Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Details)

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Fair Value Measurements (Details) (USD $)
In Millions
Jul. 02, 2011
Dec. 31, 2010
Oct. 02, 2010
Jul. 03, 2010
Apr. 03, 2010
Assets Measured At Fair Value On A Nonrecurring Basis:          
Assets measured at fair value on a non-recurring basis $ 0.8 $ 8.5 $ 2.9 $ 2.5 $ 3.5
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
          
Assets:          
Cash equivalents 320.3 353.9      
Short-term investments in marketable securities 5.8 10.8      
Long-term investments in marketable securities 71.0 21.0      
Equity investments 2.1 2.0      
Derivatives 0 0      
Total assets 399.2 387.7      
Liabilities:          
Derivatives 0 0      
Total liabilities measured at fair value 0 0      
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
          
Assets:          
Cash equivalents 0 15.0      
Short-term investments in marketable securities 73.0 73.9      
Long-term investments in marketable securities 0 0      
Equity investments 0 0      
Derivatives 2.9 3.5      
Total assets 75.9 92.4      
Liabilities:          
Derivatives 2.6 3.6      
Total liabilities measured at fair value 2.6 3.6      
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
          
Assets:          
Cash equivalents 0 0      
Short-term investments in marketable securities 0 0      
Long-term investments in marketable securities 0 0      
Equity investments 0 0      
Derivatives 0 0      
Total assets 0 0      
Liabilities:          
Derivatives 0 0      
Total liabilities measured at fair value 0 0      
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
          
Assets:          
Cash equivalents 320.3 368.9      
Short-term investments in marketable securities 78.8 84.7      
Long-term investments in marketable securities 71.0 21.0      
Equity investments 2.1 2.0      
Derivatives 2.9 3.5      
Total assets 475.1 480.1      
Liabilities:          
Derivatives 2.6 3.6      
Total liabilities measured at fair value 2.6 3.6      
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
          
Assets Measured At Fair Value On A Nonrecurring Basis:          
Assets measured at fair value on a non-recurring basis   $ 17.4