Income Taxes (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Oct. 02, 2011	Sep. 30, 2012	Oct. 02, 2011
Income Taxes (Textual) [Abstract]
Effective income tax rate	24.50%	30.90%	28.40%	33.50%
Tax benefits related to the remeasurement of uncertain tax positions	$ 3.1	$ 2.4	$ 4.3	$ 2.4
Expected decrease in unrecognized tax benefits over next 12 months	$ 12.4		$ 12.4
Effective income tax rate reconciliation, excluding tax credits	30.00%	35.40%	31.00%	35.00%