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Business Combinations - Purchase Price Consideration (Detail) (USD $)
Sep. 29, 2012
Sep. 24, 2011
Sep. 25, 2010
Aug. 01, 2012
GEN-PROBE INCORPORATED [Member]
Jan. 06, 2011
Interlace Medical, Inc [Member]
Aug. 05, 2010
Sentinelle Medical Inc. [Member]
Schedule Of Business Acquisitions Purchase Price Allocation [Line Items]            
Cash paid       $ 3,967,866,000 $ 126,798,000 $ 84,751,000
Deferred payment       1,655,000    
Contingent consideration   86,600,000 29,500,000   86,600,000 29,500,000
Fair value of stock options exchanged 2,655,000     2,655,000    
Total purchase price       $ 3,972,176,000 $ 213,398,000 $ 114,251,000