Annual report pursuant to Section 13 and 15(d)

PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Contributions) (Details)

v3.19.3.a.u2
PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Contributions) (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Employer contributions $ 3.7 $ 3.8
Expected employer contributions, next fiscal year $ 3.5  
Defined Benefit Plan, Funded Percentage 70.00%  
Value of VEBA Trust Assets as a Percentage of the Funding Obligation 0.9  
Pension Plan [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Employer contributions $ 16.4 27.6
Expected employer contributions, next fiscal year 20.2  
Other Postretirement Benefits Plan [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Employer contributions 2.5 3.0
Direct Payments [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Employer contributions 3.7 3.8
Expected employer contributions, next fiscal year 3.5  
Veba Trust [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Employer contributions 0.0 $ 0.0
Expected employer contributions, next fiscal year $ 0.0