Frequent Flyer Accounting	3 Months Ended
Mar. 31, 2013
Frequent Flyer Accounting	NOTE 1—FREQUENT FLYER ACCOUNTING Frequent Flyer Awards. The Company revised the estimated selling price of miles as a prospective change in estimate, effective January 1, 2012, based on the price at which the Company sells miles to Star Alliance partners in its reciprocal frequent flyer agreements as the best estimate of the selling price for these miles. Any changes to the composition of Star Alliance airline partners may result in the existing estimated selling price of air transportation miles no longer being representative of the best estimate of the selling price and could result in a change to the amount and method we use to determine the estimated selling price. On February 14, 2013, US Airways announced an agreement to merge with AMR Corporation and its intent to exit Star Alliance as a result of such merger. We are currently evaluating the potential impact of any changes to the estimated selling price of miles as a result of this merger.

NOTE 1—FREQUENT FLYER ACCOUNTING

Frequent Flyer Awards. The Company revised the estimated selling price of miles as a prospective change in estimate, effective January 1, 2012, based on the price at which the Company sells miles to Star Alliance partners in its reciprocal frequent flyer agreements as the best estimate of the selling price for these miles. Any changes to the composition of Star Alliance airline partners may result in the existing estimated selling price of air transportation miles no longer being representative of the best estimate of the selling price and could result in a change to the amount and method we use to determine the estimated selling price. On February 14, 2013, US Airways announced an agreement to merge with AMR Corporation and its intent to exit Star Alliance as a result of such merger. We are currently evaluating the potential impact of any changes to the estimated selling price of miles as a result of this merger.