Valuation and Qualifying Accounts (Tables)

12 Months Ended

Dec. 31, 2017

Valuation and Qualifying Accounts Disclosure [Line Items]

Components of Valuation and Qualifying Accounts

	Balance at Beginning of Year		Changes Charged to Statement of Operations Accounts		Write-offs (Net of Recoveries)			Sales, Retirements and Transfers			Balance at End of Year
Allowance for obsolescence of spare parts
Year ended December 31, 2017	$	765	$	29	$	(4	)	$	(21	)	$	769
Year ended December 31, 2016	728		37		(3		)	3			765
Year ended December 31, 2015	673		50		(4		)	9			728
Allowance for uncollectible accounts
Year ended December 31, 2017	$	36	$	43	$	(55	)	$	—		$	24
Year ended December 31, 2016	41		47		(52		)	—			36
Year ended December 31, 2015	17		46		(22		)	—			41

American Airlines, Inc. [Member]

Valuation and Qualifying Accounts Disclosure [Line Items]

Components of Valuation and Qualifying Accounts

	Balance at Beginning of Year		Changes Charged to Statement of Operations Accounts		Write-offs (Net of Recoveries)			Sales, Retirements and Transfers			Balance at End of Year
Allowance for obsolescence of spare parts
Year ended December 31, 2017	$	720	$	18	$	—		$	(21	)	$	717
Year ended December 31, 2016	689		28		—			3			720
Year ended December 31, 2015	638		42		—			9			689
Allowance for uncollectible accounts
Year ended December 31, 2017	$	35	$	41	$	(55	)	$	—		$	21
Year ended December 31, 2016	37		47		(49		)	—			35
Year ended December 31, 2015	14		45		(22		)	—			37