Mandatorily Convertible Preferred Stock and Bankruptcy Settlement Obligations (Details) (USD $)	0 Months Ended	9 Months Ended	10 Months Ended				0 Months Ended		0 Months Ended	9 Months Ended	10 Months Ended			0 Months Ended
	Dec. 09, 2013	Sep. 30, 2014	Sep. 30, 2014	Dec. 31, 2013	Dec. 09, 2013	Dec. 09, 2013 Series A Preferred Stock [Member]	Jul. 01, 2014 Common Stock [Member]	Sep. 30, 2014 Common Stock [Member]	Dec. 09, 2013 AA [Member]	Sep. 30, 2014 AA [Member]	Sep. 30, 2014 AA [Member]	Dec. 31, 2013 AA [Member]	Dec. 09, 2013 AA [Member]	Jul. 01, 2014 AA [Member] Common Stock [Member]	Sep. 30, 2014 AA [Member] Common Stock [Member]
Mandatorily Convertible Preferred Stock and Other Bankruptcy Settlement Obligations [Line Items]
AAG Series A Preferred Stock		$ 0	$ 0	$ 3,833,000,000
Single-Dip Equity Obligations		183,000,000	183,000,000	1,246,000,000						183,000,000	183,000,000
Single-Dip and Double-Dip Equity Obligations										183,000,000	183,000,000	4,575,000,000
Labor-related deemed claim		56,000,000	56,000,000	849,000,000						56,000,000	56,000,000	849,000,000
Total		239,000,000	239,000,000	5,928,000,000						239,000,000	239,000,000	5,424,000,000
Preferred stock, par or stated value per share (usd per share)					$ 0.01	$ 25
Preferred stock dividends rate per annum (percent)	6.25%
Conversion discount for unsecured creditors receiving AAG Preferred Stock (percent)													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
Dividend rate for single-dip unsecured claims not settled in Preferred Stock (percent)					12.00%
Shares issued per $1,000 in reduction of allowed claims (shares)		30.7553								30.7553
Labor-related deemed claim										1,500,000,000
Value of initial distribution of common stock		981,000,000	981,000,000							981,000,000	981,000,000
Payments for payroll taxes associated with equity distributions to employees	$ 300,000,000		$ 561,000,000						$ 300,000,000		$ 561,000,000
Shares released from restriction and issued (shares)							2,900,000							2,900,000
Shares reserved for future issuance (shares)								27,500,000							27,500,000