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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS
 12 Months Ended
Dec. 31, 2012
Schedule To Financial Statements [Abstract]  
Schedule II - Valuation and Qualifying Accounts

 
 
 
 
Additions
 
 
 
 
 
 
Balance at
 
Charged to
 
Charged to
 
Other
 
Balance at
 
 
Beginning of
 
Costs and
 
Other
 
Additions
 
End of
 
 
Year
 
Expense
 
Accounts
 
(Deductions)
 
Year
Reserves and allowances deducted
 
 
 
 
 
 
 
 
 
 
from asset accounts:
 
 
 
 
 
 
 
 
 
 
Materials and supplies inventory allowances
 
 
 
 
 
 
 
 
 
 
Year Ended December 31, 2012
 
$
26

 
$
7

 
$
—

 
$
(6
)
a 
$
27

Year Ended December 31, 2011
 
26

 
4

 
—

 
(4
)
a 
26

Year Ended December 31, 2010
 
21

 
11

 
—

 
(6
)
a 
26

Valuation allowance for deferred tax assets
 
 
 
 
 
 
 
 
 
 
Year Ended December 31, 2012
 
$
2,393

 
$
49

 
$
1

 
$
—

 
$
2,443

Year Ended December 31, 2011
 
2,226

 
146

 
21

 
—

 
2,393

Year Ended December 31, 2010
 
2,157

 
55

 
14

 
—

 
2,226

 
 
 
 
 
 
 
 
 
 
 
Reserves for non-income taxes:
 
 
 
 
 
 
 
 
 
 
Year Ended December 31, 2012
 
$
73

 
$
21

 
$
(2
)
 
$
(12
)
b 
$
80

Year Ended December 31, 2011
 
73

 
12

 
(2
)
 
(10
)
b 
73

Year Ended December 31, 2010
 
47

 
29

 
—

 
(3
)
b 
73

a.
Primarily represents write-offs of obsolete materials and supplies inventories.
b.
Represents amounts paid or adjustments to reserves based on revised estimates.