Earnings Per Common Share (Schedule Of Basic And Diluted Earnings Per Common Share) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013		Dec. 31, 2012
Earnings Per Share [Abstract]
Net income (loss) from continuing operations	$ 151	$ 293	$ 283	$ 198	$ 79	$ 177	$ 100	$ 60	$ 925	$ 416		$ 1,370
Preferred stock dividends - U.S. Department of Treasury									0	(543)	[1]	(535)
Impact of repurchase of MCP held by U.S. Department of Treasury									0	(240)		0
Preferred stock dividends									(268)	(267)		(267)
Net income (loss) from continuing operations attributable to common shareholders									657	(634)		568
Income (loss) from discontinued operations, net of tax	26	130	40	29	25	(86)	(1,027)	1,033	225	(55)		(174)
Net income (loss) attributable to common shareholders									$ 882	$ (689)		$ 394
Basic weighted-average common shares outstanding									481,154,609	420,166,188		412,600,700
Diluted weighted-average common shares outstanding									481,933,811	420,166,188		412,600,700
Earnings Per Share, Basic [Abstract]
Net income (loss) from continuing operations, Per Basic Share	$ 0.17	$ 0.47	$ 0.45	$ 0.27	$ (0.83)	$ (0.06)	$ (0.24)	$ (0.34)	$ 1.36	$ (1.51)		$ 1.38
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share									$ 0.47	$ (0.13)		$ (0.42)
Net (loss) income, Basic	$ 0.23	$ 0.74	$ 0.54	$ 0.33	$ (0.78)	$ (0.27)	$ (2.73)	$ 2.16	$ 1.83	$ (1.64)		$ 0.96
Earnings Per Share, Diluted [Abstract]
Net income (loss) from continuing operations, Per Diluted Share	$ 0.17	$ 0.47	$ 0.45	$ 0.27	$ (0.83)	$ (0.06)	$ (0.24)	$ (0.34)	$ 1.36	$ (1.51)		$ 1.38
Income (loss) from discontinued operations, net of tax, Diluted									$ 0.47	$ (0.13)		$ (0.42)
Net (loss) income, Diluted	$ 0.23	$ 0.74	$ 0.54	$ 0.33	$ (0.78)	$ (0.27)	$ (2.73)	$ 2.16	$ 1.83	$ (1.64)		$ 0.96
Potential common shares excluded from diluted earnings per share calculation										89,000,000		178,000,000

[1] Includes $8 million of preferred stock dividends paid to the U.S. Department of Treasury related to the period from November 15, 2013 through November 20, 2013.