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           Accumulated Other Comprehensive Income (Loss) (Parenthetical) (Detail) (Change Related to Cash Flow Hedges, USD $) 
        In Millions, unless otherwise specified  | 
        9 Months Ended | 
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           Sep. 30, 2013 
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           Change Related to Cash Flow Hedges 
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| Accumulated Other Comprehensive Income (Loss) [Line Items] | |
| Amount expected to be reclassified into earnings | $ 1.8 | 
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- Details 
          
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- Definition 
          The estimated value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings. No definition available. 
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