Earnings Per Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income (numerator):
Income (Loss) from Continuing Operations Attributable to Parent	$ 279	$ (4)	$ 280	$ 77
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	(1)	31	260	53
Net income (loss)	278	27	540	130
Preferred Stock Dividends and Other Adjustments	0	(20)	0	(20)
Net Income (Loss) Available to Common Stockholders, Basic	278	7	540	110
Weighted average shares (denominator):
Weighted average shares - basic	137	136	137	135
Dilution effect of stock options and unvested restricted stock and restricted stock units outstanding at end of period	1	0	1	1
Weighted average shares - diluted	138	136	138	136
Basic --
Income (Loss) from Continuing Operations, Per Basic Share	$ 2.04	$ (0.03)	$ 2.06	$ 0.57
Income (Loss) from Discontinued Operations, Net of Tax, Before Preferred Share Repurchase, Per Basic Share	$ 0.00	$ 0.23	$ 1.90	$ 0.39
Income (Loss) Attributable to Repurchase of Preferred Shares of Wholly-owned Subsidiary, Per Basic Share	$ 0.00	$ (0.15)	$ 0.00	$ (0.15)
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share	$ 0.00	$ 0.08	$ 1.90	$ 0.24
Earnings (Loss) Per Share, Basic	$ 2.04	$ 0.05	$ 3.96	$ 0.81
Diluted --
Income (Loss) from Continuing Operations, Per Diluted Share	$ 2.02	$ (0.03)	$ 2.04	$ 0.57
Income (Loss) from Discontinued Operations, Net of Tax, Before Preferred Share Repurchase, Per Diluted Share	$ 0.00	$ 0.23	$ 1.88	$ 0.39
Income (Loss) Attributable to Repurchase of Preferred Shares of Wholly-owned Subsidiary, Per Diluted Share	$ 0.00	$ (0.15)	$ 0.00	$ (0.15)
Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share	$ 0.00	$ 0.08	$ 1.88	$ 0.24
Earnings (Loss) Per Share, Diluted	$ 2.02	$ 0.05	$ 3.92	$ 0.81
Earnings Per Share (Textuals) [Abstract]
Incremental shares attributable to the assumed exercise of outstanding stock options and the assumed vesting of unvested restricted stock and restricted stock units	0.3	0.7	1.1	4.1
Payments for Repurchase of Preferred Stock and Preference Stock		$ 20	$ 0	$ 20