Transactions with Related Parties Transactions with Related Parties(Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Related Party Transaction [Line Items]
Passenger Revenue, Regional	$ 2,914	$ 2,724	$ 2,327
Regional payments to affiliate company	1,142	2,418	2,227
Related Party Transaction, Other Revenues from Transactions with Related Party	16	18	18
AMR Eagle [Member]
Related Party Transaction [Line Items]
Number of Daily Departures	1,500
Number of Destinations in North America	175
Passenger Revenue, Regional	1,200
Selling Expense [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	128	132
Other Operating Expense [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 1,600	$ 350