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Unrecognized Tax Benefits (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Sep. 29, 2012
Mar. 31, 2012
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]    
Unrecognized Tax Benefits $ 27.8 $ 34.1
Income Tax Examination, Penalties and Interest Expense 0.4  
Unrecognized Tax Benefits, Decreases Resulting from Acquisition 4.6  
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued $ 10.0 $ 10.0