines and related rotable parts 20 – 30 years Buildings and improvements 5 – 30 years Furniture, fixtures and other equipment 3 – 10 years Capitalized software 5 – 10 years
Schedule of Amortizable Intangible Assets	The following table provides information relating to our amortizable intangible assets as of December 31, 2019 and 2018 (in millions): December 31, 2019 2018 Domestic airport slots $ 365 $ 365 Customer relationships 300 300 Marketing agreements 105 105 Tradenames 35 35 Airport gate leasehold rights 137 137 Accumulated amortization (704 ) (663 ) Total $ 238 $ 279
Schedule of Future Amortization Expense	We expect to record annual amortization expense for these intangible assets as follows (in millions): 2020 $ 41 2021 41 2022 41 2023 7 2024 7 2025 and thereafter 101 Total $ 238
Disaggregation of Revenue	The following are the significant categories comprising our reported operating revenues (in millions): Year Ended December 31, 2019 2018 2017 Passenger revenue: Passenger travel $ 38,831 $ 37,457 $ 36,152 Loyalty revenue - travel (1) 3,179 3,219 2,979 Total passenger revenue 42,010 40,676 39,131 Cargo 863 1,013 890 Other: Loyalty revenue - marketing services 2,361 2,352 2,124 Other revenue 534 500 477 Total other revenue 2,895 2,852 2,601 Total operating revenues $ 45,768 $ 44,541 $ 42,622 (1) Loyalty revenue included in passenger revenue is principally comprised of mileage credit redemptions earned through travel or from co-branded credit card and other partners. See “ Loyalty Revenue ” below for further discussion on these mileage credits. The following is our total passenger revenue by geographic region (in millions): Year Ended December 31, 2019 2018 2017 Domestic $ 30,881 $ 29,573 $ 28,749 Latin America 5,047 5,125 4,840 Atlantic 4,624 4,376 4,028 Pacific 1,458 1,602 1,514 Total passenger revenue $ 42,010 $ 40,676 $ 39,131
Schedule of Contract Balances	Changes in loyalty program liability are as follows (in millions): Balance at December 31, 2018 $ 8,539 Deferral of revenue 3,438 Recognition of revenue (1) (3,362 ) Balance at December 31, 2019 (2) $ 8,615 (1) Principally relates to revenue recognized from the redemption of mileage credits for both air and non-air travel awards. Mileage credits are combined in one homogenous pool and are not separately identifiable. As such, the revenue is comprised of miles that were part of the loyalty program deferred revenue balance at the beginning of the period, as well as miles that were issued during the period. (2) Mileage credits can be redeemed at any time and do not expire as long as that AAdvantage member has any type of qualifying activity at least every 18 months . As of December 31, 2019 , our current loyalty program liability was $3.2 billion and represents our current estimate of revenue expected to be recognized in the next 12 months based on historical trends, with the balance reflected in long-term loyalty program liability expected to be recognized as revenue in periods thereafter. December 31, 2019 2018 (in millions) Loyalty program liability $ 8,615 $ 8,539 Air traffic liability 4,808 4,339 Total $ 13,423 $ 12,878
Components of Regional Expenses	Regional expenses consist of the following (in millions): Year Ended December 31, 2019 2018 2017 Aircraft fuel and related taxes $ 1,869 $ 1,843 $ 1,382 Salaries, wages and benefits 1,781 1,591 1,452 Capacity purchases from third-party regional carriers (1) 1,398 1,431 1,581 Maintenance, materials and repairs 403 340 281 Other rent and landing fees 651 610 625 Aircraft rent 29 32 35 Selling expenses 402 369 361 Depreciation and amortization 336 318 315 Special items, net 6 6 22 Other 626 593 492 Total regional expenses $ 7,501 $ 7,133 $ 6,546 (1) In 2019 , 2018 , and 2017 , we recognized $590 million , $565 million and $544 million , respectively, of expense under our capacity purchase agreement with Republic Airline Inc. (Republic). We hold a 25% equity interest in Republic Airways Holdings Inc. (Republic Holdings), the parent company of Republic.
American Airlines, Inc. [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Schedule of Estimated Useful Lives of Principal Property and Equipment	The estimated useful lives for the principal property and equipment classifications are as follows: Principal Property and Equipment Classification Estimated Useful Life Aircraft, engines and related rotable parts 20 – 30 years Buildings and improvements 5 – 30 years Furniture, fixtures and other equipment 3 – 10 years Capitalized software 5 – 10 years
Schedule of Amortizable Intangible Assets	The following table provides information relating to American’s amortizable intangible assets as of December 31, 2019 and 2018 (in millions): December 31, 2019 2018 Domestic airport slots $ 365 $ 365 Customer relationships 300 300 Marketing agreements 105 105 Tradenames 35 35 Airport gate leasehold rights 137 137 Accumulated amortization (704 ) (663 ) Total $ 238 $ 279
Schedule of Future Amortization Expense	American expects to record annual amortization expense for these intangible assets as follows (in millions): 2020 $ 41 2021 41 2022 41 2023 7 2024 7 2025 and thereafter 101 Total $ 238
Disaggregation of Revenue	The following are the significant categories comprising American’s reported operating revenues (in millions): Year Ended December 31, 2019 2018 2017 Passenger revenue: Passenger travel $ 38,831 $ 37,457 $ 36,152 Loyalty revenue - travel (1) 3,179 3,219 2,979 Total passenger revenue 42,010 40,676 39,131 Cargo 863 1,013 890 Other: Loyalty revenue - marketing services 2,361 2,352 2,124 Other revenue 527 489 465 Total other revenue 2,888 2,841 2,589 Total operating revenues $ 45,761 $ 44,530 $ 42,610 (1) Loyalty revenue included in passenger revenue is principally comprised of mileage credit redemptions earned through travel or from co-branded credit card and other partners. See “ Loyalty Revenue” below for further discussion on these mileage credits. The following is American’s total passenger revenue by geographic region (in millions): Year Ended December 31, 2019 2018 2017 Domestic $ 30,881 $ 29,573 $ 28,749 Latin America 5,047 5,125 4,840 Atlantic 4,624 4,376 4,028 Pacific 1,458 1,602 1,514 Total passenger revenue $ 42,010 $ 40,676 $ 39,131
Schedule of Contract Balances	Changes in loyalty program liability are as follows (in millions): Balance at December 31, 2018 $ 8,539 Deferral of revenue 3,438 Recognition of revenue (1) (3,362 ) Balance at December 31, 2019 (2) $ 8,615 (1) Principally relates to revenue recognized from the redemption of mileage credits for both air and non-air travel awards. Mileage credits are combined in one homogenous pool and are not separately identifiable. As such, the revenue is comprised of miles that were part of the loyalty program deferred revenue balance at the beginning of the period, as well as miles that were issued during the period. (2) Mileage credits can be redeemed at any time and do not expire as long as that AAdvantage member has any type of qualifying activity at least every 18 months . As of December 31, 2019 , American’s current loyalty program liability was $3.2 billion and represents American’s current estimate of revenue expected to be recognized in the next 12 months based on historical trends, with the balance reflected in long-term loyalty program liability expected to be recognized as revenue in periods thereafter. December 31, 2019 2018 (in millions) Loyalty program liability $ 8,615 $ 8,539 Air traffic liability 4,808 4,339 Total $ 13,423 $ 12,878
Components of Regional Expenses	Regional expenses consist of the following (in millions): Year Ended December 31, 2019 2018 2017 Aircraft fuel and related taxes $ 1,869 $ 1,843 $ 1,382 Salaries, wages and benefits 325 338 356 Capacity purchases from third-party regional carriers (1) 3,562 3,267 3,283 Maintenance, materials and repairs 30 8 7 Other rent and landing fees 621 583 602 Aircraft rent 29 27 27 Selling expenses 402 369 361 Depreciation and amortization 286 267 262 Special items, net — — 3 Other 394 362 289 Total regional expenses $ 7,518 $ 7,064 $ 6,572 (1) In 2019 , 2018 , and 2017 , American recognized $590 million , $565 million and $544 million , respectively, of expense under its capacity purchase agreement with Republic Airline Inc. (Republic). American holds a 25% equity interest in Republic Airways Holdings Inc. (Republic Holdings), the parent company of Republic.

Special Items, Net (Tables)

Special Items, Net (Tables)	12 Months Ended
	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Components of Special Items, Net Included in Consolidated Statements of Operations	Special items, net on our consolidated statements of operations consisted of the following (in millions): Year Ended December 31, 2019 2018 2017 Fleet restructuring expenses (1) $ 271 $ 422 $ 232 Fleet impairment (2) 213 — — Merger integration expenses (3) 191 268 273 Litigation reserve adjustments (53 ) 45 — Mark-to-market adjustments on bankruptcy obligations, net (4) (11 ) (76 ) 27 Severance expenses (5) 11 58 — Intangible asset impairment (6) — 26 — Labor contract expenses — 13 46 Employee 2017 Tax Act bonus expense (7) — — 123 Other operating charges, net 13 31 11 Mainline operating special items, net 635 787 712 Regional operating special items, net 6 6 22 Operating special items, net 641 793 734 Debt refinancing and extinguishment charges 16 13 22 Mark-to-market adjustments on equity and other investments, net (8) (5 ) 104 — Other nonoperating income, net (8 ) (4 ) — Nonoperating special items, net 3 113 22 Income tax special items (9) — 18 — Impact of the 2017 Tax Act (10) — — 823 Income tax special items, net — 18 823 (1) Fleet restructuring expenses principally included accelerated depreciation and rent expense for aircraft and related equipment grounded or expected to be grounded earlier than planned. (2) Fleet impairment principally includes a non-cash write-down of aircraft related to the planned retirement of our Embraer E190 fleet. (3) Merger integration expenses included costs associated with integration projects, principally our technical operations, flight attendant, human resources and payroll systems. (4) Bankruptcy obligations that will be settled in shares of our common stock are marked-to-market based on our stock price. (5) Severance expenses primarily included costs associated with reductions of management and support staff team members. (6) Intangible asset impairment includes a non-cash charge to write-off our Brazil route authority as a result of the U.S.-Brazil open skies agreement. (7) Employee bonus expense included costs related to the $1,000 cash bonus and associated payroll taxes granted to mainline employees in recognition of the 2017 Tax Act. (8) Mark-to-market adjustments on equity and other investments, net primarily relates to net unrealized gains and losses associated with our equity investment in China Southern Airlines Company Limited (China Southern Airlines). (9) Income tax special items for 2018 included an $18 million charge related to an international income tax matter. (10) Impact of the 2017 Tax Act includes an $823 million non-cash charge to income tax expense to reflect the impact of lower corporate income tax rates on our deferred tax asset and liabilities resulting from the 2017 Tax Act, which reduced the federal corporate income tax rate from 35% to 21%.
American Airlines, Inc. [Member]
Restructuring Cost and Reserve [Line Items]
Components of Special Items, Net Included in Consolidated Statements of Operations	Special items, net on American’s consolidated statements of operations consisted of the following (in millions): Year Ended December 31, 2019 2018 2017 Fleet restructuring expenses (1) $ 271 $ 422 $ 232 Fleet impairment (2) 213 — — Merger integration expenses (3) 191 268 273 Litigation reserve adjustments (53 ) 45 — Mark-to-market adjustments on bankruptcy obligations, net (4) (11 ) (76 ) 27 Severance expenses (5) 11 58 — Intangible asset impairment (6) — 26 — Labor contract expenses — 13 46 Employee 2017 Tax Act bonus expense (7) — — 123 Other operating charges, net 13 31 11 Mainline operating special items, net 635 787 712 Regional operating special items, net — — 3 Operating special items, net 635 787 715 Debt refinancing and extinguishment charges 16 13 22 Mark-to-market adjustments on equity and other investments, net (8) (5 ) 104 — Other nonoperating income, net — (4 ) — Nonoperating special items, net 11 113 22 Income tax special items (9) — 18 — Impact of the 2017 Tax Act (10) — — 924 Income tax special items, net — 18 924 (1) Fleet restructuring expenses principally included accelerated depreciation and rent expense for aircraft and related equipment grounded or expected to be grounded earlier than planned. (2) Fleet impairment principally includes a non-cash write-down of aircraft related to the planned retirement of American’s Embraer E190 fleet. (3) Merger integration expenses included costs associated with integration projects, principally American's technical operations, flight attendant, human resources and payroll systems. (4) Bankruptcy obligations that will be settled in shares of AAG common stock are marked-to-market based on AAG’s stock price. (5) Severance expenses primarily included costs associated with reductions of management and support staff team members. (6) Intangible asset impairment includes a non-cash charge to write-off American’s Brazil route authority as a result of the U.S.-Brazil open skies agreement. (7) Employee bonus expense included costs related to the $1,000 cash bonus and associated payroll taxes granted to mainline employees in recognition of the 2017 Tax Act. (8) Mark-to-market adjustments on equity and other investments, net primarily relates to net unrealized gains and losses associated with American’s equity investment in China Southern Airlines Company Limited (China Southern Airlines). (9) Income tax special items for 2018 included an $18 million charge related to an international income tax matter. (10) Impact of the 2017 Tax Act includes a $924 million non-cash charge to income tax expense to reflect the impact of lower corporate income tax rates on the Company’s deferred tax asset and liabilities resulting from the 2017 Tax Act, which reduced the federal corporate income tax rate from 35% to 21%.

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	12 Months Ended
	Dec. 31, 2019
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings per Common Share	The following table sets forth the computation of basic and diluted earnings per common share (EPS) (in millions, except share and per share amounts): Year Ended December 31, 2019 2018 2017 Basic EPS: Net income $ 1,686 $ 1,412 $ 1,282 Weighted average common shares outstanding (in thousands) 443,363 464,236 489,164 Basic EPS $ 3.80 $ 3.04 $ 2.62 Diluted EPS: Net income for purposes of computing diluted EPS $ 1,686 $ 1,412 $ 1,282 Share computation for diluted EPS (in thousands): Basic weighted average common shares outstanding 443,363 464,236 489,164 Dilutive effect of stock awards 906 1,424 2,528 Diluted weighted average common shares outstanding 444,269 465,660 491,692 Diluted EPS $ 3.79 $ 3.03 $ 2.61 Restricted stock unit awards excluded from the calculation of diluted EPS because inclusion would be antidilutive (in thousands) 2,520 1,266 328

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2019
Debt Instrument [Line Items]
Schedule of Long-Term Debt	Long-term debt included on our consolidated balance sheets consisted of (in millions): December 31, 2019 2018 Secured 2013 Credit Facilities, variable interest rate of 3.54%, installments through 2025 (a) $ 1,807 $ 1,825 2014 Credit Facilities, variable interest rate of 3.72%, installments through 2021 (a) 1,202 1,215 April 2016 Credit Facilities, variable interest rate of 3.80%, installments through 2023 (a) 970 980 December 2016 Credit Facilities, variable interest rate of 3.74%, installments through 2023 (a) 1,213 1,225 Enhanced equipment trust certificates (EETCs), fixed interest rates ranging from 3.00% to 8.39%, averaging 4.05%, maturing from 2020 to 2032 (b) 11,933 11,648 Equipment loans and other notes payable, fixed and variable interest rates ranging from 2.99% to 7.31%, averaging 3.45%, maturing from 2020 to 2031 (c) 4,727 5,060 Special facility revenue bonds, fixed interest rates ranging from 5.00% to 8.00%, maturing from 2020 to 2031 754 798 22,606 22,751 Unsecured 4.625% senior notes, interest only payments until due in March 2020 (d) 500 500 5.000% senior notes, interest only payments until due in June 2022 (d) 750 — 5.50% senior notes — 750 1,250 1,250 Total long-term debt 23,856 24,001 Less: Total unamortized debt discount, premium and issuance costs 211 222 Less: Current maturities 2,749 3,213 Long-term debt, net of current maturities $ 20,896 $ 20,566
Schedule of Credit Facilities	The table below shows the maximum availability under revolving credit facilities, all of which were undrawn, as of December 31, 2019 (in millions): 2013 Revolving Facility $ 750 2014 Revolving Facility 1,643 April 2016 Revolving Facility 450 Other Short-term Revolving Facility 400 Total $ 3,243 Certain details of our 2013 Credit Facilities, 2014 Credit Facilities, April 2016 Credit Facilities and December 2016 Credit Facilities (collectively referred to as the Credit Facilities) are shown in the table below as of December 31, 2019 : 2013 Credit Facilities 2014 Credit Facilities April 2016 Credit Facilities December 2016 Credit Facilities 2013 Replacement Term Loan 2013 2014 Term Loan 2014 April 2016 Term Loan April 2016 December 2016 Term Loan Aggregate principal issued or credit facility availability (in millions) $1,919 $750 $1,250 $1,643 $1,000 $450 $1,250 Principal outstanding or drawn (in millions) $1,807 $— $1,202 $— $970 $— $1,213 Maturity date June 2025 October 2024 October 2021 October 2024 April 2023 October 2024 December 2023 LIBOR margin 1.75% 2.00% 2.00% 2.00% 2.00% 2.00% 2.00%
Schedule of Maturities of Long-Term Debt and Capital Lease Obligations	At December 31, 2019 , the maturities of long-term debt are as follows (in millions): 2020 $ 2,798 2021 3,510 2022 2,303 2023 4,074 2024 1,523 2025 and thereafter 9,648 Total $ 23,856
Schedule of Collateral Coverage Tests	Specifically, we are required to meet certain collateral coverage tests on an annual basis for our Credit Facilities, as described below: 2013 Credit Facilities 2014 Credit Facilities April 2016 Credit Facilities December 2016 Credit Facilities Frequency of Appraisals of Appraised Collateral Annual Annual Annual Annual LTV Requirement 1.6x Collateral valuation to amount of debt outstanding (62.5% LTV) 1.6x Collateral valuation to amount of debt outstanding (62.5% LTV) 1.6x Collateral valuation to amount of debt outstanding (62.5% LTV) 1.6x Collateral valuation to amount of debt outstanding (62.5% LTV) LTV as of Last Measurement Date 36.2% 17.7% 36.2% 53.6% Collateral Description Generally, certain slots, route authorities and airport gate leasehold rights used by American to operate all services between the U.S. and South America Generally, certain slots, route authorities and airport gate leasehold rights used by American to operate certain services between the U.S. and European Union (including London Heathrow) Generally, certain spare parts Generally, certain Ronald Reagan Washington National Airport (DCA) slots, certain La Guardia Airport (LGA) slots, certain simulators and certain leasehold rights
Secured Debt [Member] | Enhanced Equipment Trust Certificates (EETC) [Member]
Debt Instrument [Line Items]
Schedule of Long-Term Debt	Certain information regarding the 2019-1 Aircraft EETC equipment notes and remaining escrowed proceeds, as of December 31, 2019 , is set forth in the table below. 2019-1 Aircraft EETCs Series AA Series A Series B Aggregate principal issued $579 million $289 million $229 million Remaining escrowed proceeds $155 million $77 million $61 million Fixed interest rate per annum 3.15% 3.50% 3.85% Maturity date February 2032 February 2032 February 2028
Unsecured Debt [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Schedule of Long-Term Debt	The details of our 4.625% and 5.000% senior notes are shown in the table below as of December 31, 2019 : 4.625% Senior Notes 5.000% Senior Notes Aggregate principal issued and outstanding $500 million $750 million Maturity date March 2020 June 2022 Fixed interest rate per annum 4.625% 5.000% Interest payments Semi-annually in arrears in March and September Semi-annually in arrears in June and December
American Airlines, Inc. [Member]
Debt Instrument [Line Items]
Schedule of Long-Term Debt	Long-term debt included on American’s consolidated balance sheets consisted of (in millions): December 31, 2019 2018 Secured 2013 Credit Facilities, variable interest rate of 3.54%, installments through 2025 (a) $ 1,807 $ 1,825 2014 Credit Facilities, variable interest rate of 3.72%, installments through 2021 (a) 1,202 1,215 April 2016 Credit Facilities, variable interest rate of 3.80%, installments through 2023 (a) 970 980 December 2016 Credit Facilities, variable interest rate of 3.74%, installments through 2023 (a) 1,213 1,225 Enhanced equipment trust certificates (EETCs), fixed interest rates ranging from 3.00% to 8.39%, averaging 4.05%, maturing from 2020 to 2032 (b) 11,933 11,648 Equipment loans and other notes payable, fixed and variable interest rates ranging from 2.99% to 7.31%, averaging 3.45%, maturing from 2020 to 2031 (c) 4,727 5,060 Special facility revenue bonds, fixed interest rates of 5.00%, maturing from 2020 to 2031 725 769 Total long-term debt 22,577 22,722 Less: Total unamortized debt discount, premium and issuance costs 205 219 Less: Current maturities 2,246 2,466 Long-term debt, net of current maturities $ 20,126 $ 20,037
Schedule of Credit Facilities	The table below shows the maximum availability under revolving credit facilities, all of which were undrawn, as of December 31, 2019 (in millions): 2013 Revolving Facility $ 750 2014 Revolving Facility 1,643 April 2016 Revolving Facility 450 Other Short-term Revolving Facility 400 Total $ 3,243 Certain details of American’s 2013 Credit Facilities, 2014 Credit Facilities, April 2016 Credit Facilities and December 2016 Credit Facilities (collectively referred to as the Credit Facilities) are shown in the table below as of December 31, 2019 : 2013 Credit Facilities 2014 Credit Facilities April 2016 Credit Facilities December 2016 Credit Facilities 2013 Replacement Term Loan 2013 2014 Term 2014 April 2016 April 2016 December 2016 Term Loan Aggregate principal issued or credit facility availability (in millions) $1,919 $750 $1,250 $1,643 $1,000 $450 $1,250 Principal outstanding or drawn (in millions) $1,807 $— $1,202 $— $970 $— $1,213 Maturity date June 2025 October 2024 October 2021 October 2024 April 2023 October 2024 December 2023 LIBOR margin 1.75% 2.00% 2.00% 2.00% 2.00% 2.00% 2.00%
Schedule of Maturities of Long-Term Debt and Capital Lease Obligations	At December 31, 2019 , the maturities of long-term debt are as follows (in millions): 2020 $ 2,293 2021 3,508 2022 1,551 2023 4,072 2024 1,521 2025 and thereafter 9,632 Total $ 22,577
Schedule of Collateral Coverage Tests	Specifically, American is required to meet certain collateral coverage tests on an annual basis for its Credit Facilities, as described below: 2013 Credit Facilities 2014 Credit Facilities April 2016 Credit Facilities December 2016 Credit Facilities Frequency of Appraisals of Appraised Collateral Annual Annual Annual Annual LTV Requirement 1.6x Collateral valuation to amount of debt outstanding (62.5% LTV) 1.6x Collateral valuation to amount of debt outstanding (62.5% LTV) 1.6x Collateral valuation to amount of debt outstanding (62.5% LTV) 1.6x Collateral valuation to amount of debt outstanding (62.5% LTV) LTV as of Last Measurement Date 36.2% 17.7% 36.2% 53.6% Collateral Description Generally, certain slots, route authorities and airport gate leasehold rights used by American to operate all services between the U.S. and South America Generally, certain slots, route authorities and airport gate leasehold rights used by American to operate certain services between the U.S. and European Union (including London Heathrow) Generally, certain spare parts Generally, certain Ronald Reagan Washington National Airport (DCA) slots, certain La Guardia Airport (LGA) slots, certain simulators and certain leasehold rights
American Airlines, Inc. [Member] | Secured Debt [Member] | Enhanced Equipment Trust Certificates (EETC) [Member]
Debt Instrument [Line Items]
Schedule of Long-Term Debt	Certain information regarding the 2019-1 Aircraft EETC equipment notes and remaining escrowed proceeds, as of December 31, 2019 , is set forth in the table below. 2019-1 Aircraft EETCs Series AA Series A Series B Aggregate principal issued $579 million $289 million $229 million Remaining escrowed proceeds $155 million $77 million $61 million Fixed interest rate per annum 3.15% 3.50% 3.85% Maturity date February 2032 February 2032 February 2028

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Components of Lease Expense	The components of lease expense were as follows (in millions): Year Ended December 31, 2019 2018 Operating lease cost $ 2,027 $ 1,907 Finance lease cost: Amortization of assets 79 78 Interest on lease liabilities 43 48 Variable lease cost 2,558 2,353 Total net lease cost $ 4,707 $ 4,386
Supplemental Balance Sheet Information	Supplemental balance sheet information related to leases was as follows (in millions, except lease term and discount rate): December 31, 2019 2018 Operating leases: Operating lease ROU assets $ 8,737 $ 9,151 Current operating lease liabilities $ 1,708 $ 1,654 Noncurrent operating lease liabilities 7,421 7,902 Total operating lease liabilities $ 9,129 $ 9,556 Finance leases: Property and equipment, at cost $ 954 $ 936 Accumulated amortization (447 ) (391 ) Property and equipment, net $ 507 $ 545 Current finance lease liabilities $ 112 $ 81 Noncurrent finance lease liabilities 558 613 Total finance lease liabilities $ 670 $ 694 Weighted average remaining lease term (in years): Operating leases 7.4 7.6 Finance leases 6.2 7.4 Weighted average discount rate: Operating leases 4.7 % 4.6 % Finance leases 6.2 % 6.5 %
Supplemental Cash Flow and Other Information	Year Ended December 31, 2019 2018 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 2,013 $ 1,931 Operating cash flows from finance leases 43 48 Financing cash flows from finance leases 83 78 Non-cash transactions: ROU assets acquired through operating leases 1,145 1,292 Operating lease conversion to finance lease 41 — Property and equipment acquired through finance leases 20 — Gain on sale leaseback transactions, net 107 59
Maturities of Operating Lease Liabilities	Maturities of lease liabilities were as follows (in millions): December 31, 2019 Operating Leases Finance Leases 2020 $ 1,990 $ 153 2021 1,817 128 2022 1,620 132 2023 1,429 110 2024 1,030 116 2025 and thereafter 3,276 171 Total lease payments 11,162 810 Less: Imputed interest (2,033 ) (140 ) Total lease obligations 9,129 670 Less: Current obligations (1,708 ) (112 ) Long-term lease obligations $ 7,421 $ 558
Maturities of Finance Lease Liabilities	Maturities of lease liabilities were as follows (in millions): December 31, 2019 Operating Leases Finance Leases 2020 $ 1,990 $ 153 2021 1,817 128 2022 1,620 132 2023 1,429 110 2024 1,030 116 2025 and thereafter 3,276 171 Total lease payments 11,162 810 Less: Imputed interest (2,033 ) (140 ) Total lease obligations 9,129 670 Less: Current obligations (1,708 ) (112 ) Long-term lease obligations $ 7,421 $ 558
American Airlines, Inc. [Member]
Lessee, Lease, Description [Line Items]
Components of Lease Expense	The components of lease expense were as follows (in millions): Year Ended December 31, 2019 2018 Operating lease cost $ 2,012 $ 1,889 Finance lease cost: Amortization of assets 79 78 Interest on lease liabilities 43 48 Variable lease cost 2,542 2,353 Total net lease cost $ 4,676 $ 4,368
Supplemental Balance Sheet Information	Supplemental balance sheet information related to leases was as follows (in millions, except lease term and discount rate): December 31, 2019 2018 Operating leases: Operating lease ROU assets $ 8,694 $ 9,094 Current operating lease liabilities $ 1,695 $ 1,639 Noncurrent operating lease liabilities 7,388 7,857 Total operating lease liabilities $ 9,083 $ 9,496 Finance leases: Property and equipment, at cost $ 954 $ 936 Accumulated amortization (447 ) (391 ) Property and equipment, net $ 507 $ 545 Current finance lease liabilities $ 112 $ 81 Noncurrent finance lease liabilities 558 613 Total finance lease liabilities $ 670 $ 694 Weighted average remaining lease term (in years): Operating leases 7.4 7.6 Finance leases 6.2 7.4 Weighted average discount rate: Operating leases 4.7 % 4.6 % Finance leases 6.2 % 6.5 %
Supplemental Cash Flow and Other Information	Supplemental cash flow and other information related to leases was as follows (in millions): Year Ended December 31, 2019 2018 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 1,996 $ 1,914 Operating cash flows from finance leases 43 48 Financing cash flows from finance leases 83 78 Non-cash transactions: ROU assets acquired through operating leases 1,144 1,258 Operating lease conversion to finance lease 41 — Property and equipment acquired through finance leases 20 — Gain on sale leaseback transactions, net 107 59
Maturities of Operating Lease Liabilities	Maturities of lease liabilities were as follows (in millions): December 31, 2019 Operating Leases Finance Leases 2020 $ 1,974 $ 153 2021 1,804 128 2022 1,608 132 2023 1,423 110 2024 1,028 116 2025 and thereafter 3,268 171 Total lease payments 11,105 810 Less: Imputed interest (2,022 ) (140 ) Total lease obligations 9,083 670 Less: Current obligations (1,695 ) (112 ) Long-term lease obligations $ 7,388 $ 558
Maturities of Finance Lease Liabilities	Maturities of lease liabilities were as follows (in millions): December 31, 2019 Operating Leases Finance Leases 2020 $ 1,974 $ 153 2021 1,804 128 2022 1,608 132 2023 1,423 110 2024 1,028 116 2025 and thereafter 3,268 171 Total lease payments 11,105 810 Less: Imputed interest (2,022 ) (140 ) Total lease obligations 9,083 670 Less: Current obligations (1,695 ) (112 ) Long-term lease obligations $ 7,388 $ 558

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2019
Income Taxes [Line Items]
Components of Income Tax Provision	The significant components of the income tax provision were (in millions): Year Ended December 31, 2019 2018 2017 Current income tax provision: State and Local $ 2 $ 3 $ 10 Foreign 8 29 14 Current income tax provision 10 32 24 Deferred income tax provision: Federal 498 390 2,026 State and Local 62 50 63 Deferred income tax provision 560 440 2,089 Total income tax provision $ 570 $ 472 $ 2,113
Reconciliation of Income Tax Provision	The income tax provision differed from amounts computed at the statutory federal income tax rate as follows (in millions): Year Ended December 31, 2019 2018 2017 Statutory income tax provision $ 474 $ 396 $ 1,188 State income tax provision, net of federal tax effect 47 44 59 Book expenses not deductible for tax purposes 31 12 33 Foreign income taxes, net of federal tax effect 8 23 7 Change in valuation allowance 4 (6 ) (3 ) 2017 Tax Act — — 823 Other, net 6 3 6 Income tax provision $ 570 $ 472 $ 2,113
Deferred Tax Assets and Liabilities	The components of our deferred tax assets and liabilities were (in millions): December 31, 2019 2018 Deferred tax assets: Operating loss carryforwards $ 2,103 $ 2,343 Leases 2,077 2,189 Loyalty program liability 1,755 1,770 Pensions 1,229 1,430 Postretirement benefits other than pensions 145 145 Rent expense 126 136 Alternative minimum tax (AMT) credit carryforwards 90 175 Reorganization items 30 33 Other 613 631 Total deferred tax assets 8,168 8,852 Valuation allowance (34 ) (30 ) Net deferred tax assets 8,134 8,822 Deferred tax liabilities: Accelerated depreciation and amortization (5,196 ) (5,280 ) Leases (1,979 ) (2,081 ) Other (343 ) (326 ) Total deferred tax liabilities (7,518 ) (7,687 ) Net deferred tax asset $ 616 $ 1,135
American Airlines, Inc. [Member]
Income Taxes [Line Items]
Components of Income Tax Provision	The significant components of the income tax provision were (in millions): Year Ended December 31, 2019 2018 2017 Current income tax provision: State and Local $ 2 $ 3 $ 14 Foreign 8 28 10 Current income tax provision 10 31 24 Deferred income tax provision: Federal 567 453 2,176 State and Local 56 50 70 Deferred income tax provision 623 503 2,246 Total income tax provision $ 633 $ 534 $ 2,270
Reconciliation of Income Tax Provision	The income tax provision differed from amounts computed at the statutory federal income tax rate as follows (in millions): Year Ended December 31, 2019 2018 2017 Statutory income tax provision $ 547 $ 460 $ 1,244 State income tax provision, net of federal tax effect 41 46 53 Book expenses not deductible for tax purposes 29 10 30 Foreign income taxes, net of federal tax effect 8 22 6 Change in valuation allowance 5 (6 ) 4 2017 Tax Act — — 924 Other, net 3 2 9 Income tax provision $ 633 $ 534 $ 2,270
Deferred Tax Assets and Liabilities	The components of American’s deferred tax assets and liabilities were (in millions): December 31, 2019 2018 Deferred tax assets: Operating loss carryforwards $ 2,115 $ 2,420 Leases 2,067 2,176 Loyalty program liability 1,755 1,770 Pensions 1,219 1,421 Postretirement benefits other than pensions 145 145 Rent expense 126 136 Alternative minimum tax (AMT) credit carryforwards 118 231 Reorganization items 30 33 Other 569 588 Total deferred tax assets 8,144 8,920 Valuation allowance (24 ) (19 ) Net deferred tax assets 8,120 8,901 Deferred tax liabilities: Accelerated depreciation and amortization (5,153 ) (5,243 ) Leases (1,968 ) (2,068 ) Other (340 ) (321 ) Total deferred tax liabilities (7,461 ) (7,632 ) Net deferred tax asset $ 659 $ 1,269

Fair Value Measurements and O_2

Fair Value Measurements and Other Investments (Tables)	12 Months Ended
	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Summary of Assets Measured at Fair Value on Recurring Basis	Assets measured at fair value on a recurring basis are summarized below (in millions): Fair Value Measurements as of December 31, 2019 Total Level 1 Level 2 Level 3 Short-term investments (1), (2) : Money market funds $ 333 $ 333 $ — $ — Bank notes/certificates of deposit/time deposits 2,107 — 2,107 — Corporate obligations 1,021 — 1,021 — Repurchase agreements 85 — 85 — 3,546 333 3,213 — Restricted cash and short-term investments (1) 158 10 148 — Long-term investments (3) 204 204 — — Total $ 3,908 $ 547 $ 3,361 $ — Fair Value Measurements as of December 31, 2018 Total Level 1 Level 2 Level 3 Short-term investments (1) : Money market funds $ 16 $ 16 $ — $ — Bank notes/certificates of deposit/time deposits 2,436 — 2,436 — Corporate obligations 1,658 — 1,658 — Repurchase agreements 375 — 375 — 4,485 16 4,469 — Restricted cash and short-term investments (1) 154 12 142 — Long-term investments (3) 189 189 — — Total $ 4,828 $ 217 $ 4,611 $ — (1) Unrealized gains and losses on short-term investments are recorded in accumulated other comprehensive loss at each measurement date. (2) All short-term investments are classified as available-for-sale and stated at fair value. Our short-term investments as of December 31, 2019 mature in one year or less except for $1.1 billion of bank notes/certificates of deposit/time deposits and $95 million of corporate obligations. (3) Long-term investments primarily include our equity investment in China Southern Airlines, in which we presently own a 2.2% equity interest, and are classified in other assets on the consolidated balance sheets.
Schedule of Carrying Value and Estimated Fair Value of Long-Term Debt, Including Current Maturities	The carrying value and estimated fair value of our long-term debt, including current maturities, were as follows (in millions): December 31, 2019 December 31, 2018 Carrying Value Fair Value Carrying Value Fair Value Long-term debt, including current maturities $ 23,645 $ 24,508 $ 23,779 $ 23,775
American Airlines, Inc. [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Summary of Assets Measured at Fair Value on Recurring Basis	Assets measured at fair value on a recurring basis are summarized below (in millions): Fair Value Measurements as of December 31, 2019 Total Level 1 Level 2 Level 3 Short-term investments (1), (2) : Money market funds $ 331 $ 331 $ — $ — Bank notes/certificates of deposit/time deposits 2,106 — 2,106 — Corporate obligations 1,021 — 1,021 — Repurchase agreements 85 — 85 — 3,543 331 3,212 — Restricted cash and short-term investments (1) 158 10 148 — Long-term investments (3) 204 204 — — Total $ 3,905 $ 545 $ 3,360 $ — Fair Value Measurements as of December 31, 2018 Total Level 1 Level 2 Level 3 Short-term investments (1) : Money market funds $ 14 $ 14 $ — $ — Bank notes/certificates of deposit/time deposits 2,435 — 2,435 — Corporate obligations 1,658 — 1,658 — Repurchase agreements 375 — 375 — 4,482 14 4,468 — Restricted cash and short-term investments (1) 154 12 142 — Long-term investments (3) 189 189 — — Total $ 4,825 $ 215 $ 4,610 $ — (1) Unrealized gains and losses on short-term investments are recorded in accumulated other comprehensive loss at each measurement date. (2) All short-term investments are classified as available-for-sale and stated at fair value. American’s short-term investments as of December 31, 2019 mature in one year or less except for $1.1 billion of bank notes/certificates of deposit/time deposits and $95 million of corporate obligations. (3) Long-term investments primarily include American's equity investment in China Southern Airlines, in which American presently owns a 2.2% equity interest, and are classified in other assets on the consolidated balance sheets.
Schedule of Carrying Value and Estimated Fair Value of Long-Term Debt, Including Current Maturities	The carrying value and estimated fair value of American’s long-term debt, including current maturities, were as follows (in millions): December 31, 2019 December 31, 2018 Carrying Value Fair Value Carrying Value Fair Value Long-term debt, including current maturities $ 22,372 $ 23,196 $ 22,503 $ 22,497

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Schedule of Changes in Projected Benefit Obligations	The following tables provide a reconciliation of the changes in the pension and retiree medical and other postretirement benefits obligations, fair value of plan assets and a statement of funded status as of December 31, 2019 and 2018 : Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2019 2018 (In millions) Benefit obligation at beginning of period $ 16,378 $ 18,275 $ 837 $ 1,011 Service cost 2 3 3 5 Interest cost 703 674 33 35 Actuarial (gain) loss (1), (2) 1,965 (1,910 ) 20 (133 ) Settlements (2 ) (4 ) — — Benefit payments (689 ) (662 ) (74 ) (81 ) Other 1 2 5 — Benefit obligation at end of period $ 18,358 $ 16,378 $ 824 $ 837 Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2019 2018 (In millions) Fair value of plan assets at beginning of period $ 10,053 $ 11,395 $ 225 $ 295 Actual return (loss) on plan assets 2,305 (1,151 ) 41 (24 ) Employer contributions (3) 1,230 475 12 35 Settlements (2 ) (4 ) — — Benefit payments (689 ) (662 ) (74 ) (81 ) Fair value of plan assets at end of period $ 12,897 $ 10,053 $ 204 $ 225 Funded status at end of period $ (5,461 ) $ (6,325 ) $ (620 ) $ (612 ) (1) The 2019 and 2018 pension actuarial (gain) loss primarily relates to changes in our weighted average discount rate and mortality assumption and, in 2018 , changes to our retirement rate assumptions. (2) The 2019 retiree medical and other postretirement benefits actuarial loss primarily relates to changes in our weighted average discount rate assumption and plan experience adjustments. The 2018 retiree medical and other postretirement benefits actuarial gain primarily relates to changes in our weighted average discount rate, medical trend and per capita claims assumptions. (3) During 2019 , we contributed $1.2 billion to our defined benefit pension plans, including supplemental contributions of $444 million and a $786 million minimum required contribution. During 2018 , we contributed $475 million to our defined benefit pension plans, including supplemental contributions of $433 million and a $42 million minimum required contribution.
Schedule of Changes in Fair Value of Plan Assets	The following tables provide a reconciliation of the changes in the pension and retiree medical and other postretirement benefits obligations, fair value of plan assets and a statement of funded status as of December 31, 2019 and 2018 : Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2019 2018 (In millions) Benefit obligation at beginning of period $ 16,378 $ 18,275 $ 837 $ 1,011 Service cost 2 3 3 5 Interest cost 703 674 33 35 Actuarial (gain) loss (1), (2) 1,965 (1,910 ) 20 (133 ) Settlements (2 ) (4 ) — — Benefit payments (689 ) (662 ) (74 ) (81 ) Other 1 2 5 — Benefit obligation at end of period $ 18,358 $ 16,378 $ 824 $ 837 Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2019 2018 (In millions) Fair value of plan assets at beginning of period $ 10,053 $ 11,395 $ 225 $ 295 Actual return (loss) on plan assets 2,305 (1,151 ) 41 (24 ) Employer contributions (3) 1,230 475 12 35 Settlements (2 ) (4 ) — — Benefit payments (689 ) (662 ) (74 ) (81 ) Fair value of plan assets at end of period $ 12,897 $ 10,053 $ 204 $ 225 Funded status at end of period $ (5,461 ) $ (6,325 ) $ (620 ) $ (612 ) (1) The 2019 and 2018 pension actuarial (gain) loss primarily relates to changes in our weighted average discount rate and mortality assumption and, in 2018 , changes to our retirement rate assumptions. (2) The 2019 retiree medical and other postretirement benefits actuarial loss primarily relates to changes in our weighted average discount rate assumption and plan experience adjustments. The 2018 retiree medical and other postretirement benefits actuarial gain primarily relates to changes in our weighted average discount rate, medical trend and per capita claims assumptions. (3) During 2019 , we contributed $1.2 billion to our defined benefit pension plans, including supplemental contributions of $444 million and a $786 million minimum required contribution. During 2018 , we contributed $475 million to our defined benefit pension plans, including supplemental contributions of $433 million and a $42 million minimum required contribution.
Schedule of Amounts Recognized in Consolidated Balance Sheets	Balance Sheet Position Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2019 2018 (In millions) As of December 31, Current liability $ 5 $ 7 $ 24 $ 23 Noncurrent liability 5,456 6,318 596 589 Total liabilities $ 5,461 $ 6,325 $ 620 $ 612
Schedule of Amounts Recognized in Other Comprehensive Income	Net actuarial loss (gain) $ 5,680 $ 5,356 $ (426 ) $ (452 ) Prior service cost (benefit) 104 131 (120 ) (362 ) Total accumulated other comprehensive loss (income), pre-tax $ 5,784 $ 5,487 $ (546 ) $ (814 )
Schedule of Accumulated Benefit Obligations Exceeding Fair Value of Plan Assets	Plans with Accumulated Benefit Obligations Exceeding Fair Value of Plan Assets Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2019 2018 (In millions) Projected benefit obligation $ 18,327 $ 16,351 $ — $ — Accumulated benefit obligation (ABO) 18,315 16,341 — — Accumulated postretirement benefit obligation — — 824 837 Fair value of plan assets 12,862 10,023 204 225 ABO less fair value of plan assets 5,453 6,318 — —
Components of Net Periodic Benefit Cost (Income)	Net Periodic Benefit Cost (Income) Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2017 2019 2018 2017 (In millions) Defined benefit plans: Service cost $ 2 $ 3 $ 2 $ 3 $ 5 $ 4 Interest cost 703 674 721 33 35 39 Expected return on assets (815 ) (905 ) (790 ) (15 ) (24 ) (21 ) Settlements — — 1 — — — Amortization of: Prior service cost (benefit) 28 28 28 (236 ) (236 ) (237 ) Unrecognized net loss (gain) 150 141 144 (31 ) (21 ) (23 ) Net periodic benefit cost (income) $ 68 $ (59 ) $ 106 $ (246 ) $ (241 ) $ (238 )
Schedule of Assumptions Used to Determine Benefit Obligations and Net Periodic Benefit Cost	The following actuarial assumptions were used to determine our benefit obligations and net periodic benefit cost (income) for the periods presented: Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2019 2018 Benefit obligations: Weighted average discount rate 3.4% 4.4% 3.3% 4.3% Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2017 2019 2018 2017 Net periodic benefit cost (income): Weighted average discount rate 4.4% 3.8% 4.3% 4.3% 3.6% 4.1% Weighted average expected rate of return on plan assets 8.0% 8.0% 8.0% 8.0% 8.0% 8.0% Weighted average health care cost trend rate assumed for next year (1) N/A N/A N/A 3.7% 3.9% 4.2% (1) The weighted average health care cost trend rate at December 31, 2019 is assumed to decline gradually to 3.3% by 2027 and remain level thereafter.
Schedule of One Percentage Point Change in Assumed Health Care Cost Trend Rates	A one percentage point change in the assumed health care cost trend rates would have the following approximate effects on our retiree medical and other postretirement benefits plans (in millions): 1% Increase 1% Decrease Increase (decrease) on 2019 service and interest cost $ 1 $ (1 ) Increase (decrease) on benefit obligation as of December 31, 2019 40 (40 )
Schedule of Expected Future Service Benefit Payments	The following benefit payments, which reflect expected future service as appropriate, are expected to be paid (approximately, in millions): 2020 2021 2022 2023 2024 2025-2029 Pension benefits $ 753 $ 792 $ 832 $ 874 $ 914 $ 5,045 Retiree medical and other postretirement benefits 80 71 66 64 61 265
Schedule of Allocation of Plan Assets	The current strategic target asset allocation is as follows: Asset Class/Sub-Class Allowed Range Equity 45% - 80% Public: U.S. Large 15% - 40% U.S. Small/Mid 2% - 10% International 10% - 25% Emerging Markets 2% - 15% Alternative Investments 5% - 30% Fixed Income 20% - 55% Public: U.S. Long Duration 15% - 45% High Yield and Emerging Markets 0% - 10% Private Income 0% - 10% Other 0% - 5% Cash Equivalents 0% - 20%
Changes in Fair Value Measurements of Level 3 Investments	Changes in fair value measurements of Level 3 investments during the year ended December 31, 2019 , were as follows (in millions): Private Market Partnerships Insurance Group Annuity Contracts Beginning balance at December 31, 2018 $ 7 $ 2 Purchases 3 — Ending balance at December 31, 2019 $ 10 $ 2 Changes in fair value measurements of Level 3 investments during the year ended December 31, 2018 , were as follows (in millions): Private Market Partnerships Insurance Group Annuity Contracts Beginning balance at December 31, 2017 $ 14 $ 2 Actual loss on plan assets: Relating to assets still held at the reporting date (2 ) — Purchases 1 — Sales (6 ) — Ending balance at December 31, 2018 $ 7 $ 2
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Schedule of Allocation of Plan Assets	The fair value of our pension plan assets at December 31, 2019 and 2018 , by asset category, were as follows (in millions): Fair Value Measurements as of December 31, 2019 Asset Category Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Cash and cash equivalents $ 20 $ — $ — $ 20 Equity securities: International markets (a), (b) 2,769 — — 2,769 Large-cap companies (b) 2,312 — — 2,312 Mid-cap companies (b) 543 — — 543 Small-cap companies (b) 97 — — 97 Mutual funds (c) 68 — — 68 Fixed income: Corporate debt (d) — 2,804 — 2,804 Government securities (e) — 923 — 923 U.S. municipal securities — 51 — 51 Mortgage backed securities — 4 — 4 Alternative instruments: Private market partnerships (f) — — 10 10 Private market partnerships measured at net asset value (f), (g) — — — 1,464 Common/collective trusts (h) — 358 — 358 Common/collective trusts and 103-12 Investment Trust measured at net asset value (g), (h) — — — 1,423 Insurance group annuity contracts — — 2 2 Dividend and interest receivable 53 — — 53 Due to/from brokers for sale of securities – net (4 ) — — (4 ) Total $ 5,858 $ 4,140 $ 12 $ 12,897 (a) Holdings are diversified as follows: 14% United Kingdom, 8% Switzerland, 8% Ireland, 7% Japan, 7% France, 6% South Korea, 6% Canada, 18% emerging markets and the remaining 26% with no concentration greater than 5% in any one country. (b) There are no significant concentrations of holdings by company or industry. (c) Investment includes mutual funds invested 40% in equity securities of large-cap, mid-cap and small-cap U.S. companies, 33% in U.S. treasuries and corporate bonds and 27% in equity securities of international companies. (d) Includes approximately 76% investments in corporate debt with a S&P rating lower than A and 24% investments in corporate debt with a S&P rating A or higher. Holdings include 86% U.S. companies, 11% international companies and 3% emerging market companies. (e) Includes approximately 79% investments in U.S. domestic government securities, 13% in emerging market government securities and 8% in international government securities. There are no significant foreign currency risks within this classification. (f) Includes limited partnerships that invest primarily in domestic private equity and private income opportunities. The pension plan’s master trust does not have the right to redeem its limited partnership investment at its net asset value, but rather receives distributions as the underlying assets are liquidated. It is estimated that the underlying assets of these funds will be gradually liquidated over the next one to ten years . Additionally, the pension plan’s master trust has future funding commitments of approximately $1.4 billion over the next ten years . (g) Certain investments that are measured using net asset value per share (or its equivalent) as a practical expedient for fair value have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the notes to the consolidated financial statements. (h) Investment includes 36% in a common/collective trust investing in securities of larger companies within the U.S., 29% in a common/collective trust investing in securities of smaller companies located outside the U.S., 16% in a collective interest trust investing primarily in short-term securities, 15% in an emerging market 103-12 Investment Trust with investments in emerging country equity securities and 4% in Canadian segregated balanced value, income growth and diversified pooled funds. For some trusts, requests for withdrawals must meet specific requirements with advance notice of redemption preferred. Fair Value Measurements as of December 31, 2018 Asset Category Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Cash and cash equivalents $ 23 $ — $ — $ 23 Equity securities: International markets (a), (b) 3,181 — — 3,181 Large-cap companies (b) 2,021 — — 2,021 Mid-cap companies (b) 583 — — 583 Small-cap companies (b) 122 — — 122 Mutual funds (c) 52 — — 52 Fixed income: Corporate debt (d) — 2,116 — 2,116 Government securities (e) — 228 — 228 U.S. municipal securities — 40 — 40 Alternative instruments: Private market partnerships (f) — — 7 7 Private market partnerships measured at net asset value (f), (g) — — — 1,188 Common/collective trusts (h) — 218 — 218 Common/collective trusts and 103-12 Investment Trust measured at net asset value (g), (h) — — — 227 Insurance group annuity contracts — — 2 2 Dividend and interest receivable 47 — — 47 Due to/from brokers for sale of securities – net 5 — — 5 Other liabilities – net (7 ) — — (7 ) Total $ 6,027 $ 2,602 $ 9 $ 10,053 (a) Holdings are diversified as follows: 17% United Kingdom, 10% Japan, 8% France, 7% Switzerland, 6% Ireland, 17% emerging markets and the remaining 35% with no concentration greater than 5% in any one country. (b) There are no significant concentrations of holdings by company or industry. (c) Investment includes mutual funds invested 37% in equity securities of large-cap, mid-cap and small-cap U.S. companies, 38% in U.S. treasuries and corporate bonds and 25% in equity securities of international companies. (d) Includes approximately 77% investments in corporate debt with a S&P rating lower than A and 23% investments in corporate debt with a S&P rating A or higher. Holdings include 85% U.S. companies, 12% international companies and 3% emerging market companies. (e) Includes approximately 32% investments in U.S. domestic government securities, 37% in emerging market government securities and 31% in international government securities. There are no significant foreign currency risks within this classification. (f) Includes limited partnerships that invest primarily in U.S. ( 94% ) and European ( 6% ) buyout opportunities of a range of privately held companies. The pension plan’s master trust does not have the right to redeem its limited partnership investment at its net asset value, but rather receives distributions as the underlying assets are liquidated. It is estimated that the underlying assets of these funds will be gradually liquidated over the next one to ten years . Additionally, the pension plan’s master trust has future funding commitments of approximately $1.0 billion over the next ten years . (g) Certain investments that are measured using net asset value per share (or its equivalent) as a practical expedient for fair value have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the notes to the consolidated financial statements. (h) Investment includes 45% in an emerging market 103-12 Investment Trust with investments in emerging country equity securities, 37% in a collective interest trust investing primarily in short-term securities, 12% in Canadian segregated balanced value, income growth and diversified pooled funds and 6% in a common/collective trust investing in securities of smaller companies located outside the U.S., including developing markets. For some trusts, requests for withdrawals must meet specific requirements with advance notice of redemption preferred.
Retiree Medical And Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Schedule of Allocation of Plan Assets	The fair value of our retiree medical and other postretirement benefits plans assets by asset category, were as follows (in millions): Fair Value Measurements as of December 31, 2019 Asset Category Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Money market fund $ 4 $ — $ — $ 4 Mutual funds – AAL Class — 200 — 200 Total $ 4 $ 200 $ — $ 204 Fair Value Measurements as of December 31, 2018 Asset Category Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Money market fund $ 4 $ — $ — $ 4 Mutual funds – AAL Class — 221 — 221 Total $ 4 $ 221 $ — $ 225
American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Schedule of Changes in Projected Benefit Obligations	The following tables provide a reconciliation of the changes in the pension and retiree medical and other postretirement benefits obligations, fair value of plan assets and a statement of funded status as of December 31, 2019 and 2018 : Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2019 2018 (In millions) Benefit obligation at beginning of period $ 16,282 $ 18,175 $ 837 $ 1,010 Service cost 2 2 3 5 Interest cost 699 670 33 35 Actuarial (gain) loss (1), (2) 1,951 (1,905 ) 20 (132 ) Settlements (2 ) (4 ) — — Benefit payments (686 ) (659 ) (74 ) (81 ) Other — 3 5 — Benefit obligation at end of period $ 18,246 $ 16,282 $ 824 $ 837 Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2019 2018 (In millions) Fair value of plan assets at beginning of period $ 10,001 $ 11,340 $ 225 $ 295 Actual return (loss) on plan assets 2,292 (1,148 ) 41 (24 ) Employer contributions (3) 1,224 472 12 35 Settlements (2 ) (4 ) — — Benefit payments (686 ) (659 ) (74 ) (81 ) Fair value of plan assets at end of period $ 12,829 $ 10,001 $ 204 $ 225 Funded status at end of period $ (5,417 ) $ (6,281 ) $ (620 ) $ (612 ) (1) The 2019 and 2018 pension actuarial (gain) loss primarily relates to changes in American’s weighted average discount rate and mortality assumption and, in 2018 , changes to American’s retirement rate assumptions. (2) The 2019 retiree medical and other postretirement benefits actuarial loss primarily relates to changes in American’s weighted average discount rate assumption and plan experience adjustments. The 2018 retiree medical and other postretirement benefits actuarial gain primarily relates to changes in American’s weighted average discount rate, medical trend and per capita claims assumptions. (3) During 2019 , American contributed $1.2 billion to its defined benefit pension plans, including supplemental contributions of $444 million and a $780 million minimum required contribution. During 2018 , American contributed $472 million to its defined benefit pension plans, including supplemental contributions of $433 million and a $39 million minimum required contribution.
Schedule of Changes in Fair Value of Plan Assets	Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2019 2018 (In millions) Fair value of plan assets at beginning of period $ 10,001 $ 11,340 $ 225 $ 295 Actual return (loss) on plan assets 2,292 (1,148 ) 41 (24 ) Employer contributions (3) 1,224 472 12 35 Settlements (2 ) (4 ) — — Benefit payments (686 ) (659 ) (74 ) (81 ) Fair value of plan assets at end of period $ 12,829 $ 10,001 $ 204 $ 225 Funded status at end of period $ (5,417 ) $ (6,281 ) $ (620 ) $ (612 ) (1) The 2019 and 2018 pension actuarial (gain) loss primarily relates to changes in American’s weighted average discount rate and mortality assumption and, in 2018 , changes to American’s retirement rate assumptions. (2) The 2019 retiree medical and other postretirement benefits actuarial loss primarily relates to changes in American’s weighted average discount rate assumption and plan experience adjustments. The 2018 retiree medical and other postretirement benefits actuarial gain primarily relates to changes in American’s weighted average discount rate, medical trend and per capita claims assumptions. (3) During 2019 , American contributed $1.2 billion to its defined benefit pension plans, including supplemental contributions of $444 million and a $780 million minimum required contribution. During 2018 , American contributed $472 million to its defined benefit pension plans, including supplemental contributions of $433 million and a $39 million minimum required contribution.
Schedule of Amounts Recognized in Consolidated Balance Sheets	Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2019 2018 (In millions) As of December 31, Current liability $ 5 $ 7 $ 24 $ 23 Noncurrent liability 5,412 6,274 596 589 Total liabilities $ 5,417 $ 6,281 $ 620 $ 612
Schedule of Amounts Recognized in Other Comprehensive Income	Net actuarial loss (gain) $ 5,662 $ 5,341 $ (426 ) $ (452 ) Prior service cost (benefit) 102 131 (120 ) (362 ) Total accumulated other comprehensive loss (income), pre-tax $ 5,764 $ 5,472 $ (546 ) $ (814 )
Schedule of Accumulated Benefit Obligations Exceeding Fair Value of Plan Assets	Plans with Accumulated Benefit Obligations Exceeding Fair Value of Plan Assets Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2019 2018 (In millions) Projected benefit obligation $ 18,215 $ 16,254 $ — $ — Accumulated benefit obligation (ABO) 18,204 16,246 — — Accumulated postretirement benefit obligation — — 824 837 Fair value of plan assets 12,794 9,971 204 225 ABO less fair value of plan assets 5,410 6,275 — —
Components of Net Periodic Benefit Cost (Income)	Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2017 2019 2018 2017 (In millions) Defined benefit plans: Service cost $ 2 $ 2 $ 2 $ 3 $ 5 $ 4 Interest cost 699 670 717 33 35 39 Expected return on assets (811 ) (901 ) (786 ) (15 ) (24 ) (21 ) Settlements — — 1 — — — Amortization of: Prior service cost (benefit) 28 28 28 (236 ) (236 ) (237 ) Unrecognized net loss (gain) 150 140 144 (31 ) (21 ) (23 ) Net periodic benefit cost (income) $ 68 $ (61 ) $ 106 $ (246 ) $ (241 ) $ (238 )
Schedule of Assumptions Used to Determine Benefit Obligations and Net Periodic Benefit Cost	The following actuarial assumptions were used to determine American’s benefit obligations and net periodic benefit cost (income) for the periods presented: Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2019 2018 Benefit obligations: Weighted average discount rate 3.4% 4.4% 3.3% 4.3% Pension Benefits Retiree Medical and Other Postretirement Benefits 2019 2018 2017 2019 2018 2017 Net periodic benefit cost (income): Weighted average discount rate 4.4% 3.8% 4.3% 4.3% 3.6% 4.1% Weighted average expected rate of return on plan assets 8.0% 8.0% 8.0% 8.0% 8.0% 8.0% Weighted average health care cost trend rate assumed for next year (1) N/A N/A N/A 3.7% 3.9% 4.2% (1) The weighted average health care cost trend rate at December 31, 2019 is assumed to decline gradually to 3.3% by 2027 and remain level thereafter.
Schedule of One Percentage Point Change in Assumed Health Care Cost Trend Rates	A one percentage point change in the assumed health care cost trend rates would have the following approximate effects on American’s retiree medical and other postretirement benefits plans (in millions): 1% Increase 1% Decrease Increase (decrease) on 2019 service and interest cost $ 1 $ (1 ) Increase (decrease) on benefit obligation as of December 31, 2019 40 (40 )
Schedule of Expected Future Service Benefit Payments	The following benefit payments, which reflect expected future service as appropriate, are expected to be paid (approximately, in millions): 2020 2021 2022 2023 2024 2025-2029 Pension benefits $ 749 $ 788 $ 827 $ 869 $ 910 $ 5,017 Retiree medical and other postretirement benefits 80 71 66 64 61 265
Schedule of Allocation of Plan Assets	The current strategic target asset allocation is as follows: Asset Class/Sub-Class Allowed Range Equity 45% - 80% Public: U.S. Large 15% - 40% U.S. Small/Mid 2% - 10% International 10% - 25% Emerging Markets 2% - 15% Alternative Investments 5% - 30% Fixed Income 20% - 55% Public: U.S. Long Duration 15% - 45% High Yield and Emerging Markets 0% - 10% Private Income 0% - 10% Other 0% - 5% Cash Equivalents 0% - 20%
Changes in Fair Value Measurements of Level 3 Investments	Changes in fair value measurements of Level 3 investments during the year ended December 31, 2019 , were as follows (in millions): Private Market Partnerships Insurance Group Annuity Contracts Beginning balance at December 31, 2018 $ 7 $ 2 Purchases 3 — Ending balance at December 31, 2019 $ 10 $ 2 Changes in fair value measurements of Level 3 investments during the year ended December 31, 2018 , were as follows (in millions): Private Market Partnerships Insurance Group Annuity Contracts Beginning balance at December 31, 2017 $ 14 $ 2 Actual loss on plan assets: Relating to assets still held at the reporting date (2 ) — Purchases 1 — Sales (6 ) — Ending balance at December 31, 2018 $ 7 $ 2
American Airlines, Inc. [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Schedule of Allocation of Plan Assets	The fair value of American’s pension plan assets at December 31, 2019 and 2018 , by asset category, were as follows (in millions): Fair Value Measurements as of December 31, 2019 Asset Category Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Cash and cash equivalents $ 20 $ — $ — $ 20 Equity securities: International markets (a), (b) 2,769 — — 2,769 Large-cap companies (b) 2,312 — — 2,312 Mid-cap companies (b) 543 — — 543 Small-cap companies (b) 97 — — 97 Fixed income: Corporate debt (c) — 2,804 — 2,804 Government securities (d) — 923 — 923 U.S. municipal securities — 51 — 51 Mortgage backed securities — 4 — 4 Alternative instruments: Private market partnerships (e) — — 10 10 Private market partnerships measured at net asset value (e), (f) — — — 1,464 Common/collective trusts (g) — 358 — 358 Common/collective trusts and 103-12 Investment Trust measured at net asset value (f), (g) — — — 1,423 Insurance group annuity contracts — — 2 2 Dividend and interest receivable 53 — — 53 Due to/from brokers for sale of securities – net (4 ) — — (4 ) Total $ 5,790 $ 4,140 $ 12 $ 12,829 (a) Holdings are diversified as follows: 14% United Kingdom, 8% Switzerland, 8% Ireland, 7% Japan, 7% France, 6% South Korea, 6% Canada, 18% emerging markets and the remaining 26% with no concentration greater than 5% in any one country. (b) There are no significant concentrations of holdings by company or industry. (c) Includes approximately 76% investments in corporate debt with a S&P rating lower than A and 24% investments in corporate debt with a S&P rating A or higher. Holdings include 86% U.S. companies, 11% international companies and 3% emerging market companies. (d) Includes approximately 79% investments in U.S. domestic government securities, 13% in emerging market government securities and 8% in international government securities. There are no significant foreign currency risks within this classification. (e) Includes limited partnerships that invest primarily in domestic private equity and private income opportunities. The pension plan’s master trust does not have the right to redeem its limited partnership investment at its net asset value, but rather receives distributions as the underlying assets are liquidated. It is estimated that the underlying assets of these funds will be gradually liquidated over the next one to ten years . Additionally, the pension plan’s master trust has future funding commitments of approximately $1.4 billion over the next ten years . (f) Certain investments that are measured using net asset value per share (or its equivalent) as a practical expedient for fair value have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the notes to the consolidated financial statements. (g) Investment includes 36% in a common/collective trust investing in securities of larger companies within the U.S., 29% in a common/collective trust investing in securities of smaller companies located outside the U.S., 16% in a collective interest trust investing primarily in short-term securities, 15% in an emerging market 103-12 Investment Trust with investments in emerging country equity securities and 4% in Canadian segregated balanced value, income growth and diversified pooled funds. For some trusts, requests for withdrawals must meet specific requirements with advance notice of redemption preferred. Fair Value Measurements as of December 31, 2018 Asset Category Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Cash and cash equivalents $ 23 $ — $ — $ 23 Equity securities: International markets (a), (b) 3,181 — — 3,181 Large-cap companies (b) 2,021 — — 2,021 Mid-cap companies (b) 583 — — 583 Small-cap companies (b) 122 — — 122 Fixed income: Corporate debt (c) — 2,116 — 2,116 Government securities (d) — 228 — 228 U.S. municipal securities — 40 — 40 Alternative instruments: Private market partnerships (e) — — 7 7 Private market partnerships measured at net asset value (e), (f) — — — 1,188 Common/collective trusts (g) — 218 — 218 Common/collective trusts and 103-12 Investment Trust measured at net asset value (f), (g) — — — 227 Insurance group annuity contracts — — 2 2 Dividend and interest receivable 47 — — 47 Due to/from brokers for sale of securities – net 5 — — 5 Other liabilities – net (7 ) — — (7 ) Total $ 5,975 $ 2,602 $ 9 $ 10,001 (a) Holdings are diversified as follows: 17% United Kingdom, 10% Japan, 8% France, 7% Switzerland, 6% Ireland, 17% emerging markets and the remaining 35% with no concentration greater than 5% in any one country. (b) There are no significant concentrations of holdings by company or industry. (c) Includes approximately 77% investments in corporate debt with a S&P rating lower than A and 23% investments in corporate debt with a S&P rating A or higher. Holdings include 85% U.S. companies, 12% international companies and 3% emerging market companies. (d) Includes approximately 32% investments in U.S. domestic government securities, 37% in emerging market government securities and 31% in international government securities. There are no significant foreign currency risks within this classification. (e) Includes limited partnerships that invest primarily in U.S. ( 94% ) and European ( 6% ) buyout opportunities of a range of privately held companies. The pension plan’s master trust does not have the right to redeem its limited partnership investment at its net asset value, but rather receives distributions as the underlying assets are liquidated. It is estimated that the underlying assets of these funds will be gradually liquidated over the next one to ten years . Additionally, the pension plan’s master trust has future funding commitments of approximately $1.0 billion over the next ten years . (f) Certain investments that are measured using net asset value per share (or its equivalent) as a practical expedient for fair value have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the notes to the consolidated financial statements. (g) Investment includes 45% in an emerging market 103-12 Investment Trust with investments in emerging country equity securities, 37% in a collective interest trust investing primarily in short-term securities, 12% in Canadian segregated balanced value, income growth and diversified pooled funds and 6% in a common/collective trust investing in securities of smaller companies located outside the U.S., including developing markets. For some trusts, requests for withdrawals must meet specific requirements with advance notice of redemption preferred.
American Airlines, Inc. [Member] | Retiree Medical And Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Schedule of Allocation of Plan Assets	The fair value of American’s retiree medical and other postretirement benefits plans assets by asset category, were as follows (in millions): Fair Value Measurements as of December 31, 2019 Asset Category Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Money market fund $ 4 $ — $ — $ 4 Mutual funds – AAL Class — 200 — 200 Total $ 4 $ 200 $ — $ 204 Fair Value Measurements as of December 31, 2018 Asset Category Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Money market fund $ 4 $ — $ — $ 4 Mutual funds – AAL Class — 221 — 221 Total $ 4 $ 221 $ — $ 225

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	12 Months Ended
	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Components of Accumulated Other Comprehensive Loss (AOCI)	The components of AOCI are as follows (in millions): Pension, Unrealized Gain (Loss) on Investments Income Tax (1) Total Balance at December 31, 2017 $ (4,523 ) $ (1 ) $ (1,252 ) $ (5,776 ) Other comprehensive income (loss) before reclassifications (62 ) (4 ) 15 (51 ) Amounts reclassified from AOCI (88 ) — 19 (2) (69 ) Net current-period other comprehensive income (loss) (150 ) (4 ) 34 (120 ) Balance at December 31, 2018 (4,673 ) (5 ) (1,218 ) (5,896 ) Other comprehensive income (loss) before reclassifications (476 ) 3 107 (366 ) Amounts reclassified from AOCI (89 ) — 20 (2) (69 ) Net current-period other comprehensive income (loss) (565 ) 3 127 (435 ) Balance at December 31, 2019 $ (5,238 ) $ (2 ) $ (1,091 ) $ (6,331 ) (1) Relates principally to pension, retiree medical and other postretirement benefits obligations that will not be recognized in net income until the obligations are fully extinguished. (2) Relates to pension, retiree medical and other postretirement benefits obligations and is recognized within the income tax provision on our consolidated statements of operations.
Reclassifications out of AOCI	Reclassifications out of AOCI for the years ended December 31, 2019 and 2018 are as follows (in millions): Amounts reclassified from AOCI Affected line items on the Year Ended December 31, AOCI Components 2019 2018 Amortization of pension, retiree medical and other postretirement benefits: Prior service benefit $ (162 ) $ (161 ) Nonoperating other income, net Actuarial loss 93 92 Nonoperating other income, net Total reclassifications for the period, net of tax $ (69 ) $ (69 )
American Airlines, Inc. [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Components of Accumulated Other Comprehensive Loss (AOCI)	The components of AOCI are as follows (in millions): Pension, Unrealized Gain (Loss) on Investments Income Tax (1) Total Balance at December 31, 2017 $ (4,508 ) $ (1 ) $ (1,364 ) $ (5,873 ) Other comprehensive income (loss) before reclassifications (61 ) (4 ) 15 (50 ) Amounts reclassified from AOCI (89 ) — 20 (2) (69 ) Net current-period other comprehensive income (loss) (150 ) (4 ) 35 (119 ) Balance at December 31, 2018 (4,658 ) (5 ) (1,329 ) (5,992 ) Other comprehensive income (loss) before reclassifications (471 ) 3 106 (362 ) Amounts reclassified from AOCI (89 ) — 20 (2) (69 ) Net current-period other comprehensive income (loss) (560 ) 3 126 (431 ) Balance at December 31, 2019 $ (5,218 ) $ (2 ) $ (1,203 ) $ (6,423 ) (1) Relates principally to pension, retiree medical and other postretirement benefits obligations that will not be recognized in net income until the obligations are fully extinguished. (2) Relates to pension, retiree medical and other postretirement benefits obligations and is recognized within the income tax provision on American’s consolidated statements of operations.
Reclassifications out of AOCI	Reclassifications out of AOCI for the years ended December 31, 2019 and 2018 are as follows (in millions): Amounts reclassified from AOCI Affected line items on the Year Ended December 31, AOCI Components 2019 2018 Amortization of pension, retiree medical and other postretirement benefits: Prior service benefit $ (162 ) $ (161 ) Nonoperating other income, net Actuarial loss 93 92 Nonoperating other income, net Total reclassifications for the period, net of tax $ (69 ) $ (69 )

Commitments, Contingencies an_2

Commitments, Contingencies and Guarantees (Tables)	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies [Line Items]
Long-term Purchase Commitments	Under all of our aircraft and engine purchase agreements, our total future commitments as of December 31, 2019 are expected to be as follows (approximately, in millions): 2020 2021 2022 2023 2024 2025 and Thereafter Total Payments for aircraft commitments and certain engines (1) $ 1,629 $ 750 $ 1,599 $ 1,543 $ 2,574 $ 4,855 $ 12,950 (1) These amounts are net of purchase deposits currently held by the manufacturers. We have granted a security interest in certain of our purchase deposits with Boeing. Our purchase deposits held by all manufacturers totaled $1.7 billion as of December 31, 2019 . On March 13, 2019, a directive from the Federal Aviation Administration (FAA) grounded all U.S.-registered Boeing 737 MAX aircraft. We currently have 76 Boeing 737 MAX Family aircraft on order and we have not taken delivery of any Boeing 737 MAX Family aircraft since the grounding. The extent of the delay to the scheduled deliveries of the Boeing 737 MAX aircraft is expected to be impacted by the length of time the FAA order remains in place, Boeing's production rate and the pace at which Boeing can deliver aircraft following the lifting of the FAA order, among other factors. Due to uncertainty surrounding the timing of delivery of certain aircraft, the amounts in the table represent our current best estimate, including with respect to the delivery of Boeing 737 MAX aircraft; however, the actual delivery schedule may differ from the table above, potentially materially. The amounts in the table exclude 22 787-8 aircraft to be delivered in 2020 and 2021 for which Boeing has committed to provide sale-leaseback financing (in the form of operating leases). See Note 6 for information regarding this operating lease commitment.
Minimum Fixed Obligations under Capacity Purchase Agreements with Third-Party Regional Carriers	As of December 31, 2019 , American’s minimum obligations under its capacity purchase agreements with third-party regional carriers are as follows (approximately, in millions): 2020 2021 2022 2023 2024 2025 and Thereafter Total Minimum obligations under capacity purchase agreements with third-party regional carriers (1) $ 1,115 $ 1,185 $ 1,126 $ 1,077 $ 1,077 $ 3,402 $ 8,982 (1) Represents minimum payments under capacity purchase agreements with third-party regional carriers, which are estimates of costs based on assumed minimum levels of flying under the capacity purchase agreements and American’s actual payments could differ materially. Excludes payments for the lease of certain aircraft under capacity purchase agreements, which are reflected in the operating lease obligations in Note 6.
American Airlines, Inc. [Member]
Commitments and Contingencies [Line Items]
Long-term Purchase Commitments	Under all of American’s aircraft and engine purchase agreements, its total future commitments as of December 31, 2019 are expected to be as follows (approximately, in millions): 2020 2021 2022 2023 2024 2025 and Thereafter Total Payments for aircraft commitments and certain engines (1) $ 1,629 $ 750 $ 1,599 $ 1,543 $ 2,574 $ 4,855 $ 12,950 (1) These amounts are net of purchase deposits currently held by the manufacturers. American has granted a security interest in certain of its purchase deposits with Boeing. American’s purchase deposits held by all manufacturers totaled $1.7 billion as of December 31, 2019 . On March 13, 2019, a directive from the Federal Aviation Administration (FAA) grounded all U.S.-registered Boeing 737 MAX aircraft. American currently has 76 Boeing 737 MAX Family aircraft on order and American has not taken delivery of any Boeing 737 MAX Family aircraft since the grounding. The extent of the delay to the scheduled deliveries of the Boeing 737 MAX aircraft is expected to be impacted by the length of time the FAA order remains in place, Boeing's production rate and the pace at which Boeing can deliver aircraft following the lifting of the FAA order, among other factors. Due to uncertainty surrounding the timing of delivery of certain aircraft, the amounts in the table represent American’s current best estimate, including with respect to the delivery of Boeing 737 MAX aircraft; however, the actual delivery schedule may differ from the table above, potentially materially. The amounts in the table exclude 22 787-8 aircraft to be delivered in 2020 and 2021 for which Boeing has committed to provide sale-leaseback financing (in the form of operating leases). See Note 4 for information regarding this operating lease commitment.
Minimum Fixed Obligations under Capacity Purchase Agreements with Third-Party Regional Carriers	As of December 31, 2019 , American’s minimum obligations under its capacity purchase agreements with third-party regional carriers are as follows (approximately, in millions): 2020 2021 2022 2023 2024 2025 and Thereafter Total Minimum obligations under capacity purchase agreements with third-party regional carriers (1) $ 1,115 $ 1,185 $ 1,126 $ 1,077 $ 1,077 $ 3,402 $ 8,982 (1) Represents minimum payments under capacity purchase agreements with third-party regional carriers, which are estimates of costs based on assumed minimum levels of flying under the capacity purchase agreements and American’s actual payments could differ materially. Excludes payments for the lease of certain aircraft under capacity purchase agreements, which are reflected in the operating lease obligations in Note 4.

Supplemental Cash Flow Inform_2

Supplemental Cash Flow Information (Tables)	12 Months Ended
	Dec. 31, 2019
Other Significant Noncash Transactions [Line Items]
Cash Flow Information and Non-Cash Investing and Financing Activities	Supplemental disclosure of cash flow information and non-cash investing and financing activities are as follows (in millions): Year Ended December 31, 2019 2018 2017 Non-cash investing and financing activities: Settlement of bankruptcy obligations $ 7 $ — $ 15 Equity Investment — — 120 Supplemental information: Interest paid, net 1,111 1,091 1,040 Income taxes paid 8 18 20
American Airlines, Inc. [Member]
Other Significant Noncash Transactions [Line Items]
Cash Flow Information and Non-Cash Investing and Financing Activities	Supplemental disclosure of cash flow information and non-cash investing and financing activities are as follows (in millions): Year Ended December 31, 2019 2018 2017 Non-cash investing and financing activities: Settlement of bankruptcy obligations $ 7 $ — $ 15 Equity Investment — — 120 Supplemental information: Interest paid, net 1,025 1,009 942 Income taxes paid 8 16 18

Share-based Compensation (Table

Share-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Stock-Settled RSU Award Activity	RSU award activity for all plans for the years ended December 31, 2019 , 2018 and 2017 is as follows: Number of Shares Weighted Average Grant Date Fair Value (In thousands) Outstanding at December 31, 2016 5,187 $ 41.48 Granted 2,309 48.58 Vested and released (2,708 ) 39.63 Forfeited (464 ) 44.48 Outstanding at December 31, 2017 4,324 $ 46.94 Granted 2,194 47.65 Vested and released (1,999 ) 44.99 Forfeited (199 ) 45.72 Outstanding at December 31, 2018 4,320 $ 44.29 Granted 3,206 34.00 Vested and released (2,002 ) 44.90 Forfeited (337 ) 42.55 Outstanding at December 31, 2019 5,187 $ 37.01
American Airlines, Inc. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Stock-Settled RSU Award Activity	RSU award activity for all plans for the years ended December 31, 2019 , 2018 and 2017 is as follows: Number of Shares Weighted Average Grant Date Fair Value (In thousands) Outstanding at December 31, 2016 5,187 $ 41.48 Granted 2,309 48.58 Vested and released (2,708 ) 39.63 Forfeited (464 ) 44.48 Outstanding at December 31, 2017 4,324 $ 46.94 Granted 2,194 47.65 Vested and released (1,999 ) 44.99 Forfeited (199 ) 45.72 Outstanding at December 31, 2018 4,320 $ 44.29 Granted 3,206 34.00 Vested and released (2,002 ) 44.90 Forfeited (337 ) 42.55 Outstanding at December 31, 2019 5,187 $ 37.01

Valuation and Qualifying Acco_2

Valuation and Qualifying Accounts (Tables)	12 Months Ended
	Dec. 31, 2019
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Components of Valuation and Qualifying Accounts	Valuation and Qualifying Accounts (in millions) Balance at Beginning of Year Additions Charged to Statement of Operations Accounts Deductions Balance at End of Year Allowance for obsolescence of spare parts Year ended December 31, 2019 $ 814 $ 91 $ (121 ) $ 784 Year ended December 31, 2018 769 70 (25 ) 814 Year ended December 31, 2017 765 29 (25 ) 769 Allowance for uncollectible accounts Year ended December 31, 2019 $ 29 $ 19 $ (17 ) $ 31 Year ended December 31, 2018 24 42 (37 ) 29 Year ended December 31, 2017 36 43 (55 ) 24
American Airlines, Inc. [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Components of Valuation and Qualifying Accounts	Valuation and Qualifying Accounts (in millions) Balance at Beginning of Year Additions Charged to Statement of Operations Accounts Deductions Balance at End of Year Allowance for obsolescence of spare parts Year ended December 31, 2019 $ 754 $ 79 $ (104 ) $ 729 Year ended December 31, 2018 717 57 (20 ) 754 Year ended December 31, 2017 720 18 (21 ) 717 Allowance for uncollectible accounts Year ended December 31, 2019 $ 24 $ 17 $ (16 ) $ 25 Year ended December 31, 2018 21 39 (36 ) 24 Year ended December 31, 2017 35 41 (55 ) 21

Quarterly Financial Data (Una_2

Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2019
Selected Quarterly Financial Information [Line Items]
Summarized Financial Data	Unaudited summarized financial data by quarter for 2019 and 2018 (in millions, except share and per share amounts): First Quarter Second Quarter Third Quarter Fourth Quarter 2019 Operating revenues $ 10,584 $ 11,960 $ 11,911 $ 11,313 Operating expenses 10,209 10,807 11,103 10,584 Operating income 375 1,153 808 729 Net income 185 662 425 414 Earnings per share: Basic $ 0.41 $ 1.49 $ 0.96 $ 0.95 Diluted $ 0.41 $ 1.49 $ 0.96 $ 0.95 Shares used for computation (in thousands): Basic 451,951 445,008 441,915 434,578 Diluted 453,429 445,587 442,401 435,659 2018 Operating revenues $ 10,401 $ 11,643 $ 11,559 $ 10,938 Operating expenses 10,005 10,639 10,874 10,367 Operating income 396 1,004 685 571 Net income 159 556 372 325 Earnings per share: Basic $ 0.34 $ 1.20 $ 0.81 $ 0.71 Diluted $ 0.34 $ 1.20 $ 0.81 $ 0.70 Shares used for computation (in thousands): Basic 472,297 463,533 460,526 460,589 Diluted 474,598 464,618 461,507 461,915
American Airlines, Inc. [Member]
Selected Quarterly Financial Information [Line Items]
Summarized Financial Data	Unaudited summarized financial data by quarter for 2019 and 2018 (in millions): First Quarter Second Quarter Third Quarter Fourth Quarter 2019 Operating revenues $ 10,581 $ 11,958 $ 11,910 $ 11,312 Operating expenses 10,236 10,831 11,082 10,565 Operating income 345 1,127 828 747 Net income 230 714 508 520 2018 Operating revenues $ 10,398 $ 11,640 $ 11,556 $ 10,936 Operating expenses 9,986 10,626 10,850 10,344 Operating income 412 1,014 706 592 Net income 209 609 433 407

Transactions with Related Par_2

Transactions with Related Parties (Tables)	12 Months Ended
	Dec. 31, 2019
American Airlines, Inc. [Member]
Related Party Transaction [Line Items]
Summary of Net Receivables (Payables) to Related Parties	The following represents the net receivables (payables) to related parties (in millions): December 31, 2019 2018 AAG (1) $ 14,597 $ 12,808 AAG’s wholly-owned subsidiaries (2) (2,146 ) (2,142 ) Total $ 12,451 $ 10,666 (1) The increase in American’s net related party receivable from AAG is primarily due to American providing the cash funding for AAG’s share repurchase and dividend programs. (2) The net payable to AAG’s wholly-owned subsidiaries consists primarily of amounts due under regional capacity purchase agreements with AAG’s wholly-owned regional airlines operating under the brand name of American Eagle.

Basis of Presentation and Sum_4

Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Detail) $ / shares in Units, $ in Millions	Dec. 22, 2017USD ($)	Dec. 31, 2019USD ($)$ / shares	Sep. 30, 2019USD ($)	Jun. 30, 2019USD ($)	Mar. 31, 2019USD ($)	Dec. 31, 2018USD ($)$ / shares	Sep. 30, 2018USD ($)	Jun. 30, 2018USD ($)	Mar. 31, 2018USD ($)	Dec. 31, 2019USD ($)componentReporting_Unit$ / shares	Dec. 31, 2018USD ($)$ / shares	Dec. 31, 2017USD ($)	Jan. 01, 2018USD ($)
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Common stock, par value (in dollars per share) | $ / shares		$ 0.01				$ 0.01				$ 0.01	$ 0.01
Operating lease liabilities		$ 9,129				$ 9,556				$ 9,129	$ 9,556
Operating lease right-of-use assets		8,737				9,151				$ 8,737	9,151
Reclassification from AOCI to retained earnings, tax effect	$ 622
Consolidated reporting unit | Reporting_Unit										1
Goodwill impairment										$ 0
Goodwill		4,091				4,091				4,091	4,091
Indefinite lived intangible assets		1,800				1,900				1,800	1,900
Impairment of intangible assets, indefinite-lived (excluding goodwill)										0
Operating revenues		$ 11,313	$ 11,911	$ 11,960	$ 10,584	$ 10,938	$ 11,559	$ 11,643	$ 10,401	$ 45,768	44,541	$ 42,622
Contract receivables settlement duration										7 days
Advertising expense										$ 129	128	135
Foreign currency gains (losses)										$ (32)	(55)	(4)
Loyalty program [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Contract term										one to seven
Payment term										30 days
Number of revenue components | component										2
Recognition of revenue										$ 3,362
Loyalty revenue - marketing services [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Operating revenues										$ 2,361	$ 2,352	2,124
Air traffic [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Contract term										one year
Recognition of revenue										$ 3,300
American Airlines, Inc. [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Common stock, par value (in dollars per share) | $ / shares		$ 1				$ 1				$ 1	$ 1
Operating lease liabilities		$ 9,083				$ 9,496				$ 9,083	$ 9,496
Operating lease right-of-use assets		8,694				9,094				$ 8,694	9,094
Reclassification from AOCI to retained earnings, tax effect	$ 622
Consolidated reporting unit | Reporting_Unit										1
Goodwill impairment										$ 0
Goodwill		4,091				4,091				4,091	4,091
Indefinite lived intangible assets		1,800				1,900				1,800	1,900
Impairment of intangible assets, indefinite-lived (excluding goodwill)										0
Operating revenues		$ 11,312	$ 11,910	$ 11,958	$ 10,581	$ 10,936	$ 11,556	$ 11,640	$ 10,398	$ 45,761	44,530	42,610
Contract receivables settlement duration										7 days
Advertising expense										$ 129	128	135
Foreign currency gains (losses)										$ (32)	(54)	(4)
American Airlines, Inc. [Member] | Loyalty program [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Contract term										one to seven
Payment term										30 days
Number of revenue components | component										2
Recognition of revenue										$ 3,362
American Airlines, Inc. [Member] | Loyalty revenue - marketing services [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Operating revenues										$ 2,361	$ 2,352	2,124
American Airlines, Inc. [Member] | Air traffic [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Contract term										one year
Recognition of revenue										$ 3,300
Accounting Standards Update 2016-02 [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Operating lease liabilities													$ 10,000
Operating lease right-of-use assets													10,000
Impact of adoption of ASUs													197
Accounting Standards Update 2016-02 [Member] | American Airlines, Inc. [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Operating lease liabilities													10,000
Operating lease right-of-use assets													10,000
Impact of adoption of ASUs													197
Retained Earnings [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Reclassification from AOCI to retained earnings, tax effect												622
Retained Earnings [Member] | American Airlines, Inc. [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Reclassification from AOCI to retained earnings, tax effect												$ 622
Retained Earnings [Member] | Accounting Standards Update 2016-02 [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Impact of adoption of ASUs													197
Retained Earnings [Member] | Accounting Standards Update 2016-02 [Member] | American Airlines, Inc. [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Impact of adoption of ASUs													$ 197

Basis of Presentation and Sum_5

Basis of Presentation and Summary of Significant Accounting Policies - Operating Property and Equipment (Detail) - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Depreciation	$ 2.6	$ 2.4	$ 2.2
Minimum [Member] | Aircraft, engines and related rotable parts [Member]
Property, Plant and Equipment [Line Items]
Residual value percentage of equipment and properties	5.00%
Estimated useful life	20 years
Minimum [Member] | Buildings and improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Minimum [Member] | Furniture, fixtures and other equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Minimum [Member] | Capitalized software [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Maximum [Member] | Aircraft, engines and related rotable parts [Member]
Property, Plant and Equipment [Line Items]
Residual value percentage of equipment and properties	10.00%
Estimated useful life	30 years
Maximum [Member] | Buildings and improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	30 years
Maximum [Member] | Furniture, fixtures and other equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years
Maximum [Member] | Capitalized software [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years
American Airlines, Inc. [Member]
Property, Plant and Equipment [Line Items]
Depreciation	$ 2.5	$ 2.4	$ 2.1
American Airlines, Inc. [Member] | Minimum [Member] | Aircraft, engines and related rotable parts [Member]
Property, Plant and Equipment [Line Items]
Residual value percentage of equipment and properties	5.00%
Estimated useful life	20 years
American Airlines, Inc. [Member] | Minimum [Member] | Buildings and improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
American Airlines, Inc. [Member] | Minimum [Member] | Furniture, fixtures and other equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
American Airlines, Inc. [Member] | Minimum [Member] | Capitalized software [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
American Airlines, Inc. [Member] | Maximum [Member] | Aircraft, engines and related rotable parts [Member]
Property, Plant and Equipment [Line Items]
Residual value percentage of equipment and properties	10.00%
Estimated useful life	30 years
American Airlines, Inc. [Member] | Maximum [Member] | Buildings and improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	30 years
American Airlines, Inc. [Member] | Maximum [Member] | Furniture, fixtures and other equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years
American Airlines, Inc. [Member] | Maximum [Member] | Capitalized software [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years

Basis of Presentation and Sum_6

Basis of Presentation and Summary of Significant Accounting Policies - Definite-Lived Intangible Assets (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	$ (704)	$ (663)
Total	238	279
American Airlines, Inc. [Member]
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	(704)	(663)
Total	238	279
Domestic airport slots [Member]
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross	$ 365	365
Useful life of intangible assets	25 years
Domestic airport slots [Member] | American Airlines, Inc. [Member]
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross	$ 365	365
Useful life of intangible assets	25 years
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross	$ 300	300
Useful life of intangible assets	9 years
Customer relationships [Member] | American Airlines, Inc. [Member]
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross	$ 300	300
Useful life of intangible assets	9 years
Marketing agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross	$ 105	105
Useful life of intangible assets	30 years
Marketing agreements [Member] | American Airlines, Inc. [Member]
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross	$ 105	105
Useful life of intangible assets	30 years
Tradenames [Member]
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross	$ 35	35
Tradenames [Member] | American Airlines, Inc. [Member]
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross	35	35
Airport gate leasehold rights [Member]
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross	$ 137	137
Useful life of intangible assets	25 years
Airport gate leasehold rights [Member] | American Airlines, Inc. [Member]
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross	$ 137	$ 137
Useful life of intangible assets	25 years

Basis of Presentation and Sum_7

Basis of Presentation and Summary of Significant Accounting Policies - Definite-Lived Intangible Assets Amortization Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 41	$ 41	$ 44
2020	41
2021	41
2022	41
2023	7
2024	7
2025 and thereafter	101
Total	238	279
American Airlines, Inc. [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense	41	41	$ 44
2020	41
2021	41
2022	41
2023	7
2024	7
2025 and thereafter	101
Total	$ 238	$ 279

Basis of Presentation and Sum_8

Basis of Presentation and Summary of Significant Accounting Policies - Significant Categories of Reported Operating Revenues (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue from External Customer [Line Items]
Total operating revenues	$ 11,313	$ 11,911	$ 11,960	$ 10,584	$ 10,938	$ 11,559	$ 11,643	$ 10,401	$ 45,768	$ 44,541	$ 42,622
Passenger [Member]
Revenue from External Customer [Line Items]
Total operating revenues									42,010	40,676	39,131
Passenger travel [Member]
Revenue from External Customer [Line Items]
Total operating revenues									38,831	37,457	36,152
Loyalty revenue - travel [Member]
Revenue from External Customer [Line Items]
Total operating revenues									3,179	3,219	2,979
Cargo [Member]
Revenue from External Customer [Line Items]
Total operating revenues									863	1,013	890
Other [Member]
Revenue from External Customer [Line Items]
Total operating revenues									2,895	2,852	2,601
Loyalty revenue - marketing services [Member]
Revenue from External Customer [Line Items]
Total operating revenues									2,361	2,352	2,124
Other revenue [Member]
Revenue from External Customer [Line Items]
Total operating revenues									534	500	477
American Airlines, Inc. [Member]
Revenue from External Customer [Line Items]
Total operating revenues	$ 11,312	$ 11,910	$ 11,958	$ 10,581	$ 10,936	$ 11,556	$ 11,640	$ 10,398	45,761	44,530	42,610
American Airlines, Inc. [Member] | Passenger [Member]
Revenue from External Customer [Line Items]
Total operating revenues									42,010	40,676	39,131
American Airlines, Inc. [Member] | Passenger travel [Member]
Revenue from External Customer [Line Items]
Total operating revenues									38,831	37,457	36,152
American Airlines, Inc. [Member] | Loyalty revenue - travel [Member]
Revenue from External Customer [Line Items]
Total operating revenues									3,179	3,219	2,979
American Airlines, Inc. [Member] | Cargo [Member]
Revenue from External Customer [Line Items]
Total operating revenues									863	1,013	890
American Airlines, Inc. [Member] | Other [Member]
Revenue from External Customer [Line Items]
Total operating revenues									2,888	2,841	2,589
American Airlines, Inc. [Member] | Loyalty revenue - marketing services [Member]
Revenue from External Customer [Line Items]
Total operating revenues									2,361	2,352	2,124
American Airlines, Inc. [Member] | Other revenue [Member]
Revenue from External Customer [Line Items]
Total operating revenues									$ 527	$ 489	$ 465

Basis of Presentation and Sum_9

Basis of Presentation and Summary of Significant Accounting Policies - Passenger Revenue by Geographic Region (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Airline Destination Disclosure [Line Items]
Operating revenues	$ 11,313	$ 11,911	$ 11,960	$ 10,584	$ 10,938	$ 11,559	$ 11,643	$ 10,401	$ 45,768	$ 44,541	$ 42,622
Passenger [Member]
Airline Destination Disclosure [Line Items]
Operating revenues									42,010	40,676	39,131
Passenger [Member] | Domestic [Member]
Airline Destination Disclosure [Line Items]
Operating revenues									30,881	29,573	28,749
Passenger [Member] | Latin America [Member]
Airline Destination Disclosure [Line Items]
Operating revenues									5,047	5,125	4,840
Passenger [Member] | Atlantic [Member]
Airline Destination Disclosure [Line Items]
Operating revenues									4,624	4,376	4,028
Passenger [Member] | Pacific [Member]
Airline Destination Disclosure [Line Items]
Operating revenues									1,458	1,602	1,514
American Airlines, Inc. [Member]
Airline Destination Disclosure [Line Items]
Operating revenues	$ 11,312	$ 11,910	$ 11,958	$ 10,581	$ 10,936	$ 11,556	$ 11,640	$ 10,398	45,761	44,530	42,610
American Airlines, Inc. [Member] | Passenger [Member]
Airline Destination Disclosure [Line Items]
Operating revenues									42,010	40,676	39,131
American Airlines, Inc. [Member] | Passenger [Member] | Domestic [Member]
Airline Destination Disclosure [Line Items]
Operating revenues									30,881	29,573	28,749
American Airlines, Inc. [Member] | Passenger [Member] | Latin America [Member]
Airline Destination Disclosure [Line Items]
Operating revenues									5,047	5,125	4,840
American Airlines, Inc. [Member] | Passenger [Member] | Atlantic [Member]
Airline Destination Disclosure [Line Items]
Operating revenues									4,624	4,376	4,028
American Airlines, Inc. [Member] | Passenger [Member] | Pacific [Member]
Airline Destination Disclosure [Line Items]
Operating revenues									$ 1,458	$ 1,602	$ 1,514

Basis of Presentation and Su_10

Basis of Presentation and Summary of Significant Accounting Policies - Significant Contract Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Contract balances, liability	$ 13,423	$ 12,878
Loyalty program [Member]
Disaggregation of Revenue [Line Items]
Contract balances, liability	8,615	8,539
Air traffic [Member]
Disaggregation of Revenue [Line Items]
Contract balances, liability	4,808	4,339
American Airlines, Inc. [Member]
Disaggregation of Revenue [Line Items]
Contract balances, liability	13,423	12,878
American Airlines, Inc. [Member] | Loyalty program [Member]
Disaggregation of Revenue [Line Items]
Contract balances, liability	8,615	8,539
American Airlines, Inc. [Member] | Air traffic [Member]
Disaggregation of Revenue [Line Items]
Contract balances, liability	$ 4,808	$ 4,339

Basis of Presentation and Su_11

Basis of Presentation and Summary of Significant Accounting Policies - Changes in Loyalty Program Liability (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Movement In Contract With Customer, Liability [Roll Forward]
Beginning balance	$ 12,878
Ending balance	13,423
Loyalty program [Member]
Movement In Contract With Customer, Liability [Roll Forward]
Beginning balance	8,539
Deferral of revenue	3,438
Recognition of revenue	(3,362)
Ending balance	$ 8,615
Inactive period before expiration of mileage credits	18 months
Customer liabilities	$ 3,193	$ 3,267
American Airlines, Inc. [Member]
Movement In Contract With Customer, Liability [Roll Forward]
Beginning balance	12,878
Ending balance	13,423
American Airlines, Inc. [Member] | Loyalty program [Member]
Movement In Contract With Customer, Liability [Roll Forward]
Beginning balance	8,539
Deferral of revenue	3,438
Recognition of revenue	(3,362)
Ending balance	$ 8,615
Inactive period before expiration of mileage credits	18 months
Customer liabilities	$ 3,193	$ 3,267

Basis of Presentation and Su_12

Basis of Presentation and Summary of Significant Accounting Policies - Regional Expenses (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Regional Expenses [Line Items]
Aircraft fuel and related taxes	$ 7,526	$ 8,053	$ 6,128
Salaries, wages and benefits	12,609	12,251	11,954
Maintenance, materials and repairs	2,380	2,050	1,959
Other rent and landing fees	2,055	1,900	1,806
Aircraft rent	1,326	1,264	1,197
Selling expenses	1,602	1,520	1,477
Depreciation and amortization	1,982	1,839	1,702
Other	5,087	5,088	4,910
Total regional expenses	$ 7,501	7,133	6,546
Republic Holdings [Member]
Regional Expenses [Line Items]
Ownership interest	25.00%
Regional Carrier [Member]
Regional Expenses [Line Items]
Aircraft fuel and related taxes	$ 1,869	1,843	1,382
Salaries, wages and benefits	1,781	1,591	1,452
Capacity purchases from third-party regional carriers	1,398	1,431	1,581
Maintenance, materials and repairs	403	340	281
Other rent and landing fees	651	610	625
Aircraft rent	29	32	35
Selling expenses	402	369	361
Depreciation and amortization	336	318	315
Special items, net	6	6	22
Other	626	593	492
Total regional expenses	7,501	7,133	6,546
Regional Carrier [Member] | Republic [Member]
Regional Expenses [Line Items]
Capacity purchases from third-party regional carriers	590	565	544
American Airlines, Inc. [Member]
Regional Expenses [Line Items]
Aircraft fuel and related taxes	7,526	8,053	6,128
Salaries, wages and benefits	12,600	12,240	11,942
Maintenance, materials and repairs	2,380	2,050	1,959
Other rent and landing fees	2,055	1,900	1,806
Aircraft rent	1,326	1,264	1,197
Selling expenses	1,602	1,520	1,477
Depreciation and amortization	1,982	1,839	1,702
Other	5,090	5,090	4,910
Total regional expenses	$ 7,518	7,064	6,572
American Airlines, Inc. [Member] | Republic Holdings [Member]
Regional Expenses [Line Items]
Ownership interest	25.00%
American Airlines, Inc. [Member] | Regional Carrier [Member]
Regional Expenses [Line Items]
Aircraft fuel and related taxes	$ 1,869	1,843	1,382
Salaries, wages and benefits	325	338	356
Capacity purchases from third-party regional carriers	3,562	3,267	3,283
Maintenance, materials and repairs	30	8	7
Other rent and landing fees	621	583	602
Aircraft rent	29	27	27
Selling expenses	402	369	361
Depreciation and amortization	286	267	262
Special items, net	0	0	3
Other	394	362	289
Total regional expenses	7,518	7,064	6,572
American Airlines, Inc. [Member] | Regional Carrier [Member] | Republic [Member]
Regional Expenses [Line Items]
Capacity purchases from third-party regional carriers	$ 590	$ 565	$ 544

Special Items, Net (Details)

Special Items, Net (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Fleet restructuring expenses	$ 39,000	$ 94,000	$ 271,000	$ 422,000	$ 232,000
Fleet impairment			213,000	0	0
Merger integration expenses	85,000	81,000	191,000	268,000	273,000
Litigation reserve adjustments			(53,000)	45,000	0
Mark-to-market adjustments on bankruptcy obligations, net		(37,000)	(11,000)	(76,000)	27,000
Severance expenses		37,000	11,000	58,000	0
Intangible asset impairment			0	26,000	0
Labor contract expenses			0	13,000	46,000
Employee 2017 Tax Act bonus expense			0	0	123,000
Other operating charges, net			13,000	31,000	11,000
Mainline operating special items, net			635,000	787,000	712,000
Regional operating special items, net			6,000	6,000	22,000
Operating special items, net			641,000	793,000	734,000
Debt refinancing and extinguishment charges			16,000	13,000	22,000
Mark-to-market adjustments on equity and other investments, net	(42,000)	22,000	(5,000)	104,000	0
Other nonoperating income, net			(8,000)	(4,000)	0
Nonoperating special items, net			3,000	113,000	22,000
Income tax special items			0	18,000	0
Impact of the 2017 Tax Act			0	0	823,000
Income tax special items, net			0	18,000	823,000
Tax reform bonus, amount per employee					1
American Airlines, Inc. [Member]
Restructuring Cost and Reserve [Line Items]
Fleet restructuring expenses	39,000	94,000	271,000	422,000	232,000
Fleet impairment			213,000	0	0
Merger integration expenses	85,000	81,000	191,000	268,000	273,000
Litigation reserve adjustments			(53,000)	45,000	0
Mark-to-market adjustments on bankruptcy obligations, net		37,000	(11,000)	(76,000)	27,000
Severance expenses		37,000	11,000	58,000	0
Intangible asset impairment			0	26,000	0
Labor contract expenses			0	13,000	46,000
Employee 2017 Tax Act bonus expense			0	0	123,000
Other operating charges, net			13,000	31,000	11,000
Mainline operating special items, net			635,000	787,000	712,000
Regional operating special items, net			0	0	3,000
Operating special items, net			635,000	787,000	715,000
Debt refinancing and extinguishment charges			16,000	13,000	22,000
Mark-to-market adjustments on equity and other investments, net	$ (42,000)	$ 22,000	(5,000)	104,000	0
Other nonoperating income, net			0	(4,000)	0
Nonoperating special items, net			11,000	113,000	22,000
Income tax special items			0	18,000	0
Impact of the 2017 Tax Act			0	0	924,000
Income tax special items, net			$ 0	$ 18,000	924,000
Mainline [Member] | American Airlines, Inc. [Member]
Restructuring Cost and Reserve [Line Items]
Tax reform bonus, amount per employee					$ 1

Earnings Per Common Share (Deta

Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Basic EPS:
Net income	$ 414	$ 425	$ 662	$ 185	$ 325	$ 372	$ 556	$ 159	$ 1,686	$ 1,412	$ 1,282
Weighted average common shares outstanding (in shares)	434,578	441,915	445,008	451,951	460,589	460,526	463,533	472,297	443,363	464,236	489,164
Basic EPS (in dollars per share)	$ 0.95	$ 0.96	$ 1.49	$ 0.41	$ 0.71	$ 0.81	$ 1.20	$ 0.34	$ 3.80	$ 3.04	$ 2.62
Diluted EPS:
Net income for purposes of computing diluted EPS									$ 1,686	$ 1,412	$ 1,282
Share computation for diluted EPS:
Basic weighted average common shares outstanding (in shares)	434,578	441,915	445,008	451,951	460,589	460,526	463,533	472,297	443,363	464,236	489,164
Dilutive effect of stock awards (in shares)									906	1,424	2,528
Diluted weighted average common shares outstanding (in shares)	435,659	442,401	445,587	453,429	461,915	461,507	464,618	474,598	444,269	465,660	491,692
Diluted EPS (in dollars per share)	$ 0.95	$ 0.96	$ 1.49	$ 0.41	$ 0.70	$ 0.81	$ 1.20	$ 0.34	$ 3.79	$ 3.03	$ 2.61
Restricted stock unit awards excluded from the calculation of diluted EPS because inclusion would be antidilutive (in shares)									2,520	1,266	328

Share Repurchase Programs and_2

Share Repurchase Programs and Dividends - Share Repurchase Programs (Details)	12 Months Ended			54 Months Ended	65 Months Ended
	Dec. 31, 2019USD ($)$ / sharesshares	Dec. 31, 2018USD ($)$ / sharesshares	Dec. 31, 2017USD ($)$ / sharesshares	Dec. 31, 2018program	Dec. 31, 2019USD ($)$ / sharesshares	Apr. 30, 2018USD ($)
Equity, Class of Treasury Stock [Line Items]
Stock repurchase programs, authorized amount	$ 13,000,000,000				$ 13,000,000,000
Number of share repurchase programs authorized | program				7
Stock repurchased (in shares) | shares	34,090,566	16,606,157	33,953,127
Aggregate stock repurchase price	$ 1,096,000,000	$ 799,000,000	$ 1,563,000,000
Share Repurchase Program April 2018 [Member]
Equity, Class of Treasury Stock [Line Items]
Stock repurchase programs, authorized amount						$ 2,000,000,000
Stock repurchase programs, remaining authorized amount	$ 565,000,000				$ 565,000,000
Stock repurchased (in shares) | shares	33,800,000	16,600,000	33,900,000		312,700,000
Aggregate stock repurchase price	$ 1,100,000,000	$ 800,000,000	$ 1,600,000,000		$ 12,400,000,000
Average cost per share (in dollars per share) | $ / shares	$ 32.09	$ 48.15	$ 45.68		$ 39.76

Share Repurchase Programs and_3

Share Repurchase Programs and Dividends - Dividends (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended												12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Equity [Abstract]
Dividends declared on common stock (in dollars per share)	$ 0.10	$ 0.1	$ 0.1	$ 0.1	$ 0.1	$ 0.1	$ 0.1	$ 0.1	$ 0.1	$ 0.1	$ 0.1	$ 0.1	$ 0.40	$ 0.40	$ 0.40
Cash paid													$ 178	$ 186	$ 198

Debt - Components of Long-Term

Debt - Components of Long-Term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2019	May 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total long-term debt	$ 23,856		$ 24,001
Less: Total unamortized debt discount, premium and issuance costs	211		222
Less: Current maturities	2,749		3,213
Long-term debt, net of current maturities	20,896		20,566
Secured Debt [Member]
Debt Instrument [Line Items]
Total long-term debt	22,606		22,751
Secured Debt [Member] | 2013 Credit Facilities [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 1,807		1,825
Variable interest rate	3.54%
Secured Debt [Member] | 2014 Credit Facilities [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 1,202		1,215
Variable interest rate	3.72%
Secured Debt [Member] | April 2016 Credit Facilities [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 970		980
Variable interest rate	3.80%
Secured Debt [Member] | December 2016 Credit Facilities [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 1,213		1,225
Variable interest rate	3.74%
Secured Debt [Member] | Enhanced Equipment Trust Certificates (EETC) [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 11,933		11,648
Average interest rate	4.05%
Secured Debt [Member] | Enhanced Equipment Trust Certificates (EETC) [Member] | Minimum [Member]
Debt Instrument [Line Items]
Fixed interest rate per annum	3.00%
Secured Debt [Member] | Enhanced Equipment Trust Certificates (EETC) [Member] | Maximum [Member]
Debt Instrument [Line Items]
Fixed interest rate per annum	8.39%
Secured Debt [Member] | Equipment Loans and Other Notes Payable [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 4,727		5,060
Average interest rate	3.45%
Secured Debt [Member] | Equipment Loans and Other Notes Payable [Member] | Minimum [Member]
Debt Instrument [Line Items]
Fixed interest rate per annum	2.99%
Secured Debt [Member] | Equipment Loans and Other Notes Payable [Member] | Maximum [Member]
Debt Instrument [Line Items]
Fixed interest rate per annum	7.31%
Secured Debt [Member] | Special Facility Revenue Bonds [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 754		798
Secured Debt [Member] | Special Facility Revenue Bonds [Member] | Minimum [Member]
Debt Instrument [Line Items]
Fixed interest rate per annum	5.00%
Secured Debt [Member] | Special Facility Revenue Bonds [Member] | Maximum [Member]
Debt Instrument [Line Items]
Fixed interest rate per annum	8.00%
Unsecured Debt [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 1,250		1,250
Unsecured Debt [Member] | Senior Notes 4.625% Due in 2020 [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 500		500
Fixed interest rate per annum	4.625%
Unsecured Debt [Member] | Senior Notes 5.000% Due 2022 [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 750		0
Fixed interest rate per annum	5.00%	5.00%
Unsecured Debt [Member] | 5.50% Senior Notes [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 0		750
Fixed interest rate per annum	5.50%
American Airlines, Inc. [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 22,577
Less: Total unamortized debt discount, premium and issuance costs	205		219
Less: Current maturities	2,246		2,466
Long-term debt, net of current maturities	20,126		20,037
American Airlines, Inc. [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Total long-term debt	22,577		22,722
American Airlines, Inc. [Member] | Secured Debt [Member] | 2013 Credit Facilities [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 1,807		1,825
Variable interest rate	3.54%
American Airlines, Inc. [Member] | Secured Debt [Member] | 2014 Credit Facilities [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 1,202		1,215
Variable interest rate	3.72%
American Airlines, Inc. [Member] | Secured Debt [Member] | April 2016 Credit Facilities [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 970		980
Variable interest rate	3.80%
American Airlines, Inc. [Member] | Secured Debt [Member] | December 2016 Credit Facilities [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 1,213		1,225
Variable interest rate	3.74%
American Airlines, Inc. [Member] | Secured Debt [Member] | Enhanced Equipment Trust Certificates (EETC) [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 11,933		11,648
Average interest rate	4.05%
American Airlines, Inc. [Member] | Secured Debt [Member] | Enhanced Equipment Trust Certificates (EETC) [Member] | Minimum [Member]
Debt Instrument [Line Items]
Fixed interest rate per annum	3.00%
American Airlines, Inc. [Member] | Secured Debt [Member] | Enhanced Equipment Trust Certificates (EETC) [Member] | Maximum [Member]
Debt Instrument [Line Items]
Fixed interest rate per annum	8.39%
American Airlines, Inc. [Member] | Secured Debt [Member] | Equipment Loans and Other Notes Payable [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 4,727		5,060
Average interest rate	3.45%
American Airlines, Inc. [Member] | Secured Debt [Member] | Equipment Loans and Other Notes Payable [Member] | Minimum [Member]
Debt Instrument [Line Items]
Fixed interest rate per annum	2.99%
American Airlines, Inc. [Member] | Secured Debt [Member] | Equipment Loans and Other Notes Payable [Member] | Maximum [Member]
Debt Instrument [Line Items]
Fixed interest rate per annum	7.31%
American Airlines, Inc. [Member] | Secured Debt [Member] | Special Facility Revenue Bonds [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 725		$ 769
Fixed interest rate per annum	5.00%

Debt - Summary of Availability

Debt - Summary of Availability under Revolving Credit Facilities (Details) - Revolving Credit Facility [Member] - USD ($) $ in Millions	Dec. 31, 2019	Nov. 30, 2019	Oct. 31, 2019
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 3,243
2013 Credit Facilities [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	750
2014 Credit Facilities [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	1,643
April 2016 Credit Facilities [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	450
Other Short-term Revolving Facility [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	400
Secured Debt [Member] | 2013 Credit Facilities [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	750	$ 750	$ 1,000
Secured Debt [Member] | 2014 Credit Facilities [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	1,643	1,600	1,500
Secured Debt [Member] | April 2016 Credit Facilities [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	450	450	300
American Airlines, Inc. [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	3,243
American Airlines, Inc. [Member] | 2013 Credit Facilities [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	750
American Airlines, Inc. [Member] | 2014 Credit Facilities [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	1,643
American Airlines, Inc. [Member] | April 2016 Credit Facilities [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	450
American Airlines, Inc. [Member] | Other Short-term Revolving Facility [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 400
American Airlines, Inc. [Member] | Secured Debt [Member] | 2013 Credit Facilities [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity		750	1,000
American Airlines, Inc. [Member] | Secured Debt [Member] | 2014 Credit Facilities [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity		1,600	1,500
American Airlines, Inc. [Member] | Secured Debt [Member] | April 2016 Credit Facilities [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity		$ 450	$ 300

Debt - Schedule of Maturities o

Debt - Schedule of Maturities of Long-Term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Maturities of Long-term Debt [Abstract]
2020	$ 2,798
2021	3,510
2022	2,303
2023	4,074
2024	1,523
2025 and thereafter	9,648
Total	23,856	$ 24,001
American Airlines, Inc. [Member]
Maturities of Long-term Debt [Abstract]
2020	2,293
2021	3,508
2022	1,551
2023	4,072
2024	1,521
2025 and thereafter	9,632
Total	$ 22,577

Debt - 2013, 2014 and 2016 Cred

Debt - 2013, 2014 and 2016 Credit Facilities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Nov. 30, 2019	Oct. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Principal outstanding or drawn	$ 20,896,000,000			$ 20,566,000,000
Secured Debt [Member]
Debt Instrument [Line Items]
Minimum aggregate liquidity required under debt covenant	$ 2,000,000,000
2013 Credit Facilities [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Line of credit facility undrawn fee percentage	0.63%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 3,243,000,000
Revolving Credit Facility [Member] | 2013 Credit Facilities [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	750,000,000
Revolving Credit Facility [Member] | 2013 Credit Facilities [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	750,000,000	$ 750,000,000	$ 1,000,000,000
Principal outstanding or drawn	$ 0
Revolving Credit Facility [Member] | 2013 Credit Facilities [Member] | Secured Debt [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
Revolving Credit Facility [Member] | 2014 Credit Facilities [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 1,643,000,000
Revolving Credit Facility [Member] | 2014 Credit Facilities [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	1,643,000,000	1,600,000,000	1,500,000,000
Principal outstanding or drawn	$ 0
Revolving Credit Facility [Member] | 2014 Credit Facilities [Member] | Secured Debt [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
Revolving Credit Facility [Member] | April 2016 Credit Facilities [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 450,000,000
Revolving Credit Facility [Member] | April 2016 Credit Facilities [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	450,000,000	450,000,000	300,000,000
Principal outstanding or drawn	$ 0
Revolving Credit Facility [Member] | April 2016 Credit Facilities [Member] | Secured Debt [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
Revolving Credit Facility [Member] | Other Short-term Revolving Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 400,000,000
Term Loan Facility [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Annual installment repayment, percent or original principal balance	1.00%
Term Loan Facility [Member] | 2013 Credit Facilities [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Aggregate principal issued	$ 1,919,000,000
Principal outstanding or drawn	$ 1,807,000,000
Term Loan Facility [Member] | 2013 Credit Facilities [Member] | Secured Debt [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.75%
Term Loan Facility [Member] | 2014 Credit Facilities [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Aggregate principal issued	$ 1,250,000,000
Principal outstanding or drawn	$ 1,202,000,000
Term Loan Facility [Member] | 2014 Credit Facilities [Member] | Secured Debt [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
Term Loan Facility [Member] | April 2016 Credit Facilities [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Aggregate principal issued	$ 1,000,000,000
Principal outstanding or drawn	$ 970,000,000
Term Loan Facility [Member] | April 2016 Credit Facilities [Member] | Secured Debt [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
Term Loan Facility [Member] | December 2016 Credit Facilities [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Aggregate principal issued	$ 1,250,000,000
Principal outstanding or drawn	$ 1,213,000,000
Term Loan Facility [Member] | December 2016 Credit Facilities [Member] | Secured Debt [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
Letter of Credit [Member] | 2013 Credit Facilities [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 100,000,000
Letter of Credit [Member] | 2014 Credit Facilities [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	200,000,000
American Airlines, Inc. [Member]
Debt Instrument [Line Items]
Principal outstanding or drawn	20,126,000,000			$ 20,037,000,000
American Airlines, Inc. [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Minimum aggregate liquidity required under debt covenant	2,000,000,000
American Airlines, Inc. [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 3,243,000,000
Line of credit facility undrawn fee percentage	0.63%
American Airlines, Inc. [Member] | Revolving Credit Facility [Member] | 2013 Credit Facilities [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 750,000,000
American Airlines, Inc. [Member] | Revolving Credit Facility [Member] | 2013 Credit Facilities [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		750,000,000	1,000,000,000
American Airlines, Inc. [Member] | Revolving Credit Facility [Member] | 2013 Credit Facilities [Member] | Secured Debt [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	750,000,000
Principal outstanding or drawn	$ 0
Basis spread on variable rate	2.00%
American Airlines, Inc. [Member] | Revolving Credit Facility [Member] | 2014 Credit Facilities [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 1,643,000,000
American Airlines, Inc. [Member] | Revolving Credit Facility [Member] | 2014 Credit Facilities [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		1,600,000,000	1,500,000,000
American Airlines, Inc. [Member] | Revolving Credit Facility [Member] | 2014 Credit Facilities [Member] | Secured Debt [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	1,643,000,000
Principal outstanding or drawn	$ 0
Basis spread on variable rate	2.00%
American Airlines, Inc. [Member] | Revolving Credit Facility [Member] | April 2016 Credit Facilities [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 450,000,000
American Airlines, Inc. [Member] | Revolving Credit Facility [Member] | April 2016 Credit Facilities [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 450,000,000	$ 300,000,000
American Airlines, Inc. [Member] | Revolving Credit Facility [Member] | April 2016 Credit Facilities [Member] | Secured Debt [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	450,000,000
Principal outstanding or drawn	$ 0
Basis spread on variable rate	2.00%
American Airlines, Inc. [Member] | Revolving Credit Facility [Member] | Other Short-term Revolving Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 400,000,000
American Airlines, Inc. [Member] | Term Loan Facility [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Annual installment repayment, percent or original principal balance	1.00%
American Airlines, Inc. [Member] | Term Loan Facility [Member] | 2013 Credit Facilities [Member] | Secured Debt [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Aggregate principal issued	$ 1,919,000,000
Principal outstanding or drawn	$ 1,807,000,000
Basis spread on variable rate	1.75%
American Airlines, Inc. [Member] | Term Loan Facility [Member] | 2014 Credit Facilities [Member] | Secured Debt [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Aggregate principal issued	$ 1,250,000,000
Principal outstanding or drawn	$ 1,202,000,000
Basis spread on variable rate	2.00%
American Airlines, Inc. [Member] | Term Loan Facility [Member] | April 2016 Credit Facilities [Member] | Secured Debt [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Aggregate principal issued	$ 1,000,000,000
Principal outstanding or drawn	$ 970,000,000
Basis spread on variable rate	2.00%
American Airlines, Inc. [Member] | Term Loan Facility [Member] | December 2016 Credit Facilities [Member] | Secured Debt [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Aggregate principal issued	$ 1,250,000,000
Principal outstanding or drawn	$ 1,213,000,000
Basis spread on variable rate	2.00%
American Airlines, Inc. [Member] | Letter of Credit [Member] | 2013 Credit Facilities [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 100,000,000
American Airlines, Inc. [Member] | Letter of Credit [Member] | 2014 Credit Facilities [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 200,000,000

Debt - 2019-1 EETCs (Details)

Debt - 2019-1 EETCs (Details) - American Airlines, Inc. [Member] - Enhanced Equipment Trust Certificates (EETC) [Member]	12 Months Ended
	Dec. 31, 2019USD ($)	Aug. 31, 2019USD ($)Aircraft	Jun. 30, 2019USD ($)
Debt Instrument [Line Items]
Repayments of long-term debt	$ 608,000,000
Enhanced Equipment Trust Certificates 2019-1 [Member]
Debt Instrument [Line Items]
Principal amount		$ 1,100,000,000	$ 650,000,000
Number of aircraft financed by debt issuance | Aircraft		35
Repayments of long-term debt	$ 804,000,000
Number of aircrafts financed through repurchased debt | Aircraft		28
Remaining escrowed proceeds		$ 293,000,000

Debt - 2019-1 EETCs - Certain I

Debt - 2019-1 EETCs - Certain Information (Details) - American Airlines, Inc. [Member] - Enhanced Equipment Trust Certificates (EETC) [Member]	Dec. 31, 2019USD ($)
2019-1 EETC - Series AA [Member]
Debt Instrument [Line Items]
Aggregate principal issued	$ 579,000,000
Remaining escrowed proceeds	$ 155,000,000
Fixed interest rate per annum	3.15%
2019-1 EETC - Series A [Member]
Debt Instrument [Line Items]
Aggregate principal issued	$ 289,000,000
Remaining escrowed proceeds	$ 77,000,000
Fixed interest rate per annum	3.50%
2019-1 EETC - Series B [Member]
Debt Instrument [Line Items]
Aggregate principal issued	$ 229,000,000
Remaining escrowed proceeds	$ 61,000,000
Fixed interest rate per annum	3.85%

Debt - Equipment Loans and Othe

Debt - Equipment Loans and Other Notes Payable Issued in 2019 (Details) - American Airlines, Inc. [Member] - Secured Debt [Member] - Equipment Loans and Other Notes Payable [Member] $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Debt Instrument [Line Items]
Proceeds from notes payable	$ 1,700
Repayments of debt	$ 643
LIBOR [Member]
Debt Instrument [Line Items]
Long-term debt average interest rate	3.37%

Debt - Senior Notes (Details)

Debt - Senior Notes (Details) - Unsecured Debt [Member] - USD ($)	1 Months Ended
	May 31, 2019	Dec. 31, 2019
Senior Notes 4.625% Due in 2020 [Member]
Debt Instrument [Line Items]
Principal amount		$ 500,000,000
Fixed interest rate per annum		4.625%
Senior Notes 5.000% Due 2022 [Member]
Debt Instrument [Line Items]
Principal amount	$ 750,000,000	$ 750,000,000
Fixed interest rate per annum	5.00%	5.00%
Senior Notes [Member]
Debt Instrument [Line Items]
Redemption price percentage	101.00%

Debt - Guarantees (Details)

Debt - Guarantees (Details) - USD ($)	Dec. 31, 2019	May 31, 2019
Unsecured Debt [Member] | Senior Notes 4.625% Due in 2020 [Member]
Debt Instrument [Line Items]
Fixed interest rate per annum	4.625%
Unsecured Debt [Member] | Senior Notes 5.000% Due 2022 [Member]
Debt Instrument [Line Items]
Fixed interest rate per annum	5.00%	5.00%
Secured Debt [Member] | Special Facility Revenue Bonds [Member]
Debt Instrument [Line Items]
Guarantor obligations, maximum exposure, undiscounted	$ 725,000,000
Secured Debt [Member] | Credit Facilities And Certain EETC Financings [Member]
Debt Instrument [Line Items]
Guarantor obligations, maximum exposure, undiscounted	8,100,000,000
American Airlines, Inc. [Member] | Unsecured Debt [Member] | Senior Notes 4.625% Due in 2020 [Member]
Debt Instrument [Line Items]
Guarantor obligations, maximum exposure, undiscounted	500,000,000
American Airlines, Inc. [Member] | Unsecured Debt [Member] | Senior Notes 5.000% Due 2022 [Member]
Debt Instrument [Line Items]
Guarantor obligations, maximum exposure, undiscounted	$ 750,000,000
American Airlines, Inc. [Member] | Secured Debt [Member] | Special Facility Revenue Bonds [Member]
Debt Instrument [Line Items]
Fixed interest rate per annum	5.00%

Debt - Collateral-Related Coven

Debt - Collateral-Related Covenants (Details) - Secured Debt [Member]	12 Months Ended
	Dec. 31, 2019
2013 Credit Facilities [Member]
Debt Instrument [Line Items]
LTV Multiplier	1.6
Maximum LTV	62.50%
2014 Credit Facilities [Member]
Debt Instrument [Line Items]
LTV Multiplier	1.6
Maximum LTV	62.50%
April 2016 Credit Facilities [Member]
Debt Instrument [Line Items]
LTV Multiplier	1.6
Maximum LTV	62.50%
December 2016 Credit Facilities [Member]
Debt Instrument [Line Items]
LTV Multiplier	1.6
Maximum LTV	62.50%
American Airlines, Inc. [Member] | 2013 Credit Facilities [Member]
Debt Instrument [Line Items]
LTV Multiplier	1.6
Maximum LTV	62.50%
LTV as of Last Measurement Date	36.20%
American Airlines, Inc. [Member] | 2014 Credit Facilities [Member]
Debt Instrument [Line Items]
LTV Multiplier	1.6
Maximum LTV	62.50%
LTV as of Last Measurement Date	17.70%
American Airlines, Inc. [Member] | April 2016 Credit Facilities [Member]
Debt Instrument [Line Items]
LTV Multiplier	1.6
Maximum LTV	62.50%
LTV as of Last Measurement Date	36.20%
American Airlines, Inc. [Member] | December 2016 Credit Facilities [Member]
Debt Instrument [Line Items]
LTV Multiplier	1.6
Maximum LTV	62.50%
LTV as of Last Measurement Date	53.60%

Leases - Additional Information

Leases - Additional Information (Details) $ in Millions	Dec. 31, 2019USD ($)Aircraft	Dec. 31, 2019USD ($)Aircraft	Dec. 31, 2018USD ($)
Lessee, Lease, Description [Line Items]
Number of leased aircraft | Aircraft	636	636
Operating lease cost		$ 2,027	$ 1,907
Operating lease commitments that have not yet commenced	$ 2,000	$ 2,000
Operating lease commitments that have not yet commenced, number of aircraft | Aircraft	22	22
Operating lease commitments that have not yet commenced, lease term	10 years	10 years
Republic Holdings [Member]
Lessee, Lease, Description [Line Items]
Ownership interest	25.00%	25.00%
Republic [Member]
Lessee, Lease, Description [Line Items]
Operating lease cost		$ 236	226
American Airlines, Inc. [Member]
Lessee, Lease, Description [Line Items]
Number of leased aircraft | Aircraft	636	636
Operating lease cost		$ 2,012	1,889
Operating lease commitments that have not yet commenced	$ 2,000	$ 2,000
Operating lease commitments that have not yet commenced, number of aircraft | Aircraft	22	22
Operating lease commitments that have not yet commenced, lease term	10 years	10 years
American Airlines, Inc. [Member] | Republic Holdings [Member]
Lessee, Lease, Description [Line Items]
Ownership interest	25.00%	25.00%
American Airlines, Inc. [Member] | Republic [Member]
Lessee, Lease, Description [Line Items]
Operating lease cost		$ 236	$ 226
Minimum [Member]
Lessee, Lease, Description [Line Items]
Lease terms	1 year
Minimum [Member] | American Airlines, Inc. [Member]
Lessee, Lease, Description [Line Items]
Lease terms	1 year
Maximum [Member]
Lessee, Lease, Description [Line Items]
Lease terms	12 years
Maximum [Member] | American Airlines, Inc. [Member]
Lessee, Lease, Description [Line Items]
Lease terms	12 years

Leases - Components of Lease Ex

Leases - Components of Lease Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Operating lease cost	$ 2,027	$ 1,907
Finance lease cost:
Amortization of assets	79	78
Interest on lease liabilities	43	48
Variable lease cost	2,558	2,353
Total net lease cost	4,707	4,386
American Airlines, Inc. [Member]
Lessee, Lease, Description [Line Items]
Operating lease cost	2,012	1,889
Finance lease cost:
Amortization of assets	79	78
Interest on lease liabilities	43	48
Variable lease cost	2,542	2,353
Total net lease cost	$ 4,676	$ 4,368

Leases - Supplemental Balance S

Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Operating leases:
Operating lease ROU assets	$ 8,737	$ 9,151
Current operating lease liabilities	1,708	1,654
Noncurrent operating lease liabilities	7,421	7,902
Total operating lease liabilities	9,129	9,556
Finance leases:
Property and equipment, at cost	954	936
Accumulated amortization	(447)	(391)
Property and equipment, net	507	545
Current finance lease liabilities	112	81
Noncurrent finance lease liabilities	558	613
Total finance lease liabilities	$ 670	$ 694
Weighted average remaining lease term:
Operating leases	7 years 4 months 24 days	7 years 7 months 6 days
Finance leases	6 years 2 months 12 days	7 years 4 months 24 days
Weighted average discount rate:
Operating leases	4.70%	4.60%
Finance leases	6.20%	6.50%
American Airlines, Inc. [Member]
Operating leases:
Operating lease ROU assets	$ 8,694	$ 9,094
Current operating lease liabilities	1,695	1,639
Noncurrent operating lease liabilities	7,388	7,857
Total operating lease liabilities	9,083	9,496
Finance leases:
Property and equipment, at cost	954	936
Accumulated amortization	(447)	(391)
Property and equipment, net	507	545
Current finance lease liabilities	112	81
Noncurrent finance lease liabilities	558	613
Total finance lease liabilities	$ 670	$ 694
Weighted average remaining lease term:
Operating leases	7 years 4 months 24 days	7 years 7 months 6 days
Finance leases	6 years 2 months 12 days	7 years 4 months 24 days
Weighted average discount rate:
Operating leases	4.70%	4.60%
Finance leases	6.20%	6.50%

Leases - Supplemental Cash Flow

Leases - Supplemental Cash Flow and Other Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 2,013	$ 1,931
Operating cash flows from finance leases	43	48
Financing cash flows from finance leases	83	78
Non-cash transactions:
ROU assets acquired through operating leases	1,145	1,292
Operating lease conversion to finance lease	41	0
Property and equipment acquired through finance leases	20	0
Gain on sale leaseback transactions, net	107	59
American Airlines, Inc. [Member]
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	1,996	1,914
Operating cash flows from finance leases	43	48
Financing cash flows from finance leases	83	78
Non-cash transactions:
ROU assets acquired through operating leases	1,144	1,258
Operating lease conversion to finance lease	41	0
Property and equipment acquired through finance leases	20	0
Gain on sale leaseback transactions, net	$ 107	$ 59

Leases - Maturities of Lease Li

Leases - Maturities of Lease Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Operating Leases
2020	$ 1,990
2021	1,817
2022	1,620
2023	1,429
2024	1,030
2025 and thereafter	3,276
Total lease payments	11,162
Less: Imputed interest	(2,033)
Total operating lease liabilities	9,129	$ 9,556
Less: Current obligations	(1,708)	(1,654)
Long-term lease obligations	7,421	7,902
Finance Leases
2020	153
2021	128
2022	132
2023	110
2024	116
2025 and thereafter	171
Total lease payments	810
Less: Imputed interest	(140)
Total finance lease liabilities	670	694
Less: Current obligations	(112)	(81)
Long-term lease obligations	558	613
American Airlines, Inc. [Member]
Operating Leases
2020	1,974
2021	1,804
2022	1,608
2023	1,423
2024	1,028
2025 and thereafter	3,268
Total lease payments	11,105
Less: Imputed interest	(2,022)
Total operating lease liabilities	9,083	9,496
Less: Current obligations	(1,695)	(1,639)
Long-term lease obligations	7,388	7,857
Finance Leases
2020	153
2021	128
2022	132
2023	110
2024	116
2025 and thereafter	171
Total lease payments	810
Less: Imputed interest	(140)
Total finance lease liabilities	670	694
Less: Current obligations	(112)	(81)
Long-term lease obligations	$ 558	$ 613

Income Taxes - Components of In

Income Taxes - Components of Income Tax Provision (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current income tax provision:
State and Local	$ 2	$ 3	$ 10
Foreign	8	29	14
Current income tax provision	10	32	24
Deferred income tax provision:
Federal	498	390	2,026
State and Local	62	50	63
Deferred income tax provision	560	440	2,089
Total income tax provision	570	472	2,113
American Airlines, Inc. [Member]
Current income tax provision:
State and Local	2	3	14
Foreign	8	28	10
Current income tax provision	10	31	24
Deferred income tax provision:
Federal	567	453	2,176
State and Local	56	50	70
Deferred income tax provision	623	503	2,246
Total income tax provision	$ 633	$ 534	$ 2,270

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Income Tax Provision (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Line Items]
Statutory income tax provision	$ 474	$ 396	$ 1,188
State income tax provision, net of federal tax effect	47	44	59
Book expenses not deductible for tax purposes	31	12	33
Foreign income taxes, net of federal tax effect	8	23	7
Change in valuation allowance	4	(6)	(3)
2017 Tax Act	0	0	823
Other, net	6	3	6
Total income tax provision	570	472	2,113
American Airlines, Inc. [Member]
Income Tax Disclosure [Line Items]
Statutory income tax provision	547	460	1,244
State income tax provision, net of federal tax effect	41	46	53
Book expenses not deductible for tax purposes	29	10	30
Foreign income taxes, net of federal tax effect	8	22	6
Change in valuation allowance	5	(6)	4
2017 Tax Act	0	0	924
Other, net	3	2	9
Total income tax provision	$ 633	$ 534	$ 2,270

Income Taxes - Deferred Tax Ass

Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Operating loss carryforwards	$ 2,103	$ 2,343
Leases	2,077	2,189
Loyalty program liability	1,755	1,770
Pensions	1,229	1,430
Postretirement benefits other than pensions	145	145
Rent expense	126	136
Alternative minimum tax (AMT) credit carryforwards	90	175
Reorganization items	30	33
Other	613	631
Total deferred tax assets	8,168	8,852
Valuation allowance	(34)	(30)
Net deferred tax assets	8,134	8,822
Deferred tax liabilities:
Accelerated depreciation and amortization	(5,196)	(5,280)
Leases	(1,979)	(2,081)
Other	(343)	(326)
Total deferred tax liabilities	(7,518)	(7,687)
Net deferred tax asset	616	1,135
American Airlines, Inc. [Member]
Deferred tax assets:
Operating loss carryforwards	2,115	2,420
Leases	2,067	2,176
Loyalty program liability	1,755	1,770
Pensions	1,219	1,421
Postretirement benefits other than pensions	145	145
Rent expense	126	136
Alternative minimum tax (AMT) credit carryforwards	118	231
Reorganization items	30	33
Other	569	588
Total deferred tax assets	8,144	8,920
Valuation allowance	(24)	(19)
Net deferred tax assets	8,120	8,901
Deferred tax liabilities:
Accelerated depreciation and amortization	(5,153)	(5,243)
Leases	(1,968)	(2,068)
Other	(340)	(321)
Total deferred tax liabilities	(7,461)	(7,632)
Net deferred tax asset	$ 659	$ 1,269

Income Taxes - Additional Discl

Income Taxes - Additional Disclosures (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Line Items]
Income tax provision	$ 570	$ 472	$ 2,113
Income tax expense, effective rate	25.00%
Impact of the 2017 Tax Act	$ 0	0	823
Alternative Minimum Tax Credit Carryforward [Member]
Income Taxes [Line Items]
Alternative minimum tax credit carryforwards	170
Federal [Member]
Income Taxes [Line Items]
Gross NOL carryforwards	9,100
Federal NOL carryforwards, maximum allowable utilization	9,000
Federal NOL carryforwards, remaining amount	7,300
State [Member]
Income Taxes [Line Items]
Gross NOL carryforwards	3,000
American Airlines, Inc. [Member]
Income Taxes [Line Items]
Income tax provision	$ 633	534	2,270
Income tax expense, effective rate	24.00%
Impact of the 2017 Tax Act	$ 0	$ 0	$ 924
American Airlines, Inc. [Member] | Alternative Minimum Tax Credit Carryforward [Member]
Income Taxes [Line Items]
Alternative minimum tax credit carryforwards	226
American Airlines, Inc. [Member] | Federal [Member]
Income Taxes [Line Items]
Gross NOL carryforwards	9,200
Federal NOL carryforwards, maximum allowable utilization	9,500
Federal NOL carryforwards, remaining amount	7,200
American Airlines, Inc. [Member] | State [Member]
Income Taxes [Line Items]
Gross NOL carryforwards	$ 2,900

Risk Management (Details)

Risk Management (Details) $ in Billions	Dec. 31, 2019USD ($)
Debt Instrument [Line Items]
Principal amount of long-term variable rate debt	$ 9.6
Variable Rate Debt [Member]
Debt Instrument [Line Items]
Weighted average effective interest rate on variable rate debt	3.60%
American Airlines, Inc. [Member]
Debt Instrument [Line Items]
Principal amount of long-term variable rate debt	$ 9.6
American Airlines, Inc. [Member] | Variable Rate Debt [Member]
Debt Instrument [Line Items]
Weighted average effective interest rate on variable rate debt	3.60%

Fair Value Measurements and O_3

Fair Value Measurements and Other Investments - Summary of Assets Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	$ 3,546	$ 4,485
Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	3,546	4,485
Restricted cash and short-term investments	158	154
Long-term investments	204	189
Total	3,908	4,828
Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	333	16
Restricted cash and short-term investments	10	12
Long-term investments	204	189
Total	547	217
Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	3,213	4,469
Restricted cash and short-term investments	148	142
Long-term investments	0	0
Total	3,361	4,611
Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
Restricted cash and short-term investments	0	0
Long-term investments	0	0
Total	0	0
Recurring [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	333	16
Recurring [Member] | Money Market Funds [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	333	16
Recurring [Member] | Money Market Funds [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
Recurring [Member] | Money Market Funds [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
Recurring [Member] | Bank Notes / Certificates of Deposit / Time Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	2,107	2,436
Recurring [Member] | Bank Notes / Certificates of Deposit / Time Deposits [Member] | Maturity Dates Exceeding One Year [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	1,100
Recurring [Member] | Bank Notes / Certificates of Deposit / Time Deposits [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
Recurring [Member] | Bank Notes / Certificates of Deposit / Time Deposits [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	2,107	2,436
Recurring [Member] | Bank Notes / Certificates of Deposit / Time Deposits [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
Recurring [Member] | Corporate debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	1,021	1,658
Recurring [Member] | Corporate debt [Member] | Maturity Dates Exceeding One Year [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	95
Recurring [Member] | Corporate debt [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
Recurring [Member] | Corporate debt [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	1,021	1,658
Recurring [Member] | Corporate debt [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
Recurring [Member] | Repurchase Agreements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	85	375
Recurring [Member] | Repurchase Agreements [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
Recurring [Member] | Repurchase Agreements [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	85	375
Recurring [Member] | Repurchase Agreements [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
American Airlines, Inc. [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	3,543	4,482
American Airlines, Inc. [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	3,543	4,482
Restricted cash and short-term investments	158	154
Long-term investments	204	189
Total	3,905	4,825
American Airlines, Inc. [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	331	14
Restricted cash and short-term investments	10	12
Long-term investments	204	189
Total	545	215
American Airlines, Inc. [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	3,212	4,468
Restricted cash and short-term investments	148	142
Long-term investments	0	0
Total	3,360	4,610
American Airlines, Inc. [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
Restricted cash and short-term investments	0	0
Long-term investments	0	0
Total	0	0
American Airlines, Inc. [Member] | Recurring [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	331	14
American Airlines, Inc. [Member] | Recurring [Member] | Money Market Funds [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	331	14
American Airlines, Inc. [Member] | Recurring [Member] | Money Market Funds [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
American Airlines, Inc. [Member] | Recurring [Member] | Money Market Funds [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
American Airlines, Inc. [Member] | Recurring [Member] | Bank Notes / Certificates of Deposit / Time Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	2,106	2,435
American Airlines, Inc. [Member] | Recurring [Member] | Bank Notes / Certificates of Deposit / Time Deposits [Member] | Maturity Dates Exceeding One Year [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	1,100
American Airlines, Inc. [Member] | Recurring [Member] | Bank Notes / Certificates of Deposit / Time Deposits [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
American Airlines, Inc. [Member] | Recurring [Member] | Bank Notes / Certificates of Deposit / Time Deposits [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	2,106	2,435
American Airlines, Inc. [Member] | Recurring [Member] | Bank Notes / Certificates of Deposit / Time Deposits [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
American Airlines, Inc. [Member] | Recurring [Member] | Corporate debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	1,021	1,658
American Airlines, Inc. [Member] | Recurring [Member] | Corporate debt [Member] | Maturity Dates Exceeding One Year [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	95
American Airlines, Inc. [Member] | Recurring [Member] | Corporate debt [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
American Airlines, Inc. [Member] | Recurring [Member] | Corporate debt [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	1,021	1,658
American Airlines, Inc. [Member] | Recurring [Member] | Corporate debt [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
American Airlines, Inc. [Member] | Recurring [Member] | Repurchase Agreements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	85	375
American Airlines, Inc. [Member] | Recurring [Member] | Repurchase Agreements [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
American Airlines, Inc. [Member] | Recurring [Member] | Repurchase Agreements [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	85	375
American Airlines, Inc. [Member] | Recurring [Member] | Repurchase Agreements [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	$ 0	$ 0
China Southern Airlines [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Ownership interest	2.20%
China Southern Airlines [Member] | American Airlines, Inc. [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Ownership interest	2.20%

Fair Value Measurements and O_4

Fair Value Measurements and Other Investments - Schedule of Carrying Value and Estimated Fair Value of Long-Term Debt, Including Current Maturities (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Carrying Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, including current maturities	$ 23,645	$ 23,779
Fair Value [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, including current maturities	24,508	23,775
American Airlines, Inc. [Member] | Carrying Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, including current maturities	22,372	22,503
American Airlines, Inc. [Member] | Fair Value [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, including current maturities	$ 23,196	$ 22,497

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Increase (decrease) for plan amendment				$ (1,900)
Amortization period of gains losses related to plan amendment				8 years
Unamortized actuarial gain	$ 150
Weighted average expected rate of return on plan assets	8.00%
Estimated future employer contributions for next fiscal year	$ 196
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
The estimated actuarial gain (loss) and prior service benefit (cost) that will be amortized into net periodic benefit cost over the next fiscal year	$ 194
Weighted average expected rate of return on plan assets	8.00%	8.00%	8.00%
Retiree Medical And Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
The estimated actuarial gain (loss) and prior service benefit (cost) that will be amortized into net periodic benefit cost over the next fiscal year	$ (167)
Weighted average expected rate of return on plan assets	8.00%	8.00%	8.00%
American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Increase (decrease) for plan amendment				$ (1,900)
Amortization period of gains losses related to plan amendment				8 years
Unamortized actuarial gain	$ 150
Weighted average expected rate of return on plan assets	8.00%
Estimated future employer contributions for next fiscal year	$ 193
American Airlines, Inc. [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
The estimated actuarial gain (loss) and prior service benefit (cost) that will be amortized into net periodic benefit cost over the next fiscal year	$ 193
Weighted average expected rate of return on plan assets	8.00%	8.00%	8.00%
American Airlines, Inc. [Member] | Retiree Medical And Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
The estimated actuarial gain (loss) and prior service benefit (cost) that will be amortized into net periodic benefit cost over the next fiscal year	$ (167)
Weighted average expected rate of return on plan assets	8.00%	8.00%	8.00%

Employee Benefit Plans - Schedu

Employee Benefit Plans - Schedule of Changes in Projected Benefit Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Pension Benefits [Member]
Reconciliation of benefit obligation:
Benefit obligation at beginning of period	$ 16,378	$ 18,275
Service cost	2	3	$ 2
Interest cost	703	674	721
Actuarial (gain) loss	1,965	(1,910)
Settlements	(2)	(4)
Benefit payments	(689)	(662)
Other	1	2
Benefit obligation at end of period	18,358	16,378	18,275
Retiree Medical And Other Postretirement Benefits [Member]
Reconciliation of benefit obligation:
Benefit obligation at beginning of period	837	1,011
Service cost	3	5	4
Interest cost	33	35	39
Actuarial (gain) loss	20	(133)
Settlements	0	0
Benefit payments	(74)	(81)
Other	5	0
Benefit obligation at end of period	824	837	1,011
American Airlines, Inc. [Member] | Pension Benefits [Member]
Reconciliation of benefit obligation:
Benefit obligation at beginning of period	16,282	18,175
Service cost	2	2	2
Interest cost	699	670	717
Actuarial (gain) loss	1,951	(1,905)
Settlements	(2)	(4)
Benefit payments	(686)	(659)
Other	0	3
Benefit obligation at end of period	18,246	16,282	18,175
American Airlines, Inc. [Member] | Retiree Medical And Other Postretirement Benefits [Member]
Reconciliation of benefit obligation:
Benefit obligation at beginning of period	837	1,010
Service cost	3	5	4
Interest cost	33	35	39
Actuarial (gain) loss	20	(132)
Settlements	0	0
Benefit payments	(74)	(81)
Other	5	0
Benefit obligation at end of period	$ 824	$ 837	$ 1,010

Employee Benefit Plans - Sche_2

Employee Benefit Plans - Schedule of Changes in Fair Value of Plan Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Pension Benefits [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of period	$ 10,053	$ 11,395
Actual return (loss) on plan assets	2,305	(1,151)
Employer contributions	1,230	475
Settlements	(2)	(4)
Benefit payments	(689)	(662)
Fair value of plan assets at end of period	12,897	10,053
Funded status at end of period	(5,461)	(6,325)
Supplemental contributions by employer	444	433
Minimum required cash contribution	786	42
Retiree Medical And Other Postretirement Benefits [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of period	225	295
Actual return (loss) on plan assets	41	(24)
Employer contributions	12	35
Settlements	0	0
Benefit payments	(74)	(81)
Fair value of plan assets at end of period	204	225
Funded status at end of period	(620)	(612)
American Airlines, Inc. [Member] | Pension Benefits [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of period	10,001	11,340
Actual return (loss) on plan assets	2,292	(1,148)
Employer contributions	1,224	472
Settlements	(2)	(4)
Benefit payments	(686)	(659)
Fair value of plan assets at end of period	12,829	10,001
Funded status at end of period	(5,417)	(6,281)
Supplemental contributions by employer	444	433
Minimum required cash contribution	780	39
American Airlines, Inc. [Member] | Retiree Medical And Other Postretirement Benefits [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of period	225	295
Actual return (loss) on plan assets	41	(24)
Employer contributions	12	35
Settlements	0	0
Benefit payments	(74)	(81)
Fair value of plan assets at end of period	204	225
Funded status at end of period	$ (620)	$ (612)

Employee Benefit Plans - Sche_3

Employee Benefit Plans - Schedule of Amounts Recognized in Consolidated Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Noncurrent liability	$ 6,052	$ 6,907
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Current liability	5	7
Noncurrent liability	5,456	6,318
Total liabilities	5,461	6,325
Retiree Medical And Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Current liability	24	23
Noncurrent liability	596	589
Total liabilities	620	612
American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Noncurrent liability	6,008	6,863
American Airlines, Inc. [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Current liability	5	7
Noncurrent liability	5,412	6,274
Total liabilities	5,417	6,281
American Airlines, Inc. [Member] | Retiree Medical And Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Current liability	24	23
Noncurrent liability	596	589
Total liabilities	$ 620	$ 612

Employee Benefit Plans - Sche_4

Employee Benefit Plans - Schedule of Amounts Recognized in Other Comprehensive Income (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	$ 5,680	$ 5,356
Prior service cost (benefit)	104	131
Total accumulated other comprehensive loss (income), pre-tax	5,784	5,487
Retiree Medical And Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	(426)	(452)
Prior service cost (benefit)	(120)	(362)
Total accumulated other comprehensive loss (income), pre-tax	(546)	(814)
American Airlines, Inc. [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	5,662	5,341
Prior service cost (benefit)	102	131
Total accumulated other comprehensive loss (income), pre-tax	5,764	5,472
American Airlines, Inc. [Member] | Retiree Medical And Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	(426)	(452)
Prior service cost (benefit)	(120)	(362)
Total accumulated other comprehensive loss (income), pre-tax	$ (546)	$ (814)

Employee Benefit Plans - Sche_5

Employee Benefit Plans - Schedule of Accumulated Benefit Obligations Exceeding Fair Value of Plan Assets (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 18,327	$ 16,351
Accumulated benefit obligation	18,315	16,341
Fair value of plan assets	12,862	10,023
ABO less fair value of plan assets	5,453	6,318
Retiree Medical And Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	824	837
Fair value of plan assets	204	225
American Airlines, Inc. [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	18,215	16,254
Accumulated benefit obligation	18,204	16,246
Fair value of plan assets	12,794	9,971
ABO less fair value of plan assets	5,410	6,275
American Airlines, Inc. [Member] | Retiree Medical And Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	824	837
Fair value of plan assets	$ 204	$ 225

Employee Benefit Plans - Compon

Employee Benefit Plans - Components of Net Periodic Benefit Cost (Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Pension Benefits [Member]
Defined benefit plans:
Service cost	$ 2	$ 3	$ 2
Interest cost	703	674	721
Expected return on assets	(815)	(905)	(790)
Settlements	0	0	1
Amortization of:
Prior service cost (benefit)	28	28	28
Unrecognized net loss (gain)	150	141	144
Net periodic benefit cost (income)	68	(59)	106
Retiree Medical And Other Postretirement Benefits [Member]
Defined benefit plans:
Service cost	3	5	4
Interest cost	33	35	39
Expected return on assets	(15)	(24)	(21)
Settlements	0	0	0
Amortization of:
Prior service cost (benefit)	(236)	(236)	(237)
Unrecognized net loss (gain)	(31)	(21)	(23)
Net periodic benefit cost (income)	(246)	(241)	(238)
American Airlines, Inc. [Member] | Pension Benefits [Member]
Defined benefit plans:
Service cost	2	2	2
Interest cost	699	670	717
Expected return on assets	(811)	(901)	(786)
Settlements	0	0	1
Amortization of:
Prior service cost (benefit)	28	28	28
Unrecognized net loss (gain)	150	140	144
Net periodic benefit cost (income)	68	(61)	106
American Airlines, Inc. [Member] | Retiree Medical And Other Postretirement Benefits [Member]
Defined benefit plans:
Service cost	3	5	4
Interest cost	33	35	39
Expected return on assets	(15)	(24)	(21)
Settlements			0
Amortization of:
Prior service cost (benefit)	(236)	(236)	(237)
Unrecognized net loss (gain)	(31)	(21)	(23)
Net periodic benefit cost (income)	$ (246)	$ (241)	$ (238)

Employee Benefit Plans - Sche_6

Employee Benefit Plans - Schedule of Assumption Used to Determine Benefit Obligations (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net periodic benefit cost (income):
Weighted average expected rate of return on plan assets	8.00%
Pension Benefits [Member]
Benefit obligations:
Weighted average discount rate	3.40%	4.40%
Net periodic benefit cost (income):
Weighted average discount rate	4.40%	3.80%	4.30%
Weighted average expected rate of return on plan assets	8.00%	8.00%	8.00%
Retiree Medical And Other Postretirement Benefits [Member]
Benefit obligations:
Weighted average discount rate	3.30%	4.30%
Net periodic benefit cost (income):
Weighted average discount rate	4.30%	3.60%	4.10%
Weighted average expected rate of return on plan assets	8.00%	8.00%	8.00%
Weighted average health care cost trend rate assumed for next year	3.70%	3.90%	4.20%
Weighted average health care cost trend rate assumed for 2025 and thereafter	3.30%
American Airlines, Inc. [Member]
Net periodic benefit cost (income):
Weighted average expected rate of return on plan assets	8.00%
American Airlines, Inc. [Member] | Pension Benefits [Member]
Benefit obligations:
Weighted average discount rate	3.40%	4.40%
Net periodic benefit cost (income):
Weighted average discount rate	4.40%	3.80%	4.30%
Weighted average expected rate of return on plan assets	8.00%	8.00%	8.00%
American Airlines, Inc. [Member] | Retiree Medical And Other Postretirement Benefits [Member]
Benefit obligations:
Weighted average discount rate	3.30%	4.30%
Net periodic benefit cost (income):
Weighted average discount rate	4.30%	3.60%	4.10%
Weighted average expected rate of return on plan assets	8.00%	8.00%	8.00%
Weighted average health care cost trend rate assumed for next year	3.70%	3.90%	4.20%
Weighted average health care cost trend rate assumed for 2025 and thereafter	3.30%

Employee Benefit Plans - Sche_7

Employee Benefit Plans - Schedule of One Percentage Point Change in Assumed Health Care Cost Trend Rates (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Defined Benefit Plan Disclosure [Line Items]
Increase (decrease) on service and interest cost, 1% Increase	$ 1
Increase (decrease) on benefit obligation, 1% Increase	40
Increase (decrease) on service and interest cost, 1% Decrease	(1)
Increase (decrease) on benefits obligation, 1% Decrease	(40)
American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Increase (decrease) on service and interest cost, 1% Increase	1
Increase (decrease) on benefit obligation, 1% Increase	40
Increase (decrease) on service and interest cost, 1% Decrease	(1)
Increase (decrease) on benefits obligation, 1% Decrease	$ (40)

Employee Benefit Plans - Sche_8

Employee Benefit Plans - Schedule of Expected Future Service Benefit Payments (Details) $ in Millions	Dec. 31, 2019USD ($)
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
2020	$ 753
2021	792
2022	832
2023	874
2024	914
2025-2029	5,045
Retiree Medical And Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
2020	80
2021	71
2022	66
2023	64
2024	61
2025-2029	265
American Airlines, Inc. [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
2020	749
2021	788
2022	827
2023	869
2024	910
2025-2029	5,017
American Airlines, Inc. [Member] | Retiree Medical And Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
2020	80
2021	71
2022	66
2023	64
2024	61
2025-2029	$ 265

Employee Benefit Plans - Sche_9

Employee Benefit Plans - Schedule of Allocation of Plan Assets (Details)	Dec. 31, 2019
Equity [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	45.00%
Equity [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	80.00%
U.S. Large [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	15.00%
U.S. Large [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	40.00%
U.S. Small/Mid [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	2.00%
U.S. Small/Mid [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	10.00%
International [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	10.00%
International [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	25.00%
Emerging Markets [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	2.00%
Emerging Markets [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	15.00%
Alternative Investments [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	5.00%
Alternative Investments [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	30.00%
Fixed Income [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	20.00%
Fixed Income [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	55.00%
U.S. Long Duration [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	15.00%
U.S. Long Duration [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	45.00%
High Yield and Emerging Markets [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
High Yield and Emerging Markets [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	10.00%
Private Income [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
Private Income [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	10.00%
Other [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
Other [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	5.00%
Cash Equivalents [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
Cash Equivalents [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	20.00%
American Airlines, Inc. [Member] | Equity [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	45.00%
American Airlines, Inc. [Member] | Equity [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	80.00%
American Airlines, Inc. [Member] | U.S. Large [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	15.00%
American Airlines, Inc. [Member] | U.S. Large [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	40.00%
American Airlines, Inc. [Member] | U.S. Small/Mid [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	2.00%
American Airlines, Inc. [Member] | U.S. Small/Mid [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	10.00%
American Airlines, Inc. [Member] | International [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	10.00%
American Airlines, Inc. [Member] | International [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	25.00%
American Airlines, Inc. [Member] | Emerging Markets [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	2.00%
American Airlines, Inc. [Member] | Emerging Markets [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	15.00%
American Airlines, Inc. [Member] | Alternative Investments [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	5.00%
American Airlines, Inc. [Member] | Alternative Investments [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	30.00%
American Airlines, Inc. [Member] | Fixed Income [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	20.00%
American Airlines, Inc. [Member] | Fixed Income [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	55.00%
American Airlines, Inc. [Member] | U.S. Long Duration [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	15.00%
American Airlines, Inc. [Member] | U.S. Long Duration [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	45.00%
American Airlines, Inc. [Member] | High Yield and Emerging Markets [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
American Airlines, Inc. [Member] | High Yield and Emerging Markets [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	10.00%
American Airlines, Inc. [Member] | Private Income [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
American Airlines, Inc. [Member] | Private Income [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	10.00%
American Airlines, Inc. [Member] | Other [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
American Airlines, Inc. [Member] | Other [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	5.00%
American Airlines, Inc. [Member] | Cash Equivalents [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	0.00%
American Airlines, Inc. [Member] | Cash Equivalents [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic target asset allocation	5.00%

Employee Benefit Plans - Sch_10

Employee Benefit Plans - Schedule of Fair Value of Pension Plan Assets by Asset Category (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 12,897	$ 10,053	$ 11,395
Pension Benefits [Member] | Private market partnerships [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	10	7	14
Pension Benefits [Member] | Insurance Group Annuity Contracts [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2	2	2
Pension Benefits [Member] | Recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	12,897	10,053
Pension Benefits [Member] | Recurring [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5,858	6,027
Pension Benefits [Member] | Recurring [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,140	2,602
Pension Benefits [Member] | Recurring [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	12	9
Pension Benefits [Member] | Recurring [Member] | Cash and cash equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	20	23
Pension Benefits [Member] | Recurring [Member] | Cash and cash equivalents [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	20	23
Pension Benefits [Member] | Recurring [Member] | Cash and cash equivalents [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits [Member] | Recurring [Member] | Cash and cash equivalents [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits [Member] | Recurring [Member] | International markets [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,769	3,181
Pension Benefits [Member] | Recurring [Member] | International markets [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,769	3,181
Pension Benefits [Member] | Recurring [Member] | International markets [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits [Member] | Recurring [Member] | International markets [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits [Member] | Recurring [Member] | Large-cap companies [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,312	2,021
Pension Benefits [Member] | Recurring [Member] | Large-cap companies [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,312	2,021
Pension Benefits [Member] | Recurring [Member] | Large-cap companies [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits [Member] | Recurring [Member] | Large-cap companies [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits [Member] | Recurring [Member] | Mid-cap companies [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	543	583
Pension Benefits [Member] | Recurring [Member] | Mid-cap companies [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	543	583
Pension Benefits [Member] | Recurring [Member] | Mid-cap companies [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits [Member] | Recurring [Member] | Mid-cap companies [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits [Member] | Recurring [Member] | Small-cap companies [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	97	122
Pension Benefits [Member] | Recurring [Member] | Small-cap companies [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	97	122
Pension Benefits [Member] | Recurring [Member] | Small-cap companies [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits [Member] | Recurring [Member] | Small-cap companies [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits [Member] | Recurring [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	68	52
Pension Benefits [Member] | Recurring [Member] | Mutual Funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	68	52
Pension Benefits [Member] | Recurring [Member] | Mutual Funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits [Member] | Recurring [Member] | Mutual Funds [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits [Member] | Recurring [Member] | Corporate debt [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,804	2,116
Pension Benefits [Member] | Recurring [Member] | Corporate debt [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits [Member] | Recurring [Member] | Corporate debt [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,804	2,116
Pension Benefits [Member] | Recurring [Member] | Corporate debt [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits [Member] | Recurring [Member] | Government Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	923	228
Pension Benefits [Member] | Recurring [Member] | Government Securities [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits [Member] | Recurring [Member] | Government Securities [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	923	228
Pension Benefits [Member] | Recurring [Member] | Government Securities [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits [Member] | Recurring [Member] | U.S. municipal securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	51	40
Pension Benefits [Member] | Recurring [Member] | U.S. municipal securities [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits [Member] | Recurring [Member] | U.S. municipal securities [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	51	40
Pension Benefits [Member] | Recurring [Member] | U.S. municipal securities [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits [Member] | Recurring [Member] | Mortgage backed securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4
Pension Benefits [Member] | Recurring [Member] | Mortgage backed securities [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Pension Benefits [Member] | Recurring [Member] | Mortgage backed securities [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4
Pension Benefits [Member] | Recurring [Member] | Mortgage backed securities [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Pension Benefits [Member] | Recurring [Member] | Private market partnerships [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	10	7
Pension Benefits [Member] | Recurring [Member] | Private market partnerships [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits [Member] | Recurring [Member] | Private market partnerships [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits [Member] | Recurring [Member] | Private market partnerships [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	10	7
Pension Benefits [Member] | Recurring [Member] | Private market partnerships [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,464	1,188
Pension Benefits [Member] | Recurring [Member] | Common/collective trusts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	358	218
Pension Benefits [Member] | Recurring [Member] | Common/collective trusts [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits [Member] | Recurring [Member] | Common/collective trusts [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	358	218
Pension Benefits [Member] | Recurring [Member] | Common/collective trusts [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits [Member] | Recurring [Member] | Common/collective trusts and 103-12 Investment Trust measured at net asset value [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,423	227
Pension Benefits [Member] | Recurring [Member] | Insurance Group Annuity Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2	2
Pension Benefits [Member] | Recurring [Member] | Insurance Group Annuity Contracts [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits [Member] | Recurring [Member] | Insurance Group Annuity Contracts [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits [Member] | Recurring [Member] | Insurance Group Annuity Contracts [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2	2
Pension Benefits [Member] | Recurring [Member] | Dividend and interest receivable [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	53	47
Pension Benefits [Member] | Recurring [Member] | Dividend and interest receivable [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	53	47
Pension Benefits [Member] | Recurring [Member] | Dividend and interest receivable [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits [Member] | Recurring [Member] | Dividend and interest receivable [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits [Member] | Recurring [Member] | Due to/from brokers for sale of securities - net [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(4)	5
Pension Benefits [Member] | Recurring [Member] | Due to/from brokers for sale of securities - net [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(4)	5
Pension Benefits [Member] | Recurring [Member] | Due to/from brokers for sale of securities - net [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits [Member] | Recurring [Member] | Due to/from brokers for sale of securities - net [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits [Member] | Recurring [Member] | Other liabilities - net [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		(7)
Pension Benefits [Member] | Recurring [Member] | Other liabilities - net [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		(7)
Pension Benefits [Member] | Recurring [Member] | Other liabilities - net [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Pension Benefits [Member] | Recurring [Member] | Other liabilities - net [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
American Airlines, Inc. [Member] | Private market partnerships [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	10	7	14
American Airlines, Inc. [Member] | Insurance Group Annuity Contracts [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2	2	2
American Airlines, Inc. [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	12,829	10,001	$ 11,340
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	12,829	10,001
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5,790	5,975
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,140	2,602
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	12	9
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Cash and cash equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	20	23
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Cash and cash equivalents [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	20	23
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Cash and cash equivalents [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Cash and cash equivalents [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | International markets [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,769	3,181
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | International markets [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,769	3,181
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | International markets [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | International markets [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Large-cap companies [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,312	2,021
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Large-cap companies [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,312	2,021
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Large-cap companies [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Large-cap companies [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Mid-cap companies [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	543	583
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Mid-cap companies [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	543	583
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Mid-cap companies [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Mid-cap companies [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Small-cap companies [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	97	122
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Small-cap companies [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	97	122
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Small-cap companies [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Small-cap companies [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Corporate debt [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,804	2,116
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Corporate debt [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Corporate debt [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,804	2,116
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Corporate debt [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Government Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	923	228
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Government Securities [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Government Securities [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	923	228
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Government Securities [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | U.S. municipal securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	51	40
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | U.S. municipal securities [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | U.S. municipal securities [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	51	40
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | U.S. municipal securities [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Mortgage backed securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Mortgage backed securities [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Mortgage backed securities [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Mortgage backed securities [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Private market partnerships [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	10	7
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Private market partnerships [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Private market partnerships [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Private market partnerships [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	10	7
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Private market partnerships [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,464	1,188
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Common/collective trusts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	358	218
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Common/collective trusts [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Common/collective trusts [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	358	218
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Common/collective trusts [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Common/collective trusts and 103-12 Investment Trust measured at net asset value [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,423	227
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Insurance Group Annuity Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2	2
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Insurance Group Annuity Contracts [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Insurance Group Annuity Contracts [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Insurance Group Annuity Contracts [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2	2
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Dividend and interest receivable [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	53	47
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Dividend and interest receivable [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	53	47
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Dividend and interest receivable [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Dividend and interest receivable [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Due to/from brokers for sale of securities - net [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(4)	5
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Due to/from brokers for sale of securities - net [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(4)	5
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Due to/from brokers for sale of securities - net [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Due to/from brokers for sale of securities - net [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 0	0
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Other liabilities - net [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		(7)
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Other liabilities - net [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		(7)
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Other liabilities - net [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
American Airlines, Inc. [Member] | Pension Benefits [Member] | Recurring [Member] | Other liabilities - net [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 0

Employee Benefit Plans - Sch_11

Employee Benefit Plans - Schedule of Fair Value of Pension Plan Assets by Asset Category - Additional Information (Details) - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
International markets, United Kingdom [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	14.00%	17.00%
International markets, United Kingdom [Member] | American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	14.00%	17.00%
International markets, Switzerland [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	8.00%	7.00%
International markets, Switzerland [Member] | American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	8.00%	7.00%
International markets, Ireland [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	8.00%	6.00%
International markets, Ireland [Member] | American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	8.00%	6.00%
International markets, Japan [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	7.00%	10.00%
International markets, Japan [Member] | American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	7.00%	10.00%
International markets, France [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	7.00%	8.00%
International markets, France [Member] | American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	7.00%	8.00%
International markets, South Korea [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	6.00%
International markets, South Korea [Member] | American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	6.00%
International markets, Canada [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	6.00%
International markets, Canada [Member] | American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	6.00%
International markets, emerging markets [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	18.00%	17.00%
International markets, emerging markets [Member] | American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	18.00%	17.00%
International markets, no concentration greater than 5% in any one country[Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	26.00%	35.00%
International markets, no concentration greater than 5% in any one country[Member] | American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	26.00%	35.00%
Mutual funds [Member] | U.S. Companies [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	40.00%	37.00%
Mutual funds [Member] | US Treasuries and Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	33.00%	38.00%
Mutual funds [Member] | International Companies [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	27.00%	25.00%
Mutual funds [Member] | International Companies [Member] | American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	24.00%	30.00%
Corporate debt [Member] | U.S. Companies [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	86.00%	85.00%
Corporate debt [Member] | U.S. Companies [Member] | American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	86.00%	85.00%
Corporate debt [Member] | International Companies [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	11.00%	12.00%
Corporate debt [Member] | International Companies [Member] | American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	11.00%	12.00%
Corporate debt [Member] | Corporate Debt with A Standard and Poor's (S&P) Rating Lower than A [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	76.00%	77.00%
Corporate debt [Member] | Corporate Debt with A Standard and Poor's (S&P) Rating Lower than A [Member] | American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	76.00%	77.00%
Corporate debt [Member] | Corporate Debt with Standard and Poor's (S&P) Rating A or Higher [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	24.00%	23.00%
Corporate debt [Member] | Corporate Debt with Standard and Poor's (S&P) Rating A or Higher [Member] | American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	24.00%	23.00%
Corporate debt [Member] | Emerging Market Companies [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	3.00%	3.00%
Corporate debt [Member] | Emerging Market Companies [Member] | American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	3.00%	3.00%
Government securities [Member] | Domestic Government Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	79.00%	32.00%
Government securities [Member] | Domestic Government Securities [Member] | American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	79.00%	32.00%
Government securities [Member] | Emerging Market Government Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	13.00%	37.00%
Government securities [Member] | Emerging Market Government Securities [Member] | American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	13.00%	37.00%
Government securities [Member] | Other International Government Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	8.00%	31.00%
Government securities [Member] | Other International Government Securities [Member] | American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	8.00%	31.00%
Government securities [Member] | U.S. Buyout Opportunities [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations		94.00%
Government securities [Member] | European Buyout Opportunities [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations		6.00%
Private market partnerships [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan master trust future funding commitments	$ 1.4	$ 1
Private market partnerships [Member] | American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan master trust future funding commitments	$ 1.4	$ 1
Private market partnerships [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated period of liquidation of underlying assets	1 year	1 year
Private market partnerships [Member] | Minimum [Member] | American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated period of liquidation of underlying assets	1 year	1 year
Private market partnerships [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated period of liquidation of underlying assets	10 years	10 years
Private market partnerships [Member] | Maximum [Member] | American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated period of liquidation of underlying assets	10 years	10 years
Private market partnerships [Member] | U.S. Buyout Opportunities [Member] | American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations		94.00%
Private market partnerships [Member] | European Buyout Opportunities [Member] | American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations		6.00%
Common/collective trusts and 103-12 Investment Trust measured at net asset value [Member] | Common Or Collective Trust, Securities Of Larger Companies Within US [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	36.00%
Common/collective trusts and 103-12 Investment Trust measured at net asset value [Member] | Common Or Collective Trust, Securities Of Larger Companies Within US [Member] | American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	36.00%
Common/collective trusts and 103-12 Investment Trust measured at net asset value [Member] | Common Or Collective Trust, Securities Of Smaller Companies Outside US [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	29.00%
Common/collective trusts and 103-12 Investment Trust measured at net asset value [Member] | Common Or Collective Trust, Securities Of Smaller Companies Outside US [Member] | American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	29.00%
Common/collective trusts and 103-12 Investment Trust measured at net asset value [Member] | Common Or Collective Interest Trust, Short-Term Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	16.00%	37.00%
Common/collective trusts and 103-12 Investment Trust measured at net asset value [Member] | Common Or Collective Interest Trust, Short-Term Securities [Member] | American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	16.00%	37.00%
Common/collective trusts and 103-12 Investment Trust measured at net asset value [Member] | Emerging Market 103-12 Investment Trust [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	15.00%	45.00%
Common/collective trusts and 103-12 Investment Trust measured at net asset value [Member] | Emerging Market 103-12 Investment Trust [Member] | American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	15.00%	45.00%
Common/collective trusts and 103-12 Investment Trust measured at net asset value [Member] | Canadian Segregated Balanced Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	4.00%	12.00%
Common/collective trusts and 103-12 Investment Trust measured at net asset value [Member] | Canadian Segregated Balanced Value [Member] | American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	4.00%	12.00%
Common/collective trusts and 103-12 Investment Trust measured at net asset value [Member] | Common/Collective Trust [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations		6.00%
Common/collective trusts and 103-12 Investment Trust measured at net asset value [Member] | Common/Collective Trust [Member] | American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations		6.00%

Employee Benefit Plans - Change

Employee Benefit Plans - Changes in Fair Value Measurements of Level 3 Investments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Pension Benefits [Member]
Change in fair value measurements of level 3 investments
Fair value of plan assets at beginning of period	$ 10,053	$ 11,395
Actual loss on plan assets:
Fair value of plan assets at end of period	12,897	10,053
Pension Benefits [Member] | Level 3 [Member] | Private market partnerships [Member]
Change in fair value measurements of level 3 investments
Fair value of plan assets at beginning of period	7	14
Actual loss on plan assets:
Relating to assets still held at the reporting date		(2)
Purchases	3	1
Sales		(6)
Fair value of plan assets at end of period	10	7
Pension Benefits [Member] | Level 3 [Member] | Insurance group annuity contracts [Member]
Change in fair value measurements of level 3 investments
Fair value of plan assets at beginning of period	2	2
Actual loss on plan assets:
Relating to assets still held at the reporting date		0
Purchases	0	0
Sales		0
Fair value of plan assets at end of period	2	2
American Airlines, Inc. [Member] | Level 3 [Member] | Private market partnerships [Member]
Change in fair value measurements of level 3 investments
Fair value of plan assets at beginning of period	7	14
Actual loss on plan assets:
Relating to assets still held at the reporting date		(2)
Purchases	3	1
Sales		(6)
Fair value of plan assets at end of period	10	7
American Airlines, Inc. [Member] | Level 3 [Member] | Insurance group annuity contracts [Member]
Change in fair value measurements of level 3 investments
Fair value of plan assets at beginning of period	2	2
Actual loss on plan assets:
Relating to assets still held at the reporting date		0
Purchases	0	0
Sales		0
Fair value of plan assets at end of period	2	2
American Airlines, Inc. [Member] | Pension Benefits [Member]
Change in fair value measurements of level 3 investments
Fair value of plan assets at beginning of period	10,001	11,340
Actual loss on plan assets:
Fair value of plan assets at end of period	$ 12,829	$ 10,001

Employee Benefit Plans - Fair V

Employee Benefit Plans - Fair Values of Retiree Medical and Other Postretirement Benefit Plans Assets by Asset Category (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Mutual funds [Member] | Non-U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	27.00%	25.00%
Retiree Medical And Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 204	$ 225	$ 295
Retiree Medical And Other Postretirement Benefits [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4	4
Retiree Medical And Other Postretirement Benefits [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	200	221
Retiree Medical And Other Postretirement Benefits [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Retiree Medical And Other Postretirement Benefits [Member] | Money market funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4	4
Retiree Medical And Other Postretirement Benefits [Member] | Money market funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4	4
Retiree Medical And Other Postretirement Benefits [Member] | Money market funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Retiree Medical And Other Postretirement Benefits [Member] | Money market funds [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Retiree Medical And Other Postretirement Benefits [Member] | Mutual funds - AAL Class [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	200	221
Retiree Medical And Other Postretirement Benefits [Member] | Mutual funds - AAL Class [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Retiree Medical And Other Postretirement Benefits [Member] | Mutual funds - AAL Class [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	200	221
Retiree Medical And Other Postretirement Benefits [Member] | Mutual funds - AAL Class [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 0	$ 0
Retiree Medical And Other Postretirement Benefits [Member] | Mutual funds [Member] | Non-U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	24.00%	30.00%
American Airlines, Inc. [Member] | Mutual funds [Member] | Non-U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocations	24.00%	30.00%
American Airlines, Inc. [Member] | Retiree Medical And Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 204	$ 225	$ 295
American Airlines, Inc. [Member] | Retiree Medical And Other Postretirement Benefits [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4	4
American Airlines, Inc. [Member] | Retiree Medical And Other Postretirement Benefits [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	200	221
American Airlines, Inc. [Member] | Retiree Medical And Other Postretirement Benefits [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
American Airlines, Inc. [Member] | Retiree Medical And Other Postretirement Benefits [Member] | Money market funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4	4
American Airlines, Inc. [Member] | Retiree Medical And Other Postretirement Benefits [Member] | Money market funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4	4
American Airlines, Inc. [Member] | Retiree Medical And Other Postretirement Benefits [Member] | Money market funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
American Airlines, Inc. [Member] | Retiree Medical And Other Postretirement Benefits [Member] | Money market funds [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
American Airlines, Inc. [Member] | Retiree Medical And Other Postretirement Benefits [Member] | Mutual funds - AAL Class [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	200	221
American Airlines, Inc. [Member] | Retiree Medical And Other Postretirement Benefits [Member] | Mutual funds - AAL Class [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
American Airlines, Inc. [Member] | Retiree Medical And Other Postretirement Benefits [Member] | Mutual funds - AAL Class [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	200	221
American Airlines, Inc. [Member] | Retiree Medical And Other Postretirement Benefits [Member] | Mutual funds - AAL Class [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 0	$ 0

Employee Benefit Plans - Define

Employee Benefit Plans - Defined Contribution and Multiemployer Plans (Details) - USD ($) $ in Millions	Jun. 14, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Mar. 29, 2019
Defined Contribution Plan Disclosure [Line Items]
Contributions to defined contribution benefit plans		$ 860	$ 846	$ 820
American Airlines, Inc. [Member]
Defined Contribution Plan Disclosure [Line Items]
Contributions to defined contribution benefit plans		836	825	813
Pension Plan [Member] | International Association of Machinists & Aerospace Workers (IAM) National Pension Fund [Member]
Defined Contribution Plan Disclosure [Line Items]
Contributions to multiemployer plan by company		32	31	31
Contributions to multiemployer plan by all employers			$ 467
Contributions to multiemployer plan by company, percentage of total contributions to plan (more than)			5.00%
Multiemployer plan, funded status percentage (over)					80.00%
Rehabilitation plan, percentage increase in company annual contributions	2.50%
Pension Plan [Member] | International Association of Machinists & Aerospace Workers (IAM) National Pension Fund [Member] | American Airlines, Inc. [Member]
Defined Contribution Plan Disclosure [Line Items]
Contributions to multiemployer plan by company		$ 32	$ 31	$ 31
Contributions to multiemployer plan by all employers			$ 467
Contributions to multiemployer plan by company, percentage of total contributions to plan (more than)			5.00%
Multiemployer plan, funded status percentage (over)					80.00%
Rehabilitation plan, percentage increase in company annual contributions	2.50%

Employee Benefit Plans - Profit

Employee Benefit Plans - Profit Sharing Program (Details) - Deferred Profit Sharing [Member] $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Pre-tax income excluding special items for employee profit sharing, percentage	5.00%
Employee profit sharing program, amount	$ 213
American Airlines, Inc. [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Pre-tax income excluding special items for employee profit sharing, percentage	5.00%
Employee profit sharing program, amount	$ 213

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (AOCI) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
AOCI tax, attributable to parent [Roll Forward]
Beginning balance, tax	$ (1,218)	$ (1,252)
Other comprehensive income (loss) before reclassifications, tax	107	15
Amounts reclassified from AOCI, tax	20	19
Net current-period other comprehensive income (loss), tax	127	34
Ending balance, tax	(1,091)	(1,218)	$ (1,252)
AOCI attributable to parent, net of tax [Roll Forward]
Beginning balance, net of tax	(5,896)	(5,776)
Other comprehensive income (loss) before reclassifications, net of tax	(366)	(51)
Amounts reclassified from AOCI, net of tax	(69)	(69)
Total other comprehensive loss, net of tax	(435)	(120)	(71)
Ending balance, net of tax	(6,331)	(5,896)	(5,776)
Pension, Retiree Medical and Other Postretirement Benefits [Member]
AOCI attributable to parent, before tax [Roll Forward]
Beginning balance, before tax	(4,673)	(4,523)
Other comprehensive income (loss) before reclassifications, before tax	(476)	(62)
Amounts reclassified from AOCI, before tax	(89)	(88)
Net current-period other comprehensive income (loss), before tax	(565)	(150)
Ending balance, before tax	(5,238)	(4,673)	(4,523)
Unrealized Gain/(Loss) on Investments [Member]
AOCI attributable to parent, before tax [Roll Forward]
Beginning balance, before tax	(5)	(1)
Other comprehensive income (loss) before reclassifications, before tax	3	(4)
Amounts reclassified from AOCI, before tax	0	0
Net current-period other comprehensive income (loss), before tax	3	(4)
Ending balance, before tax	(2)	(5)	(1)
American Airlines, Inc. [Member]
AOCI tax, attributable to parent [Roll Forward]
Beginning balance, tax	(1,329)	(1,364)
Other comprehensive income (loss) before reclassifications, tax	106	15
Amounts reclassified from AOCI, tax	20	20
Net current-period other comprehensive income (loss), tax	126	35
Ending balance, tax	(1,203)	(1,329)	(1,364)
AOCI attributable to parent, net of tax [Roll Forward]
Beginning balance, net of tax	(5,992)	(5,873)
Other comprehensive income (loss) before reclassifications, net of tax	(362)	(50)
Amounts reclassified from AOCI, net of tax	(69)	(69)
Total other comprehensive loss, net of tax	(431)	(119)	(69)
Ending balance, net of tax	(6,423)	(5,992)	(5,873)
American Airlines, Inc. [Member] | Pension, Retiree Medical and Other Postretirement Benefits [Member]
AOCI attributable to parent, before tax [Roll Forward]
Beginning balance, before tax	(4,658)	(4,508)
Other comprehensive income (loss) before reclassifications, before tax	(471)	(61)
Amounts reclassified from AOCI, before tax	(89)	(89)
Net current-period other comprehensive income (loss), before tax	(560)	(150)
Ending balance, before tax	(5,218)	(4,658)	(4,508)
American Airlines, Inc. [Member] | Unrealized Gain/(Loss) on Investments [Member]
AOCI attributable to parent, before tax [Roll Forward]
Beginning balance, before tax	(5)	(1)
Other comprehensive income (loss) before reclassifications, before tax	3	(4)
Amounts reclassified from AOCI, before tax	0	0
Net current-period other comprehensive income (loss), before tax	3	(4)
Ending balance, before tax	$ (2)	$ (5)	$ (1)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Loss - Reclassifications out of AOCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period, net of tax	$ (69)	$ (69)
Prior Service Benefit [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period, net of tax	(162)	(161)
Actuarial Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period, net of tax	93	92
American Airlines, Inc. [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period, net of tax	(69)	(69)
American Airlines, Inc. [Member] | Prior Service Benefit [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period, net of tax	(162)	(161)
American Airlines, Inc. [Member] | Actuarial Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period, net of tax	$ 93	$ 92

Commitments, Contingencies an_3

Commitments, Contingencies and Guarantees - Aircraft, Engine and Other Purchase Commitments (Details) $ in Millions	Dec. 31, 2019USD ($)Aircraft	Dec. 31, 2018USD ($)
Purchase Obligations
Equipment purchase deposits	$ 1,674	$ 1,278
Number of aircraft ordered, not delivered | Aircraft	76
Number of aircraft ordered, not delivered, to be financed under sale-leaseback financing | Aircraft	22
Jet Fuel, Facility Construction Projects and Information Technology Support [Member]
Unrecorded Unconditional Purchase Obligations
2020	$ 3,500
2021	3,500
2022	1,300
2023	130
2024	81
Aircraft and Engine Purchase Commitments [Member]
Purchase Obligations
2020	1,629
2021	750
2022	1,599
2023	1,543
2024	2,574
2025 and Thereafter	4,855
Total	12,950
American Airlines, Inc. [Member]
Purchase Obligations
Equipment purchase deposits	$ 1,674	$ 1,277
Number of aircraft ordered, not delivered | Aircraft	76
Number of aircraft ordered, not delivered, to be financed under sale-leaseback financing | Aircraft	22
American Airlines, Inc. [Member] | Jet Fuel, Facility Construction Projects and Information Technology Support [Member]
Unrecorded Unconditional Purchase Obligations
2020	$ 3,500
2021	3,500
2022	1,300
2023	130
2024	81
2025 and thereafter	77
American Airlines, Inc. [Member] | Aircraft and Engine Purchase Commitments [Member]
Purchase Obligations
2020	1,629
2021	750
2022	1,599
2023	1,543
2024	2,574
2025 and Thereafter	4,855
Total	$ 12,950

Commitments, Contingencies an_4

Commitments, Contingencies and Guarantees - Capacity Purchase Agreements (Details) - American Airlines, Inc. [Member] - Airline Capacity Purchase Arrangements [Member] $ in Millions	Dec. 31, 2019USD ($)
Unrecorded Unconditional Purchase Obligation [Line Items]
Capacity purchase agreement, percentage of reimbursement for certain variable costs	100.00%
2020	$ 1,115
2021	1,185
2022	1,126
2023	1,077
2024	1,077
2025 and Thereafter	3,402
Total	$ 8,982

Commitments, Contingencies an_5

Commitments, Contingencies and Guarantees - Additional Information (Details) shares in Millions	Jun. 15, 2018USD ($)	Jun. 30, 2015lawsuit	Dec. 31, 2019USD ($)EmployeesAircraftaircraft_enginesecurity_screening_laneshares	May 31, 2019	Dec. 31, 2018USD ($)
Long-term Purchase Commitment [Line Items]
Airport development, amount			$ 1,600,000,000
Airport redevelopment, number of security screening lanes | security_screening_lane			16
Airport redevelopment, costs incurred and capitalized			$ 98,000,000
Number of aircraft owned through financing under EETCs | Aircraft			382
Number of aircraft leased through financing under EETCs | Aircraft			69
Number of spare aircraft engines owned through financing under EETCs | aircraft_engine			79
Long-term debt			$ 23,856,000,000		$ 24,001,000,000
Operating lease liabilities			9,129,000,000		9,556,000,000
Letters of credit outstanding and surety bonds, amount			$ 572,000,000
Shares reserved for issuance in Disputed Claims Reserve (in shares) | shares			7
Number of putative class action lawsuits | lawsuit		100
Settlement amount	$ 45,000,000
Number of full-time equivalent employees | Employees			133,700
Percentage of employees covered by collective bargaining agreements with various labor unions			85.00%
Percentage of employees covered by collective bargaining agreements that will become amendable within one year			22.00%
Regional Carrier [Member]
Long-term Purchase Commitment [Line Items]
Number of full-time equivalent employees | Employees			29,500
EETC Leveraged Lease Financings [Member]
Long-term Purchase Commitment [Line Items]
Operating lease liabilities			$ 177,000,000
Special Facility Revenue Bonds [Member]
Long-term Purchase Commitment [Line Items]
Operating lease liabilities			321,000,000
Guarantor obligations, maximum exposure, undiscounted			589,000,000
Secured Debt [Member]
Long-term Purchase Commitment [Line Items]
Long-term debt			22,606,000,000		22,751,000,000
Unsecured Debt [Member]
Long-term Purchase Commitment [Line Items]
Long-term debt			1,250,000,000		1,250,000,000
Enhanced Equipment Trust Certificates (EETC) [Member] | Secured Debt [Member]
Long-term Purchase Commitment [Line Items]
Long-term debt			11,933,000,000		11,648,000,000
Special Facility Revenue Bonds [Member] | Secured Debt [Member]
Long-term Purchase Commitment [Line Items]
Long-term debt			754,000,000		798,000,000
Guarantor obligations, maximum exposure, undiscounted			725,000,000
Credit Facilities And Certain EETC Financings [Member] | Secured Debt [Member]
Long-term Purchase Commitment [Line Items]
Guarantor obligations, maximum exposure, undiscounted			8,100,000,000
Senior Notes 4.625% Due in 2020 [Member] | Unsecured Debt [Member]
Long-term Purchase Commitment [Line Items]
Long-term debt			$ 500,000,000		500,000,000
Fixed interest rate per annum			4.625%
Senior Notes 5.000% Due 2022 [Member] | Unsecured Debt [Member]
Long-term Purchase Commitment [Line Items]
Long-term debt			$ 750,000,000		0
Fixed interest rate per annum			5.00%	5.00%
American Airlines, Inc. [Member]
Long-term Purchase Commitment [Line Items]
Airport development, amount			$ 1,600,000,000
Airport redevelopment, number of security screening lanes | security_screening_lane			16
Airport redevelopment, costs incurred and capitalized			$ 98,000,000
Number of aircraft owned through financing under EETCs | Aircraft			382
Number of aircraft leased through financing under EETCs | Aircraft			69
Number of spare aircraft engines owned through financing under EETCs | aircraft_engine			79
Long-term debt			$ 22,577,000,000
Operating lease liabilities			$ 9,083,000,000		9,496,000,000
Number of putative class action lawsuits | lawsuit		100
Settlement amount	$ 45,000,000
Number of full-time equivalent employees | Employees			104,200
Percentage of employees covered by collective bargaining agreements with various labor unions			84.00%
Percentage of employees covered by collective bargaining agreements that will become amendable within one year			25.00%
American Airlines, Inc. [Member] | EETC Leveraged Lease Financings [Member]
Long-term Purchase Commitment [Line Items]
Operating lease liabilities			$ 177,000,000
American Airlines, Inc. [Member] | Secured Debt [Member]
Long-term Purchase Commitment [Line Items]
Long-term debt			22,577,000,000		22,722,000,000
American Airlines, Inc. [Member] | Enhanced Equipment Trust Certificates (EETC) [Member] | Secured Debt [Member]
Long-term Purchase Commitment [Line Items]
Long-term debt			11,933,000,000		11,648,000,000
American Airlines, Inc. [Member] | Special Facility Revenue Bonds [Member] | Secured Debt [Member]
Long-term Purchase Commitment [Line Items]
Long-term debt			$ 725,000,000		$ 769,000,000
Fixed interest rate per annum			5.00%
American Airlines, Inc. [Member] | Senior Notes 4.625% Due in 2020 [Member] | Unsecured Debt [Member]
Long-term Purchase Commitment [Line Items]
Guarantor obligations, maximum exposure, undiscounted			$ 500,000,000
American Airlines, Inc. [Member] | Senior Notes 5.000% Due 2022 [Member] | Unsecured Debt [Member]
Long-term Purchase Commitment [Line Items]
Guarantor obligations, maximum exposure, undiscounted			$ 750,000,000

Supplemental Cash Flow Inform_3

Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Non-cash investing and financing activities:
Settlement of bankruptcy obligations	$ 7	$ 0	$ 15
Equity Investment	0	0	120
Supplemental information:
Interest paid, net	1,111	1,091	1,040
Income taxes paid	8	18	20
American Airlines, Inc. [Member]
Non-cash investing and financing activities:
Settlement of bankruptcy obligations	7	0	15
Equity Investment	0	0	120
Supplemental information:
Interest paid, net	1,025	1,009	942
Income taxes paid	$ 8	$ 16	$ 18

Operating Segments and Relate_2

Operating Segments and Related Disclosures (Details)	12 Months Ended
	Dec. 31, 2019Segments
Segment Reporting Information [Line Items]
Number of operating segments	1
American Airlines, Inc. [Member]
Segment Reporting Information [Line Items]
Number of operating segments	1

Share Based Compensation - Addi

Share Based Compensation - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation costs	$ 95	$ 88	$ 90
Common stock withheld or sold related to tax obligations (in shares)	800,000	800,000	1,100,000
Payment of certain tax withholding obligations associated with employee equity awards	$ 25	$ 37	$ 51
AAG Incentive Award Plan 2013 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for grant (in shares)				40,000,000
American Airlines, Inc. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation costs	$ 95	$ 88	$ 90
Common stock withheld or sold related to tax obligations (in shares)	800,000	800,000	1,100,000
Payment of certain tax withholding obligations associated with employee equity awards	$ 25	$ 37	$ 51
American Airlines, Inc. [Member] | AAG Incentive Award Plan 2013 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for grant (in shares)				40,000,000

Share Based Compensation - Rest

Share Based Compensation - Restricted Stock Unit Awards (Details) - Restricted Stock Units (RSUs) [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Number of Shares [Roll Forward]
Number of Shares, Beginning Balance (in shares)	4,320	4,324	5,187
Number of Shares, Granted (in shares)	3,206	2,194	2,309
Number of Shares, Vested and released (in shares)	(2,002)	(1,999)	(2,708)
Number of Shares, Forfeited (in shares)	(337)	(199)	(464)
Number of Shares, Ending balance (in shares)	5,187	4,320	4,324
Weighted Average Grant Date Fair Value [Abstract]
Weighted Average Grant Date Fair Value, Beginning Balance (in dollars per share)	$ 44.29	$ 46.94	$ 41.48
Weighted Average Grant Date Fair Value, Granted (in dollars per share)	34	47.65	48.58
Weighted Average Grant Date Fair Value, Vested and released (in dollars per share)	44.90	44.99	39.63
Weighted Average Grant Date Fair Value, Forfeited (in dollars per share)	42.55	45.72	44.48
Weighted Average Grant Date Fair Value, Ending balance (in dollars per share)	$ 37.01	$ 44.29	$ 46.94
Unrecognized compensation cost	$ 108
Recognition period	1 year
Total fair value of stock-settled during the year	$ 68	$ 91	$ 123
American Airlines, Inc. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Number of Shares [Roll Forward]
Number of Shares, Beginning Balance (in shares)	4,320	4,324	5,187
Number of Shares, Granted (in shares)	3,206	2,194	2,309
Number of Shares, Vested and released (in shares)	(2,002)	(1,999)	(2,708)
Number of Shares, Forfeited (in shares)	(337)	(199)	(464)
Number of Shares, Ending balance (in shares)	5,187	4,320	4,324
Weighted Average Grant Date Fair Value [Abstract]
Weighted Average Grant Date Fair Value, Beginning Balance (in dollars per share)	$ 44.29	$ 46.94	$ 41.48
Weighted Average Grant Date Fair Value, Granted (in dollars per share)	34	47.65	48.58
Weighted Average Grant Date Fair Value, Vested and released (in dollars per share)	44.90	44.99	39.63
Weighted Average Grant Date Fair Value, Forfeited (in dollars per share)	42.55	45.72	44.48
Weighted Average Grant Date Fair Value, Ending balance (in dollars per share)	$ 37.01	$ 44.29	$ 46.94
Unrecognized compensation cost	$ 108
Recognition period	1 year
Total fair value of stock-settled during the year	$ 68	$ 91	$ 123

Valuation and Qualifying Acco_3

Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allowance for obsolescence of spare parts [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 814	$ 769	$ 765
Additions Charged to Statement of Operations Accounts	91	70	29
Deductions	(121)	(25)	(25)
Balance at End of Year	784	814	769
Allowance for uncollectible accounts [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	29	24	36
Additions Charged to Statement of Operations Accounts	19	42	43
Deductions	(17)	(37)	(55)
Balance at End of Year	31	29	24
American Airlines, Inc. [Member] | Allowance for obsolescence of spare parts [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	754	717	720
Additions Charged to Statement of Operations Accounts	79	57	18
Deductions	(104)	(20)	(21)
Balance at End of Year	729	754	717
American Airlines, Inc. [Member] | Allowance for uncollectible accounts [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	24	21	35
Additions Charged to Statement of Operations Accounts	17	39	41
Deductions	(16)	(36)	(55)
Balance at End of Year	$ 25	$ 24	$ 21

Quarterly Financial Data - Summ

Quarterly Financial Data - Summarized Financial Data (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Selected Quarterly Financial Information [Line Items]
Operating revenues	$ 11,313	$ 11,911	$ 11,960	$ 10,584	$ 10,938	$ 11,559	$ 11,643	$ 10,401	$ 45,768	$ 44,541	$ 42,622
Operating expenses	10,584	11,103	10,807	10,209	10,367	10,874	10,639	10,005	42,703	41,885	38,391
Operating income	729	808	1,153	375	571	685	1,004	396	3,065	2,656	4,231
Net income	$ 414	$ 425	$ 662	$ 185	$ 325	$ 372	$ 556	$ 159	$ 1,686	$ 1,412	$ 1,282
Earnings per share:
Basic (in dollars per share)	$ 0.95	$ 0.96	$ 1.49	$ 0.41	$ 0.71	$ 0.81	$ 1.20	$ 0.34	$ 3.80	$ 3.04	$ 2.62
Diluted (in dollars per share)	$ 0.95	$ 0.96	$ 1.49	$ 0.41	$ 0.70	$ 0.81	$ 1.20	$ 0.34	$ 3.79	$ 3.03	$ 2.61
Shares used for computation:
Basic (in shares)	434,578	441,915	445,008	451,951	460,589	460,526	463,533	472,297	443,363	464,236	489,164
Diluted (in shares)	435,659	442,401	445,587	453,429	461,915	461,507	464,618	474,598	444,269	465,660	491,692
American Airlines, Inc. [Member]
Selected Quarterly Financial Information [Line Items]
Operating revenues	$ 11,312	$ 11,910	$ 11,958	$ 10,581	$ 10,936	$ 11,556	$ 11,640	$ 10,398	$ 45,761	$ 44,530	$ 42,610
Operating expenses	10,565	11,082	10,831	10,236	10,344	10,850	10,626	9,986	42,714	41,807	38,405
Operating income	747	828	1,127	345	592	706	1,014	412	3,047	2,723	4,205
Net income	$ 520	$ 508	$ 714	$ 230	$ 407	$ 433	$ 609	$ 209	$ 1,972	$ 1,658	$ 1,285

Quarterly Financial Data - Addi

Quarterly Financial Data - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Operating and nonoperating special items, net	$ 108	$ 195
Fleet restructuring expenses	39	94	$ 271	$ 422	$ 232
Merger integration expenses	85	81	191	268	273
Severance costs		37	11	58	0
Mark-to-market net unrealized gains (losses) on equity investments	42	(22)	5	(104)	0
Net credit (charge) resulting from mark-to-market adjustments for bankruptcy obligations		(37)	(11)	(76)	27
American Airlines, Inc. [Member]
Restructuring Cost and Reserve [Line Items]
Operating and nonoperating special items, net	108	190
Fleet restructuring expenses	39	94	271	422	232
Merger integration expenses	85	81	191	268	273
Severance costs		37	11	58	0
Mark-to-market net unrealized gains (losses) on equity investments	$ 42	(22)	5	(104)	0
Net credit (charge) resulting from mark-to-market adjustments for bankruptcy obligations		$ 37	$ (11)	$ (76)	$ 27

Transactions with Related Par_3

Transactions with Related Parties - Net Receivables (Payables) to Related Parties (Details) - American Airlines, Inc. [Member] - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Related Party Transaction [Line Items]
Net receivables (payables) to related parties	$ 12,451	$ 10,666
AAG [Member]
Related Party Transaction [Line Items]
Net receivables (payables) to related parties	14,597	12,808
AAG's Wholly-owned Subsidiaries [Member]
Related Party Transaction [Line Items]
Net receivables (payables) to related parties	$ (2,146)	$ (2,142)

Transactions with Related Par_4

Transactions with Related Parties - Additional Information (Details) - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
American Airlines, Inc. [Member] | Regional Carrier [Member] | AAG's Wholly-owned Subsidiaries [Member] | Airline Capacity Purchase Arrangements [Member]
Related Party Transaction [Line Items]
Related party transaction, expense recognized	$ 2.2	$ 1.8	$ 1.7

Subsequent Event (Details)

Subsequent Event (Details) - USD ($)

1 Months Ended

3 Months Ended

12 Months Ended

Jan. 31, 2020

Dec. 31, 2019

Sep. 30, 2019

Jun. 30, 2019

Mar. 31, 2019

Dec. 31, 2018

Sep. 30, 2018

Jun. 30, 2018

Mar. 31, 2018

Dec. 31, 2017

Sep. 30, 2017

Jun. 30, 2017

Mar. 31, 2017

Dec. 31, 2019

Dec. 31, 2018

Dec. 31, 2017

Nov. 30, 2019

Oct. 31, 2019

Subsequent Event [Line Items]

Dividends declared on common stock (in dollars per share)

$ 0.10

$ 0.1

$ 0.1

$ 0.1

$ 0.1

$ 0.1

$ 0.1

$ 0.1

$ 0.1

$ 0.1

$ 0.1

$ 0.1

$ 0.40

$ 0.40

$ 0.40

Subsequent Event [Member]

Subsequent Event [Line Items]

Dividends declared on common stock (in dollars per share)

$ 0.10

Revolving Credit Facility [Member]

Subsequent Event [Line Items]

Line of credit facility, maximum borrowing capacity

$ 3,243,000,000

$ 3,243,000,000

2014 Credit Facilities [Member] | Revolving Credit Facility [Member]

Subsequent Event [Line Items]

Line of credit facility, maximum borrowing capacity

1,643,000,000

1,643,000,000

2014 Credit Facilities [Member] | Secured Debt [Member] | Revolving Credit Facility [Member]

Subsequent Event [Line Items]

Line of credit facility, maximum borrowing capacity

1,643,000,000

$ 1,643,000,000

$ 1,600,000,000

$ 1,500,000,000

2014 Credit Facilities [Member] | Secured Debt [Member] | LIBOR [Member] | Revolving Credit Facility [Member]

Subsequent Event [Line Items]

Basis spread on variable rate

2.00%

2014 Credit Facilities [Member] | Secured Debt [Member] | LIBOR [Member] | Revolving Credit Facility [Member] | Subsequent Event [Member]

Subsequent Event [Line Items]

Line of credit facility, maximum borrowing capacity

$ 1,220,000,000

Basis spread on variable rate

1.75%

Floor interest rate

0.00%

2014 Credit Facilities [Member] | Secured Debt [Member] | Base Rate [Member] | Revolving Credit Facility [Member]

Subsequent Event [Line Items]

Basis spread on variable rate

1.00%

2014 Credit Facilities [Member] | Secured Debt [Member] | Base Rate [Member] | Revolving Credit Facility [Member] | Subsequent Event [Member]

Subsequent Event [Line Items]

Basis spread on variable rate

0.75%

American Airlines, Inc. [Member] | Revolving Credit Facility [Member]

Subsequent Event [Line Items]

Line of credit facility, maximum borrowing capacity

3,243,000,000

$ 3,243,000,000

American Airlines, Inc. [Member] | 2014 Credit Facilities [Member] | Revolving Credit Facility [Member]

Subsequent Event [Line Items]

Line of credit facility, maximum borrowing capacity

1,643,000,000

1,643,000,000

American Airlines, Inc. [Member] | 2014 Credit Facilities [Member] | Secured Debt [Member] | Revolving Credit Facility [Member]

Subsequent Event [Line Items]

Line of credit facility, maximum borrowing capacity

$ 1,600,000,000

$ 1,500,000,000

American Airlines, Inc. [Member] | 2014 Credit Facilities [Member] | Secured Debt [Member] | LIBOR [Member] | Revolving Credit Facility [Member]

Subsequent Event [Line Items]

Line of credit facility, maximum borrowing capacity

$ 1,643,000,000

$ 1,643,000,000

Basis spread on variable rate

2.00%

American Airlines, Inc. [Member] | 2014 Credit Facilities [Member] | Secured Debt [Member] | LIBOR [Member] | Revolving Credit Facility [Member] | Subsequent Event [Member]

Subsequent Event [Line Items]

Line of credit facility, maximum borrowing capacity

$ 1,220,000,000

Basis spread on variable rate

1.75%

Floor interest rate

0.00%

American Airlines, Inc. [Member] | 2014 Credit Facilities [Member] | Secured Debt [Member] | Base Rate [Member] | Revolving Credit Facility [Member]

Subsequent Event [Line Items]

Basis spread on variable rate

1.00%

American Airlines, Inc. [Member] | 2014 Credit Facilities [Member] | Secured Debt [Member] | Base Rate [Member] | Revolving Credit Facility [Member] | Subsequent Event [Member]

Subsequent Event [Line Items]

Basis spread on variable rate

0.75%

Uncategorized Items - a10k12311

Label	Element	Value
Accounting Standards Update 2016-01 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 60,000,000
Accounting Standards Update 2016-01 [Member] | Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	60,000,000
Accounting Standards Update 2016-01 [Member] | Subsidiaries [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	60,000,000
Accounting Standards Update 2016-01 [Member] | Subsidiaries [Member] | Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 60,000,000