Preferred Stock (Tables)

6 Months Ended

Jun. 30, 2012

Preferred Stock [Abstract]

Number of shares issued and outstanding and carrying amount of preferred stock

	June 30, 2012								December 31, 2011
(Dollars in Millions)	Shares Issued and Outstanding		Liquidation Preference		Discount		Carrying Amount		Shares Issued and Outstanding		Liquidation Preference		Discount		Carrying Amount
Series A		12,510	$	1,251	$	145	$	1,106		12,510	$	1,251	$	145	$	1,106
Series B		40,000		1,000		—		1,000		40,000		1,000		—		1,000
Series D		20,000		500		—		500		20,000		500		—		500
Series F		44,000		1,100		12		1,088		—		—		—		—
Series G		43,400		1,085		10		1,075		—		—		—		—
Total preferred stock (a)		159,910	$	4,936	$	167	$	4,769		72,510	$	2,751	$	145	$	2,606

(a) The par value of all shares issued and outstanding at June 30, 2012 and December 31, 2011, was $1.00 per share.