Business Restructuring (Tables)
 6 Months Ended
Jun. 30, 2017
Restructuring and Related Activities [Abstract]  
Restructuring and Related Costs [Table Text Block]
The following table summarizes the 2016 restructuring charge, the reserve activity for 2016, and the reserve activity for the six months ended June 30, 2017:
($ in millions, except for employees impacted)
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
)
Balance as of December 31, 2016
$
130

 
$
—

 
$
130

 
1,918

2017 Activity
(17
)
 
—

 
(17
)
 
(594
)
Foreign currency
12

 
—

 
12

 
—

Balance as of June 30, 2017
$
125

 
$
—

 
$
125

 
1,324