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Quarterly Financial Information (Tables)
 12 Months Ended
Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]  
Quarterly Financial Information (unaudited)
 
2012 Quarter Ended
 
Total
Millions
(except per share
amounts)
March 31
 
June 30
 
Sept. 30
 
Dec. 31
 
Net sales
$
3,333

 
$
3,528

 
$
3,408

 
$
3,243

 
$
13,512

Cost of Sales(1)
1,946

 
2,066

 
1,983

 
1,910

 
7,905

Amounts attributable to PPG
Continuing Operations
(50
)
 
297

 
288

 
191

 
726

Discontinued Operations
63

 
65

 
51

 
36

 
215

Net income (2)
13

 
362

 
339

 
227

 
941

Earnings per common share
Continuing Operations
(0.33
)
 
1.94

 
1.88

 
1.24

 
4.73

Discontinued Operations
0.41

 
0.43

 
0.33

 
0.23

 
1.40

Earnings per common share
0.08

 
2.37

 
2.21

 
1.47

 
6.13

Earnings per common share - assuming dilution
Continuing Operations
$
(0.32
)
 
$
1.92

 
$
1.86

 
$
1.23

 
$
4.69

Discontinued Operations
$
0.40

 
$
0.42

 
$
0.32

 
$
0.23

 
$
1.37

Earnings per common share – assuming dilution (2)
$
0.08

 
$
2.34

 
$
2.18

 
$
1.46

 
$
6.06

 
2011 Quarter Ended
 
Total
Millions
(except per share
amounts)
March 31
 
June 30
 
Sept. 30
 
Dec. 31
 
Net sales
$
3,114

 
$
3,516

 
$
3,404

 
$
3,119

 
$
13,153

Cost of Sales(1)
1,845

 
2,090

 
2,042

 
1,888

 
7,865

Amounts attributable to PPG
Continuing Operations
167

 
266

 
247

 
178

 
858

Discontinued Operations
61

 
74

 
64

 
38

 
237

Net income (attributable to PPG)
228

 
340

 
311

 
216

 
1,095

Earnings per common share
Continuing Operations
1.04

 
1.68

 
1.57

 
1.16

 
5.45

Discontinued Operations
0.38

 
0.47

 
0.41

 
0.25

 
1.51

Earnings per common share
1.42

 
2.15

 
1.98

 
1.41

 
6.96

Earnings per common share - assuming dilution
Continuing Operations
$
1.03

 
$
1.66

 
$
1.56

 
$
1.15

 
$
5.40

Discontinued Operations
$
0.37

 
$
0.46

 
$
0.40

 
$
0.24

 
$
1.47

Earnings per common share – assuming dilution
$
1.40

 
$
2.12

 
$
1.96

 
$
1.39

 
$
6.87

(1)
Exclusive of depreciation and amortization.
(2)
First quarter 2012 includes charge of $163 million or $1.06 per diluted share related to restructuring (See Note 7, "Business Restructuring") and charge of $99 million or $0.64 per diluted share related to environmental remediation (See Note 15, "Commitments and Contingent Liabilities").