XML 20 R39.htm IDEA: XBRL DOCUMENT

Description of the Business and Summary of Significant Accounting Policies (Details 5) (Stock options, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Stock options
Equity Based Compensation
Compensation expense for stock options	$ 14.8	$ 12.5	$ 13.2

Equity-based compensation cost during the period with respect to the award, which will be recognized in income (as well as the total recognized tax benefit) or capitalized as part of the cost of an asset.

+ References+ Details