Commitments and Contingencies (Narrative 1) (Details)	12 Months Ended
	Dec. 31, 2012
Percentage Of Employees Represented By Unions Under Collective Bargaining Agreements	15.00%
All Employees [Member]
Entity Number of Employees	74,000
Delta Pilots [Member]
Date Which Collective Bargaining Agreement Becomes Amendable	Dec. 31, 2015
Entity Number of Employees	10,700
Date Which Collective Bargaining Agreement Took Effect	Jul. 01, 2012
Refinery Employees [Member]
Entity Number of Employees	220