Consolidated Statements of Changes in Equity (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010		Dec. 31, 2009
Cash dividends declared on common shares, per share	$ 0.10	$ 0.04		$ 0.0925
Scenario, Previously Reported [Member]
Total comprehensive income (loss)		$ 572
Series A Preferred Stock
Cash dividends accrued on Cumulative Series B Preferred Stock, (% per annum)	7.75%	7.75%
Retained Earnings [Member]
Cash dividends declared on common shares, per share	$ 0.10	$ 0.04		$ 0.0925
Amount erroneously shown as a component of Comprehensive Income (Loss)		45	[1]
Retained Earnings [Member] | Series B Preferred Stock
Cash dividends declared on Preferred Stock, per share/annum	$ 7.75	$ 7.75		$ 7.75
Cash dividends accrued on Cumulative Series B Preferred Stock, (% per annum)	5.00%	5.00%		5.00%
Accumulated Other Comprehensive Income (Loss)
Income taxes effect on net unrealized (losses) gains on securities available for sale	46	69		(5)
Income taxes effect on net unrealized (losses) gains on derivative financial instruments	(6)	(63)		(77)
Comprehensive Income (Loss)
Income taxes effect on net unrealized (losses) gains on securities available for sale	46	69		(5)
Income taxes effect on net unrealized (losses) gains on derivative financial instruments	(6)	(63)		(77)
Total comprehensive income (loss)	$ 669	$ 527	[1]	$ (1,334)

[1] The $45 million cumulative effect adjustment on January 1, 2010 was erroneously shown as a component of Comprehensive Income (Loss) and has been removed for financial reporting presentation. Therefore, Total Comprehensive Income (Loss) was previously shown as $572 million and now has been reflected at $527 million for financial reporting presentation purposes.