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Goodwill and Other Identifiable Intangible Assets (Tables)
 9 Months Ended
Sep. 30, 2012
Goodwill and Intangible Assets Disclosure [Abstract]  
Carrying Amount of Goodwill Attributable to Each Reportable Segment
The change in the carrying amount of goodwill attributable to each reportable segment for the nine months ended September 30, 2012 was as follows:
 
 
Performance
Coatings
 
Industrial
Coatings
 
Architectural
Coatings –
EMEA
 
Optical
and
Specialty
Materials
 
Commodity
Chemicals
 
Glass
 
Total
 
(Millions)
Balance, December 31, 2011
$
1,139

 
$
484

 
$
933

 
$
48

 
$
6

 
$
50

 
$
2,660

Acquisitions
20

 
12

 
11

 
—

 
—

 
—

 
43

Currency
5

 
1

 
(3
)
 
(1
)
 
—

 
1

 
3

Balance, September 30, 2012
$
1,164

 
$
497

 
$
941

 
$
47

 
$
6

 
$
51

 
$
2,706
Identifiable Intangible Assets with Finite Lives
The Company’s identifiable intangible assets with finite lives are being amortized over their estimated useful lives and are detailed below:
 
 
September 30, 2012
 
December 31, 2011
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Net
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Net
 
(Millions)
Acquired technology
$
515

 
$
(340
)
 
$
175

 
$
511

 
$
(308
)
 
$
203

Customer-related intangibles
968

 
(467
)
 
501

 
945

 
(412
)
 
533

Tradenames
119

 
(55
)
 
64

 
116

 
(50
)
 
66

Other
35

 
(29
)
 
6

 
32

 
(25
)
 
7

Balance
$
1,637

 
$
(891
)
 
$
746

 
$
1,604

 
$
(795
)
 
$
809