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Employee Benefit Plans (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended 3 Months Ended
Sep. 28, 2012
Sep. 30, 2011
Sep. 28, 2012
Sep. 30, 2011
Jun. 29, 2012
UNITED KINGDOM [Member]
Defined Benefit Plan Disclosure [Line Items]          
Defined benefit pension plan cash contributions $ 1.7 $ 16.0 $ 5.2 $ 22.0  
Pre-tax non-cash settlement loss         6.1
Net defined contribution plan expense recognized $ 2.3 $ 2.1 $ 7.4 $ 6.9