XML 73 R63.htm IDEA: XBRL DOCUMENT v2.4.0.8
Fair Value Of Financial Instruments (Schedule Of Carrying Amounts And Estimated Fair Values Of Financial Instruments) (Detail) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Carrying Amount [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash surrender value of life insurance policies $ 12.9 $ 11.9
Carrying Amount [Member] | Senior Notes [Member] | Unsecured Debt [Member] | 4.875% Senior Notes [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Senior notes 400.0 0
Carrying Amount [Member] | Senior Notes [Member] | Unsecured Debt [Member] | 7.625% Senior Notes [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Senior notes 0 150.0
Carrying Amount [Member] | Convertible Debt [Member] | Original 4.0% Notes [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Senior convertible notes 9.6 9.7
Carrying Amount [Member] | Convertible Debt [Member] | Original 4.25% Notes [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Senior convertible notes 3.0 3.0
Carrying Amount [Member] | Convertible Debt [Member] | New 4.0% Notes [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Senior convertible notes 102.3 100.9
Carrying Amount [Member] | Convertible Debt [Member] | New 4.25% Notes [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Senior convertible notes 93.3 92.1
Carrying Amount [Member] | Earn-out Arrangements [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Liabilities 165.9 143.6
Carrying Amount [Member] | Deferred Compensation, Excluding Share-based Payments and Retirement Benefits [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Liabilities 3.9 3.3
Carrying Amount [Member] | Auction Rate Securities [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Auction rate securities 9.3 14.4
Fair Value [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash surrender value of life insurance policies 12.9 11.9
Fair Value [Member] | Senior Notes [Member] | Unsecured Debt [Member] | 4.875% Senior Notes [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Senior notes 381.8 0
Fair Value [Member] | Senior Notes [Member] | Unsecured Debt [Member] | 7.625% Senior Notes [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Senior notes 0 154.9
Fair Value [Member] | Convertible Debt [Member] | Original 4.0% Notes [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Senior convertible notes 20.5 15.9
Fair Value [Member] | Convertible Debt [Member] | Original 4.25% Notes [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Senior convertible notes 6.5 5.1
Fair Value [Member] | Convertible Debt [Member] | New 4.0% Notes [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Senior convertible notes 223.3 173.4
Fair Value [Member] | Convertible Debt [Member] | New 4.25% Notes [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Senior convertible notes 210.3 164.9
Fair Value [Member] | Earn-out Arrangements [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Liabilities 165.9 143.6
Fair Value [Member] | Deferred Compensation, Excluding Share-based Payments and Retirement Benefits [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Liabilities 3.9 3.3
Fair Value [Member] | Auction Rate Securities [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Auction rate securities $ 9.3 $ 14.4