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Business Segments - Summary of Certain Key Financial Measures (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 15, 2013
Jun. 16, 2012
Jun. 15, 2013
Jun. 16, 2012
Dec. 29, 2012
Segment Reporting Information [Line Items]          
Revenue $ 587.8 $ 312.7 $ 1,233.7 $ 635.5  
Operating profit 37.0 22.8 88.0 59.8  
Total assets:          
Total assets 2,644.7 892.3 2,644.7 892.3 2,614.4
Goodwill:          
Goodwill 457.8 39.1 457.8 39.1 459.9
Operating Segments [Member] | Lifestyle Group [Member]
          
Segment Reporting Information [Line Items]          
Revenue 255.2 28.5 525.5 60.9  
Operating profit 45.8 5.6 91.9 12.1  
Total assets:          
Total assets 1,458.5 69.3 1,458.5 69.3  
Goodwill:          
Goodwill 347.3 6.6 347.3 6.6  
Operating Segments [Member] | Performance Group [Member]
          
Segment Reporting Information [Line Items]          
Revenue 199.7 149.3 440.2 301.9  
Operating profit 30.5 29.9 81.4 67.8  
Total assets:          
Total assets 514.5 235.1 514.5 235.1  
Goodwill:          
Goodwill 87.0 10.3 87.0 10.3  
Operating Segments [Member] | Heritage Group [Member]
          
Segment Reporting Information [Line Items]          
Revenue 110.6 111.5 229.1 230.7  
Operating profit 16.1 15.6 31.5 32.1  
Total assets:          
Total assets 243.8 214.9 243.8 214.9  
Goodwill:          
Goodwill 23.5 22.2 23.5 22.2  
Intersegment Eliminations [Member] | Other [Member]
          
Segment Reporting Information [Line Items]          
Revenue 22.3 23.4 38.9 42.0  
Operating profit 0.6 0.5 (0.4) (0.7)  
Total assets:          
Total assets 77.1 66.7 77.1 66.7  
Corporate, Non-Segment [Member] | Corporate [Member]
          
Segment Reporting Information [Line Items]          
Operating profit (56.0) (28.8) (116.4) (51.5)  
Total assets:          
Total assets $ 350.8 $ 306.3 $ 350.8 $ 306.3