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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, 2011
Dec. 31, 2010
Dec. 31, 2011
Parent Company [Member]
Dec. 31, 2010
Parent Company [Member]
Dec. 31, 2011
Subordinated Convertible Notes Due 2029 [Member]
Dec. 31, 2010
Subordinated Convertible Notes Due 2029 [Member]
Parent Company [Member]
Dec. 31, 2011
1.00% Senior Convertible Notes Due 2012 [Member]
Sep. 30, 2007
1.00% Senior Convertible Notes Due 2012 [Member]
Dec. 31, 2010
1.00% Senior Convertible Notes Due 2012 [Member]
Parent Company [Member]
Dec. 31, 2011
0.875% Convertible Notes Due 2013 [Member]
Jul. 22, 2011
0.875% Convertible Notes Due 2013 [Member]
Dec. 31, 2010
0.875% Convertible Notes Due 2013 [Member]
Parent Company [Member]
Dec. 31, 2011
7.125% Senior Notes Due 2017 [Member]
Dec. 31, 2010
7.125% Senior Notes Due 2017 [Member]
Dec. 31, 2010
7.125% Senior Notes Due 2017 [Member]
Parent Company [Member]
Dec. 31, 2011
Senior Floating Rate Notes [Member]
Parent Company [Member]
Dec. 31, 2010
Senior Floating Rate Notes [Member]
Parent Company [Member]
Dec. 31, 2010
Other Debt [Member]
Parent Company [Member]
Dec. 31, 2011
North America [Member]
Subordinated Convertible Notes Due 2029 [Member]
Parent Company [Member]
Dec. 31, 2010
North America [Member]
Subordinated Convertible Notes Due 2029 [Member]
Parent Company [Member]
Dec. 15, 2009
North America [Member]
Subordinated Convertible Notes Due 2029 [Member]
Parent Company [Member]
Dec. 31, 2011
North America [Member]
1.00% Senior Convertible Notes Due 2012 [Member]
Parent Company [Member]
Dec. 31, 2010
North America [Member]
1.00% Senior Convertible Notes Due 2012 [Member]
Parent Company [Member]
Dec. 15, 2009
North America [Member]
1.00% Senior Convertible Notes Due 2012 [Member]
Parent Company [Member]
Dec. 31, 2011
North America [Member]
0.875% Convertible Notes Due 2013 [Member]
Parent Company [Member]
Dec. 31, 2010
North America [Member]
0.875% Convertible Notes Due 2013 [Member]
Parent Company [Member]
Nov. 30, 2006
North America [Member]
0.875% Convertible Notes Due 2013 [Member]
Parent Company [Member]
Dec. 31, 2011
North America [Member]
7.125% Senior Notes Due 2017 [Member]
Parent Company [Member]
Dec. 31, 2011
North America [Member]
Senior Floating Rate Notes [Member]
Parent Company [Member]
Dec. 31, 2010
North America [Member]
Senior Floating Rate Notes [Member]
Parent Company [Member]
Dec. 31, 2011
North America [Member]
Other Debt [Member]
Parent Company [Member]
Dec. 31, 2010
North America [Member]
Other Debt [Member]
Parent Company [Member]
Debt principal amount           $ 429.5   $ 475.0 $ 10.6   $ 355.0 $ 355.0 $ 200.0 $ 200.0 $ 200.0 $ 125.0 $ 125.0   $ 429.5 $ 429.5 $ 429.5 $ 10.6 $ 10.6 $ 10.6 $ 355.0 $ 355.0 $ 355.0 $ 200.0        
Debt discount           (265.6)     (1.1)     (59.5)             (264.4) (265.6)   (0.5) (1.1)   (40.6) (59.5)            
Total debt 1,048.9 985.5 823.6 802.9 429.5   10.6     355.0     200.0 200.0       9.0 429.5 429.5   10.6 10.6   355.0 355.0     125.0 125.0 9.0 9.0
Current portion of long-term debt 156.3 [1] 121.0 [1] 10.1 0                                                        
Long-term debt 892.6 [1] 864.5 [1] 813.5 802.9                                                        
Long-term Debt of Registrant, Maturities, Repayments of Principal, Fiscal Year Maturity [Abstract]                                                                
Debt maturities 2012     10.1                                                          
Debt maturities 2013     314.4                                                          
Debt maturities 2014     0                                                          
Debt maturities 2015     125.0                                                          
Debt maturities 2016     $ 0                                                          
[1] See Note 22 -Restatement of Consolidated Financial Statements