Subsequent Events (Conversions of Stock) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	0 Months Ended
	Mar. 31, 2014 Common Stock [Member]	Apr. 08, 2014 Subsequent Event [Member]	Apr. 03, 2014 Subsequent Event [Member]	Apr. 03, 2014 Subsequent Event [Member]	Apr. 08, 2014 Subsequent Event [Member]	Apr. 08, 2014 Subsequent Event [Member] Series A Convertible Preferred [Member]	Apr. 08, 2014 Subsequent Event [Member] Series A Convertible Preferred [Member]	Apr. 08, 2014 Subsequent Event [Member] Preferred Stock [Member]	Apr. 03, 2014 Subsequent Event [Member] Preferred Stock [Member]	Apr. 03, 2014 Subsequent Event [Member] Preferred Stock [Member]	Apr. 08, 2014 Subsequent Event [Member] Preferred Stock [Member]	Apr. 08, 2014 Subsequent Event [Member] Common Stock [Member]	Apr. 03, 2014 Subsequent Event [Member] Common Stock [Member]	Apr. 03, 2014 Subsequent Event [Member] Common Stock [Member]
Conversion of Stock [Line Items]
Shares converted (shares)		(17,230,000)	(294,000)	(30,000)	(17,554,000)			(17,230,000)	(294,000)	(30,000)	(17,554,000)
Increase (decrease) in AAG common shares outstanding (shares)	118,000,000	141,000,000				142,756,000	13,252,000					13,007,000	222,000	23,000
Reserve for disputed claims		$ 335			$ 335
Stock issued per $1,000 in claims (shares)		30.7553			30.7553
Single-dip distribution (shares)						48,219,000
Labor distribution (shares)						8,902,000
Legacy AAMRQ holders (shares)						72,383,000