Earnings (Loss) Per Share (EPS Calculation) (Details) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income (loss)	$ 480		$ (341)
Weighted-average shares outstanding (shares)	723,971		249,491
Basic EPS (usd per share)	$ 0.66		$ (1.37)
Change in fair value of conversion feature on 7.25% convertible senior notes	5	[1]	0	[1]
Net income (loss) for purposes of computing diluted EPS	$ 485		$ (341)
Assumed conversion of 7.25% convertible senior notes (shares)	3,830	[1]	0	[1]
Weighted average common shares outstanding - as adjusted (shares)	741,335		249,491
Diluted EPS (usd per share)	$ 0.65		$ (1.37)
Convertible Debt Securities [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Stock options, SARs and RSUs because inclusion would be antidilutive (shares)	0		34,581
Stock Compensation Plan [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Stock options, SARs and RSUs because inclusion would be antidilutive (shares)	33		20,010
Stock Compensation Awards [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Dilutive effect of stock awards (shares)	13,534		0

[1] In March 2014, the Company notified the holders of US Airways Group's 7.25% convertible senior notes that it has elected to settle all future conversions solely in cash instead of shares of AAG Common Stock in accordance with the related indenture. Thus, the diluted shares include the weighted average impact of the 7.25% convertible senior notes only for the period from January 1, 2014 to March 12, 2014. In addition, under GAAP, the Company must adjust the numerator for purposes of calculating diluted earnings per share by the change in fair value of the conversion feature from March 12, 2014 to March 31, 2014, which increased GAAP net income for purposes of computing diluted earnings per share by $5 million.