Earnings (Loss) Per Share, Potentially Dilutive Stock (Details) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Common stock equivalents [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	0		1.4	[1]	1.5	[1]
Stock options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	3.1	[2]	5.6	[2]	4.8	[2]

[1] For the years ended December 31, 2010 and 2009, common stock equivalents, including stock options, were excluded as a result of the net loss reported during the period.

[2] Common stock options presented above were excluded as the exercise prices were greater than the average market price of the common stock during each respective reporting period.