XML 129 R106.htm IDEA: XBRL DOCUMENT v3.6.0.2
Pension and Other Postretirement Benefit Plans - Plan Asset Allocations (Details) - USD ($)
shares in Millions, $ in Millions
12 Months Ended
Jan. 17, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]        
Employer Contributions   $ 0.0 $ 0.0 $ 19.5
Pension [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]        
Actual Plan Asset Allocations   100.00% 100.00%  
Employer Stock Included in Equity Securities (Shares)   0.0 0.0  
Employer Contributions       $ 19.5
Plan Asset Target Allocations   100.00%    
Pension [Member] | Equity Securities [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]        
Actual Plan Asset Allocations   49.00% 47.00%  
Plan Asset Target Allocations   56.00%    
Pension [Member] | Debt Securities [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]        
Actual Plan Asset Allocations   39.00% 39.00%  
Plan Asset Target Allocations   35.00%    
Pension [Member] | Private Equity [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]        
Actual Plan Asset Allocations   7.00% 8.00%  
Pension [Member] | Real Estate [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]        
Actual Plan Asset Allocations   5.00% 6.00%  
Plan Asset Target Allocations   9.00%    
Postretirement Health and Life [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]        
Actual Plan Asset Allocations [1]   100.00% 100.00%  
Plan Asset Target Allocations [2]   100.00%    
Postretirement Health and Life [Member] | Equity Securities [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]        
Actual Plan Asset Allocations [1]   60.00% 57.00%  
Plan Asset Target Allocations [2]   60.00%    
Postretirement Health and Life [Member] | Debt Securities [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]        
Actual Plan Asset Allocations [1]   34.00% 35.00%  
Plan Asset Target Allocations [2]   37.00%    
Postretirement Health and Life [Member] | Private Equity [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]        
Actual Plan Asset Allocations [1]   6.00% 8.00%  
Postretirement Health and Life [Member] | Real Estate [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]        
Actual Plan Asset Allocations [1]   0.00% 0.00%  
Plan Asset Target Allocations [2]   3.00%    
Subsequent Event [Member] | Pension [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]        
Employer Contributions (Shares) 0.2      
Employer Contributions $ 13.5      
[1] Includes VEBAs and irrevocable grantor trusts.
[2] Includes VEBAs and irrevocable grantor trusts.