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Employee Benefit Plans (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
 1 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Aug. 31, 2009
Years
Dec. 31, 2012
Jun. 30, 2012
Dec. 31, 2011
Dec. 31, 2012
U.S. Qualified Pension Plan [Member]
Dec. 31, 2011
U.S. Qualified Pension Plan [Member]
Dec. 31, 2012
Personal Savings Account Plan [Member]
Dec. 31, 2011
Personal Savings Account Plan [Member]
Dec. 31, 2010
Personal Savings Account Plan [Member]
Dec. 31, 2012
Pension Benefits U.S. Plans [Member]
Dec. 31, 2011
Pension Benefits U.S. Plans [Member]
Dec. 31, 2010
Pension Benefits U.S. Plans [Member]
Dec. 31, 2012
Pension Benefits Non-U.S. Plans [Member]
Dec. 31, 2011
Pension Benefits Non-U.S. Plans [Member]
Dec. 31, 2010
Pension Benefits Non-U.S. Plans [Member]
Dec. 31, 2012
U.S. Pension and Postretirement Plans [Member]
Dec. 31, 2011
U.S. Pension and Postretirement Plans [Member]
Dec. 31, 2012
International Pension and Postretirement Plans [Member]
Dec. 31, 2012
Corporate and Government Bonds [Member]
Pension Benefits U.S. Plans [Member]
Dec. 31, 2012
Equity Securities and High Yield Securities [Member]
Pension Benefits U.S. Plans [Member]
Maximum employee contribution to plan             25.00%                          
Maximum contribution for eligible participants             3.00%                          
Employer match toward contributions, fifty cents for dollar, minimum             4.00%                          
Employer match toward contributions, fifty cents for dollar, maximum             6.00%                          
Employer contribution             $ 12.2 $ 12.6 $ 12.5                      
Change in plan obligations, due to retiree medical benefits reduction (36.3)                                      
Average future service of active participants, years 12                                      
Change in plan obligations, due to retiree life insurance benefits reduction (27.7)                                      
Remaining term of plan, years 3.3                                      
Qualified pension plans, benefit obligations         728.8 683.5       (792.7) (753.7) (702.6) (838.5) (746.7) (720.3)          
Qualified pension plans, plan assets         529.2 493.4       529.2 493.4 451.7 609.3 536.4 540.6   536.0      
Discount rate   4.11%   4.69%           3.55% 4.10%   4.63% 5.30%            
Rate of return on assets   7.28%               7.75% 8.00% 8.00% 6.85% 7.16% 7.31%          
Corporate and government bonds and mortgage-backed securities                   100.00% 100.00%   100.00% 100.00%            
Assumptions Used Calculating Net Periodic Benefit, Debt Securities Allocation                   35.00%                    
Assumptions Used Calculating Net Periodic Benefit, Equity Securities Allocation                   65.00%                    
Expected long term rate of return on debt securities, minimum                                     2.00%  
Expected long term rate of return on debt securities, maximum                                     4.00%  
Expected long term rate of return on equity securities, minimum                                       6.00%
Expected long term rate of return on equity securities, maximum                                       10.00%
Employer's expected minimum contribution                               55.0   40.0    
Employer's expected maximum contribution                               60.0   45.0    
Assumed health care trend rate   9.65%                                    
Ultimate health care trend rate   5.12%                                    
Year that rate reaches ultimate trend rate   2017                                    
Employee benefit plans liability   52.2   69.5                                
Healtchare Trust Assets     40.0                                  
Healthcare trust assets   $ 26.9   $ 0