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Supplemental ProForma Consolidated Results of Operations (Detail) (Pinnacle Assets, USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Pinnacle Assets
       
Business Acquisition, Pro Forma Information [Line Items]        
Net sales $ 614.7 $ 598.7 $ 1,176.3 $ 1,144.2
Income from continuing operations $ 108.0 $ 61.4 $ 185.4 $ 113.1
Earnings per share - diluted - continuing operations $ 0.67 $ 0.39 $ 1.16 $ 0.72