Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule Of Fair Value Of The Restricted Stock Awards Granted During The Periods

The following table shows the fair value of any restricted stock awards granted to employees and non-employee directors during the periods indicated:

	Three Months Ended March 31,
	2013			2012
Shares granted:
Employees	448,549			367,936
Non employee directors	—			—
	448,549			367,936
Estimated fair value (in millions):
Employees	$	21.0		$	15.6
Non employee directors	—			—
	$	21.0		$	15.6
Percentage of shares granted expected to be distributed:
Employees	94		%	89		%
Non employee directors	N/A			N/A