XML 65 R59.htm IDEA: XBRL DOCUMENT v2.4.0.6
Fair Value Of Financial Instruments (Schedule Of Carrying Amounts And Estimated Fair Values Of Financial Instruments) (Detail) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Mar. 31, 2013
Earn-out Arrangements [Member]
Dec. 31, 2012
Earn-out Arrangements [Member]
Mar. 31, 2013
Deferred Compensation, Excluding Share-based Payments and Retirement Benefits [Member]
Dec. 31, 2012
Deferred Compensation, Excluding Share-based Payments and Retirement Benefits [Member]
Mar. 31, 2013
Auction Rate Securities [Member]
Dec. 31, 2012
Auction Rate Securities [Member]
Mar. 31, 2013
Carrying Amount [Member]
Dec. 31, 2012
Carrying Amount [Member]
Mar. 31, 2013
Carrying Amount [Member]
Senior Notes [Member]
Unsecured Debt [Member]
4.875% Senior Notes [Member]
Dec. 02, 2012
Carrying Amount [Member]
Senior Notes [Member]
Unsecured Debt [Member]
4.875% Senior Notes [Member]
Mar. 31, 2013
Carrying Amount [Member]
Senior Notes [Member]
Unsecured Debt [Member]
7.625% Senior Notes [Member]
Dec. 31, 2012
Carrying Amount [Member]
Senior Notes [Member]
Unsecured Debt [Member]
7.625% Senior Notes [Member]
Mar. 31, 2013
Carrying Amount [Member]
Convertible Debt [Member]
Original 4.0% Notes [Member]
Dec. 31, 2012
Carrying Amount [Member]
Convertible Debt [Member]
Original 4.0% Notes [Member]
Mar. 31, 2013
Carrying Amount [Member]
Convertible Debt [Member]
Original 4.25% Notes [Member]
Dec. 31, 2012
Carrying Amount [Member]
Convertible Debt [Member]
Original 4.25% Notes [Member]
Mar. 31, 2013
Carrying Amount [Member]
Convertible Debt [Member]
New 4.0% Notes [Member]
Dec. 31, 2012
Carrying Amount [Member]
Convertible Debt [Member]
New 4.0% Notes [Member]
Mar. 31, 2013
Carrying Amount [Member]
Convertible Debt [Member]
New 4.25% Notes [Member]
Dec. 31, 2012
Carrying Amount [Member]
Convertible Debt [Member]
New 4.25% Notes [Member]
Mar. 31, 2013
Carrying Amount [Member]
Earn-out Arrangements [Member]
Dec. 31, 2012
Carrying Amount [Member]
Earn-out Arrangements [Member]
Mar. 31, 2013
Carrying Amount [Member]
Deferred Compensation, Excluding Share-based Payments and Retirement Benefits [Member]
Dec. 31, 2012
Carrying Amount [Member]
Deferred Compensation, Excluding Share-based Payments and Retirement Benefits [Member]
Mar. 31, 2013
Carrying Amount [Member]
Auction Rate Securities [Member]
Dec. 31, 2012
Carrying Amount [Member]
Auction Rate Securities [Member]
Mar. 31, 2013
Fair Value [Member]
Dec. 31, 2012
Fair Value [Member]
Mar. 31, 2013
Fair Value [Member]
Senior Notes [Member]
Unsecured Debt [Member]
4.875% Senior Notes [Member]
Dec. 02, 2012
Fair Value [Member]
Senior Notes [Member]
Unsecured Debt [Member]
4.875% Senior Notes [Member]
Mar. 31, 2013
Fair Value [Member]
Senior Notes [Member]
Unsecured Debt [Member]
7.625% Senior Notes [Member]
Dec. 31, 2012
Fair Value [Member]
Senior Notes [Member]
Unsecured Debt [Member]
7.625% Senior Notes [Member]
Mar. 31, 2013
Fair Value [Member]
Convertible Debt [Member]
Original 4.0% Notes [Member]
Dec. 31, 2012
Fair Value [Member]
Convertible Debt [Member]
Original 4.0% Notes [Member]
Mar. 31, 2013
Fair Value [Member]
Convertible Debt [Member]
Original 4.25% Notes [Member]
Dec. 31, 2012
Fair Value [Member]
Convertible Debt [Member]
Original 4.25% Notes [Member]
Mar. 31, 2013
Fair Value [Member]
Convertible Debt [Member]
New 4.0% Notes [Member]
Dec. 31, 2012
Fair Value [Member]
Convertible Debt [Member]
New 4.0% Notes [Member]
Mar. 31, 2013
Fair Value [Member]
Convertible Debt [Member]
New 4.25% Notes [Member]
Dec. 31, 2012
Fair Value [Member]
Convertible Debt [Member]
New 4.25% Notes [Member]
Mar. 31, 2013
Fair Value [Member]
Earn-out Arrangements [Member]
Dec. 31, 2012
Fair Value [Member]
Earn-out Arrangements [Member]
Mar. 31, 2013
Fair Value [Member]
Deferred Compensation, Excluding Share-based Payments and Retirement Benefits [Member]
Dec. 31, 2012
Fair Value [Member]
Deferred Compensation, Excluding Share-based Payments and Retirement Benefits [Member]
Mar. 31, 2013
Fair Value [Member]
Auction Rate Securities [Member]
Dec. 31, 2012
Fair Value [Member]
Auction Rate Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                                                                                                
Cash surrender value of life insurance policies $ 12.8 $ 11.9             $ 12.8 $ 11.9                                     $ 12.8 $ 11.9                                    
Auction rate securities             14.8 [1] 14.4 [1]                                     14.8 14.4                                     14.8 14.4
Liabilities measured on a recurring basis     142.6 143.6 3.9 3.3                                 142.6 143.6 3.9 3.3                                 142.6 143.6 3.9 3.3    
Senior notes                     400.0 0 0 150.0                                 397.0 0 0 154.9                            
Senior convertible notes                             $ 9.6 $ 9.7 $ 3.0 $ 3.0 $ 101.6 $ 100.9 $ 92.7 $ 92.1                         $ 18.1 $ 15.9 $ 5.8 $ 5.1 $ 103.4 $ 101.5 $ 94.8 $ 92.7            
[1] The Company’s auction rate securities maintain split ratings. For purposes of this table, securities are categorized according to their lowest rating.