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Financial Instruments - Information Regarding Swaps (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Derivative [Line Items]    
Notional amount of interest rate derivatives $ 631.4 $ 632.8
Other Assets [Member]
    
Derivative [Line Items]    
Asset 2.8 0
Liability 0 0
Accounts Payable [Member]
    
Derivative [Line Items]    
Asset 0 0
Liability (6.0) (17.1)
Interest Rate Swaps One [Member]
    
Derivative [Line Items]    
Maturity Date Jun. 28, 2014  
Counterparty Pays Variable Rate 1 Month LIBOR  
Fixed Rate 1.00%  
Notional amount of interest rate derivatives 100.0  
Asset 0 0
Liability (0.4) (1.2)
Interest Rate Swaps Two [Member]
    
Derivative [Line Items]    
Maturity Date Jun. 01, 2015  
Counterparty Pays Variable Rate 1 Month LIBOR  
Fixed Rate 0.60%  
Notional amount of interest rate derivatives 50.0  
Asset 0 0
Liability (0.2) (0.3)
Interest Rate Swaps Three [Member]
    
Derivative [Line Items]    
Maturity Date Jul. 01, 2015  
Counterparty Pays Variable Rate 1 Month LIBOR  
Fixed Rate 0.50%  
Notional amount of interest rate derivatives 100.0  
Asset 0 0
Liability (0.4) (0.5)
Interest Rate Swaps Four [Member]
    
Derivative [Line Items]    
Maturity Date Sep. 01, 2017  
Counterparty Pays Variable Rate 1 Month LIBOR  
Fixed Rate 2.80%  
Notional amount of interest rate derivatives 81.4  
Asset 0 0
Liability (5.0) (7.8)
Interest Rate Swaps Five [Member]
    
Derivative [Line Items]    
Maturity Date Jan. 02, 2018  
Counterparty Pays Variable Rate 1 Month LIBOR  
Fixed Rate 0.90%  
Notional amount of interest rate derivatives 100.0  
Asset 1.4 0
Liability 0 (0.7)
Interest Rate Swaps Six [Member]
    
Derivative [Line Items]    
Maturity Date Feb. 01, 2019  
Counterparty Pays Variable Rate 1 Month LIBOR  
Fixed Rate 1.60%  
Notional amount of interest rate derivatives 100.0  
Asset 0.5 0
Liability 0 (3.5)
Interest Rate Swaps Seven [Member]
    
Derivative [Line Items]    
Maturity Date Feb. 01, 2019  
Counterparty Pays Variable Rate 1 Month LIBOR  
Fixed Rate 1.50%  
Notional amount of interest rate derivatives 100.0  
Asset 0.9 0
Liability $ 0 $ (3.1)