American Airlines (AAL) 10-Q 26 Apr 18 2018 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2018	Apr. 20, 2018
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Trading Symbol	AAL
Entity Registrant Name	American Airlines Group Inc.
Entity Central Index Key	6,201
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		468,152,649
American Airlines, Inc. [Member]
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Entity Registrant Name	AMERICAN AIRLINES INC
Entity Central Index Key	4,515
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		1,000

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating revenues:
Passenger	$ 9,480	$ 8,997
Cargo	227	191
Other	694	632
Total operating revenues	10,401	9,820
Operating expenses:
Aircraft fuel and related taxes	1,763	1,402
Salaries, wages and benefits	3,017	2,859
Regional expenses	1,698	1,573
Maintenance, materials and repairs	469	492
Other rent and landing fees	462	440
Aircraft rent	304	295
Selling expenses	356	318
Depreciation and amortization	445	405
Special items, net	195	119
Other	1,261	1,180
Total operating expenses	9,970	9,083
Operating income	431	737
Nonoperating income (expense):
Interest income	25	21
Interest expense, net	(265)	(257)
Other income, net	82	34
Total nonoperating expense, net	(158)	(202)
Income before income taxes	273	535
Income tax provision	87	195
Net income	$ 186	$ 340
Earnings per common share:
Basic (in dollars per share)	$ 0.39	$ 0.67
Diluted (in dollars per share)	$ 0.39	$ 0.67
Weighted average shares outstanding (in thousands):
Basic (in shares)	472,297	503,902
Diluted (in shares)	474,598	507,797
Cash dividends declared per common share (in dollars per share)	$ 0.1	$ 0.1
American Airlines, Inc. [Member]
Operating revenues:
Passenger	$ 9,480	$ 8,997
Cargo	227	191
Other	691	629
Total operating revenues	10,398	9,817
Operating expenses:
Aircraft fuel and related taxes	1,763	1,402
Salaries, wages and benefits	3,014	2,857
Regional expenses	1,682	1,569
Maintenance, materials and repairs	469	492
Other rent and landing fees	462	440
Aircraft rent	304	295
Selling expenses	356	318
Depreciation and amortization	445	405
Special items, net	195	119
Other	1,261	1,180
Total operating expenses	9,951	9,077
Operating income	447	740
Nonoperating income (expense):
Interest income	73	49
Interest expense, net	(253)	(241)
Other income, net	82	33
Total nonoperating expense, net	(98)	(159)
Income before income taxes	349	581
Income tax provision	113	212
Net income	$ 236	$ 369

Condensed Consolidated Stateme3

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Net income	$ 186	$ 340
Other comprehensive loss, net of tax:
Pension, retiree medical and other postretirement benefits	(16)	(14)
Investments	(2)	0
Total other comprehensive loss, net of tax	(18)	(14)
Total comprehensive income	168	326
American Airlines, Inc. [Member]
Net income	236	369
Other comprehensive loss, net of tax:
Pension, retiree medical and other postretirement benefits	(16)	(14)
Investments	(2)	0
Total other comprehensive loss, net of tax	(18)	(14)
Total comprehensive income	$ 218	$ 355

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Current assets
Cash	$ 297	$ 295
Short-term investments	4,994	4,771
Restricted cash and short-term investments	294	318
Accounts receivable, net	1,809	1,752
Aircraft fuel, spare parts and supplies, net	1,455	1,359
Prepaid expenses and other	824	651
Total current assets	9,673	9,146
Operating property and equipment
Flight equipment	40,662	40,318
Ground property and equipment	8,599	8,267
Equipment purchase deposits	1,231	1,217
Total property and equipment, at cost	50,492	49,802
Less accumulated depreciation and amortization	(16,159)	(15,646)
Total property and equipment, net	34,333	34,156
Other assets
Goodwill	4,091	4,091
Intangibles, net of accumulated amortization of $632 and $622, respectively	2,193	2,203
Deferred tax asset	1,581	1,816
Other assets	1,409	1,373
Total other assets	9,274	9,483
Total assets	53,280	52,785
Current liabilities
Current maturities of long-term debt and capital leases	2,793	2,554
Accounts payable	1,953	1,688
Accrued salaries and wages	1,178	1,672
Air traffic liability	5,549	4,042
Loyalty program liability	3,176	3,121
Other accrued liabilities	2,359	2,281
Total current liabilities	17,008	15,358
Noncurrent liabilities
Long-term debt and capital leases, net of current maturities	21,946	22,511
Pension and postretirement benefits	7,259	7,497
Loyalty program liability	5,610	5,701
Other liabilities	2,475	2,498
Total noncurrent liabilities	37,290	38,207
Commitments and contingencies
Stockholders’ equity (deficit)
Common stock	5	5
Additional paid-in capital	5,279	5,714
Accumulated other comprehensive loss	(5,172)	(5,154)
Accumulated deficit	(1,130)	(1,345)
Total stockholders’ deficit	(1,018)	(780)
Total liabilities and stockholders’ equity (deficit)	53,280	52,785
American Airlines, Inc. [Member]
Current assets
Cash	283	287
Short-term investments	4,984	4,768
Restricted cash and short-term investments	294	318
Accounts receivable, net	1,865	1,755
Receivables from related parties, net	9,405	8,822
Aircraft fuel, spare parts and supplies, net	1,387	1,294
Prepaid expenses and other	820	647
Total current assets	19,038	17,891
Operating property and equipment
Flight equipment	40,340	39,993
Ground property and equipment	8,329	8,006
Equipment purchase deposits	1,230	1,217
Total property and equipment, at cost	49,899	49,216
Less accumulated depreciation and amortization	(15,860)	(15,354)
Total property and equipment, net	34,039	33,862
Other assets
Goodwill	4,091	4,091
Intangibles, net of accumulated amortization of $632 and $622, respectively	2,193	2,203
Deferred tax asset	1,757	2,071
Other assets	1,309	1,283
Total other assets	9,350	9,648
Total assets	62,427	61,401
Current liabilities
Current maturities of long-term debt and capital leases	2,297	2,058
Accounts payable	1,884	1,625
Accrued salaries and wages	1,126	1,613
Air traffic liability	5,549	4,042
Loyalty program liability	3,176	3,121
Other accrued liabilities	2,266	2,209
Total current liabilities	16,298	14,668
Noncurrent liabilities
Long-term debt and capital leases, net of current maturities	20,669	21,236
Pension and postretirement benefits	7,214	7,452
Loyalty program liability	5,610	5,701
Other liabilities	2,429	2,456
Total noncurrent liabilities	35,922	36,845
Commitments and contingencies
Stockholders’ equity (deficit)
Common stock	0	0
Additional paid-in capital	16,740	16,716
Accumulated other comprehensive loss	(5,269)	(5,251)
Accumulated deficit	(1,264)	(1,577)
Total stockholders’ deficit	10,207	9,888
Total liabilities and stockholders’ equity (deficit)	$ 62,427	$ 61,401

Condensed Consolidated Balance5

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Accumulated amortization of intangibles	$ 632	$ 622
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 issued (in shares)	467,390,481	475,507,887
Common stock, shares outstanding (in shares)	467,390,481	475,507,887
American Airlines, Inc. [Member]
Accumulated amortization of intangibles	$ 632	$ 622
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

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Net cash provided by operating activities		$ 1,799	$ 2,250
Cash flows from investing activities:
Capital expenditures and aircraft purchase deposits		(779)	(1,714)
Proceeds from sale of property and equipment and other investments		22	32
Purchases of short-term investments		(1,252)	(1,922)
Sales of short-term investments		1,029	1,660
Decrease in restricted short-term investments		24	74
Net cash used in investing activities		(956)	(1,870)
Cash flows from financing activities:
Proceeds from issuance of long-term debt		236	899
Payments on long-term debt and capital leases		(569)	(686)
Deferred financing costs		(1)	(31)
Treasury stock repurchases		(461)	(484)
Dividend payments		(48)	(51)
Other financing activities		2	4
Net cash used in financing activities		(841)	(349)
Net increase in cash and restricted cash		2	31
Cash and restricted cash at beginning of period		398	436
Cash and restricted cash at end of period	[1]	400	467
Supplemental information:
Interest paid, net		258	255
Income taxes paid		3	4
American Airlines, Inc. [Member]
Net cash provided by operating activities		1,262	1,696
Cash flows from investing activities:
Capital expenditures and aircraft purchase deposits		(762)	(1,695)
Proceeds from sale of property and equipment and other investments		19	31
Purchases of short-term investments		(1,244)	(1,920)
Sales of short-term investments		1,029	1,660
Decrease in restricted short-term investments		24	74
Net cash used in investing activities		(934)	(1,850)
Cash flows from financing activities:
Proceeds from issuance of long-term debt		236	899
Payments on long-term debt and capital leases		(569)	(686)
Deferred financing costs		(1)	(31)
Other financing activities		2	4
Net cash used in financing activities		(332)	186
Net increase in cash and restricted cash		(4)	32
Cash and restricted cash at beginning of period		390	424
Cash and restricted cash at end of period	[2]	386	456
Supplemental information:
Interest paid, net		246	243
Income taxes paid		$ 3	$ 4
[1]	The following table provides a reconciliation of cash and restricted cash to amounts reported within the condensed consolidated balance sheets:Cash$297 $374Restricted cash included in restricted cash and short-term investments103 93Total cash and restricted cash$400 $467
[2]	The following table provides a reconciliation of cash and restricted cash to amounts reported within the condensed consolidated balance sheets:Cash$283 $363Restricted cash included in restricted cash and short-term investments103 93Total cash and restricted cash$386 $456

Condensed Consolidated Stateme7

Condensed Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2018		Dec. 31, 2017	Mar. 31, 2017		Dec. 31, 2016
Cash	$ 297		$ 295	$ 374
Restricted cash included in restricted cash and short-term investments	103			93
Total cash and restricted cash	400	[1]	398	467	[1]	$ 436
American Airlines, Inc. [Member]
Cash	283		287	363
Restricted cash included in restricted cash and short-term investments	103			93
Total cash and restricted cash	$ 386	[2]	$ 390	$ 456	[2]	$ 424
[1]	The following table provides a reconciliation of cash and restricted cash to amounts reported within the condensed consolidated balance sheets:Cash$297 $374Restricted cash included in restricted cash and short-term investments103 93Total cash and restricted cash$400 $467
[2]	The following table provides a reconciliation of cash and restricted cash to amounts reported within the condensed consolidated balance sheets:Cash$283 $363Restricted cash included in restricted cash and short-term investments103 93Total cash and restricted cash$386 $456

Basis of Presentation and Recen

Basis of Presentation and Recent Accounting Pronouncements	3 Months Ended
	Mar. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Basis of Presentation and Recent Accounting Pronouncements	Basis of Presentation and Recent Accounting Pronouncements (a) Basis of Presentation The accompanying unaudited condensed consolidated financial statements of American Airlines Group Inc. (we, us, our and similar terms, or AAG) should be read in conjunction with the consolidated financial statements contained in our Annual Report on Form 10-K for the year ended December 31, 2017 . The accompanying unaudited condensed consolidated financial statements include the accounts of AAG and its wholly-owned subsidiaries. AAG’s principal subsidiary is American Airlines, Inc. (American). All significant intercompany transactions have been eliminated. 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. On December 30, 2015, in order to simplify AAG’s internal corporate structure, US Airways Group merged with and into AAG, with AAG as the surviving corporation. Immediately thereafter, US Airways, Inc. (US Airways), a wholly-owned subsidiary of US Airways Group, merged with and into American, with American as the surviving corporation. Management believes that all adjustments necessary for the fair presentation of results, consisting of normally recurring items, have been included in the unaudited condensed consolidated financial statements for the interim periods presented. 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, valuation allowance for deferred tax assets, as well as pension and retiree medical and other postretirement benefits. (b) Recent Accounting Pronouncements Standards Effective for 2018 Reporting Periods Effective January 1, 2018, we adopted the accounting pronouncements described below. ASU 2014-09: Revenue from Contracts with Customers (Topic 606) (the New Revenue Standard) The New Revenue Standard applies to all companies that enter into contracts with customers to transfer goods or services. We adopted the New Revenue Standard using the full retrospective method, which resulted in the recast of prior reporting periods. The adoption of the New Revenue Standard impacted our accounting for outstanding mileage credits earned through travel by AAdvantage loyalty program members. There was no change in accounting for sales of mileage credits to co-branded card or other partners. Prior to the adoption of the New Revenue Standard, we used the incremental cost method to account for the portion of our loyalty program liability related to mileage credits earned through travel, which were valued based on the estimated incremental cost of carrying one additional passenger. The New Revenue Standard required us to change our policy to the deferred revenue method and apply a relative selling price approach whereby a portion of each passenger ticket sale attributable to mileage credits earned is deferred and recognized in passenger revenue upon future mileage redemption. The value of the earned mileage credits is materially greater under the deferred revenue method than the value attributed to these mileage credits under the incremental cost method. The New Revenue Standard also required certain reclassifications, principally the reclassification of certain ancillary revenues previously classified and reported as other revenue to passenger revenue and as applicable to cargo revenue. Additionally, the New Revenue Standard required a gross presentation on the face of our condensed consolidated statement of operations for certain revenues and expenses that had previously been presented on a net basis. See recast condensed consolidated statement of operations data for the three months ended March 31, 2017 and recast consolidated balance sheet data as of December 31, 2017 presented below for the effects of adoption. ASU 2017-07: Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost (the New Retirement Standard) The New Retirement Standard required all components of our net periodic benefit cost (income), with the exception of service cost, previously reported within operating expenses as salaries, wages and benefits, to be reclassified and reported within nonoperating income (expense). The New Retirement Standard was applied retrospectively, which resulted in the recast of each prior reporting period presented. The adoption of the New Retirement Standard had no impact on pre-tax income or net income reported. See recast condensed consolidated statement of operations data for the three months ended March 31, 2017 presented below for the effects of adoption. ASU 2016-01: Financial Instruments - Overall (Subtopic 825-10) This ASU made several modifications to Subtopic 825-10, including the elimination of the available-for-sale classification of equity investments, and it required equity investments with readily determinable fair values to be measured at fair value with changes in fair value recognized in net income. This standard was adopted prospectively as of January 1, 2018 and resulted in a $77 million cumulative effect adjustment credit to retained earnings related to our investment in China Southern Airlines Company Limited, which was previously accounted for under the cost method. ASU 2016-18: Statement of Cash Flows (Topic 230): Restricted Cash This ASU required that the change in total cash, cash at beginning of period and cash at end of period on the statement of cash flows include restricted cash and restricted cash equivalents and also requires companies who report cash and restricted cash separately on the balance sheet to reconcile those amounts to the statement of cash flows. This standard was applied retrospectively, which resulted in the recast of the prior reporting period in the statement of cash flows. For the three months ended March 31, 2018 and 2017, $103 million and $93 million , respectively, of restricted cash is included in the total of cash and restricted cash balance at the end of period. A reconciliation of cash and restricted cash from our condensed consolidated statement of cash flows to the amounts reported within our condensed consolidated balance sheet is also included in a table below our condensed consolidated statement of cash flows . Impacts to Prior Period Results The effects of adoption of the New Revenue Standard and New Retirement Standard to our condensed consolidated statement of operations for the three months ended March 31, 2017 were as follows (in millions, except per share amounts): New Revenue Standard New Retirement Standard As Reported Deferred Revenue Method Reclassifications Reclassifications As Recast Operating revenues: Passenger $ 8,155 $ 170 $ 672 $ — $ 8,997 Cargo 172 — 19 — 191 Other 1,297 — (665 ) — 632 Total operating revenues 9,624 170 26 — 9,820 Total operating expenses 9,023 — 26 34 9,083 Operating income 601 170 — (34 ) 737 Total nonoperating expense, net (236 ) — — 34 (202 ) Income before income taxes 365 170 — — 535 Income tax provision 131 64 — — 195 Net income $ 234 $ 106 $ — $ — $ 340 Diluted earnings per common share $ 0.46 $ 0.67 The effects of adoption of the New Revenue Standard to our December 31, 2017 consolidated balance sheet are as follows (in millions): As Reported New Revenue Standard As Recast Deferred tax asset $ 427 $ 1,389 $ 1,816 Air traffic liability 3,978 64 4,042 Current loyalty program liability 2,791 330 3,121 Noncurrent loyalty program liability — 5,701 5,701 Total stockholders' equity (deficit) 3,926 (4,706 ) (780 ) Standards Effective for 2019 Reporting Periods 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 asset on the balance sheet and aligns many of the underlying principles of the new lessor model with those in the New Revenue Standard. 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. We will adopt the New Lease Standard effective January 1, 2019. We are currently evaluating how the adoption of the New Lease Standard will impact our consolidated financial statements. Interpretations are on-going and could have a material impact on our implementation. Currently, we expect that the adoption of the New Lease Standard will have a material impact on our consolidated balance sheet due to the recognition of right-of-use assets and lease liabilities principally for certain leases currently accounted for as operating leases. ASU 2018-02: Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income This ASU provides financial statement preparers with an 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 previously enacted 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, and early adoption is permitted. We expect we will adopt this standard effective January 1, 2019. The adoption of the standard may impact tax amounts stranded in accumulated other comprehensive income related to our pension and retiree medical and other postretirement benefit plans.
American Airlines, Inc. [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Basis of Presentation and Recent Accounting Pronouncements	Basis of Presentation and Recent Accounting Pronouncements (a) Basis of Presentation The accompanying unaudited condensed consolidated financial statements of American Airlines, Inc. (American) should be read in conjunction with the consolidated financial statements contained in American’s Annual Report on Form 10-K for the year ended December 31, 2017 . American is the principal wholly-owned subsidiary of American Airlines Group Inc. (AAG). All significant intercompany transactions have been eliminated. 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. On December 30, 2015, in order to simplify AAG’s internal corporate structure, US Airways Group merged with and into AAG, with AAG as the surviving corporation. Immediately thereafter, US Airways, Inc. (US Airways), a wholly-owned subsidiary of US Airways Group, merged with and into American, with American as the surviving corporation. Management believes that all adjustments necessary for the fair presentation of results, consisting of normally recurring items, have been included in the unaudited condensed consolidated financial statements for the interim periods presented. 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, valuation allowance for deferred tax assets, as well as pension and retiree medical and other postretirement benefits. (b) Recent Accounting Pronouncements Standards Effective for 2018 Reporting Periods Effective January 1, 2018, American adopted the accounting pronouncements described below. ASU 2014-09: Revenue from Contracts with Customers (Topic 606) (the New Revenue Standard) The New Revenue Standard applies to all companies that enter into contracts with customers to transfer goods or services. American adopted the New Revenue Standard using the full retrospective method, which resulted in the recast of prior reporting periods. The adoption of the New Revenue Standard impacted American’s accounting for outstanding mileage credits earned through travel by AAdvantage loyalty program members. There was no change in accounting for sales of mileage credits to co-branded card or other partners. Prior to the adoption of the New Revenue Standard, American used the incremental cost method to account for the portion of its loyalty program liability related to mileage credits earned through travel, which were valued based on the estimated incremental cost of carrying one additional passenger. The New Revenue Standard required American to change its policy to the deferred revenue method and apply a relative selling price approach whereby a portion of each passenger ticket sale attributable to mileage credits earned is deferred and recognized in passenger revenue upon future mileage redemption. The value of the earned mileage credits is materially greater under the deferred revenue method than the value attributed to these mileage credits under the incremental cost method. The New Revenue Standard also required certain reclassifications, principally the reclassification of certain ancillary revenues previously classified and reported as other revenue to passenger revenue and as applicable to cargo revenue. Additionally, the New Revenue Standard required a gross presentation on the face of American’s condensed consolidated statement of operations for certain revenues and expenses that had previously been presented on a net basis. See recast condensed consolidated statement of operations data for the three months ended March 31, 2017 and recast consolidated balance sheet data as of December 31, 2017 presented below for the effects of adoption. ASU 2017-07: Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost (the New Retirement Standard) The New Retirement Standard required all components of American’s net periodic benefit cost (income), with the exception of service cost, previously reported within operating expenses as salaries, wages and benefits, to be reclassified and reported within nonoperating income (expense). The New Retirement Standard was applied retrospectively, which resulted in the recast of each prior reporting period presented. The adoption of the New Retirement Standard had no impact on pre-tax income or net income reported. See recast condensed consolidated statement of operations data for the three months ended March 31, 2017 presented below for the effects of adoption. ASU 2016-01: Financial Instruments - Overall (Subtopic 825-10) This ASU made several modifications to Subtopic 825-10, including the elimination of the available-for-sale classification of equity investments, and it required equity investments with readily determinable fair values to be measured at fair value with changes in fair value recognized in net income. This standard was adopted prospectively as of January 1, 2018 and resulted in a $77 million cumulative effect adjustment credit to retained earnings related to American's investment in China Southern Airlines Company Limited, which was previously accounted for under the cost method. ASU 2016-18: Statement of Cash Flows (Topic 230): Restricted Cash This ASU required that the change in total cash, cash at beginning of period and cash at end of period on the statement of cash flows include restricted cash and restricted cash equivalents and also requires companies who report cash and restricted cash separately on the balance sheet to reconcile those amounts to the statement of cash flows. This standard was applied retrospectively, which resulted in the recast of the prior reporting period in the statement of cash flows. For the three months ended March 31, 2018 and 2017, $103 million and $93 million , respectively, of restricted cash is included in the total of cash and restricted cash balance at the end of period. A reconciliation of cash and restricted cash from American's condensed consolidated statement of cash flows to the amounts reported within its condensed consolidated balance sheet is also included in a table below its condensed consolidated statement of cash flows . Impacts to Prior Period Results The effects of adoption of the New Revenue Standard and New Retirement Standard to American’s condensed consolidated statement of operations for the three months ended March 31, 2017 were as follows (in millions): New Revenue Standard New Retirement Standard As Reported Deferred Revenue Method Reclassifications Reclassifications As Recast Operating revenues: Passenger $ 8,155 $ 170 $ 672 $ — $ 8,997 Cargo 172 — 19 — 191 Other 1,294 — (665 ) — 629 Total operating revenues 9,621 170 26 — 9,817 Total operating expenses 9,017 — 26 34 9,077 Operating income 604 170 — (34 ) 740 Total nonoperating expense, net (193 ) — — 34 (159 ) Income before income taxes 411 170 — — 581 Income tax provision 148 64 — — 212 Net income $ 263 $ 106 $ — $ — $ 369 The effects of adoption of the New Revenue Standard to American’s December 31, 2017 consolidated balance sheet are as follows (in millions): As Reported New Revenue Standard As Recast Deferred tax asset $ 682 $ 1,389 $ 2,071 Air traffic liability 3,978 64 4,042 Current loyalty program liability 2,791 330 3,121 Noncurrent loyalty program liability — 5,701 5,701 Total stockholder’s equity (deficit) 14,594 (4,706 ) 9,888 Standards Effective for 2019 Reporting Periods 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 asset on the balance sheet and aligns many of the underlying principles of the new lessor model with those in the New Revenue Standard. 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. American will adopt the New Lease Standard effective January 1, 2019. American is currently evaluating how the adoption of the New Lease Standard will impact its consolidated financial statements. Interpretations are on-going and could have a material impact on its implementation. Currently, American expects that the adoption of the New Lease Standard will have a material impact on its consolidated balance sheet due to the recognition of right-of-use assets and lease liabilities principally for certain leases currently accounted for as operating leases. ASU 2018-02: Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income This ASU provides financial statement preparers with an 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 previously enacted 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, and early adoption is permitted. American expects it will adopt this standard effective January 1, 2019. The adoption of the standard may impact tax amounts stranded in accumulated other comprehensive income related to American's pension and retiree medical and other postretirement benefit plans.

Special Items, Net

Special Items, Net	3 Months Ended
	Mar. 31, 2018
Restructuring Cost and Reserve [Line Items]
Special Items, Net	Special Items, Net Special items, net on the condensed consolidated statements of operations consisted of the following (in millions): Three Months Ended March 31, 2018 2017 Fleet restructuring expenses (1) $ 82 $ 63 Merger integration expenses (2) 59 63 Labor contract expenses 13 — Other operating charges, net 41 (7 ) Mainline operating special items, net 195 119 Regional operating special items, net — 2 Debt refinancing and extinguishment charges — 5 Nonoperating special items, net — 5 Income tax special items, net (3) 22 — (1) Fleet restructuring expenses principally included the acceleration of depreciation and impairments for aircraft and related equipment grounded or expected to be grounded earlier than planned. (2) Merger integration expenses included costs associated with our remaining integration projects, principally our flight attendant, human resources, payroll and technical operations integrations. (3) Income tax special items included a $22 million charge to income tax expense to establish a required valuation allowance related to our estimated refund for Alternative Minimum Tax (AMT) credits.
American Airlines, Inc. [Member]
Restructuring Cost and Reserve [Line Items]
Special Items, Net	Special Items, Net Special items, net on the condensed consolidated statements of operations consisted of the following (in millions): Three Months Ended March 31, 2018 2017 Fleet restructuring expenses (1) $ 82 $ 63 Merger integration expenses (2) 59 63 Labor contract expenses 13 — Other operating charges, net 41 (7 ) Mainline operating special items, net 195 119 Regional operating special items, net — 2 Debt refinancing and extinguishment charges — 5 Nonoperating special items, net — 5 Income tax special items, net (3) 30 — (1) Fleet restructuring expenses principally included the acceleration of depreciation and impairments for aircraft and related equipment grounded or expected to be grounded earlier than planned. (2) Merger integration expenses included costs associated with American's remaining integration projects, principally its flight attendant, human resources, payroll and technical operations integrations. (3) Income tax special items included a $30 million charge to income tax expense to establish a required valuation allowance related to American's estimated refund for Alternative Minimum Tax (AMT) credits.

Earnings Per Common Share

Earnings Per Common Share	3 Months Ended
	Mar. 31, 2018
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): Three Months Ended March 31, 2018 2017 Basic EPS: Net income $ 186 $ 340 Weighted average common shares outstanding (in thousands) 472,297 503,902 Basic EPS $ 0.39 $ 0.67 Diluted EPS: Net income for purposes of computing diluted EPS $ 186 $ 340 Share computation for diluted EPS (in thousands): Basic weighted average common shares outstanding 472,297 503,902 Dilutive effect of stock awards 2,301 3,895 Diluted weighted average common shares outstanding 474,598 507,797 Diluted EPS $ 0.39 $ 0.67 Restricted stock unit awards excluded from the calculation of diluted EPS because inclusion would be antidilutive (in thousands) 1 395

Share Repurchase Programs and D

Share Repurchase Programs and Dividends	3 Months Ended
	Mar. 31, 2018
Equity [Abstract]
Share Repurchase Programs and Dividends	Share Repurchase Programs and Dividends Since July 2014, our Board of Directors has approved six share repurchase programs aggregating $11.0 billion of authority. As of March 31, 2018 , there was no remaining authority to repurchase shares under our share repurchase programs. During the three months ended March 31, 2018 , we repurchased 8.4 million shares of AAG common stock for $450 million at a weighted average cost per share of $53.32 . Since the inception of our share repurchase programs in July 2014, we have repurchased 270.7 million shares of AAG common stock for $11.0 billion at a weighted average cost per share of $40.63 . Our Board of Directors declared a cash dividend of $0.10 per share for stockholders of record as of February 6, 2018 and paid on February 20, 2018 , totaling $48 million in the first three months of 2018 .

Revenue Recognition

Revenue Recognition	3 Months Ended
	Mar. 31, 2018
Entity Information [Line Items]
Revenue Recognition	Revenue Recognition (a) Revenue Effective January 1, 2018, we adopted the New Revenue Standard using the full retrospective method, which resulted in the recast of prior reporting periods. See Recent Accounting Pronouncements in Note 1(b) above for effects of adoption on our condensed consolidated statement of operations for the three months ended March 31, 2017 and on our consolidated balance sheet as of December 31, 2017 . Under the New Revenue Standard, revenue is recognized upon transfer of control of promised products or services to our customers in an amount that reflects the consideration we expect to receive in exchange for those products or services . The following are the significant categories comprising our reported operating revenues (in millions): Three Months Ended March 31, 2018 2017 Passenger revenue: Passenger travel $ 8,630 $ 8,195 Loyalty revenue - travel (1) 850 802 Total passenger revenue 9,480 8,997 Cargo 227 191 Other: Loyalty revenue - marketing services 570 514 Other revenue 124 118 Total other revenue 694 632 Total operating revenues $ 10,401 $ 9,820 (1) Loyalty revenue included in passenger revenue is principally comprised of mileage credit redemptions for air travel awards from mileage credits earned through travel and mileage credits sold to co-branded card and other partners. See discussion of Loyalty Revenue below. The following is our total passenger revenue by geographic region (in millions): Three Months Ended March 31, 2018 2017 Domestic $ 6,963 $ 6,781 Latin America 1,445 1,231 Atlantic 669 624 Pacific 403 361 Total passenger revenue $ 9,480 $ 8,997 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 the condensed consolidated balance sheets. The air traffic liability principally represents tickets sold for future travel dates and estimated future refunds and exchanges of tickets sold for past travel dates. 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 forfeited 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 condensed 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 Barclays US co-branded cards, 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 in accordance with the New Revenue Standard. 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 cards and other partners We sell mileage credits to participating airline partners and non-airline business partners including our co-branded card partners, under contracts with terms extending generally for one to nine years. Sales of mileage credits to non-airline business partners are comprised of two components, transportation and marketing. We allocate the consideration received from the sale of mileage credits based on the relative selling price of each product or service delivered. Our most significant partner agreements are our co-branded card program agreements with Citi and Barclays US that we entered into in 2016. We identified the following revenue elements in these co-branded 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 card and other partners and other marketing related payments. For the three months ended March 31, 2018 and 2017, loyalty revenue included in other revenue was $570 million and $514 million , respectively. 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. (b) 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 condensed consolidated balance sheet and (2) ticket sales for transportation that has not yet been provided, reported as air traffic liability on our condensed consolidated balance sheet. March 31, 2018 December 31, 2017 (In millions) Loyalty program liability $ 8,786 $ 8,822 Air traffic liability 5,549 4,042 Total $ 14,335 $ 12,864 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 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, 2017 $ 8,822 Deferral of revenue 865 Recognition of revenue (1) (901 ) Balance at March 31, 2018 (2) $ 8,786 (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 March 31, 2018 , our current loyalty program liability was $3.2 billion and represents our current estimate of revenue expected to be recognized in the next twelve 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 dates and estimated future refunds and exchanges of tickets sold for past travel dates. 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 dates will be recognized within twelve months. For the three months ended March 31, 2018 , $2.1 billion of revenue was recognized in passenger revenue that was included in our air traffic liability at December 31, 2017 . With respect to contract receivables, reflected as accounts receivable, net on the accompanying condensed consolidated balance sheet, 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.
American Airlines, Inc. [Member]
Entity Information [Line Items]
Revenue Recognition	Revenue Recognition (a) Revenue Effective January 1, 2018, American adopted the New Revenue Standard using the full retrospective method, which resulted in the recast of prior reporting periods. See Recent Accounting Pronouncements in Note 1(b) above for effects of adoption on American's condensed consolidated statement of operations for the three months ended March 31, 2017 and on American's consolidated balance sheet as of December 31, 2017 . Under the New Revenue Standard, revenue is recognized upon transfer of control of promised products or services to American's customers in an amount that reflects the consideration it expects to receive in exchange for those products or services . The following are the significant categories comprising American's reported operating revenues (in millions): Three Months Ended March 31, 2018 2017 Passenger revenue: Passenger travel $ 8,630 $ 8,195 Loyalty revenue - travel (1) 850 802 Total passenger revenue 9,480 8,997 Cargo 227 191 Other: Loyalty revenue - marketing services 570 514 Other revenue 121 115 Total other revenue 691 629 Total operating revenues $ 10,398 $ 9,817 (1) Loyalty revenue included in passenger revenue is principally comprised of mileage credit redemptions for air travel awards from mileage credits earned through travel and mileage credits sold to co-branded card and other partners. See discussion of Loyalty Revenue below. The following is American's total passenger revenue by geographic region (in millions): Three Months Ended March 31, 2018 2017 Domestic $ 6,963 $ 6,781 Latin America 1,445 1,231 Atlantic 669 624 Pacific 403 361 Total passenger revenue $ 9,480 $ 8,997 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 the condensed consolidated balance sheets. The air traffic liability principally represents tickets sold for future travel dates and estimated future refunds and exchanges of tickets sold for past travel dates. 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 forfeited 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 condensed 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 Barclays US co-branded cards, 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 in accordance with the New Revenue Standard. 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 cards and other partners American sells mileage credits to participating airline partners and non-airline business partners including American's co-branded card partners, under contracts with terms extending generally for one to nine years. Sales of mileage credits to non-airline business partners are comprised of two components, transportation and marketing. American allocates the consideration received from the sale 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 card program agreements with Citi and Barclays US that American entered into in 2016. American identified the following revenue elements in these co-branded 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 card and other partners and other marketing related payments. For the three months ended March 31, 2018 and 2017, loyalty revenue included in other revenue was $570 million and $514 million , respectively. 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. (b) 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 condensed consolidated balance sheet and (2) ticket sales for transportation that has not yet been provided, reported as air traffic liability on American's condensed consolidated balance sheet. March 31, 2018 December 31, 2017 (In millions) Loyalty program liability $ 8,786 $ 8,822 Air traffic liability 5,549 4,042 Total $ 14,335 $ 12,864 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 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, 2017 $ 8,822 Deferral of revenue 865 Recognition of revenue (1) (901 ) Balance at March 31, 2018 (2) $ 8,786 (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 March 31, 2018 , 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 twelve 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 dates and estimated future refunds and exchanges of tickets sold for past travel dates. 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 dates will be recognized within twelve months. For the three months ended March 31, 2018 , $2.1 billion of revenue was recognized in passenger revenue that was included in American's air traffic liability at December 31, 2017 . With respect to contract receivables, reflected as accounts receivable, net on the accompanying condensed consolidated balance sheet, 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.

Debt

Debt	3 Months Ended
	Mar. 31, 2018
Debt Instrument [Line Items]
Debt	Debt Long-term debt and capital lease obligations included in the condensed consolidated balance sheets consisted of (in millions): March 31, 2018 December 31, 2017 Secured 2013 Credit Facilities, variable interest rate of 3.88%, installments through 2020 $ 1,825 $ 1,825 2014 Credit Facilities, variable interest rate of 3.74%, installments through 2021 728 728 April 2016 Credit Facilities, variable interest rate of 3.88%, installments through 2023 990 990 December 2016 Credit Facilities, variable interest rate of 3.78%, installments through 2023 1,238 1,238 Aircraft enhanced equipment trust certificates (EETCs), fixed interest rates ranging from 3.00% to 9.75%, averaging 4.25%, maturing from 2018 to 2029 11,764 11,881 Equipment loans and other notes payable, fixed and variable interest rates ranging from 2.34% to 8.48%, averaging 3.70%, maturing from 2018 to 2029 5,062 5,259 Special facility revenue bonds, fixed interest rates ranging from 5.00% to 8.00%, maturing from 2018 to 2035 857 857 Other secured obligations, fixed interest rates ranging from 3.81% to 12.24%, maturing from 2021 to 2028 755 773 23,219 23,551 Unsecured 5.50% senior notes, interest only payments until due in 2019 750 750 6.125% senior notes, interest only payments until due in 2018 500 500 4.625% senior notes, interest only payments until due in 2020 500 500 1,750 1,750 Total long-term debt and capital lease obligations 24,969 25,301 Less: Total unamortized debt discount, premium and issuance costs 230 236 Less: Current maturities 2,793 2,554 Long-term debt and capital lease obligations, net of current maturities $ 21,946 $ 22,511 The table below shows the maximum availability under revolving credit facilities, all of which were undrawn, as of March 31, 2018 (in millions): 2013 Revolving Facility $ 1,200 2014 Revolving Facility 1,000 April 2016 Revolving Facility 300 Total $ 2,500 The December 2016 Credit Facilities provide for a revolving credit facility that may be established in the future. 2018 Aircraft Financing Activities 2017-2 EETCs During the first quarter of 2018 , $210 million of the $1.0 billion total net proceeds from the issuance of certain enhanced equipment trust certificates in August and October 2017 (the 2017-2 EETCs) were used to purchase equipment notes issued by American in connection with financing 4 of the 30 aircraft financed under the 2017-2 EETCs. Approximately $735 million of proceeds from the 2017-2 EETCs were used in 2017 to purchase equipment notes issued by American in connection with the financing of 24 aircraft. Interest and principal payments on equipment notes issued in connection with the 2017-2 EETCs are payable semi-annually in April and October of each year, with interest payments beginning in April 2018 and principal payments beginning in October 2018. These equipment notes are secured by liens on the aircraft financed with the proceeds of the 2017-2 EETCs. The remaining net proceeds of $73 million of 2017-2 EETCs is being held in escrow for the benefit of the holders of the 2017-2 EETCs until such time as American issues additional Series AA, A and B equipment notes to the pass-through trusts, which will purchase 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 depository are not American's assets. Certain information regarding the 2017-2 EETC equipment notes and the remaining escrowed proceeds of the 2017-2 EETCs , as of March 31, 2018 , is set forth in the table below. 2017-2 EETCs Series AA Series A Series B Aggregate principal issued $545 million $252 million $221 million Remaining escrowed proceeds $39 million $18 million $16 million Fixed interest rate per annum 3.35% 3.60% 3.70% Maturity date October 2029 October 2029 October 2025
American Airlines, Inc. [Member]
Debt Instrument [Line Items]
Debt	Debt Long-term debt and capital lease obligations included in the condensed consolidated balance sheets consisted of (in millions): March 31, 2018 December 31, 2017 Secured 2013 Credit Facilities, variable interest rate of 3.88%, installments through 2020 $ 1,825 $ 1,825 2014 Credit Facilities, variable interest rate of 3.74%, installments through 2021 728 728 April 2016 Credit Facilities, variable interest rate of 3.88%, installments through 2023 990 990 December 2016 Credit Facilities, variable interest rate of 3.78%, installments through 2023 1,238 1,238 Aircraft enhanced equipment trust certificates (EETCs), fixed interest rates ranging from 3.00% to 9.75%, averaging 4.25%, maturing from 2018 to 2029 11,764 11,881 Equipment loans and other notes payable, fixed and variable interest rates ranging from 2.34% to 8.48%, averaging 3.70%, maturing from 2018 to 2029 5,062 5,259 Special facility revenue bonds, fixed interest rates ranging from 5.00% to 5.50%, maturing from 2018 to 2035 828 828 Other secured obligations, fixed interest rates ranging from 3.81% to 12.24%, maturing from 2021 to 2028 754 772 Total long-term debt and capital lease obligations 23,189 23,521 Less: Total unamortized debt discount, premium and issuance costs 223 227 Less: Current maturities 2,297 2,058 Long-term debt and capital lease obligations, net of current maturities $ 20,669 $ 21,236 The table below shows the maximum availability under revolving credit facilities, all of which were undrawn, as of March 31, 2018 (in millions): 2013 Revolving Facility $ 1,200 2014 Revolving Facility 1,000 April 2016 Revolving Facility 300 Total $ 2,500 The December 2016 Credit Facilities provide for a revolving credit facility that may be established in the future. 2018 Aircraft Financing Activities 2017-2 EETCs During the first quarter of 2018 , $210 million of the $1.0 billion total net proceeds from the issuance of certain enhanced equipment trust certificates in August and October 2017 (the 2017-2 EETCs) were used to purchase equipment notes issued by American in connection with financing 4 of the 30 aircraft financed under the 2017-2 EETCs. Approximately $735 million of proceeds from the 2017-2 EETCs were used in 2017 to purchase equipment notes issued by American in connection with the financing of 24 aircraft. Interest and principal payments on equipment notes issued in connection with the 2017-2 EETCs are payable semi-annually in April and October of each year, with interest payments beginning in April 2018 and principal payments beginning in October 2018. These equipment notes are secured by liens on the aircraft financed with the proceeds of the 2017-2 EETCs. The remaining net proceeds of $73 million of 2017-2 EETCs is being held in escrow for the benefit of the holders of the 2017-2 EETCs until such time as American issues additional Series AA, A and B equipment notes to the pass-through trusts, which will purchase 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 depository are not American's assets. Certain information regarding the 2017-2 EETC equipment notes and the remaining escrowed proceeds of the 2017-2 EETCs, as of March 31, 2018 , is set forth in the table below. 2017-2 EETCs Series AA Series A Series B Aggregate principal issued $545 million $252 million $221 million Remaining escrowed proceeds $39 million $18 million $16 million Fixed interest rate per annum 3.35% 3.60% 3.70% Maturity date October 2029 October 2029 October 2025

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2018
Income Taxes [Line Items]
Income Taxes	Income Taxes At December 31, 2017 , we had approximately $10.0 billion of federal net operating losses (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 2018 . The federal NOL Carryforwards will expire beginning in 2022 if unused. We also had approximately $3.4 billion of NOL Carryforwards to reduce future state taxable income at December 31, 2017 , which will expire in years 2018 through 2037 if unused. At December 31, 2017 , we had an AMT credit carryforward of approximately $339 million available for federal income tax purposes, which is expected to be substantially refunded in 2019 and 2020 as a result of the repeal of corporate AMT. During the three months ended March 31, 2018 , we recorded an income tax provision of $87 million , which was substantially non-cash as we utilized our NOLs described above. This provision included a $22 million special income tax charge to establish a required valuation allowance related to our estimated refund for AMT credits, which is now subject to a sequestration reduction rate of approximately 6.6%. Substantially all of our income before income taxes is attributable to the United States. The 2017 Tax Act was enacted on December 22, 2017. The 2017 Tax Act is the most comprehensive tax change in more than 30 years . As of March 31, 2018 , we have not completed our evaluation of the 2017 Tax Act; however, to the extent possible, we have made a reasonable estimate of its effects, including the impact of lower corporate income tax rates (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. The 2017 Tax Act is unclear in many respects and could be subject to potential amendments and technical corrections, as well as interpretations and implementation regulations by the Treasury and Internal Revenue Service. In addition, it is unclear how these U.S. federal income tax changes will affect state and local taxation, which often uses federal taxable income as a starting point for computing state and local tax liabilities. Accordingly, we have not yet been able to make a reasonable estimate of the impact of certain items and continue to account for those items based on the tax laws in effect prior to the 2017 Tax Act. As further interpretations, clarifications and amendments to the 2017 Tax Act are made, our future financial statements could be materially impacted.
American Airlines, Inc. [Member]
Income Taxes [Line Items]
Income Taxes	Income Taxes At December 31, 2017 , American had approximately $10.6 billion of federal net operating losses (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 2018 . 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 $10.0 billion , substantially all of which is expected to be available for use in 2018 . The federal NOL Carryforwards will expire beginning in 2022 if unused. American also had approximately $3.2 billion of NOL Carryforwards to reduce future state taxable income at December 31, 2017 , which will expire in years 2018 through 2037 if unused. At December 31, 2017 , American had an AMT credit carryforward of approximately $452 million available for federal income tax purposes. During the three months ended March 31, 2018 , American recorded an income tax provision of $113 million , which was substantially non-cash as American utilized the NOLs described above. This provision included a $30 million special income tax charge to establish a required valuation allowance related to American's estimated refund for AMT credits, which is now subject to a sequestration reduction rate of approximately 6.6%. Substantially all of American’s income before income taxes is attributable to the United States. The 2017 Tax Act was enacted on December 22, 2017. The 2017 Tax Act is the most comprehensive tax change in more than 30 years. As of March 31, 2018 , American has not completed its evaluation of the 2017 Tax Act; however, to the extent possible, American has made a reasonable estimate of its effects, including the impact of lower corporate income tax rates (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. The 2017 Tax Act is unclear in many respects and could be subject to potential amendments and technical corrections, as well as interpretations and implementation regulations by the Treasury and Internal Revenue Service. In addition, it is unclear how these U.S. federal income tax changes will affect state and local taxation, which often uses federal taxable income as a starting point for computing state and local tax liabilities. Accordingly, American has not yet been able to make a reasonable estimate of the impact of certain items and continues to account for those items based on the tax laws in effect prior to the 2017 Tax Act. As further interpretations, clarifications and amendments to the 2017 Tax Act are made, American's future financial statements could be materially impacted.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurements	Fair Value Measurements Assets Measured at Fair Value on a Recurring Basis We utilize the market approach to measure fair value for 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 three months ended March 31, 2018 . Assets measured at fair value on a recurring basis are summarized below (in millions): Fair Value Measurements as of March 31, 2018 Total Level 1 Level 2 Level 3 Short-term investments (1) (2) : Money market funds $ 14 $ 14 $ — $ — Corporate obligations 1,712 — 1,712 — Bank notes/certificates of deposit/time deposits 2,843 — 2,843 — Repurchase agreements 425 — 425 — 4,994 14 4,980 — Restricted cash and short-term investments (1) 294 164 130 — Long-term investments (3) 281 281 — — Total $ 5,569 $ 459 $ 5,110 $ — (1) Unrealized gains or 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 mature in one year or less except for $425 million of bank notes/certificates of deposit/time deposits and $145 million of corporate obligations. (3) Long-term investments primarily include our investment in China Southern Airlines Company Limited and are classified in other assets on our condensed 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): March 31, 2018 December 31, 2017 Carrying Fair Carrying Fair Long-term debt, including current maturities $ 24,739 $ 25,286 $ 25,065 $ 25,848
American Airlines, Inc. [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurements	Fair Value Measurements Assets Measured at Fair Value on a Recurring Basis American utilizes the market approach to measure fair value for 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 three months ended March 31, 2018 . Assets measured at fair value on a recurring basis are summarized below (in millions): Fair Value Measurements as of March 31, 2018 Total Level 1 Level 2 Level 3 Short-term investments (1) (2) : Money market funds $ 4 $ 4 $ — $ — Corporate obligations 1,712 — 1,712 — Bank notes/certificates of deposit/time deposits 2,843 — 2,843 — Repurchase agreements 425 — 425 — 4,984 4 4,980 — Restricted cash and short-term investments (1) 294 164 130 — Long-term investments (3) 281 281 — — Total $ 5,559 $ 449 $ 5,110 $ — (1) Unrealized gains or 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 mature in one year or less except for $425 million of bank notes/certificates of deposit/time deposits and $145 million of corporate obligations. (3) Long-term investments primarily include American's investment in China Southern Airlines Company Limited and are classified in other assets on its condensed 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): March 31, 2018 December 31, 2017 Carrying Fair Carrying Fair Long-term debt, including current maturities $ 22,966 $ 23,481 $ 23,294 $ 24,029

Employee Benefit Plans

Employee Benefit Plans	3 Months Ended
	Mar. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Employee Benefit Plans	Employee Benefit Plans The following table provides the components of net periodic benefit cost (income) (in millions): Pension Benefits Retiree Medical and Other Three Months Ended March 31, 2018 2017 2018 2017 Service cost $ 1 $ 1 $ 1 $ 1 Interest cost 169 180 9 10 Expected return on assets (226 ) (197 ) (6 ) (5 ) Amortization of: Prior service cost (benefit) 7 7 (59 ) (59 ) Unrecognized net loss (gain) 36 36 (5 ) (6 ) Net periodic benefit cost (income) $ (13 ) $ 27 $ (60 ) $ (59 ) Effective November 1, 2012, substantially all of our defined benefit pension plans were frozen. The components of net periodic benefit income other than the service cost component are included in nonoperating other income, net in the condensed consolidated statements of operations. During the first three months of 2018 , we contributed $155 million to our defined benefit pension plans, including supplemental contributions of $116 million in addition to a $39 million minimum required contribution.
American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Employee Benefit Plans	Employee Benefit Plans The following table provides the components of net periodic benefit cost (income) (in millions): Pension Benefits Retiree Medical and Other Three Months Ended March 31, 2018 2017 2018 2017 Service cost $ 1 $ — $ 1 $ 1 Interest cost 168 180 9 10 Expected return on assets (225 ) (196 ) (6 ) (5 ) Amortization of: Prior service cost (benefit) 7 7 (59 ) (59 ) Unrecognized net loss (gain) 36 36 (5 ) (6 ) Net periodic benefit cost (income) $ (13 ) $ 27 $ (60 ) $ (59 ) Effective November 1, 2012, substantially all of American’s defined benefit pension plans were frozen. The components of net periodic benefit income other than the service cost component are included in nonoperating other income, net in the condensed consolidated statements of operations. During the first three months of 2018 , American contributed $155 million to its defined benefit pension plans, including supplemental contributions of $116 million in addition to a $39 million minimum required contribution.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	3 Months Ended
	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss The components of accumulated other comprehensive income (loss) (AOCI) are as follows (in millions): Pension, Retiree Unrealized Gain (Loss) on Investments Income Tax (1) Total Balance at December 31, 2017 $ (4,523 ) $ (1 ) $ (630 ) $ (5,154 ) Other comprehensive loss before reclassifications — (2 ) — (2 ) Amounts reclassified from AOCI (21 ) — 5 (2) (16 ) Net current-period other comprehensive income (loss) (21 ) (2 ) 5 (18 ) Balance at March 31, 2018 $ (4,544 ) $ (3 ) $ (625 ) $ (5,172 ) (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 the condensed consolidated statement of operations. Reclassifications out of AOCI are as follows (in millions): Amounts reclassified from AOCI Affected line items on the AOCI Components Three Months Ended March 31, 2018 2017 Amortization of pension, retiree medical and other postretirement benefits: Prior service benefit $ (40 ) $ (33 ) Nonoperating other income, net Actuarial loss 24 19 Nonoperating other income, net Total reclassifications for the period, net of tax $ (16 ) $ (14 )
American Airlines, Inc. [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss The components of accumulated other comprehensive income (loss) (AOCI) are as follows (in millions): Pension, Retiree Unrealized Gain (Loss) on Investments Income Tax (1) Total Balance at December 31, 2017 $ (4,508 ) $ (1 ) $ (742 ) $ (5,251 ) Other comprehensive loss before reclassifications — (2 ) — (2 ) Amounts reclassified from AOCI (21 ) — 5 (2) (16 ) Net current-period other comprehensive income (loss) (21 ) (2 ) 5 (18 ) Balance at March 31, 2018 $ (4,529 ) $ (3 ) $ (737 ) $ (5,269 ) (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 the condensed consolidated statement of operations. Reclassifications out of AOCI are as follows (in millions): Amounts reclassified from AOCI Affected line items on the condensed consolidated statements of operations AOCI Components Three Months Ended March 31, 2018 2017 Amortization of pension, retiree medical and other postretirement benefits: Prior service benefit $ (40 ) $ (33 ) Nonoperating other income, net Actuarial loss 24 19 Nonoperating other income, net Total reclassifications for the period, net of tax $ (16 ) $ (14 )

Regional Expenses

Regional Expenses	3 Months Ended
	Mar. 31, 2018
Regional Expenses [Line Items]
Regional Expenses	Regional Expenses Expenses associated with American Eagle operations are classified as regional expenses on the condensed consolidated statements of operations. Regional expenses consist of the following (in millions): Three Months Ended March 31, 2018 2017 Aircraft fuel and related taxes $ 398 $ 318 Salaries, wages and benefits 383 345 Capacity purchases from third-party regional carriers 354 393 Maintenance, materials and repairs 80 69 Other rent and landing fees 147 152 Aircraft rent 9 9 Selling expenses 85 80 Depreciation and amortization 82 79 Special items, net — 2 Other 160 126 Total regional expenses $ 1,698 $ 1,573
American Airlines, Inc. [Member]
Regional Expenses [Line Items]
Regional Expenses	Regional Expenses Expenses associated with American Eagle operations are classified as regional expenses on the condensed consolidated statements of operations. Regional expenses consist of the following (in millions): Three Months Ended March 31, 2018 2017 Aircraft fuel and related taxes $ 398 $ 318 Salaries, wages and benefits 82 75 Capacity purchases from third-party regional carriers 798 801 Maintenance, materials and repairs 2 1 Other rent and landing fees 141 146 Aircraft rent 7 7 Selling expenses 85 80 Depreciation and amortization 68 64 Special items, net — 2 Other 101 75 Total regional expenses $ 1,682 $ 1,569

Transactions with Related Parti

Transactions with Related Parties	3 Months Ended
	Mar. 31, 2018
American Airlines, Inc. [Member]
Entity Information [Line Items]
Transactions with Related Parties	Transactions with Related Parties The following represents the net receivables (payables) to related parties (in millions): March 31, 2018 December 31, 2017 AAG (1) $ 11,540 $ 10,968 AAG’s wholly-owned subsidiaries (2) (2,135 ) (2,146 ) Total $ 9,405 $ 8,822 (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.

Legal Proceedings

Legal Proceedings	3 Months Ended
	Mar. 31, 2018
Long-term Purchase Commitment [Line Items]
Legal Proceedings	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. As of March 31, 2018 , there were approximately 24.5 million shares of AAG common stock remaining in the Disputed Claims Reserve. As disputed claims are resolved, the claimants will 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 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. There is also pending in the Bankruptcy Court an adversary proceeding relating to an action brought by American to seek a determination that certain non-pension, postemployment benefits are not vested benefits and thus may be modified or terminated without liability to American. On April 18, 2014, the Bankruptcy Court granted American’s motion for summary judgment with respect to certain non-union employees, concluding that their benefits were not vested and could be terminated. The summary judgment motion was denied with respect to all other retirees. The Bankruptcy Court has not yet scheduled a trial on the merits concerning whether those retirees’ benefits are vested, and American cannot predict whether it will receive relief from obligations to provide benefits to any of those retirees. Our financial statements presently reflect these retirement programs without giving effect to any modification or termination of benefits that may ultimately be implemented based upon the outcome of this proceeding. DOJ Antitrust Civil Investigative Demand . In June 2015, we received a Civil Investigative Demand (CID) from the United States Department of Justice (DOJ) as part of an investigation into whether there have been illegal agreements or coordination of air passenger capacity. The CID seeks documents and other information from us, and other airlines have announced that they have received similar requests. We are cooperating fully with the DOJ investigation. Private Party Antitrust Action. Subsequent to announcement of the delivery of CIDs by the DOJ, we, along with Delta Air Lines, Inc., Southwest Airlines Co., United Airlines, Inc. and, in the case of litigation filed in Canada, Air Canada, have been named as defendants in approximately 100 putative class action lawsuits alleging unlawful agreements with respect to air passenger capacity, although Southwest has entered into a settlement with the plaintiffs that is pending approval by the court. The U.S. lawsuits have been consolidated in the Federal District Court for the District of Columbia. On October 28, 2016, the Court denied a motion by the airline defendants to dismiss all claims in the class actions. We believe these lawsuits are without merit. 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 United States Bankruptcy Court for the Southern District of New York. 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 March 26, 2018, the Court held a hearing on motions for summary judgment filed by defendants and plaintiffs. The Court has not yet issued an order. We believe this lawsuit is without merit and intend to vigorously defend against the allegations. DOJ Investigation Related to the United States Postal Service . In April 2015, the DOJ informed us of an inquiry regarding American’s 2009 and 2011 contracts with the United States Postal Service for the international transportation of mail by air. In October 2015, we received a CID from the DOJ seeking certain information relating to these contracts and the DOJ has also sought information concerning certain of the airlines that transport mail on a codeshare basis. The DOJ has indicated it is investigating potential violations of the False Claims Act or other statutes. We are cooperating fully with the DOJ with regard to its investigation. 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. See Part II, Item 1A. Risk Factors – “ We may be a party to litigation in the normal course of business or otherwise, which could affect our financial position and liquidity ” for additional discussion.
American Airlines, Inc. [Member]
Long-term Purchase Commitment [Line Items]
Legal Proceedings	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. As of March 31, 2018 , there were approximately 24.5 million shares of AAG common stock remaining in the Disputed Claims Reserve. As disputed claims are resolved, the claimants will 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 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 American but rather will be distributed to former AMR stockholders. There is also pending in the Bankruptcy Court an adversary proceeding relating to an action brought by American to seek a determination that certain non-pension, postemployment benefits are not vested benefits and thus may be modified or terminated without liability to American. On April 18, 2014, the Bankruptcy Court granted American’s motion for summary judgment with respect to certain non-union employees, concluding that their benefits were not vested and could be terminated. The summary judgment motion was denied with respect to all other retirees. The Bankruptcy Court has not yet scheduled a trial on the merits concerning whether those retirees’ benefits are vested, and American cannot predict whether it will receive relief from obligations to provide benefits to any of those retirees. American’s financial statements presently reflect these retirement programs without giving effect to any modification or termination of benefits that may ultimately be implemented based upon the outcome of this proceeding. DOJ Antitrust Civil Investigative Demand . In June 2015, American received a Civil Investigative Demand (CID) from the United States Department of Justice (DOJ) as part of an investigation into whether there have been illegal agreements or coordination of air passenger capacity. The CID seeks documents and other information from American, and other airlines have announced that they have received similar requests. American is cooperating fully with the DOJ investigation. Private Party Antitrust Action. Subsequent to announcement of the delivery of CIDs by the DOJ, American, along with Delta Air Lines, Inc., Southwest Airlines Co., United Airlines, Inc. and, in the case of litigation filed in Canada, Air Canada, have been named as defendants in approximately 100 putative class action lawsuits alleging unlawful agreements with respect to air passenger capacity, although Southwest has entered into a settlement with the plaintiffs that is pending approval by the court. The U.S. lawsuits have been consolidated in the Federal District Court for the District of Columbia. On October 28, 2016, the Court denied a motion by the airline defendants to dismiss all claims in the class actions. American believes these lawsuits are without merit. 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 United States Bankruptcy Court for the Southern District of New York. 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 March 26, 2018, the Court held a hearing on motions for summary judgment filed by defendants and plaintiffs. The Court has not yet issued an order. American believes this lawsuit is without merit and intends to vigorously defend against the allegations. DOJ Investigation Related to the United States Postal Service . In April 2015, the DOJ informed American of an inquiry regarding American’s 2009 and 2011 contracts with the United States Postal Service for the international transportation of mail by air. In October 2015, American received a CID from the DOJ seeking certain information relating to these contracts and the DOJ has also sought information concerning certain of the airlines that transport mail on a codeshare basis. The DOJ has indicated it is investigating potential violations of the False Claims Act or other statutes. American is cooperating fully with the DOJ with regard to its investigation. 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. See Part II, Item 1A. Risk Factors – “ We may be a party to litigation in the normal course of business or otherwise, which could affect our financial position and liquidity ” for additional discussion.

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2018
Subsequent Event [Line Items]
Subsequent Events	Subsequent Events Aircraft Purchase Commitments In April 2018 , American agreed with The Boeing Company (Boeing) to acquire an additional 47 Boeing 787 aircraft, consisting of 22 787-8 aircraft and 25 787-9 aircraft with deliveries scheduled to commence in 2020 and continue through 2026. American also has options to acquire an additional 14 Boeing 787 family aircraft in 2026 and 2027 plus, subject to satisfying certain conditions, options to acquire 14 more Boeing 787 family aircraft in 2027 and 2028. Boeing has committed to provide sale-leaseback financing (in the form of operating leases) for the 22 787-8 aircraft and backstop debt financing for the 25 787-9 aircraft. Additionally, American agreed with Boeing to defer the delivery of 40 737 MAX aircraft currently scheduled for delivery in 2020, 2021 and 2022. These aircraft are now scheduled to be delivered in 2025 and 2026. Also, in April 2018 , American and Airbus S.A.S. (Airbus) agreed to terminate the parties' A350 XWB purchase agreement and cancel the parties' obligations thereunder. American was scheduled to acquire 22 Airbus A350 aircraft with deliveries commencing in 2020 and continuing through 2024. Share Repurchase Program and Dividend Declaration In April 2018 , we announced that our Board of Directors authorized a new $2.0 billion share repurchase program that expires on December 31, 2020. Share repurchases under our share 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 will be made from time to time subject to market and economic conditions, applicable legal requirements and other relevant factors. Our share repurchase programs do not obligate us to repurchase any specific number of shares and may be suspended at any time at our discretion. Also, in April 2018 , we announced that our Board of Directors declared a $0.10 per share dividend for stockholders of record as of May 8, 2018 , and payable on May 22, 2018 . 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 at any time at our discretion.
American Airlines, Inc. [Member]
Subsequent Event [Line Items]
Subsequent Events	Subsequent Event Aircraft Purchase Commitments In April 2018 , American agreed with The Boeing Company (Boeing) to acquire an additional 47 Boeing 787 aircraft, consisting of 22 787-8 aircraft and 25 787-9 aircraft with deliveries scheduled to commence in 2020 and continue through 2026. American also has options to acquire an additional 14 Boeing 787 family aircraft in 2026 and 2027 plus, subject to satisfying certain conditions, options to acquire 14 more Boeing 787 family aircraft in 2027 and 2028. Boeing has committed to provide sale-leaseback financing (in the form of operating leases) for the 22 787-8 aircraft and backstop debt financing for the 25 787-9 aircraft. Additionally, American agreed with Boeing to defer the delivery of 40 737 MAX aircraft currently scheduled for delivery in 2020, 2021 and 2022. These aircraft are now scheduled to be delivered in 2025 and 2026. Also, in April 2018 , American and Airbus S.A.S. (Airbus) agreed to terminate the parties' A350 XWB purchase agreement and cancel the parties' obligations thereunder. American was scheduled to acquire 22 Airbus A350 aircraft with deliveries commencing in 2020 and continuing through 2024.

Basis of Presentation and Rec22

Basis of Presentation and Recent Accounting Pronouncements (Policies)	3 Months Ended
	Mar. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements of American Airlines Group Inc. (we, us, our and similar terms, or AAG) should be read in conjunction with the consolidated financial statements contained in our Annual Report on Form 10-K for the year ended December 31, 2017 . The accompanying unaudited condensed consolidated financial statements include the accounts of AAG and its wholly-owned subsidiaries. AAG’s principal subsidiary is American Airlines, Inc. (American). All significant intercompany transactions have been eliminated. 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. On December 30, 2015, in order to simplify AAG’s internal corporate structure, US Airways Group merged with and into AAG, with AAG as the surviving corporation. Immediately thereafter, US Airways, Inc. (US Airways), a wholly-owned subsidiary of US Airways Group, merged with and into American, with American as the surviving corporation. Management believes that all adjustments necessary for the fair presentation of results, consisting of normally recurring items, have been included in the unaudited condensed consolidated financial statements for the interim periods presented. 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, valuation allowance for deferred tax assets, as well as pension and retiree medical and other postretirement benefits.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Standards Effective for 2018 Reporting Periods Effective January 1, 2018, we adopted the accounting pronouncements described below. ASU 2014-09: Revenue from Contracts with Customers (Topic 606) (the New Revenue Standard) The New Revenue Standard applies to all companies that enter into contracts with customers to transfer goods or services. We adopted the New Revenue Standard using the full retrospective method, which resulted in the recast of prior reporting periods. The adoption of the New Revenue Standard impacted our accounting for outstanding mileage credits earned through travel by AAdvantage loyalty program members. There was no change in accounting for sales of mileage credits to co-branded card or other partners. Prior to the adoption of the New Revenue Standard, we used the incremental cost method to account for the portion of our loyalty program liability related to mileage credits earned through travel, which were valued based on the estimated incremental cost of carrying one additional passenger. The New Revenue Standard required us to change our policy to the deferred revenue method and apply a relative selling price approach whereby a portion of each passenger ticket sale attributable to mileage credits earned is deferred and recognized in passenger revenue upon future mileage redemption. The value of the earned mileage credits is materially greater under the deferred revenue method than the value attributed to these mileage credits under the incremental cost method. The New Revenue Standard also required certain reclassifications, principally the reclassification of certain ancillary revenues previously classified and reported as other revenue to passenger revenue and as applicable to cargo revenue. Additionally, the New Revenue Standard required a gross presentation on the face of our condensed consolidated statement of operations for certain revenues and expenses that had previously been presented on a net basis. See recast condensed consolidated statement of operations data for the three months ended March 31, 2017 and recast consolidated balance sheet data as of December 31, 2017 presented below for the effects of adoption. ASU 2017-07: Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost (the New Retirement Standard) The New Retirement Standard required all components of our net periodic benefit cost (income), with the exception of service cost, previously reported within operating expenses as salaries, wages and benefits, to be reclassified and reported within nonoperating income (expense). The New Retirement Standard was applied retrospectively, which resulted in the recast of each prior reporting period presented. The adoption of the New Retirement Standard had no impact on pre-tax income or net income reported. See recast condensed consolidated statement of operations data for the three months ended March 31, 2017 presented below for the effects of adoption. ASU 2016-01: Financial Instruments - Overall (Subtopic 825-10) This ASU made several modifications to Subtopic 825-10, including the elimination of the available-for-sale classification of equity investments, and it required equity investments with readily determinable fair values to be measured at fair value with changes in fair value recognized in net income. This standard was adopted prospectively as of January 1, 2018 and resulted in a $77 million cumulative effect adjustment credit to retained earnings related to our investment in China Southern Airlines Company Limited, which was previously accounted for under the cost method. ASU 2016-18: Statement of Cash Flows (Topic 230): Restricted Cash This ASU required that the change in total cash, cash at beginning of period and cash at end of period on the statement of cash flows include restricted cash and restricted cash equivalents and also requires companies who report cash and restricted cash separately on the balance sheet to reconcile those amounts to the statement of cash flows. This standard was applied retrospectively, which resulted in the recast of the prior reporting period in the statement of cash flows. For the three months ended March 31, 2018 and 2017, $103 million and $93 million , respectively, of restricted cash is included in the total of cash and restricted cash balance at the end of period. A reconciliation of cash and restricted cash from our condensed consolidated statement of cash flows to the amounts reported within our condensed consolidated balance sheet is also included in a table below our condensed consolidated statement of cash flows . Impacts to Prior Period Results The effects of adoption of the New Revenue Standard and New Retirement Standard to our condensed consolidated statement of operations for the three months ended March 31, 2017 were as follows (in millions, except per share amounts): New Revenue Standard New Retirement Standard As Reported Deferred Revenue Method Reclassifications Reclassifications As Recast Operating revenues: Passenger $ 8,155 $ 170 $ 672 $ — $ 8,997 Cargo 172 — 19 — 191 Other 1,297 — (665 ) — 632 Total operating revenues 9,624 170 26 — 9,820 Total operating expenses 9,023 — 26 34 9,083 Operating income 601 170 — (34 ) 737 Total nonoperating expense, net (236 ) — — 34 (202 ) Income before income taxes 365 170 — — 535 Income tax provision 131 64 — — 195 Net income $ 234 $ 106 $ — $ — $ 340 Diluted earnings per common share $ 0.46 $ 0.67 The effects of adoption of the New Revenue Standard to our December 31, 2017 consolidated balance sheet are as follows (in millions): As Reported New Revenue Standard As Recast Deferred tax asset $ 427 $ 1,389 $ 1,816 Air traffic liability 3,978 64 4,042 Current loyalty program liability 2,791 330 3,121 Noncurrent loyalty program liability — 5,701 5,701 Total stockholders' equity (deficit) 3,926 (4,706 ) (780 ) Standards Effective for 2019 Reporting Periods 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 asset on the balance sheet and aligns many of the underlying principles of the new lessor model with those in the New Revenue Standard. 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. We will adopt the New Lease Standard effective January 1, 2019. We are currently evaluating how the adoption of the New Lease Standard will impact our consolidated financial statements. Interpretations are on-going and could have a material impact on our implementation. Currently, we expect that the adoption of the New Lease Standard will have a material impact on our consolidated balance sheet due to the recognition of right-of-use assets and lease liabilities principally for certain leases currently accounted for as operating leases. ASU 2018-02: Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income This ASU provides financial statement preparers with an 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 previously enacted 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, and early adoption is permitted. We expect we will adopt this standard effective January 1, 2019. The adoption of the standard may impact tax amounts stranded in accumulated other comprehensive income related to our pension and retiree medical and other postretirement benefit plans.
American Airlines, Inc. [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements of American Airlines, Inc. (American) should be read in conjunction with the consolidated financial statements contained in American’s Annual Report on Form 10-K for the year ended December 31, 2017 . American is the principal wholly-owned subsidiary of American Airlines Group Inc. (AAG). All significant intercompany transactions have been eliminated. 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. On December 30, 2015, in order to simplify AAG’s internal corporate structure, US Airways Group merged with and into AAG, with AAG as the surviving corporation. Immediately thereafter, US Airways, Inc. (US Airways), a wholly-owned subsidiary of US Airways Group, merged with and into American, with American as the surviving corporation. Management believes that all adjustments necessary for the fair presentation of results, consisting of normally recurring items, have been included in the unaudited condensed consolidated financial statements for the interim periods presented. 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, valuation allowance for deferred tax assets, as well as pension and retiree medical and other postretirement benefits.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Standards Effective for 2018 Reporting Periods Effective January 1, 2018, American adopted the accounting pronouncements described below. ASU 2014-09: Revenue from Contracts with Customers (Topic 606) (the New Revenue Standard) The New Revenue Standard applies to all companies that enter into contracts with customers to transfer goods or services. American adopted the New Revenue Standard using the full retrospective method, which resulted in the recast of prior reporting periods. The adoption of the New Revenue Standard impacted American’s accounting for outstanding mileage credits earned through travel by AAdvantage loyalty program members. There was no change in accounting for sales of mileage credits to co-branded card or other partners. Prior to the adoption of the New Revenue Standard, American used the incremental cost method to account for the portion of its loyalty program liability related to mileage credits earned through travel, which were valued based on the estimated incremental cost of carrying one additional passenger. The New Revenue Standard required American to change its policy to the deferred revenue method and apply a relative selling price approach whereby a portion of each passenger ticket sale attributable to mileage credits earned is deferred and recognized in passenger revenue upon future mileage redemption. The value of the earned mileage credits is materially greater under the deferred revenue method than the value attributed to these mileage credits under the incremental cost method. The New Revenue Standard also required certain reclassifications, principally the reclassification of certain ancillary revenues previously classified and reported as other revenue to passenger revenue and as applicable to cargo revenue. Additionally, the New Revenue Standard required a gross presentation on the face of American’s condensed consolidated statement of operations for certain revenues and expenses that had previously been presented on a net basis. See recast condensed consolidated statement of operations data for the three months ended March 31, 2017 and recast consolidated balance sheet data as of December 31, 2017 presented below for the effects of adoption. ASU 2017-07: Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost (the New Retirement Standard) The New Retirement Standard required all components of American’s net periodic benefit cost (income), with the exception of service cost, previously reported within operating expenses as salaries, wages and benefits, to be reclassified and reported within nonoperating income (expense). The New Retirement Standard was applied retrospectively, which resulted in the recast of each prior reporting period presented. The adoption of the New Retirement Standard had no impact on pre-tax income or net income reported. See recast condensed consolidated statement of operations data for the three months ended March 31, 2017 presented below for the effects of adoption. ASU 2016-01: Financial Instruments - Overall (Subtopic 825-10) This ASU made several modifications to Subtopic 825-10, including the elimination of the available-for-sale classification of equity investments, and it required equity investments with readily determinable fair values to be measured at fair value with changes in fair value recognized in net income. This standard was adopted prospectively as of January 1, 2018 and resulted in a $77 million cumulative effect adjustment credit to retained earnings related to American's investment in China Southern Airlines Company Limited, which was previously accounted for under the cost method. ASU 2016-18: Statement of Cash Flows (Topic 230): Restricted Cash This ASU required that the change in total cash, cash at beginning of period and cash at end of period on the statement of cash flows include restricted cash and restricted cash equivalents and also requires companies who report cash and restricted cash separately on the balance sheet to reconcile those amounts to the statement of cash flows. This standard was applied retrospectively, which resulted in the recast of the prior reporting period in the statement of cash flows. For the three months ended March 31, 2018 and 2017, $103 million and $93 million , respectively, of restricted cash is included in the total of cash and restricted cash balance at the end of period. A reconciliation of cash and restricted cash from American's condensed consolidated statement of cash flows to the amounts reported within its condensed consolidated balance sheet is also included in a table below its condensed consolidated statement of cash flows . Impacts to Prior Period Results The effects of adoption of the New Revenue Standard and New Retirement Standard to American’s condensed consolidated statement of operations for the three months ended March 31, 2017 were as follows (in millions): New Revenue Standard New Retirement Standard As Reported Deferred Revenue Method Reclassifications Reclassifications As Recast Operating revenues: Passenger $ 8,155 $ 170 $ 672 $ — $ 8,997 Cargo 172 — 19 — 191 Other 1,294 — (665 ) — 629 Total operating revenues 9,621 170 26 — 9,817 Total operating expenses 9,017 — 26 34 9,077 Operating income 604 170 — (34 ) 740 Total nonoperating expense, net (193 ) — — 34 (159 ) Income before income taxes 411 170 — — 581 Income tax provision 148 64 — — 212 Net income $ 263 $ 106 $ — $ — $ 369 The effects of adoption of the New Revenue Standard to American’s December 31, 2017 consolidated balance sheet are as follows (in millions): As Reported New Revenue Standard As Recast Deferred tax asset $ 682 $ 1,389 $ 2,071 Air traffic liability 3,978 64 4,042 Current loyalty program liability 2,791 330 3,121 Noncurrent loyalty program liability — 5,701 5,701 Total stockholder’s equity (deficit) 14,594 (4,706 ) 9,888 Standards Effective for 2019 Reporting Periods 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 asset on the balance sheet and aligns many of the underlying principles of the new lessor model with those in the New Revenue Standard. 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. American will adopt the New Lease Standard effective January 1, 2019. American is currently evaluating how the adoption of the New Lease Standard will impact its consolidated financial statements. Interpretations are on-going and could have a material impact on its implementation. Currently, American expects that the adoption of the New Lease Standard will have a material impact on its consolidated balance sheet due to the recognition of right-of-use assets and lease liabilities principally for certain leases currently accounted for as operating leases. ASU 2018-02: Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income This ASU provides financial statement preparers with an 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 previously enacted 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, and early adoption is permitted. American expects it will adopt this standard effective January 1, 2019. The adoption of the standard may impact tax amounts stranded in accumulated other comprehensive income related to American's pension and retiree medical and other postretirement benefit plans.

Basis of Presentation and Rec23

Basis of Presentation and Recent Accounting Pronouncements (Tables)	3 Months Ended
	Mar. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles	The effects of adoption of the New Revenue Standard and New Retirement Standard to our condensed consolidated statement of operations for the three months ended March 31, 2017 were as follows (in millions, except per share amounts): New Revenue Standard New Retirement Standard As Reported Deferred Revenue Method Reclassifications Reclassifications As Recast Operating revenues: Passenger $ 8,155 $ 170 $ 672 $ — $ 8,997 Cargo 172 — 19 — 191 Other 1,297 — (665 ) — 632 Total operating revenues 9,624 170 26 — 9,820 Total operating expenses 9,023 — 26 34 9,083 Operating income 601 170 — (34 ) 737 Total nonoperating expense, net (236 ) — — 34 (202 ) Income before income taxes 365 170 — — 535 Income tax provision 131 64 — — 195 Net income $ 234 $ 106 $ — $ — $ 340 Diluted earnings per common share $ 0.46 $ 0.67 The effects of adoption of the New Revenue Standard to our December 31, 2017 consolidated balance sheet are as follows (in millions): As Reported New Revenue Standard As Recast Deferred tax asset $ 427 $ 1,389 $ 1,816 Air traffic liability 3,978 64 4,042 Current loyalty program liability 2,791 330 3,121 Noncurrent loyalty program liability — 5,701 5,701 Total stockholders' equity (deficit) 3,926 (4,706 ) (780 )
American Airlines, Inc. [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles	The effects of adoption of the New Revenue Standard and New Retirement Standard to American’s condensed consolidated statement of operations for the three months ended March 31, 2017 were as follows (in millions): New Revenue Standard New Retirement Standard As Reported Deferred Revenue Method Reclassifications Reclassifications As Recast Operating revenues: Passenger $ 8,155 $ 170 $ 672 $ — $ 8,997 Cargo 172 — 19 — 191 Other 1,294 — (665 ) — 629 Total operating revenues 9,621 170 26 — 9,817 Total operating expenses 9,017 — 26 34 9,077 Operating income 604 170 — (34 ) 740 Total nonoperating expense, net (193 ) — — 34 (159 ) Income before income taxes 411 170 — — 581 Income tax provision 148 64 — — 212 Net income $ 263 $ 106 $ — $ — $ 369 The effects of adoption of the New Revenue Standard to American’s December 31, 2017 consolidated balance sheet are as follows (in millions): As Reported New Revenue Standard As Recast Deferred tax asset $ 682 $ 1,389 $ 2,071 Air traffic liability 3,978 64 4,042 Current loyalty program liability 2,791 330 3,121 Noncurrent loyalty program liability — 5,701 5,701 Total stockholder’s equity (deficit) 14,594 (4,706 ) 9,888

Special Items, Net (Tables)

Special Items, Net (Tables)	3 Months Ended
	Mar. 31, 2018
Restructuring Cost and Reserve [Line Items]
Components of Special Items, Net Included in Condensed Consolidated Statements of Operations	Special items, net on the condensed consolidated statements of operations consisted of the following (in millions): Three Months Ended March 31, 2018 2017 Fleet restructuring expenses (1) $ 82 $ 63 Merger integration expenses (2) 59 63 Labor contract expenses 13 — Other operating charges, net 41 (7 ) Mainline operating special items, net 195 119 Regional operating special items, net — 2 Debt refinancing and extinguishment charges — 5 Nonoperating special items, net — 5 Income tax special items, net (3) 22 — (1) Fleet restructuring expenses principally included the acceleration of depreciation and impairments for aircraft and related equipment grounded or expected to be grounded earlier than planned. (2) Merger integration expenses included costs associated with our remaining integration projects, principally our flight attendant, human resources, payroll and technical operations integrations. (3) Income tax special items included a $22 million charge to income tax expense to establish a required valuation allowance related to our estimated refund for Alternative Minimum Tax (AMT) credits
American Airlines, Inc. [Member]
Restructuring Cost and Reserve [Line Items]
Components of Special Items, Net Included in Condensed Consolidated Statements of Operations	Special items, net on the condensed consolidated statements of operations consisted of the following (in millions): Three Months Ended March 31, 2018 2017 Fleet restructuring expenses (1) $ 82 $ 63 Merger integration expenses (2) 59 63 Labor contract expenses 13 — Other operating charges, net 41 (7 ) Mainline operating special items, net 195 119 Regional operating special items, net — 2 Debt refinancing and extinguishment charges — 5 Nonoperating special items, net — 5 Income tax special items, net (3) 30 — (1) Fleet restructuring expenses principally included the acceleration of depreciation and impairments for aircraft and related equipment grounded or expected to be grounded earlier than planned. (2) Merger integration expenses included costs associated with American's remaining integration projects, principally its flight attendant, human resources, payroll and technical operations integrations. (3) Income tax special items included a $30 million charge to income tax expense to establish a required valuation allowance related to American's estimated refund for Alternative Minimum Tax (AMT) credits.

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	3 Months Ended
	Mar. 31, 2018
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): Three Months Ended March 31, 2018 2017 Basic EPS: Net income $ 186 $ 340 Weighted average common shares outstanding (in thousands) 472,297 503,902 Basic EPS $ 0.39 $ 0.67 Diluted EPS: Net income for purposes of computing diluted EPS $ 186 $ 340 Share computation for diluted EPS (in thousands): Basic weighted average common shares outstanding 472,297 503,902 Dilutive effect of stock awards 2,301 3,895 Diluted weighted average common shares outstanding 474,598 507,797 Diluted EPS $ 0.39 $ 0.67 Restricted stock unit awards excluded from the calculation of diluted EPS because inclusion would be antidilutive (in thousands) 1 395

Revenue Recognition (Tables)

Revenue Recognition (Tables)	3 Months Ended
	Mar. 31, 2018
Entity Information [Line Items]
Schedule of Passenger Revenue	The following are the significant categories comprising our reported operating revenues (in millions): Three Months Ended March 31, 2018 2017 Passenger revenue: Passenger travel $ 8,630 $ 8,195 Loyalty revenue - travel (1) 850 802 Total passenger revenue 9,480 8,997 Cargo 227 191 Other: Loyalty revenue - marketing services 570 514 Other revenue 124 118 Total other revenue 694 632 Total operating revenues $ 10,401 $ 9,820 (1) Loyalty revenue included in passenger revenue is principally comprised of mileage credit redemptions for air travel awards from mileage credits earned through travel and mileage credits sold to co-branded card and other partners. See discussion of Loyalty Revenue below. The following is our total passenger revenue by geographic region (in millions): Three Months Ended March 31, 2018 2017 Domestic $ 6,963 $ 6,781 Latin America 1,445 1,231 Atlantic 669 624 Pacific 403 361 Total passenger revenue $ 9,480 $ 8,997
Schedule of Contract Liabilities	March 31, 2018 December 31, 2017 (In millions) Loyalty program liability $ 8,786 $ 8,822 Air traffic liability 5,549 4,042 Total $ 14,335 $ 12,864 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 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, 2017 $ 8,822 Deferral of revenue 865 Recognition of revenue (1) (901 ) Balance at March 31, 2018 (2) $ 8,786 (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 March 31, 2018 , our current loyalty program liability was $3.2 billion and represents our current estimate of revenue expected to be recognized in the next twelve months based on historical trends, with the balance reflected in long-term loyalty program liability expected to be recognized as revenue in periods thereafter.
American Airlines, Inc. [Member]
Entity Information [Line Items]
Schedule of Passenger Revenue	The following are the significant categories comprising American's reported operating revenues (in millions): Three Months Ended March 31, 2018 2017 Passenger revenue: Passenger travel $ 8,630 $ 8,195 Loyalty revenue - travel (1) 850 802 Total passenger revenue 9,480 8,997 Cargo 227 191 Other: Loyalty revenue - marketing services 570 514 Other revenue 121 115 Total other revenue 691 629 Total operating revenues $ 10,398 $ 9,817 (1) Loyalty revenue included in passenger revenue is principally comprised of mileage credit redemptions for air travel awards from mileage credits earned through travel and mileage credits sold to co-branded card and other partners. See discussion of Loyalty Revenue below. The following is American's total passenger revenue by geographic region (in millions): Three Months Ended March 31, 2018 2017 Domestic $ 6,963 $ 6,781 Latin America 1,445 1,231 Atlantic 669 624 Pacific 403 361 Total passenger revenue $ 9,480 $ 8,997
Schedule of Contract Liabilities	March 31, 2018 December 31, 2017 (In millions) Loyalty program liability $ 8,786 $ 8,822 Air traffic liability 5,549 4,042 Total $ 14,335 $ 12,864 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 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, 2017 $ 8,822 Deferral of revenue 865 Recognition of revenue (1) (901 ) Balance at March 31, 2018 (2) $ 8,786 (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 March 31, 2018 , 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 twelve months based on historical trends, with the balance reflected in long-term loyalty program liability expected to be recognized as revenue in periods thereafter.

Debt (Tables)

Debt (Tables)	3 Months Ended
	Mar. 31, 2018
Debt Instrument [Line Items]
Schedule of Long-Term Debt	Long-term debt and capital lease obligations included in the condensed consolidated balance sheets consisted of (in millions): March 31, 2018 December 31, 2017 Secured 2013 Credit Facilities, variable interest rate of 3.88%, installments through 2020 $ 1,825 $ 1,825 2014 Credit Facilities, variable interest rate of 3.74%, installments through 2021 728 728 April 2016 Credit Facilities, variable interest rate of 3.88%, installments through 2023 990 990 December 2016 Credit Facilities, variable interest rate of 3.78%, installments through 2023 1,238 1,238 Aircraft enhanced equipment trust certificates (EETCs), fixed interest rates ranging from 3.00% to 9.75%, averaging 4.25%, maturing from 2018 to 2029 11,764 11,881 Equipment loans and other notes payable, fixed and variable interest rates ranging from 2.34% to 8.48%, averaging 3.70%, maturing from 2018 to 2029 5,062 5,259 Special facility revenue bonds, fixed interest rates ranging from 5.00% to 8.00%, maturing from 2018 to 2035 857 857 Other secured obligations, fixed interest rates ranging from 3.81% to 12.24%, maturing from 2021 to 2028 755 773 23,219 23,551 Unsecured 5.50% senior notes, interest only payments until due in 2019 750 750 6.125% senior notes, interest only payments until due in 2018 500 500 4.625% senior notes, interest only payments until due in 2020 500 500 1,750 1,750 Total long-term debt and capital lease obligations 24,969 25,301 Less: Total unamortized debt discount, premium and issuance costs 230 236 Less: Current maturities 2,793 2,554 Long-term debt and capital lease obligations, net of current maturities $ 21,946 $ 22,511
Summary of Availability under Revolving Credit Facilities	The table below shows the maximum availability under revolving credit facilities, all of which were undrawn, as of March 31, 2018 (in millions): 2013 Revolving Facility $ 1,200 2014 Revolving Facility 1,000 April 2016 Revolving Facility 300 Total $ 2,500
Secured Debt [Member] | Enhanced Equipment Trust Certificates (EETC) [Member]
Debt Instrument [Line Items]
Schedule of Long-Term Debt	Certain information regarding the 2017-2 EETC equipment notes and the remaining escrowed proceeds of the 2017-2 EETCs , as of March 31, 2018 , is set forth in the table below. 2017-2 EETCs Series AA Series A Series B Aggregate principal issued $545 million $252 million $221 million Remaining escrowed proceeds $39 million $18 million $16 million Fixed interest rate per annum 3.35% 3.60% 3.70% Maturity date October 2029 October 2029 October 2025
American Airlines, Inc. [Member]
Debt Instrument [Line Items]
Schedule of Long-Term Debt	Long-term debt and capital lease obligations included in the condensed consolidated balance sheets consisted of (in millions): March 31, 2018 December 31, 2017 Secured 2013 Credit Facilities, variable interest rate of 3.88%, installments through 2020 $ 1,825 $ 1,825 2014 Credit Facilities, variable interest rate of 3.74%, installments through 2021 728 728 April 2016 Credit Facilities, variable interest rate of 3.88%, installments through 2023 990 990 December 2016 Credit Facilities, variable interest rate of 3.78%, installments through 2023 1,238 1,238 Aircraft enhanced equipment trust certificates (EETCs), fixed interest rates ranging from 3.00% to 9.75%, averaging 4.25%, maturing from 2018 to 2029 11,764 11,881 Equipment loans and other notes payable, fixed and variable interest rates ranging from 2.34% to 8.48%, averaging 3.70%, maturing from 2018 to 2029 5,062 5,259 Special facility revenue bonds, fixed interest rates ranging from 5.00% to 5.50%, maturing from 2018 to 2035 828 828 Other secured obligations, fixed interest rates ranging from 3.81% to 12.24%, maturing from 2021 to 2028 754 772 Total long-term debt and capital lease obligations 23,189 23,521 Less: Total unamortized debt discount, premium and issuance costs 223 227 Less: Current maturities 2,297 2,058 Long-term debt and capital lease obligations, net of current maturities $ 20,669 $ 21,236
Summary of Availability under Revolving Credit Facilities	The table below shows the maximum availability under revolving credit facilities, all of which were undrawn, as of March 31, 2018 (in millions): 2013 Revolving Facility $ 1,200 2014 Revolving Facility 1,000 April 2016 Revolving Facility 300 Total $ 2,500
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 2017-2 EETC equipment notes and the remaining escrowed proceeds of the 2017-2 EETCs, as of March 31, 2018 , is set forth in the table below. 2017-2 EETCs Series AA Series A Series B Aggregate principal issued $545 million $252 million $221 million Remaining escrowed proceeds $39 million $18 million $16 million Fixed interest rate per annum 3.35% 3.60% 3.70% Maturity date October 2029 October 2029 October 2025

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2018
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 March 31, 2018 Total Level 1 Level 2 Level 3 Short-term investments (1) (2) : Money market funds $ 14 $ 14 $ — $ — Corporate obligations 1,712 — 1,712 — Bank notes/certificates of deposit/time deposits 2,843 — 2,843 — Repurchase agreements 425 — 425 — 4,994 14 4,980 — Restricted cash and short-term investments (1) 294 164 130 — Long-term investments (3) 281 281 — — Total $ 5,569 $ 459 $ 5,110 $ — (1) Unrealized gains or 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 mature in one year or less except for $425 million of bank notes/certificates of deposit/time deposits and $145 million of corporate obligations. (3) Long-term investments primarily include our investment in China Southern Airlines Company Limited and are classified in other assets on our condensed 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): March 31, 2018 December 31, 2017 Carrying Fair Carrying Fair Long-term debt, including current maturities $ 24,739 $ 25,286 $ 25,065 $ 25,848
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 March 31, 2018 Total Level 1 Level 2 Level 3 Short-term investments (1) (2) : Money market funds $ 4 $ 4 $ — $ — Corporate obligations 1,712 — 1,712 — Bank notes/certificates of deposit/time deposits 2,843 — 2,843 — Repurchase agreements 425 — 425 — 4,984 4 4,980 — Restricted cash and short-term investments (1) 294 164 130 — Long-term investments (3) 281 281 — — Total $ 5,559 $ 449 $ 5,110 $ — (1) Unrealized gains or 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 mature in one year or less except for $425 million of bank notes/certificates of deposit/time deposits and $145 million of corporate obligations. (3) Long-term investments primarily include American's investment in China Southern Airlines Company Limited and are classified in other assets on its condensed 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): March 31, 2018 December 31, 2017 Carrying Fair Carrying Fair Long-term debt, including current maturities $ 22,966 $ 23,481 $ 23,294 $ 24,029

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	3 Months Ended
	Mar. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Components of Net Periodic Benefit Cost (Income)	The following table provides the components of net periodic benefit cost (income) (in millions): Pension Benefits Retiree Medical and Other Three Months Ended March 31, 2018 2017 2018 2017 Service cost $ 1 $ 1 $ 1 $ 1 Interest cost 169 180 9 10 Expected return on assets (226 ) (197 ) (6 ) (5 ) Amortization of: Prior service cost (benefit) 7 7 (59 ) (59 ) Unrecognized net loss (gain) 36 36 (5 ) (6 ) Net periodic benefit cost (income) $ (13 ) $ 27 $ (60 ) $ (59 )
American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Components of Net Periodic Benefit Cost (Income)	The following table provides the components of net periodic benefit cost (income) (in millions): Pension Benefits Retiree Medical and Other Three Months Ended March 31, 2018 2017 2018 2017 Service cost $ 1 $ — $ 1 $ 1 Interest cost 168 180 9 10 Expected return on assets (225 ) (196 ) (6 ) (5 ) Amortization of: Prior service cost (benefit) 7 7 (59 ) (59 ) Unrecognized net loss (gain) 36 36 (5 ) (6 ) Net periodic benefit cost (income) $ (13 ) $ 27 $ (60 ) $ (59 )

Accumulated Other Comprehensi30

Accumulated Other Comprehensive Loss (Tables)	3 Months Ended
	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Components of Accumulated Other Comprehensive Loss	The components of accumulated other comprehensive income (loss) (AOCI) are as follows (in millions): Pension, Retiree Unrealized Gain (Loss) on Investments Income Tax (1) Total Balance at December 31, 2017 $ (4,523 ) $ (1 ) $ (630 ) $ (5,154 ) Other comprehensive loss before reclassifications — (2 ) — (2 ) Amounts reclassified from AOCI (21 ) — 5 (2) (16 ) Net current-period other comprehensive income (loss) (21 ) (2 ) 5 (18 ) Balance at March 31, 2018 $ (4,544 ) $ (3 ) $ (625 ) $ (5,172 ) (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 the condensed consolidated statement of operations.
Reclassifications out of Accumulated Other Comprehensive Loss	Reclassifications out of AOCI are as follows (in millions): Amounts reclassified from AOCI Affected line items on the AOCI Components Three Months Ended March 31, 2018 2017 Amortization of pension, retiree medical and other postretirement benefits: Prior service benefit $ (40 ) $ (33 ) Nonoperating other income, net Actuarial loss 24 19 Nonoperating other income, net Total reclassifications for the period, net of tax $ (16 ) $ (14 )
American Airlines, Inc. [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Components of Accumulated Other Comprehensive Loss	The components of accumulated other comprehensive income (loss) (AOCI) are as follows (in millions): Pension, Retiree Unrealized Gain (Loss) on Investments Income Tax (1) Total Balance at December 31, 2017 $ (4,508 ) $ (1 ) $ (742 ) $ (5,251 ) Other comprehensive loss before reclassifications — (2 ) — (2 ) Amounts reclassified from AOCI (21 ) — 5 (2) (16 ) Net current-period other comprehensive income (loss) (21 ) (2 ) 5 (18 ) Balance at March 31, 2018 $ (4,529 ) $ (3 ) $ (737 ) $ (5,269 ) (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 the condensed consolidated statement of operations.
Reclassifications out of Accumulated Other Comprehensive Loss	Reclassifications out of AOCI are as follows (in millions): Amounts reclassified from AOCI Affected line items on the condensed consolidated statements of operations AOCI Components Three Months Ended March 31, 2018 2017 Amortization of pension, retiree medical and other postretirement benefits: Prior service benefit $ (40 ) $ (33 ) Nonoperating other income, net Actuarial loss 24 19 Nonoperating other income, net Total reclassifications for the period, net of tax $ (16 ) $ (14 )

Regional Expenses (Tables)

Regional Expenses (Tables)	3 Months Ended
	Mar. 31, 2018
Regional Expenses [Line Items]
Components of Regional Expenses	Regional expenses consist of the following (in millions): Three Months Ended March 31, 2018 2017 Aircraft fuel and related taxes $ 398 $ 318 Salaries, wages and benefits 383 345 Capacity purchases from third-party regional carriers 354 393 Maintenance, materials and repairs 80 69 Other rent and landing fees 147 152 Aircraft rent 9 9 Selling expenses 85 80 Depreciation and amortization 82 79 Special items, net — 2 Other 160 126 Total regional expenses $ 1,698 $ 1,573
American Airlines, Inc. [Member]
Regional Expenses [Line Items]
Components of Regional Expenses	Regional expenses consist of the following (in millions): Three Months Ended March 31, 2018 2017 Aircraft fuel and related taxes $ 398 $ 318 Salaries, wages and benefits 82 75 Capacity purchases from third-party regional carriers 798 801 Maintenance, materials and repairs 2 1 Other rent and landing fees 141 146 Aircraft rent 7 7 Selling expenses 85 80 Depreciation and amortization 68 64 Special items, net — 2 Other 101 75 Total regional expenses $ 1,682 $ 1,569

Transactions with Related Par32

Transactions with Related Parties (Tables)	3 Months Ended
	Mar. 31, 2018
American Airlines, Inc. [Member]
Entity Information [Line Items]
Summary of Net Receivables (Payables) to Related Parties	The following represents the net receivables (payables) to related parties (in millions): March 31, 2018 December 31, 2017 AAG (1) $ 11,540 $ 10,968 AAG’s wholly-owned subsidiaries (2) (2,135 ) (2,146 ) Total $ 9,405 $ 8,822 (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 Rec33

Basis of Presentation and Recent Accounting Pronouncements - New Accounting Standards (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Jan. 01, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Restricted cash	$ 103	$ 93
Operating revenues:
Passenger	9,480	8,997
Cargo	227	191
Other	694	632
Total operating revenues	10,401	9,820
Total operating expenses	9,970	9,083
Operating income	431	737
Total nonoperating expense, net	(158)	(202)
Income before income taxes	273	535
Income tax provision	87	195
Net income	$ 186	$ 340
Diluted earnings per common share (in dollars per share)	$ 0.39	$ 0.67
Deferred tax asset	$ 1,581			$ 1,816
Air traffic liability	5,549			4,042
Current loyalty program liability	3,176			3,121
Noncurrent loyalty program liability	5,610			5,701
Total stockholders' equity (deficit)	(1,018)			(780)
Previously Reported [Member]
Operating revenues:
Passenger		$ 8,155
Cargo		172
Other		1,297
Total operating revenues		9,624
Total operating expenses		9,023
Operating income		601
Total nonoperating expense, net		(236)
Income before income taxes		365
Income tax provision		131
Net income		$ 234
Diluted earnings per common share (in dollars per share)		$ 0.46
Deferred tax asset				427
Air traffic liability				3,978
Current loyalty program liability				2,791
Noncurrent loyalty program liability				0
Total stockholders' equity (deficit)				3,926
Restatement Adjustment [Member] | Accounting Standards Update 2014-09 [Member]
Operating revenues:
Deferred tax asset				1,389
Air traffic liability				64
Current loyalty program liability				330
Noncurrent loyalty program liability				5,701
Total stockholders' equity (deficit)				(4,706)
Restatement Adjustment [Member] | Accounting Standards Update 2014-09, Deferred Revenue Method [Member]
Operating revenues:
Passenger		$ 170
Total operating revenues		170
Operating income		170
Income before income taxes		170
Income tax provision		64
Net income		106
Restatement Adjustment [Member] | Accounting Standards Update 2014-09, Reclassifications [Member]
Operating revenues:
Passenger		672
Cargo		19
Other		(665)
Total operating revenues		26
Total operating expenses		26
Restatement Adjustment [Member] | Accounting Standards Update 2017-07 [Member]
Operating revenues:
Total operating expenses		34
Operating income		(34)
Total nonoperating expense, net		34
Retained Earnings [Member] | Accounting Standards Update 2016-01 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption			$ 77
American Airlines, Inc. [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Restricted cash	103	93
Operating revenues:
Passenger	9,480	8,997
Cargo	227	191
Other	691	629
Total operating revenues	10,398	9,817
Total operating expenses	9,951	9,077
Operating income	447	740
Total nonoperating expense, net	(98)	(159)
Income before income taxes	349	581
Income tax provision	113	212
Net income	236	369
Deferred tax asset	1,757			2,071
Air traffic liability	5,549			4,042
Current loyalty program liability	3,176			3,121
Noncurrent loyalty program liability	5,610			5,701
Total stockholders' equity (deficit)	$ 10,207			9,888
American Airlines, Inc. [Member] | Previously Reported [Member]
Operating revenues:
Passenger		8,155
Cargo		172
Other		1,294
Total operating revenues		9,621
Total operating expenses		9,017
Operating income		604
Total nonoperating expense, net		(193)
Income before income taxes		411
Income tax provision		148
Net income		263
Deferred tax asset				682
Air traffic liability				3,978
Current loyalty program liability				2,791
Noncurrent loyalty program liability				0
Total stockholders' equity (deficit)				14,594
American Airlines, Inc. [Member] | Restatement Adjustment [Member] | Accounting Standards Update 2014-09 [Member]
Operating revenues:
Deferred tax asset				1,389
Air traffic liability				64
Current loyalty program liability				330
Noncurrent loyalty program liability				5,701
Total stockholders' equity (deficit)				$ (4,706)
American Airlines, Inc. [Member] | Restatement Adjustment [Member] | Accounting Standards Update 2014-09, Deferred Revenue Method [Member]
Operating revenues:
Passenger		170
Total operating revenues		170
Operating income		170
Income before income taxes		170
Income tax provision		64
Net income		106
American Airlines, Inc. [Member] | Restatement Adjustment [Member] | Accounting Standards Update 2014-09, Reclassifications [Member]
Operating revenues:
Passenger		672
Cargo		19
Other		(665)
Total operating revenues		26
Total operating expenses		26
American Airlines, Inc. [Member] | Restatement Adjustment [Member] | Accounting Standards Update 2017-07 [Member]
Operating revenues:
Total operating expenses		34
Operating income		(34)
Total nonoperating expense, net		$ 34
American Airlines, Inc. [Member] | Retained Earnings [Member] | Accounting Standards Update 2016-01 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption			$ 77

Special Items, Net - Components

Special Items, Net - Components of Special Items, Net (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Restructuring Cost and Reserve [Line Items]
Fleet restructuring expenses	$ 82	$ 63
Merger integration expenses	59	63
Labor contract expenses	13	0
Other operating charges, net	41	(7)
Mainline operating special items, net	195	119
Regional operating special items, net	0	2
Debt refinancing and extinguishment charges	0	5
Nonoperating special items, net	0	5
Income tax special items, net	22	0
American Airlines, Inc. [Member]
Restructuring Cost and Reserve [Line Items]
Fleet restructuring expenses	82	63
Merger integration expenses	59	63
Labor contract expenses	13	0
Other operating charges, net	41	(7)
Mainline operating special items, net	195	119
Regional operating special items, net	0	2
Debt refinancing and extinguishment charges	0	5
Nonoperating special items, net	0	5
Income tax special items, net	$ 30	$ 0

Earnings Per Common Share - Com

Earnings Per Common Share - Computation of Basic and Diluted Earnings per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Basic EPS:
Net income	$ 186	$ 340
Weighted average common shares outstanding (in thousands) (in shares)	472,297	503,902
Basic EPS (in dollars per share)	$ 0.39	$ 0.67
Diluted EPS:
Net income for purposes of computing diluted EPS	$ 186	$ 340
Share computation for diluted EPS (in thousands):
Basic weighted average common shares outstanding (in shares)	472,297	503,902
Dilutive effect of stock awards (in shares)	2,301	3,895
Diluted weighted average common shares outstanding (in shares)	474,598	507,797
Diluted EPS (in dollars per share)	$ 0.39	$ 0.67
Restricted stock unit awards excluded from the calculation of diluted EPS because inclusion would be antidilutive (in thousands) (in shares)	1	395

Share Repurchase Programs and36

Share Repurchase Programs and Dividends - Share Repurchase Programs (Detail) $ / shares in Units, shares in Millions	3 Months Ended	45 Months Ended
	Mar. 31, 2018USD ($)$ / sharesshares	Mar. 31, 2018USD ($)program$ / sharesshares
Equity [Abstract]
Number of share repurchase programs authorized | program		6
Stock repurchase programs, authorized amount	$ 11,000,000,000	$ 11,000,000,000
Stock repurchase programs, remaining authorized amount	$ 0	$ 0
Stock repurchased (in shares) | shares	8.4	270.7
Aggregate stock repurchase price	$ 450,000,000	$ 11,000,000,000
Average cost per share (in dollars per share) | $ / shares	$ 53.32	$ 40.63

Share Repurchase Programs and37

Share Repurchase Programs and Dividends - Dividends (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Equity [Abstract]
Cash dividends declared (in dollars per share)	$ 0.1	$ 0.1
Payments of dividends	$ 48

Revenue Recognition - Significa

Revenue Recognition - Significant Categories of Reported Operating Revenues (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue from External Customer [Line Items]
Passenger revenue	$ 9,480	$ 8,997
Cargo	227	191
Other	694	632
Total operating revenues	10,401	9,820
Passenger travel [Member]
Revenue from External Customer [Line Items]
Passenger revenue	8,630	8,195
Loyalty revenue - travel [Member]
Revenue from External Customer [Line Items]
Passenger revenue	850	802
Loyalty revenue - marketing services [Member]
Revenue from External Customer [Line Items]
Other	570	514
Other revenue [Member]
Revenue from External Customer [Line Items]
Other	124	118
American Airlines, Inc. [Member]
Revenue from External Customer [Line Items]
Passenger revenue	9,480	8,997
Cargo	227	191
Other	691	629
Total operating revenues	10,398	9,817
American Airlines, Inc. [Member] | Passenger travel [Member]
Revenue from External Customer [Line Items]
Passenger revenue	8,630	8,195
American Airlines, Inc. [Member] | Loyalty revenue - travel [Member]
Revenue from External Customer [Line Items]
Passenger revenue	850	802
American Airlines, Inc. [Member] | Loyalty revenue - marketing services [Member]
Revenue from External Customer [Line Items]
Other	570	514
American Airlines, Inc. [Member] | Other revenue [Member]
Revenue from External Customer [Line Items]
Other	$ 121	$ 115

Revenue Recognition - Passenger

Revenue Recognition - Passenger Revenue by Geographic Region (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Airline Destination Disclosure [Line Items]
Passenger revenue	$ 9,480	$ 8,997
Domestic [Member]
Airline Destination Disclosure [Line Items]
Passenger revenue	6,963	6,781
Latin America [Member]
Airline Destination Disclosure [Line Items]
Passenger revenue	1,445	1,231
Atlantic [Member]
Airline Destination Disclosure [Line Items]
Passenger revenue	669	624
Pacific [Member]
Airline Destination Disclosure [Line Items]
Passenger revenue	403	361
American Airlines, Inc. [Member]
Airline Destination Disclosure [Line Items]
Passenger revenue	9,480	8,997
American Airlines, Inc. [Member] | Domestic [Member]
Airline Destination Disclosure [Line Items]
Passenger revenue	6,963	6,781
American Airlines, Inc. [Member] | Latin America [Member]
Airline Destination Disclosure [Line Items]
Passenger revenue	1,445	1,231
American Airlines, Inc. [Member] | Atlantic [Member]
Airline Destination Disclosure [Line Items]
Passenger revenue	669	624
American Airlines, Inc. [Member] | Pacific [Member]
Airline Destination Disclosure [Line Items]
Passenger revenue	$ 403	$ 361

Revenue Recognition - Signifi40

Revenue Recognition - Significant Contract Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Contract balances, liability	$ 14,335	$ 12,864
Loyalty program liability [Member]
Disaggregation of Revenue [Line Items]
Contract balances, liability	8,786	8,822
Air traffic liability [Member]
Disaggregation of Revenue [Line Items]
Contract balances, liability	5,549	4,042
American Airlines, Inc. [Member]
Disaggregation of Revenue [Line Items]
Contract balances, liability	14,335	12,864
American Airlines, Inc. [Member] | Loyalty program liability [Member]
Disaggregation of Revenue [Line Items]
Contract balances, liability	8,786	8,822
American Airlines, Inc. [Member] | Air traffic liability [Member]
Disaggregation of Revenue [Line Items]
Contract balances, liability	$ 5,549	$ 4,042

Revenue Recognition - Changes i

Revenue Recognition - Changes in Loyalty Program Liability (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Movement In Contract With Customer, Liability [Roll Forward]
Beginning balance	$ 12,864
Ending balance	$ 14,335
Inactive period before expiration of mileage credits	18 months
Current loyalty program liability	$ 3,176	$ 3,121
Loyalty program liability [Member]
Movement In Contract With Customer, Liability [Roll Forward]
Beginning balance	8,822
Deferral of revenue	865
Recognition of revenue	(901)
Ending balance	8,786
American Airlines, Inc. [Member]
Movement In Contract With Customer, Liability [Roll Forward]
Beginning balance	12,864
Ending balance	$ 14,335
Inactive period before expiration of mileage credits	18 months
Current loyalty program liability	$ 3,176	$ 3,121
American Airlines, Inc. [Member] | Loyalty program liability [Member]
Movement In Contract With Customer, Liability [Roll Forward]
Beginning balance	8,822
Deferral of revenue	865
Recognition of revenue	(901)
Ending balance	$ 8,786

Revenue Recognition - Narrative

Revenue Recognition - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018USD ($)component	Mar. 31, 2017USD ($)
Disaggregation of Revenue [Line Items]
Other revenue	$ 694	$ 632
Loyalty program [Member]
Disaggregation of Revenue [Line Items]
Number of revenue components | component	2
Recognition of revenue	$ 901
Loyalty program [Member] | Minimum [Member]
Disaggregation of Revenue [Line Items]
Contract duration	1 year
Loyalty program [Member] | Maximum [Member]
Disaggregation of Revenue [Line Items]
Contract duration	9 years
Loyalty revenue - marketing services [Member]
Disaggregation of Revenue [Line Items]
Other revenue	$ 570	514
Air traffic liability [Member]
Disaggregation of Revenue [Line Items]
Contract duration	1 year
Recognition of revenue	$ 2,100
American Airlines, Inc. [Member]
Disaggregation of Revenue [Line Items]
Other revenue	$ 691	629
American Airlines, Inc. [Member] | Loyalty program [Member]
Disaggregation of Revenue [Line Items]
Number of revenue components | component	2
Recognition of revenue	$ 901
American Airlines, Inc. [Member] | Loyalty program [Member] | Minimum [Member]
Disaggregation of Revenue [Line Items]
Contract duration	1 year
American Airlines, Inc. [Member] | Loyalty program [Member] | Maximum [Member]
Disaggregation of Revenue [Line Items]
Contract duration	9 years
American Airlines, Inc. [Member] | Loyalty revenue - marketing services [Member]
Disaggregation of Revenue [Line Items]
Other revenue	$ 570	$ 514
American Airlines, Inc. [Member] | Air traffic liability [Member]
Disaggregation of Revenue [Line Items]
Contract duration	1 year
Recognition of revenue	$ 2,100

Debt - Components of Long-Term

Debt - Components of Long-Term Debt (Detail) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Total long-term debt and capital lease obligations	$ 24,969	$ 25,301
Less: Total unamortized debt discount, premium and issuance costs	230	236
Less: Current maturities	2,793	2,554
Long-term debt and capital lease obligations, net of current maturities	21,946	22,511
Secured Debt [Member]
Debt Instrument [Line Items]
Total long-term debt and capital lease obligations	23,219	23,551
Secured Debt [Member] | 2013 Credit Facilities [Member]
Debt Instrument [Line Items]
Total long-term debt and capital lease obligations	$ 1,825	1,825
Interest rate	3.88%
Secured Debt [Member] | 2014 Credit Facilities [Member]
Debt Instrument [Line Items]
Total long-term debt and capital lease obligations	$ 728	728
Interest rate	3.74%
Secured Debt [Member] | April 2016 Credit Facilities [Member]
Debt Instrument [Line Items]
Total long-term debt and capital lease obligations	$ 990	990
Interest rate	3.88%
Secured Debt [Member] | December 2016 Credit Facilities [Member]
Debt Instrument [Line Items]
Total long-term debt and capital lease obligations	$ 1,238	1,238
Interest rate	3.78%
Secured Debt [Member] | Enhanced Equipment Trust Certificates (EETC) [Member]
Debt Instrument [Line Items]
Total long-term debt and capital lease obligations	$ 11,764	11,881
Average interest rate	4.25%
Secured Debt [Member] | Enhanced Equipment Trust Certificates (EETC) [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate	3.00%
Secured Debt [Member] | Enhanced Equipment Trust Certificates (EETC) [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate	9.75%
Secured Debt [Member] | Equipment Loans and Other Notes Payable [Member]
Debt Instrument [Line Items]
Total long-term debt and capital lease obligations	$ 5,062	5,259
Average interest rate	3.70%
Secured Debt [Member] | Equipment Loans and Other Notes Payable [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate	2.34%
Secured Debt [Member] | Equipment Loans and Other Notes Payable [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate	8.48%
Secured Debt [Member] | Special Facility Revenue Bonds [Member]
Debt Instrument [Line Items]
Total long-term debt and capital lease obligations	$ 857	857
Secured Debt [Member] | Special Facility Revenue Bonds [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate	5.00%
Secured Debt [Member] | Special Facility Revenue Bonds [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate	8.00%
Secured Debt [Member] | Other Secured Obligations [Member]
Debt Instrument [Line Items]
Total long-term debt and capital lease obligations	$ 755	773
Secured Debt [Member] | Other Secured Obligations [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate	3.81%
Secured Debt [Member] | Other Secured Obligations [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate	12.24%
Unsecured Debt [Member]
Debt Instrument [Line Items]
Total long-term debt and capital lease obligations	$ 1,750	1,750
Unsecured Debt [Member] | 5.50% Senior Notes [Member]
Debt Instrument [Line Items]
Total long-term debt and capital lease obligations	$ 750	750
Interest rate	5.50%
Unsecured Debt [Member] | 6.125% Senior Notes [Member]
Debt Instrument [Line Items]
Total long-term debt and capital lease obligations	$ 500	500
Interest rate	6.125%
Unsecured Debt [Member] | 4.625% Senior Notes [Member]
Debt Instrument [Line Items]
Total long-term debt and capital lease obligations	$ 500	500
Interest rate	4.625%
American Airlines, Inc. [Member]
Debt Instrument [Line Items]
Less: Total unamortized debt discount, premium and issuance costs	$ 223	227
Less: Current maturities	2,297	2,058
Long-term debt and capital lease obligations, net of current maturities	20,669	21,236
American Airlines, Inc. [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Total long-term debt and capital lease obligations	23,189	23,521
American Airlines, Inc. [Member] | Secured Debt [Member] | 2013 Credit Facilities [Member]
Debt Instrument [Line Items]
Total long-term debt and capital lease obligations	$ 1,825	1,825
Interest rate	3.88%
American Airlines, Inc. [Member] | Secured Debt [Member] | 2014 Credit Facilities [Member]
Debt Instrument [Line Items]
Total long-term debt and capital lease obligations	$ 728	728
Interest rate	3.74%
American Airlines, Inc. [Member] | Secured Debt [Member] | April 2016 Credit Facilities [Member]
Debt Instrument [Line Items]
Total long-term debt and capital lease obligations	$ 990	990
Interest rate	3.88%
American Airlines, Inc. [Member] | Secured Debt [Member] | December 2016 Credit Facilities [Member]
Debt Instrument [Line Items]
Total long-term debt and capital lease obligations	$ 1,238	1,238
Interest rate	3.78%
American Airlines, Inc. [Member] | Secured Debt [Member] | Enhanced Equipment Trust Certificates (EETC) [Member]
Debt Instrument [Line Items]
Total long-term debt and capital lease obligations	$ 11,764	11,881
Average interest rate	4.25%
American Airlines, Inc. [Member] | Secured Debt [Member] | Enhanced Equipment Trust Certificates (EETC) [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate	3.00%
American Airlines, Inc. [Member] | Secured Debt [Member] | Enhanced Equipment Trust Certificates (EETC) [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate	9.75%
American Airlines, Inc. [Member] | Secured Debt [Member] | Equipment Loans and Other Notes Payable [Member]
Debt Instrument [Line Items]
Total long-term debt and capital lease obligations	$ 5,062	5,259
Average interest rate	3.70%
American Airlines, Inc. [Member] | Secured Debt [Member] | Equipment Loans and Other Notes Payable [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate	2.34%
American Airlines, Inc. [Member] | Secured Debt [Member] | Equipment Loans and Other Notes Payable [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate	8.48%
American Airlines, Inc. [Member] | Secured Debt [Member] | Special Facility Revenue Bonds [Member]
Debt Instrument [Line Items]
Total long-term debt and capital lease obligations	$ 828	828
American Airlines, Inc. [Member] | Secured Debt [Member] | Special Facility Revenue Bonds [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate	5.00%
American Airlines, Inc. [Member] | Secured Debt [Member] | Special Facility Revenue Bonds [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate	5.50%
American Airlines, Inc. [Member] | Secured Debt [Member] | Other Secured Obligations [Member]
Debt Instrument [Line Items]
Total long-term debt and capital lease obligations	$ 754	$ 772
American Airlines, Inc. [Member] | Secured Debt [Member] | Other Secured Obligations [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate	3.81%
American Airlines, Inc. [Member] | Secured Debt [Member] | Other Secured Obligations [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate	12.24%

Debt - Summary of Availability

Debt - Summary of Availability under Revolving Credit Facilities (Detail) - Revolving Credit Facility [Member] - Secured Debt [Member]	Mar. 31, 2018USD ($)
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 2,500,000,000
2013 Credit Facilities [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	1,200,000,000
2014 Credit Facilities [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	1,000,000,000
April 2016 Credit Facilities [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	300,000,000
American Airlines, Inc. [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	2,500,000,000
American Airlines, Inc. [Member] | 2013 Credit Facilities [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	1,200,000,000
American Airlines, Inc. [Member] | 2014 Credit Facilities [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	1,000,000,000
American Airlines, Inc. [Member] | April 2016 Credit Facilities [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 300,000,000

Debt - 2017-2 EETCs (Detail)

Debt - 2017-2 EETCs (Detail) - Enhanced Equipment Trust Certificates (EETC) [Member] - 2017-2 EETC [Member] $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2018USD ($)Aircraft	Dec. 31, 2017USD ($)Aircraft
Debt Instrument [Line Items]
Repayments of long-term debt	$ 210	$ 735
Debt instrument principal amount	$ 1,000
Number of aircrafts financed through repurchased debt | Aircraft	4	24
Number of aircraft financed by debt issuance | Aircraft	30
Debt instrument, remaining escrowed proceeds	$ 73
American Airlines, Inc. [Member]
Debt Instrument [Line Items]
Repayments of long-term debt	210	$ 735
Debt instrument principal amount	$ 1,000
Number of aircrafts financed through repurchased debt | Aircraft	4	24
Number of aircraft financed by debt issuance | Aircraft	30
Debt instrument, remaining escrowed proceeds	$ 73

Debt - 2017-2 EETCs - Certain

Debt - 2017-2 EETCs - Certain Information (Detail) - Enhanced Equipment Trust Certificates (EETC) [Member] $ in Millions	Mar. 31, 2018USD ($)
2017-2 EETC - Series AA [Member]
Debt Instrument [Line Items]
Debt instrument, aggregate principal issued	$ 545
Debt instrument, remaining escrowed proceeds	$ 39
Debt instrument, stated interest rate percentage	3.35%
2017-2 EETC - Series A [Member]
Debt Instrument [Line Items]
Debt instrument, aggregate principal issued	$ 252
Debt instrument, remaining escrowed proceeds	$ 18
Debt instrument, stated interest rate percentage	3.60%
2017-2 EETC - Series B [Member]
Debt Instrument [Line Items]
Debt instrument, aggregate principal issued	$ 221
Debt instrument, remaining escrowed proceeds	$ 16
Debt instrument, stated interest rate percentage	3.70%
American Airlines, Inc. [Member] | 2017-2 EETC - Series AA [Member]
Debt Instrument [Line Items]
Debt instrument, aggregate principal issued	$ 545
Debt instrument, remaining escrowed proceeds	$ 39
Debt instrument, stated interest rate percentage	3.35%
American Airlines, Inc. [Member] | 2017-2 EETC - Series A [Member]
Debt Instrument [Line Items]
Debt instrument, aggregate principal issued	$ 252
Debt instrument, remaining escrowed proceeds	$ 18
Debt instrument, stated interest rate percentage	3.60%
American Airlines, Inc. [Member] | 2017-2 EETC - Series B [Member]
Debt Instrument [Line Items]
Debt instrument, aggregate principal issued	$ 221
Debt instrument, remaining escrowed proceeds	$ 16
Debt instrument, stated interest rate percentage	3.70%

Income Taxes (Detail)

Income Taxes (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Income Taxes [Line Items]
Income tax provision	$ 87	$ 195
Alternative Minimum Tax Credit Carryforward [Member]
Income Taxes [Line Items]
Alternative minimum tax credit carryforwards			$ 339
Alternative Minimum Tax Credit Carryforward [Member]
Income Taxes [Line Items]
Change in deferred tax assets valuation allowance	22
Federal [Member]
Income Taxes [Line Items]
Gross NOL Carryforwards			10,000
State [Member]
Income Taxes [Line Items]
Gross NOL Carryforwards			3,400
American Airlines, Inc. [Member]
Income Taxes [Line Items]
Income tax provision	113	$ 212
American Airlines, Inc. [Member] | Alternative Minimum Tax Credit Carryforward [Member]
Income Taxes [Line Items]
Alternative minimum tax credit carryforwards			452
American Airlines, Inc. [Member] | Alternative Minimum Tax Credit Carryforward [Member]
Income Taxes [Line Items]
Change in deferred tax assets valuation allowance	$ 30
American Airlines, Inc. [Member] | Federal [Member]
Income Taxes [Line Items]
Gross NOL Carryforwards			10,600
American Airlines, Inc. [Member] | State [Member]
Income Taxes [Line Items]
Gross NOL Carryforwards			$ 3,200

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Assets Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	$ 4,994	$ 4,771
Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	4,994
Restricted cash and short-term investments	294
Long-term investments	281
Total	5,569
Recurring [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	14
Recurring [Member] | Corporate Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	1,712
Recurring [Member] | Corporate Obligations [Member] | Maturity Dates Exceeding One Year [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	145
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	2,843
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	425
Recurring [Member] | Repurchase Agreements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	425
Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	14
Restricted cash and short-term investments	164
Long-term investments	281
Total	459
Recurring [Member] | Level 1 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	14
Recurring [Member] | Level 1 [Member] | Corporate Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0
Recurring [Member] | Level 1 [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	0
Recurring [Member] | Level 1 [Member] | Repurchase Agreements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0
Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	4,980
Restricted cash and short-term investments	130
Long-term investments	0
Total	5,110
Recurring [Member] | Level 2 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0
Recurring [Member] | Level 2 [Member] | Corporate Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	1,712
Recurring [Member] | Level 2 [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	2,843
Recurring [Member] | Level 2 [Member] | Repurchase Agreements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	425
Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0
Restricted cash and short-term investments	0
Long-term investments	0
Total	0
Recurring [Member] | Level 3 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0
Recurring [Member] | Level 3 [Member] | Corporate Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0
Recurring [Member] | Level 3 [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	0
Recurring [Member] | Level 3 [Member] | Repurchase Agreements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0
American Airlines, Inc. [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	4,984	$ 4,768
American Airlines, Inc. [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	4,984
Restricted cash and short-term investments	294
Long-term investments	281
Total	5,559
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	4
American Airlines, Inc. [Member] | Recurring [Member] | Corporate Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	1,712
American Airlines, Inc. [Member] | Recurring [Member] | Corporate Obligations [Member] | Maturity Dates Exceeding One Year [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	145
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	2,843
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	425
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	425
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	4
Restricted cash and short-term investments	164
Long-term investments	281
Total	449
American Airlines, Inc. [Member] | Recurring [Member] | Level 1 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	4
American Airlines, Inc. [Member] | Recurring [Member] | Level 1 [Member] | Corporate Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0
American Airlines, Inc. [Member] | Recurring [Member] | Level 1 [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	0
American Airlines, Inc. [Member] | Recurring [Member] | Level 1 [Member] | Repurchase Agreements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0
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	4,980
Restricted cash and short-term investments	130
Long-term investments	0
Total	5,110
American Airlines, Inc. [Member] | Recurring [Member] | Level 2 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0
American Airlines, Inc. [Member] | Recurring [Member] | Level 2 [Member] | Corporate Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	1,712
American Airlines, Inc. [Member] | Recurring [Member] | Level 2 [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	2,843
American Airlines, Inc. [Member] | Recurring [Member] | Level 2 [Member] | Repurchase Agreements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	425
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
Restricted cash and short-term investments	0
Long-term investments	0
Total	0
American Airlines, Inc. [Member] | Recurring [Member] | Level 3 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0
American Airlines, Inc. [Member] | Recurring [Member] | Level 3 [Member] | Corporate Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0
American Airlines, Inc. [Member] | Recurring [Member] | Level 3 [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	0
American Airlines, Inc. [Member] | Recurring [Member] | Level 3 [Member] | Repurchase Agreements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	$ 0

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Carrying Value and Estimated Fair Value of Long-Term Debt, Including Current Maturities (Detail) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Carrying Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, including current maturities	$ 24,739	$ 25,065
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	25,286	25,848
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	22,966	23,294
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	$ 23,481	$ 24,029

Employee Benefit Plans - Compon

Employee Benefit Plans - Components of Net Periodic Benefit Cost (Income) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Pension Benefits [Member]
Components of net periodic benefit cost:
Service cost	$ 1	$ 1
Interest cost	169	180
Expected return on assets	(226)	(197)
Prior service cost (benefit)	7	7
Unrecognized net loss (gain)	36	36
Net periodic benefit cost (income)	(13)	27
Retiree Medical And Other Postretirement Benefits [Member]
Components of net periodic benefit cost:
Service cost	1	1
Interest cost	9	10
Expected return on assets	(6)	(5)
Prior service cost (benefit)	(59)	(59)
Unrecognized net loss (gain)	(5)	(6)
Net periodic benefit cost (income)	(60)	(59)
American Airlines, Inc. [Member] | Pension Benefits [Member]
Components of net periodic benefit cost:
Service cost	1	0
Interest cost	168	180
Expected return on assets	(225)	(196)
Prior service cost (benefit)	7	7
Unrecognized net loss (gain)	36	36
Net periodic benefit cost (income)	(13)	27
American Airlines, Inc. [Member] | Retiree Medical And Other Postretirement Benefits [Member]
Components of net periodic benefit cost:
Service cost	1	1
Interest cost	9	10
Expected return on assets	(6)	(5)
Prior service cost (benefit)	(59)	(59)
Unrecognized net loss (gain)	(5)	(6)
Net periodic benefit cost (income)	$ (60)	$ (59)

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2018USD ($)
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 155,000,000
Supplemental contributions by employer	116,000,000
Minimum contributions by employer	39,000,000
American Airlines, Inc. [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	155,000,000
Supplemental contributions by employer	116,000,000
Minimum contributions by employer	$ 39,000,000

Accumulated Other Comprehensi52

Accumulated Other Comprehensive Loss - Components of AOCI (Loss) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
AOCI tax, attributable to parent [Roll Forward]
Beginning balance, tax	$ (630)
Other comprehensive loss before reclassifications, tax	0
Amounts reclassified from AOCI, tax	5
Net current-period other comprehensive income (loss), tax	5
Ending balance, tax	(625)
AOCI attributable to parent, net of tax [Roll Forward]
Beginning balance, net of tax	(5,154)
Other comprehensive loss before reclassifications, net of tax	(2)
Amounts reclassified from AOCI, net of tax	16	$ 14
Total other comprehensive loss, net of tax	(18)	(14)
Ending balance, net of tax	(5,172)
Pension, Retiree Medical and Other Postretirement Benefits [Member]
AOCI attributable to parent, before tax [Roll Forward]
Beginning balance, before tax	(4,523)
Other comprehensive loss, before reclassifications, before tax	0
Amounts reclassified from AOCI, before tax	(21)
Net current-period other comprehensive income (loss), before tax	(21)
Ending balance, before tax	(4,544)
Unrealized Gain (Loss) on Investments [Member]
AOCI attributable to parent, before tax [Roll Forward]
Beginning balance, before tax	(1)
Other comprehensive loss, before reclassifications, before tax	(2)
Amounts reclassified from AOCI, before tax	0
Net current-period other comprehensive income (loss), before tax	(2)
Ending balance, before tax	(3)
American Airlines, Inc. [Member]
AOCI tax, attributable to parent [Roll Forward]
Beginning balance, tax	(742)
Other comprehensive loss before reclassifications, tax	0
Amounts reclassified from AOCI, tax	5
Net current-period other comprehensive income (loss), tax	5
Ending balance, tax	(737)
AOCI attributable to parent, net of tax [Roll Forward]
Beginning balance, net of tax	(5,251)
Other comprehensive loss before reclassifications, net of tax	(2)
Amounts reclassified from AOCI, net of tax	16	14
Total other comprehensive loss, net of tax	(18)	$ (14)
Ending balance, net of tax	(5,269)
American Airlines, Inc. [Member] | Pension, Retiree Medical and Other Postretirement Benefits [Member]
AOCI attributable to parent, before tax [Roll Forward]
Beginning balance, before tax	(4,508)
Other comprehensive loss, before reclassifications, before tax	0
Amounts reclassified from AOCI, before tax	(21)
Net current-period other comprehensive income (loss), before tax	(21)
Ending balance, before tax	(4,529)
American Airlines, Inc. [Member] | Unrealized Gain (Loss) on Investments [Member]
AOCI attributable to parent, before tax [Roll Forward]
Beginning balance, before tax	(1)
Other comprehensive loss, before reclassifications, before tax	(2)
Amounts reclassified from AOCI, before tax	0
Net current-period other comprehensive income (loss), before tax	(2)
Ending balance, before tax	$ (3)

Accumulated Other Comprehensi53

Accumulated Other Comprehensive Loss - Reclassifications out of AOCI (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications out of AOCI	$ (16)	$ (14)
Prior Service Benefit [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications out of AOCI	(40)	(33)
Actuarial Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications out of AOCI	24	19
American Airlines, Inc. [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications out of AOCI	(16)	(14)
American Airlines, Inc. [Member] | Prior Service Benefit [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications out of AOCI	(40)	(33)
American Airlines, Inc. [Member] | Actuarial Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications out of AOCI	$ 24	$ 19

Regional Expenses (Detail)

Regional Expenses (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Regional Expenses [Line Items]
Aircraft fuel and related taxes	$ 1,763	$ 1,402
Salaries, wages and benefits	3,017	2,859
Maintenance, materials and repairs	469	492
Other rent and landing fees	462	440
Aircraft rent	304	295
Selling expenses	356	318
Depreciation and amortization	445	405
Special items, net	195	119
Other	1,261	1,180
Total regional expenses	1,698	1,573
Regional Carrier [Member]
Regional Expenses [Line Items]
Aircraft fuel and related taxes	398	318
Salaries, wages and benefits	383	345
Capacity purchases from third-party regional carriers	354	393
Maintenance, materials and repairs	80	69
Other rent and landing fees	147	152
Aircraft rent	9	9
Selling expenses	85	80
Depreciation and amortization	82	79
Special items, net	0	2
Other	160	126
Total regional expenses	1,698	1,573
American Airlines, Inc. [Member]
Regional Expenses [Line Items]
Aircraft fuel and related taxes	1,763	1,402
Salaries, wages and benefits	3,014	2,857
Maintenance, materials and repairs	469	492
Other rent and landing fees	462	440
Aircraft rent	304	295
Selling expenses	356	318
Depreciation and amortization	445	405
Special items, net	195	119
Other	1,261	1,180
Total regional expenses	1,682	1,569
American Airlines, Inc. [Member] | Regional Carrier [Member]
Regional Expenses [Line Items]
Aircraft fuel and related taxes	398	318
Salaries, wages and benefits	82	75
Capacity purchases from third-party regional carriers	798	801
Maintenance, materials and repairs	2	1
Other rent and landing fees	141	146
Aircraft rent	7	7
Selling expenses	85	80
Depreciation and amortization	68	64
Special items, net	0	2
Other	101	75
Total regional expenses	$ 1,682	$ 1,569

Transactions with Related Par55

Transactions with Related Parties (Detail) - American Airlines, Inc. [Member] - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Related Party Transaction [Line Items]
Net receivables (payables) to related parties	$ 9,405	$ 8,822
AAG [Member]
Related Party Transaction [Line Items]
Net receivables (payables) to related parties	11,540	10,968
AAG's Wholly-owned Subsidiaries [Member]
Related Party Transaction [Line Items]
Net receivables (payables) to related parties	$ (2,135)	$ (2,146)

Legal Proceedings - Additional

Legal Proceedings - Additional Information (Detail) shares in Millions	1 Months Ended
	Jun. 30, 2015Lawsuits	Mar. 31, 2018shares
Long-term Purchase Commitment [Line Items]
Shares reserved for future issuance (in shares) | shares		24.5
Number of putative class action lawsuits	100
American Airlines, Inc. [Member]
Long-term Purchase Commitment [Line Items]
Number of putative class action lawsuits	100

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail)	1 Months Ended	3 Months Ended
	Apr. 26, 2018USD ($)Aircraft$ / shares	Mar. 31, 2018USD ($)$ / shares	Mar. 31, 2017$ / shares
Subsequent Event [Line Items]
Stock repurchase programs, authorized amount | $		$ 11,000,000,000
Common stock dividends per share declared (in dollars per share) | $ / shares		$ 0.1	$ 0.1
Subsequent Event [Member]
Subsequent Event [Line Items]
Stock repurchase programs, authorized amount | $	$ 2,000,000,000
Common stock dividends per share declared (in dollars per share) | $ / shares	$ 0.10
Subsequent Event [Member] | 787 Aircraft [Member]
Subsequent Event [Line Items]
Number of aircraft acquired	47
Subsequent Event [Member] | 787 Aircraft [Member] | 2026 and 2027 Purchase Option Period [Member]
Subsequent Event [Line Items]
Number of aircraft, option to acquire	14
Subsequent Event [Member] | 787 Aircraft [Member] | 2027 and 2028 Purchase Option Period [Member]
Subsequent Event [Line Items]
Number of aircraft, option to acquire	14
Subsequent Event [Member] | 787-8 Aircraft [Member]
Subsequent Event [Line Items]
Number of aircraft acquired	22
Subsequent Event [Member] | 787-9 Aircraft [Member]
Subsequent Event [Line Items]
Number of aircraft acquired	25
Subsequent Event [Member] | MAX 737 Aircraft [Member]
Subsequent Event [Line Items]
Number of aircraft, deferral of delivery	40
Subsequent Event [Member] | A-350 Aircraft [Member]
Subsequent Event [Line Items]
Number of aircraft, termination of order	22
American Airlines, Inc. [Member] | Subsequent Event [Member] | 787 Aircraft [Member]
Subsequent Event [Line Items]
Number of aircraft acquired	47
American Airlines, Inc. [Member] | Subsequent Event [Member] | 787 Aircraft [Member] | 2026 and 2027 Purchase Option Period [Member]
Subsequent Event [Line Items]
Number of aircraft, option to acquire	14
American Airlines, Inc. [Member] | Subsequent Event [Member] | 787 Aircraft [Member] | 2027 and 2028 Purchase Option Period [Member]
Subsequent Event [Line Items]
Number of aircraft, option to acquire	14
American Airlines, Inc. [Member] | Subsequent Event [Member] | 787-8 Aircraft [Member]
Subsequent Event [Line Items]
Number of aircraft acquired	22
American Airlines, Inc. [Member] | Subsequent Event [Member] | 787-9 Aircraft [Member]
Subsequent Event [Line Items]
Number of aircraft acquired	25
American Airlines, Inc. [Member] | Subsequent Event [Member] | MAX 737 Aircraft [Member]
Subsequent Event [Line Items]
Number of aircraft, deferral of delivery	40
American Airlines, Inc. [Member] | Subsequent Event [Member] | A-350 Aircraft [Member]
Subsequent Event [Line Items]
Number of aircraft, termination of order	22