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Acquisitions - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
May 31, 2012
Kangaroo Brands' Pita Chip
Nov. 27, 2011
ATFL
May 31, 2012
Odom's Tennessee Pride
Aug. 21, 2012
PF Changs and Bertolli Brands Frozen Meal Business
Mar. 31, 2012
Del Monte Canada
Nov. 30, 2011
National pretzel company
Trust Expenses [Line Items]            
Cash paid to acquire the entity $ 47.9 $ 4.9   $ 266.9    
Purchase price allocated to goodwill 20.4 130.3 30.1 168.1 37.8 178.5
Annual sales       300    
Purchase price allocated to brands, trademarks and other intangibles 20.8   34.7   86.9 68.2
Cash paid to acquire assets and assumed liabilities     96.6   185.6 301.9
Purchase price allocated to trademarks   $ 42.2        
Percentage of interest acquired   52.00%        
Percentage of non-controlling interest under the equity method   48.00%