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Fair Value Measurements, Level 3 Reconciliation (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jul. 02, 2011
Jun. 30, 2012
Jul. 02, 2011
Contingent Consideration [Member]
       
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Beginning Balance $ 1.4 $ 3.8 $ 1.7 $ 28.7
Additions 2.9 0 2.9  
Payments 0 (0.1) (0.3) (25.1)
Change in fair value included in earnings 0.3 0 0.3  
Currency translation 0 0.1 0 0.2
Ending Balance 4.6 3.8 4.6 3.8
Auction Rate Securities [Member]
       
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Beginning Balance 4.3 4.5 4.3 4.6
Sale of securities 0 (0.2) 0 (0.3)
Total unrealized gains (losses) included in other comprehensive income   0.1   0.1
Ending Balance $ 4.3 $ 4.4 $ 4.3 $ 4.4