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Commitments and Contingent Liabilities (Tables)
 6 Months Ended
Jun. 30, 2020
Commitments and Contingencies Disclosure [Abstract]  
Environmental Liabilities [Table Text Block]
Environmental Reserves
($ in millions)June 30, 2020December 31, 2019
New Jersey Chrome$108  $134  
Glass and chemical99  96  
Other84  74  
Total$291  $304  
Current portion$85  $62  
Environmental Costs [Table Text Block]
Pretax charges against income for environmental remediation costs are included in Other charges in the accompanying condensed consolidated statement of income. The pretax charges and cash outlays related to such environmental remediation for the three and six months ended June 30, 2020 and 2019 were as follows:
Three Months Ended
June 30		Six Months Ended
June 30
($ in millions)2020201920202019
Environmental remediation pretax charges$4  $35  $15  $51  
Cash outlays for environmental remediation activities$12  $20  $37  $36