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SUPPLEMENTAL FINANCIAL STATEMENT INFORMATION (Note)
3 Months Ended
Mar. 31, 2015
Condensed Financial Information of Parent Company Only Disclosure [Abstract]  
Supplemental Financial Statement Information [Note Text Block]
SUPPLEMENTAL FINANCIAL STATEMENT INFORMATION

Temporary Investments 
In millions
March 31, 2015
 
December 31, 2014
Temporary investments
$
1,234

 
$
1,480


Accounts and Notes Receivable
In millions
March 31, 2015
 
December 31, 2014
Accounts and notes receivable, net:
 
 
 
Trade
$
2,821

 
$
2,860

Other
253

 
223

Total
$
3,074

 
$
3,083



Inventories 
In millions
March 31, 2015
 
December 31, 2014
Raw materials
$
423

 
$
494

Finished pulp, paper and packaging
1,386

 
1,273

Operating supplies
556

 
562

Other
72

 
95

Total
$
2,437

 
$
2,424



Depreciation Expense 
 
Three Months Ended
March 31,
In millions
2015
 
2014
Depreciation expense
$
304

 
$
324


Valuation Accounts

Certain valuation accounts were as follows: 
In millions
March 31, 2015
 
December 31, 2014
Accumulated depreciation
$
20,279

 
$
20,340

Allowance for doubtful accounts
78

 
82


There was no material activity related to asset retirement obligations during either of the three months ended March 31, 2015 or 2014.

Interest

Cash payments related to interest were as follows: 
 
Three Months Ended
March 31,
In millions
2015
 
2014
Interest payments
$
129

 
$
113



Amounts related to interest were as follows: 
 
Three Months Ended
March 31,
In millions
2015
 
2014
Interest expense (a)
$
159

 
$
164

Interest income (a)
22

 
21

Capitalized interest costs
7

 
6


(a)
Interest expense and interest income exclude approximately $9 million for the three months ended March 31, 2015 and $10 million for the three months ended March 31, 2014 related to investments in and borrowings from variable interest entities for which the Company has a legal right of offset (see Note 13).