Preferred Stock (Tables)

3 Months Ended

Mar. 31, 2012

Preferred Stock [Abstract]

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

	March 31, 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		—		—		—		—
Total preferred stock (a)		116,510	$	3,851	$	157	$	3,694		72,510	$	2,751	$	145	$	2,606

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