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Intangible Assets- Additional Information (Detail) (Discounted Cash Flows Approach, USD $)
In Millions, unless otherwise specified
9 Months Ended
Sep. 30, 2012
Oct. 01, 2012
Future Period
Minimum
Oct. 01, 2012
Future Period
Maximum
Indefinite-lived Intangible Assets [Line Items]      
Indefinite-lived intangible assets impairment, discount rate   12.50% 14.00%
Indefinite-lived intangible assets impairment, growth rate   2.00% 4.00%
Decrease in carrying value of trade name $ 1.1