Mandatorily Convertible Preferred Stock and Other Bankruptcy Settlement Obligations (Details) (USD $)	0 Months Ended	3 Months Ended			3 Months Ended		0 Months Ended								3 Months Ended		3 Months Ended		0 Months Ended	3 Months Ended
	Dec. 09, 2013	Mar. 31, 2014	Dec. 31, 2013	Dec. 09, 2013 Series A Preferred Stock [Member]	Mar. 31, 2014 Preferred Class A [Member]	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] Common Stock [Member]	Apr. 03, 2014 Subsequent Event [Member] Common Stock [Member]	Apr. 03, 2014 Subsequent Event [Member] Common Stock [Member]	Dec. 09, 2013 AA [Member]	Mar. 31, 2014 AA [Member]	Dec. 31, 2013 AA [Member]	Mar. 31, 2014 AA [Member] Series A Preferred Stock [Member]	Mar. 31, 2014 AA [Member] Common Stock [Member]	Apr. 08, 2014 AA [Member] Subsequent Event [Member]	Mar. 31, 2014 Special Items, Net [Member]
Mandatorily Convertible Preferred Stock and Other Bankruptcy Settlement Obligations [Line Items]
AAG Series A Preferred Stock		$ 589,000,000	$ 3,833,000,000
Single-Dip equity obligations		1,259,000,000	1,246,000,000
Single-Dip and Double-Dip equity obligations															1,768,000,000	4,575,000,000
Labor-related deemed claim		474,000,000	849,000,000												474,000,000	849,000,000
Total		2,322,000,000	5,928,000,000												2,242,000,000	5,424,000,000
Preferred stock, par or stated value per share (usd per share)	$ 0.01			$ 25	$ 25
Preferred stock dividends rate per annum (percent)		6.25%
Conversion discount for unsecured creditors receiving AAG Preferred Stock (percent)														3.50%	3.50%
Series A Convertible Preferred Stock, conversion price floor (in usd per share)		$ 10.875
Series A Convertible Preferred Stock, conversion price cap (in usd per share)		$ 33.8080
Shares converted (shares)					140,000,000		17,230,000	294,000	30,000	17,554,000							123,000,000
Optional conversion of AAG Series A Preferred Stock into shares of AAG Common Stock on December 17, 2013 (shares)						118,000,000	141,000,000				13,007,000	222,000	23,000					103,000,000	124,000,000
Decrease in mandatory convertible preferred stock obligation		3,500,000,000													3,000,000,000
Dividend rate for single-dip unsecured claims not settled in Preferred Stock (percent)		12.00%
Labor-related deemed claim															1,500,000,000
Value of initial distribution of common stock		680,000,000													680,000,000
Payments for payroll taxes associated with equity distributions to employees	300,000,000	380,000,000												300,000,000	380,000,000
Decrease in mandatory convertible preferred stock obligation and other bankruptcy settlement obligations															65,000,000					41,000,000
Reserve for disputed claims							$ 335,000,000			$ 335,000,000									$ 335,000,000
Stock issued per $1,000 in claims (shares)							30.7553			30.7553									30.7553