Earnings (Loss) Per Common Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Loss Per Common Share [Abstract]
Weighted Average Number of Shares Outstanding, Basic	450.6	451.4	450.2	443.8
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	6.3	4.2	6.2	4.0
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Preferred Stock				12.4
Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants	11.0	33.4	16.9	32.6
Weighted Average Number of Shares Outstanding, Diluted	467.9	489.0	473.3	492.8
Basic
Income from continuing operations, net of tax, available to common shareholders	$ 0.33	$ 0.52	$ 1.37	$ 1.05
Income (loss) from discontinued operations, net of tax	$ (1.37)	$ (0.94)	$ (1.31)	$ (2.04)
Net income (loss) available to common shareholders	$ (1.04)	$ (0.42)	$ 0.06	$ (0.99)
Diluted
Income from continuing operations, net of tax, available to common shareholders	$ 0.32	$ 0.48	$ 1.30	$ 0.97
Income (loss) from discontinued operations, net of tax	$ (1.32)	$ (0.87)	$ (1.24)	$ (1.84)
Net income available to common shareholders	$ (1.00)	$ (0.39)	$ 0.06	$ (0.87)
Reconciliation of Net Income Loss Used in Calculating Basic Earnings Loss Per Common Share [Abstract]
Income (Loss) from Continuing Operations Attributable to Parent	$ 150	$ 233	$ 616	$ 476
Preferred Stock Dividends, Income Statement Impact	0	0	0	10
Income loss from Continuing Operations Net of Tax Available to Common Shareholders	150	233	616	466
Income (Loss) from Continuing Operations Net of Tax Available to Common Stockholders Diluted	150	233	616	476
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	(617)	(423)	(588)	(907)
Reconciliation of Net Income Loss Used in Calculating Diluted Earnings Loss Per Common Share [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(467)	(190)	28	(431)
Preferred Stock Dividends, Income Statement Impact	0	0	0	10
Net Income (Loss) Available to Common Stockholders, Basic	(467)	(190)	28	(441)
Net Income (Loss) Available to Common Stockholders, Diluted	$ (467)	$ (190)	$ 28	$ (431)