v2.4.0.6
Other Intangible Assets (Detail) (USD $)
In Millions, unless otherwise specified
Jul. 28, 2012
Jul. 30, 2011
Intangible Assets by Major Class [Line Items]    
Intangible assets subject to amortization, Gross Carrying Amount $ 14.5 $ 10.3
Total intangible assets, Gross Carrying Amount 460.5 189.8
Intangible assets subject to amortization, Accumulated Amortization (6.8) (5.6)
Intangible assets subject to amortization, Net 7.7 4.7
Total intangible assets, Net 453.7 184.2
Intangible assets not subject to amortization, Net 446.0 179.5
Proprietary Technology
    
Intangible Assets by Major Class [Line Items]    
Intangible assets subject to amortization, Gross Carrying Amount 6.5 6.5
Intangible assets subject to amortization, Accumulated Amortization (4.0) (3.1)
Intangible assets subject to amortization, Net 2.5 3.4
Customer Relationships
    
Intangible Assets by Major Class [Line Items]    
Intangible assets subject to amortization, Gross Carrying Amount 2.7 2.2
Intangible assets subject to amortization, Accumulated Amortization (2.2) (2.1)
Intangible assets subject to amortization, Net 0.5 0.1
Trade names
    
Intangible Assets by Major Class [Line Items]    
Intangible assets subject to amortization, Gross Carrying Amount 5.3 1.6
Intangible assets subject to amortization, Accumulated Amortization (0.6) (0.4)
Intangible assets subject to amortization, Net 4.7 1.2
Brands and trademarks
    
Intangible Assets by Major Class [Line Items]    
Intangible assets not subject to amortization, Net 435.1 168.6
Franchise Rights
    
Intangible Assets by Major Class [Line Items]    
Intangible assets not subject to amortization, Net $ 10.9 $ 10.9