Commitments and Contingent Liabilities (Tables)

6 Months Ended

Jun. 30, 2017

Commitments and Contingencies Disclosure [Abstract]

Environmental Liabilities [Table Text Block]

Environmental Reserves
($ in millions)	June 30, 2017		December 31, 2016
New Jersey Chrome	$	151	$	163
Legacy glass and chemical	68		70
Other	51		52
Total	$	270	$	285
Current portion	$	83	$	76

Environmental Costs [Table Text Block]

Pre-tax charges against income for environmental remediation costs are included in "Other charges" in the accompanying condensed consolidated statement of income. The pre-tax charges and cash outlays related to such environmental remediation for the three and six months ended June 30, 2017 and 2016 were as follows:

	Three Months Ended June 30				Six Months Ended June 30
($ in millions)	2017		2016		2017	2016
Environmental remediation pre-tax charges	$	1	$	3	2	8
Cash outlays for environmental remediation activities	$	10	$	9	22	23