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Debt - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended
Mar. 26, 2013
Aug. 24, 2012
Dec. 31, 2013
Dec. 31, 2012
Jan. 30, 2013
Prior Senior Secured Credit Facility
Jan. 30, 2013
Line of Credit
Dec. 31, 2013
Line of Credit
Dec. 31, 2013
Line of Credit
Minimum
Dec. 31, 2013
Line of Credit
Maximum
Dec. 31, 2013
Line of Credit
Domestic Subsidiaries
Dec. 31, 2013
Line of Credit
Foreign Subsidiaries
Dec. 31, 2013
Line of Credit
Eurocurrency Rate
Dec. 31, 2013
Line of Credit
Base Rate
Dec. 31, 2013
Other Short-Term Borrowings
Dec. 31, 2012
Other Short-Term Borrowings
Mar. 26, 2013
7.875% Senior Notes due 2018
Aug. 24, 2012
7.875% Senior Notes due 2018
Mar. 26, 2010
7.875% Senior Notes due 2018
Dec. 31, 2013
7.875% Senior Notes due 2018
Dec. 31, 2012
7.875% Senior Notes due 2018
Dec. 31, 2013
7.875% Senior Notes due 2018
Semi Annual Payment, First Payment
Dec. 31, 2013
7.875% Senior Notes due 2018
Semi Annual Payment, Second Payment
Dec. 31, 2013
7.875% Senior Notes due 2018
Prior to March Fifteen Two Thousand Fourteen
Mar. 26, 2013
8.125% Senior Notes due 2020
Aug. 24, 2012
8.125% Senior Notes due 2020
Mar. 26, 2010
8.125% Senior Notes due 2020
Dec. 31, 2013
8.125% Senior Notes due 2020
Dec. 31, 2012
8.125% Senior Notes due 2020
Dec. 31, 2013
8.125% Senior Notes due 2020
Semi Annual Payment, First Payment
Dec. 31, 2013
8.125% Senior Notes due 2020
Semi Annual Payment, Second Payment
Dec. 31, 2013
8.125% Senior Notes due 2020
Prior to March Fifteen Two Thousand Fifteen
Jan. 17, 2013
4.75% Senior Notes due 2023
Dec. 31, 2013
4.75% Senior Notes due 2023
Jan. 17, 2013
4.75% Senior Notes due 2023
Semi Annual Payment, First Payment
Jan. 17, 2013
4.75% Senior Notes due 2023
Semi Annual Payment, Second Payment
Dec. 31, 2013
4.75% Senior Notes due 2023
Prior to January Fifteen Two Thousand Eighteen
Dec. 31, 2013
4.75% Senior Notes due 2023
Prior to January Fifteen Two Thousand Sixteen
Debt Instrument [Line Items]                                                                          
Line of credit facility borrowing capacity         $ 500.0 $ 1,000.0               $ 5.4 $ 6.1                                            
Borrowings outstanding             0             0 0                                            
Long-term debt, aggregate principal amount                                     280               280           500        
Stated coupon rate                                     7.875% 7.875%             8.125% 8.125%         4.75%        
Long-term debt, price                                     99.276%               99.164%                    
Long-term debt, yield to maturity                                     8.00% 8.00%             8.25% 8.25%         4.75%        
Notes, payment terms                                     The 2018 Notes and 2020 Notes were issued on March 26, 2010, and interest on the 2018 Notes and 2020 Notes is payable on March 15 and September 15 of each year.               The 2018 Notes and 2020 Notes were issued on March 26, 2010, and interest on the 2018 Notes and 2020 Notes is payable on March 15 and September 15 of each year.           The 2023 Notes were issued on January 17, 2013, and interest on the 2023 Notes is payable on January 15 and July 15 of each year.        
Notes interest payable date                                         March 15 September 15             March 15 September 15       January 15 July 15    
Notes maturity date                                   Mar. 15, 2018 Mar. 15, 2018 Mar. 15, 2018           Mar. 15, 2020 Mar. 15, 2020 Mar. 15, 2020         Jan. 15, 2023        
Senior notes, redeemable percentage of the aggregate principal amount of the Notes                                             10.00%               10.00%            
Senior unsecured notes, redemption price                                             103.00%               103.00%            
Senior unsecured notes, redemption price                                     101.00%               101.00%                    
Percentage of debt redemption                               10.00% 10.00%             10.00% 10.00%                        
Percentage of debt redemption price 103.00% 103.00%                                                                      
Cash paid for debt redemption 72.1 72.1 72.1 72.1                                                                  
Loss on extinguishment of debt     3.6 3.7                                                                  
Proceeds from issuance of debt                                                               500          
Debt issuance cost                                                               7.4          
Payment for redemption of aggregate principal amount     70                                                                    
Senior notes, redemption description                                                                 Prior to January 15, 2016, the Company may redeem up to 35% of the aggregate principal amount of the 2023 Notes, in an amount not to exceed the amount of net cash proceeds of one or more equity offerings, at a redemption price equal to 104.75% of the aggregate principal amount thereof, plus accrued and unpaid interest to the redemption date, provided that at least 65% of the original aggregate principal amount of the 2023 Notes remains outstanding after the redemption and any such redemption is made within 90 days after the closing of such equity offering. Prior to January 15, 2018, the Company may redeem the 2023 Notes, in whole or in part, at a redemption price equal to 100% of the aggregate principal amount thereof, plus a “make-whole” premium as of, and accrued and unpaid interest to, the redemption date.        
Senior notes, redemption price percentage, make whole premium                                                                       100.00%  
Senior notes, redeemable percentage of the aggregate principal amount of the Notes in equity offerings                                                                         35.00%
Senior unsecured notes, redemption price                                                                         104.75%
Outstanding original aggregate principal amount                                                                         65.00%
Redemption of notes                                                                         90 days
Description of Notes restrictive covenants                                     The indenture governing the 2018 Notes and the 2020 Notes contains restrictive covenants that, among other things, limit the ability of the Company and its subsidiaries to: (i) incur additional debt, (ii) pay dividends and make other restricted payments, (iii) create or permit certain liens, (iv) issue or sell capital stock of the Company’s restricted subsidiaries, (v) use the proceeds from sales of assets and subsidiary stock, (vi) create or permit restrictions on the ability of the Company’s restricted subsidiaries to pay dividends or make other distributions to the Company, (vii) enter into transactions with affiliates, (viii) enter into sale and leaseback transactions and (ix) consolidate or merge or sell all or substantially all of the Company’s assets. The foregoing limitations are subject to exceptions as set forth in the 2018 Notes and the 2020 Notes. In addition, if in the future the 2018 Notes and the 2020 Notes have an investment grade credit rating from both Moody’s Investors Service and Standard & Poor’s Ratings Services and no default has occurred and is continuing, certain of these covenants will, thereafter, no longer apply to the Notes for so long as the 2018 Notes and the 2020 Notes have an investment grade credit rating by both rating agencies. The indenture governing the 2018 Notes and the 2020 Notes also contains customary events of default.               The indenture governing the 2018 Notes and the 2020 Notes contains restrictive covenants that, among other things, limit the ability of the Company and its subsidiaries to: (i) incur additional debt, (ii) pay dividends and make other restricted payments, (iii) create or permit certain liens, (iv) issue or sell capital stock of the Company’s restricted subsidiaries, (v) use the proceeds from sales of assets and subsidiary stock, (vi) create or permit restrictions on the ability of the Company’s restricted subsidiaries to pay dividends or make other distributions to the Company, (vii) enter into transactions with affiliates, (viii) enter into sale and leaseback transactions and (ix) consolidate or merge or sell all or substantially all of the Company’s assets. The foregoing limitations are subject to exceptions as set forth in the 2018 Notes and the 2020 Notes. In addition, if in the future the 2018 Notes and the 2020 Notes have an investment grade credit rating from both Moody’s Investors Service and Standard & Poor’s Ratings Services and no default has occurred and is continuing, certain of these covenants will, thereafter, no longer apply to the Notes for so long as the 2018 Notes and the 2020 Notes have an investment grade credit rating by both rating agencies. The indenture governing the 2018 Notes and the 2020 Notes also contains customary events of default.           Subject to certain exceptions, the indenture governing the 2023 Notes contains restrictive covenants that, among other things, limit the ability of the Company to (i) create or permit certain liens, (ii) enter into sale and leaseback transactions and (iii) consolidate or merge or sell all or substantially all of the Company's assets. The indenture governing the 2023 Notes also provides for customary events of default.        
Compliance with covenants under Notes                                     As of December 31, 2013, the Company was in compliance with all covenants under the indentures governing the Notes.               As of December 31, 2013, the Company was in compliance with all covenants under the indentures governing the Notes.           As of December 31, 2013, the Company was in compliance with all covenants under the indentures governing the Notes.        
Line of credit facility, maturity date           Jan. 30, 2018                                                              
Borrowings under revolving credit facility             518.7                                                            
Repayments under revolving credit facility             $ 518.7                                                            
Minimum interest rate margin                       1.00% 0.00%                                                
Maximum interest rate margin                       2.25% 1.25%                                                
Line of credit facility, interest rate at period end                       1.50% 0.50%                                                
Line of credit facility, facility fee               0.25% 0.50%                                                        
Percentage of stock secured on a first priority basis                   100.00% 65.00%                                                    
Line of credit facility, covenants and restrictions             The revolving credit facility contains various customary representations, warranties and covenants by the Company, including, without limitation, (i) covenants regarding maximum leverage and minimum interest coverage, (ii) limitations on fundamental changes involving the Company or its subsidiaries and (iii) limitations on indebtedness, liens, investments and restricted payments.                                                            
Line of credit facility, compliance with covenants             As of December 31, 2013, the Company was in compliance with all covenants under the agreement governing the revolving credit facility.