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Litigation and Environmental Lower Passaic River (Details) - Pending Litigation [Member]
$ in Millions
 12 Months Ended
Oct. 05, 2016
USD ($)
Dec. 31, 2019
USD ($)
Parties
mi
Defendants
claims
Lower Passaic River Study Area [Member]    
Site Contingency [Line Items]    
Miles of river | mi   17
Number of Parties at a Joint Defense Group | Parties   44
Lower Passaic River Study Area [Member] | EPA preferred alternative estimate [Member]    
Site Contingency [Line Items]    
Environmental Remediation Expense | $   $ 1,700
Lower Passaic River Study Area [Member] | AOC required engineering and design work [Member]    
Site Contingency [Line Items]    
Environmental Remediation Expense | $ $ 165  
Loss Contingency, Pending Claims, Number | claims   2
Loss Contingency, Number of Defendants | Defendants   120
Lower Passaic River Study Area [Member] | Design [Member]    
Site Contingency [Line Items]    
Estimated Remedy Implementation Period 4 years  
Lower Passaic River Study Area [Member] | Clean Up Implementation [Member]    
Site Contingency [Line Items]    
Estimated Remedy Implementation Period 6 years  
Lower Passaic River Study Area, Lower Portion [Member]    
Site Contingency [Line Items]    
Miles of river | mi   8