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CONTINGENCIES (Details)
cubic_yard in Millions, $ in Millions
1 Months Ended 9 Months Ended
Apr. 14, 2021
USD ($)
Dec. 04, 2020
USD ($)
Oct. 10, 2018
mi
Jun. 30, 2018
USD ($)
site
company
May 17, 2017
hazardous_substance
company
Mar. 30, 2017
company
Mar. 31, 2016
USD ($)
age
Mar. 04, 2016
cubic_yard
Apr. 11, 2014
mi
Jun. 18, 2012
mi
May 31, 2007
company
mi
Oct. 01, 2022
USD ($)
site
Jan. 01, 2022
USD ($)
Loss Contingencies [Line Items]                          
Superfund sites | site                       28  
Environmental remediation costs deemed probable and reasonably estimable $ 441.0           $ 1,400.0            
Other assets, miscellaneous                       $ 16.3  
Environmental remediation, period construction of treatment facility to be maintained                       30 years  
Number of miles of river | mi     9           8.3 10.9 17    
Cubic yards of settlement | cubic_yard               3.5          
Approximate implementation time             6 years            
Number of other parties notified | age             105            
Number of companies offered cash out settlements | company         20 20              
Number of hazardous substances | hazardous_substance         8                
Number of companies named in suit | company       100                  
Estimated costs of remediation       $ 165.0                  
Number of municipalities, suit filed | site       42                  
Minimum                          
Loss Contingencies [Line Items]                          
Environmental remediation costs deemed probable and reasonably estimable   $ 420.0                      
Maximum                          
Loss Contingencies [Line Items]                          
Environmental remediation costs deemed probable and reasonably estimable   $ 468.0                      
Lower Passaic Cooperating Parties Group                          
Loss Contingencies [Line Items]                          
Number of companies | company                     47    
Property, Plant and Equipment, Other Types                          
Loss Contingencies [Line Items]                          
Environmental remediation costs, reserve                       $ 136.8 $ 159.1
Reserve for environmental remediation costs, current                       40.9  
Reserve for environmental remediation costs, noncurrent                       95.9  
Accrual for environmental loss contingencies, obligation after EPA funding                       120.5  
Environmental remediation expense                       21.8  
Property, Plant and Equipment, Other Types | Minimum                          
Loss Contingencies [Line Items]                          
Environmental remediation costs deemed probable and reasonably estimable                       64.2  
Property, Plant and Equipment, Other Types | Maximum                          
Loss Contingencies [Line Items]                          
Environmental remediation costs deemed probable and reasonably estimable                       229.1  
Centredale Site                          
Loss Contingencies [Line Items]                          
Environmental remediation costs deemed probable and reasonably estimable                       $ 38.0