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