Mandatorily Convertible Preferred Stock and Bankruptcy Settlement Obligations (Details) (USD $)	0 Months Ended	6 Months Ended	7 Months Ended					0 Months Ended		0 Months Ended		0 Months Ended	4 Months Ended	6 Months Ended				0 Months Ended
	Dec. 09, 2013	Jun. 30, 2014	Jun. 30, 2014	Dec. 31, 2013	Dec. 09, 2013	Dec. 09, 2013 Series A Preferred Stock [Member]	Jun. 30, 2014 Common Stock [Member]	Jul. 01, 2014 Subsequent Event [Member] Preferred Class A [Member]	Jul. 01, 2014 Subsequent Event [Member] Preferred Class A [Member]	Jul. 01, 2014 Subsequent Event [Member] Common Stock [Member]	Jul. 01, 2014 Subsequent Event [Member] Common Stock [Member]	Dec. 09, 2013 AA [Member]	Mar. 31, 2014 AA [Member]	Jun. 30, 2014 AA [Member]	Dec. 31, 2013 AA [Member]	Dec. 09, 2013 AA [Member]	Jun. 30, 2014 AA [Member] Common Stock [Member]	Jul. 01, 2014 AA [Member] Subsequent Event [Member] Common Stock [Member]	Jul. 01, 2014 AA [Member] Subsequent Event [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		317,000,000	317,000,000	1,246,000,000										317,000,000
Single-Dip and Double-Dip Equity Obligations														317,000,000	4,575,000,000
Labor-related deemed claim		98,000,000	98,000,000	849,000,000										98,000,000	849,000,000
Total		415,000,000	415,000,000	5,928,000,000										415,000,000	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%
Shares issued per $1,000 in reduction of allowed claims (shares)		30.7553												30.7553
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%
Labor-related deemed claim														1,500,000,000
Value of initial distribution of common stock		961,000,000	961,000,000										961,000,000
Payments for payroll taxes associated with equity distributions to employees	$ 300,000,000		$ 542,000,000									$ 300,000,000	$ 542,000,000
Shares released from restriction and issued (shares)								2,900,000		2,900,000								2,900,000
Shares reserved for future issuance (shares)							30,400,000		30,400,000		30,400,000						30,400,000		30,400,000