Annual report pursuant to Section 13 and 15(d)

Debt (Details)

v2.4.0.6
Debt (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 29, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Oct. 01, 2011
Jul. 02, 2011
Apr. 02, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2012
Senior Notes Due 2016 [Member]
Dec. 31, 2011
Senior Notes Due 2016 [Member]
Dec. 31, 2012
Senior Notes Due 2013 [Member]
Dec. 31, 2011
Senior Notes Due 2013 [Member]
Dec. 31, 2012
Notes Due 2027 [Member]
Dec. 31, 2011
Notes Due 2027 [Member]
Dec. 31, 2012
Debentures Due 2023 [Member]
Dec. 31, 2011
Debentures Due 2023 [Member]
Mar. 31, 2011
Secured Asset-Based Facility [Member]
Dec. 31, 2012
Secured Asset-Based Facility [Member]
Apr. 02, 2011
Terminated Secured Asset-Based Facility [Member]
Dec. 31, 2012
Senior Notes Due 2016 [Member]
Dec. 31, 2011
Senior Notes Due 2016 [Member]
Dec. 31, 2012
Notes Due 2027 [Member]
Dec. 31, 2011
Notes Due 2027 [Member]
Dec. 31, 2012
Debentures Due 2023 [Member]
Dec. 31, 2011
Debentures Due 2023 [Member]
Dec. 31, 2012
Senior Notes Due 2013 [Member]
Dec. 31, 2011
Senior Notes Due 2013 [Member]
Dec. 31, 2012
Loan With Fond Du Lac County Economic Development Corporation Due 2021 [Member]
Dec. 31, 2012
Loan With Fond Du Lac County Economic Development Corporation Due 2021 [Member]
Dec. 31, 2011
Loan With Fond Du Lac County Economic Development Corporation Due 2021 [Member]
Dec. 31, 2012
Notes Payable Through 2022 [Member]
Dec. 31, 2011
Notes Payable Through 2022 [Member]
Dec. 31, 2012
Minimum [Member]
Secured Asset-Based Facility [Member]
Dec. 31, 2012
Maximum [Member]
Secured Asset-Based Facility [Member]
Dec. 31, 2012
Maximum [Member]
Loan With Fond Du Lac County Economic Development Corporation Due 2021 [Member]
Short-term debt [Abstract]                                                                            
Current maturities of long-term debt $ (6.5)       $ (1.5)       $ (6.5) $ (1.5)                                                        
Other short-term debt 1.7       0.9       1.7 0.9                                                        
Total short-term debt 8.2       2.4       8.2 2.4                                                        
Asset-Based Credit Facility [Abstract]                                                                            
Term of credit facility                                       5 years                                    
Maximum borrowing capacity                                         300.0 400.0                                
Borrowing base                                         297.1                                  
Available borrowing capacity                                         272.8                                  
Letters of credit outstanding                                         24.3                                  
Maximum amount of letters of credit allowed                                         125.0                                  
Facility fee                                         0.25%                             0.25% 0.625%  
LIBOR borrowing spread                                         2.25%                             2.25% 3.00%  
Leverage ratio spread                                         1.25%                             1.25% 2.00%  
Basis spread on Federal Funds Rate                                         0.50%                                  
Basis spread on one-month LIBOR                                         1.00%                                  
Fixed charge coverage ratio covenant                                         1.0                                  
Minimum remaining borrowing capacity covenant 37.5               37.5                       37.5                                  
Write-off of deferred debt issuance costs                                           1.1                                
Long-term Debt [Abstract]                                                                            
Long-term debt, gross 570.1       691.9       570.1 691.9                         245.7 287.9 166.0 167.2 108.4 114.4 0 73.0 41.1 41.1 42.7 8.9 6.7      
Current maturities of long-term debt (6.5)       (1.5)       (6.5) (1.5)                                                        
Long-term debt, net 563.6       690.4       563.6 690.4                                                        
Interest rate                                             11.25%   7.125%   7.375%   11.25%   2.00% 2.00%            
Interest rate, maximum                                                                   5.892%        
Due date                                             2016   2027   2023   2013     2021   2022        
Discount on long-term debt                                             4.1 5.9 0.6 0.6 0.3 0.3     6.6 6.6 7.3          
Maturities of Long-term Debt [Abstract]                                                                            
2013 6.5               6.5                                                          
2014 6.1               6.1                                                          
2015 5.5               5.5                                                          
2016 251.2               251.2                                                          
2017 5.6               5.6                                                          
Thereafter 295.2               295.2                                                          
Total long-term debt including current maturities 570.1       691.9       570.1 691.9                         245.7 287.9 166.0 167.2 108.4 114.4 0 73.0 41.1 41.1 42.7 8.9 6.7      
Deferred Interest on long term debt                                                             2.7              
Annual forgiveness percent                                                               34.00%           43.00%
Total loan forgiveness                                                               1.7            
Extinguishment of Debt [Abstract]                                                                            
Long-term debt repurchased                 124.2 142.8   44.0 56.2 73.0 44.2 1.2 32.1 6.0 10.3                                      
Loss on early extinguishment of debt $ 4.4 $ 7.5 $ 4.4 $ 0 $ 2.9 $ 11.7 $ 0.9 $ 4.3 $ 16.3 $ 19.8 $ 5.7