Commitments and Contingent Liabilities (Tables)

12 Months Ended

Dec. 31, 2016

Commitments and Contingencies Disclosure [Abstract]

Accretion Of Future Funding Obligation

		Consolidated Balance Sheet
		Asbestos Settlement Liability						Equity Forward (Asset) Liability			Pre-tax Charge
($ in millions)		Current			Long-term
Balance as of January 1, 2014		$	763		$	245		$	(207	)	$	11
Change in fair value:
	PPG stock	58			—			—			58
	Equity forward instrument	—			—			(60		)	(60		)
Accretion of asbestos liability		—			14			—			14
Balance as of and Activity for the year ended December 31, 2014		$	821		$	259		$	(267	)	$	12
Change in fair value:
	PPG stock	(46		)	—			—			(46		)
	Equity forward instrument	—			—			44			44
Accretion of asbestos liability		14			—			—			14
Reclassification		7			(7		)	—			—
Balance as of and Activity for the year ended December 31, 2015		$	796		$	252		$	(223	)	$	12
Change in fair value:
	PPG stock	34			—			—			34
	Equity forward instrument	—						(35		)	(35		)
Accretion of asbestos liability		—			6			—			6
Settlement of equity forward instrument with counterparty (a)		—			—			(49		)	—
Contribution of PCE shares and relinquishment of PC investment		(15		)	—			—			—
Contribution of 2,777,778 shares of PPG stock to the PC Trust		(308		)				308
Contribution of cash to the PC Trust (a)		(506		)	(258		)	—
Reclassification		(1		)	—			(1		)	—
Balance as of and Activity for the year ended December 31, 2016		$	—		$	—		$	—		$	5

Schedule of Loss Contingencies by Contingency [Table Text Block]

Environmental Reserves
($ in millions)	2016		2015
New Jersey Chrome	$	163	$	133
Legacy glass and chemical	70		48
Other	52		52
Total	$	285	$	233
Current Portion	$	76	$	51

Environmental Costs [Table Text Block]

Pre-tax charges against income for environmental remediation
($ in millions)	2016		2015		2014
New Jersey Chrome	$	60	$	—	$	136
Other	34		9		8
Total	$	94	$	9	$	144
Cash outlays for environmental spending	$	47	$	109	$	165