Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Assets and Liabilities Recorded at Fair Value (Parenthetical) (Detail)

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Fair Value Measurements - Assets and Liabilities Recorded at Fair Value (Parenthetical) (Detail) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Cash Flow Swaps Designated as Hedges [Member]
   
Derivatives, Fair Value [Line Items]    
Amount included in other accrued liabilities $ 10.2 $ 11.4
Amount included in other long-term liabilities 10.9 20.0
Cash Flow Swaps Not Designated as Hedges [Member]
   
Derivatives, Fair Value [Line Items]    
Amount included in other accrued liabilities 1.3 0.7
Amount included in other long-term liabilities $ 0.9 $ 2.2