Business Restructuring (Tables)

12 Months Ended

Dec. 31, 2017

Restructuring and Related Activities [Abstract]

Activity Related to Restructuring Reserves

2016 Restructuring Charge and Associated Reserve Activity
($ in millions, except no. of employees)	Severance and Other Costs			Asset Write-offs			Total Reserve			Employees Impacted
Performance Coatings		$77			$45			$122		1,069
Industrial Coatings	52			14			66			804
Corporate	7			—			7			85
Total 2016 restructuring charge		$136			$59			$195		1,958
2016 Activity	(6		)	(59		)	(65		)	(40	)
December 31, 2016		$130			$—			$130		1,918
2017 Activity	(46		)	—			(46		)	(1,090	)
Foreign currency impact	18			—			18			—
December 31, 2017		$102			$—			$102		828