Income Taxes (Incentive Tax Grant) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010	Dec. 31, 2009
Income Taxes [Abstract]
Tax benefit	$ 3.7	[1]	$ 44.6	$ 24.0
Per share benefit	$ 0.04	[1]	$ 0.47	$ 0.24

[1] No tax benefit was recognized from the incentive tax grant in Puerto Rico due to the charge for Hernia Product Claims.