Business Restructuring (Schedule of Restructuring Activity) (Details) $ in Millions	3 Months Ended		6 Months Ended	12 Months Ended
	Mar. 31, 2016 USD ($) employee	Jun. 30, 2015 USD ($)	Jun. 30, 2015 USD ($) employee	Dec. 31, 2015 USD ($) employee
Restructuring Cost and Reserve [Line Items]
Cash Charges Related to Restructuring	85.00%
Severance Costs			$ 121	$ 87
Asset Impairment Charges			19	0
Business restructuring		$ 140	$ 140	$ 87
Employees Impacted | employee	683		1,853	806
Restructuring Reserves, Deductions	$ 0			$ (19)
Number Of Employees Included In Plan Who Ceased Employment In Period | employee	(123)			(1,047)
Restructuring Reserve, Translation Adjustment	$ 0			$ 0
Restructuring Reserve	0
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserves, Deductions	(18)			(32)
Restructuring Reserve, Translation Adjustment	2			(2)
Restructuring Reserve	71
Restructuring Reserve, Total [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserves, Deductions	(18)			(51)
Restructuring Reserve, Translation Adjustment	2			$ (2)
Restructuring Reserve	$ 71
Performance Coatings Segment [Member]
Restructuring Cost and Reserve [Line Items]
Severance Costs			$ 71
Asset Impairment Charges			6
Business restructuring			$ 77
Employees Impacted | employee			1,259
Industrial Coatings Segment [Member]
Restructuring Cost and Reserve [Line Items]
Severance Costs			$ 42
Asset Impairment Charges			13
Business restructuring			$ 55
Employees Impacted | employee			534
Glass Segment [Member]
Restructuring Cost and Reserve [Line Items]
Severance Costs			$ 4
Asset Impairment Charges			0
Business restructuring			$ 4
Employees Impacted | employee			33
Corporate, Non-Segment [Member]
Restructuring Cost and Reserve [Line Items]
Severance Costs			$ 4
Asset Impairment Charges			0
Business restructuring			$ 4
Employees Impacted | employee			27