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Supplemental Guarantor And Parent Company Condensed Financial Information (Parent Company Long-Term Financing Arrangements) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Parent Company [Member]
Dec. 31, 2011
Parent Company [Member]
Dec. 31, 2012
North America [Member]
Parent Company [Member]
Dec. 31, 2011
North America [Member]
Parent Company [Member]
Dec. 31, 2012
North America [Member]
5.75% Senior Notes due 2022 [Member]
Dec. 31, 2012
North America [Member]
5.75% Senior Notes due 2022 [Member]
Parent Company [Member]
Dec. 31, 2011
North America [Member]
5.75% Senior Notes due 2022 [Member]
Parent Company [Member]
Dec. 31, 2012
North America [Member]
Subordinated Convertible Notes Due 2029 [Member]
Dec. 31, 2011
North America [Member]
Subordinated Convertible Notes Due 2029 [Member]
Dec. 15, 2009
North America [Member]
Subordinated Convertible Notes Due 2029 [Member]
Dec. 31, 2012
North America [Member]
Subordinated Convertible Notes Due 2029 [Member]
Parent Company [Member]
Dec. 31, 2011
North America [Member]
Subordinated Convertible Notes Due 2029 [Member]
Parent Company [Member]
Dec. 31, 2012
North America [Member]
1.00% Senior Convertible Notes Due 2012 [Member]
Dec. 31, 2011
North America [Member]
1.00% Senior Convertible Notes Due 2012 [Member]
Dec. 15, 2009
North America [Member]
1.00% Senior Convertible Notes Due 2012 [Member]
Sep. 30, 2007
North America [Member]
1.00% Senior Convertible Notes Due 2012 [Member]
Dec. 31, 2012
North America [Member]
1.00% Senior Convertible Notes Due 2012 [Member]
Parent Company [Member]
Dec. 31, 2011
North America [Member]
1.00% Senior Convertible Notes Due 2012 [Member]
Parent Company [Member]
Dec. 31, 2012
North America [Member]
0.875% Convertible Notes Due 2013 [Member]
Dec. 31, 2011
North America [Member]
0.875% Convertible Notes Due 2013 [Member]
Nov. 30, 2006
North America [Member]
0.875% Convertible Notes Due 2013 [Member]
Dec. 31, 2012
North America [Member]
0.875% Convertible Notes Due 2013 [Member]
Parent Company [Member]
Dec. 31, 2011
North America [Member]
0.875% Convertible Notes Due 2013 [Member]
Parent Company [Member]
Dec. 31, 2012
North America [Member]
7.125% Senior Notes Due 2017 [Member]
Dec. 31, 2011
North America [Member]
7.125% Senior Notes Due 2017 [Member]
Dec. 31, 2012
North America [Member]
7.125% Senior Notes Due 2017 [Member]
Parent Company [Member]
Dec. 31, 2011
North America [Member]
7.125% Senior Notes Due 2017 [Member]
Parent Company [Member]
Dec. 31, 2012
North America [Member]
Senior Floating Rate Notes [Member]
Parent Company [Member]
Dec. 31, 2011
North America [Member]
Senior Floating Rate Notes [Member]
Parent Company [Member]
Dec. 31, 2011
North America [Member]
Other Debt [Member]
Dec. 31, 2012
North America [Member]
Other Debt [Member]
Parent Company [Member]
Dec. 31, 2011
North America [Member]
Other Debt [Member]
Parent Company [Member]
Face value         $ 1,235.1 $ 823.6 $ 600.0 $ 600.0 $ 0 $ 429.5 $ 429.5 $ 162.9 $ 429.5 $ 429.5 $ 0 $ 10.6 $ 389.7 $ 348.2 $ 0 $ 10.6 $ 355.0 $ 355.0 $ 230.9 $ 355.0 $ 355.0 $ 0 $ 200.0 $ 0 $ 200.0 $ 125.0 $ 125.0 $ 9.0 $ 9.0 $ 9.0
Debt discount                   (263.0) (264.4) (266.6) (263.0) (264.4) 0 (0.5) (74.7) (126.8) 0 (0.5) (20.4) (40.6) (124.1) (20.4) (40.6)                  
Current portion of long-term debt 511.2 156.3 334.6 10.1 334.6 10.1                                                        
Long-term debt 938.9 892.6 900.5 813.5 900.5 813.5                                                        
Long-term Debt of Registrant, Maturities, Repayments of Principal, Fiscal Year Maturity [Abstract]                                                                    
Debt maturities 2013     334.6                                                              
Debt maturities 2014     0                                                              
Debt maturities 2015     125.0                                                              
Debt maturities 2016     0                                                              
Debt maturities 2017     $ 0