Stockholders' Equity (Net Earnings Per Share) (Details) (USD $) In Millions, except Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Stockholders' Equity Note [Abstract]
Net Income (Loss) Attributable to Parent	$ (161)	$ 205	$ 8	$ 369
Weighted Average Number of Shares Outstanding, Basic	76.8	76.2	76.7	75.8
Weighted Average Number Diluted Shares Outstanding Adjustment	0	1.5	1.4	1.5
Weighted Average Number of Shares Outstanding, Diluted	76.8	77.7	78.1	77.3
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	3.4	0.8	2.1	1.1