SUPPLEMENTAL FINANCIAL STATEMENT INFORMATION

Temporary Investments



In millions	September 30, 2015		December 31, 2014
Temporary investments	$	611	$	1,480

Accounts and Notes Receivable



In millions	September 30, 2015		December 31, 2014
Accounts and notes receivable, net:
Trade	$	2,631	$	2,860
Other	201		223
Total	$	2,832	$	3,083

Inventories



In millions	September 30, 2015		December 31, 2014
Raw materials	$	416	$	494
Finished pulp, paper and packaging	1,263		1,273
Operating supplies	560		562
Other	101		95
Total	$	2,340	$	2,424

Depreciation Expense



	Three Months Ended September 30				Nine Months Ended September 30,
In millions	2015		2014		2015		2014
Depreciation expense	$	309	$	333	$	919	$	986

Valuation Accounts

Certain valuation accounts were as follows:



In millions	September 30, 2015		December 31, 2014
Accumulated depreciation	$	20,455	$	20,340
Allowance for doubtful accounts	71		82

There was no material activity related to asset retirement obligations during either of the three months or nine months ended September 30, 2015 or 2014.

Interest

Cash payments related to interest were as follows:



	Nine Months Ended September 30,
In millions	2015		2014
Interest payments	$	471	$	503

Amounts related to interest were as follows:



	Three Months Ended September 30				Nine Months Ended September 30,
In millions	2015		2014		2015		2014
Interest expense (a)	$	158	$	172	$	481	$	512
Interest income (a)	17		14		59		47
Capitalized interest costs	5		5		19		17


(a)	Interest expense and interest income exclude approximately $7 million and $25 million for the three months and nine months ended September 30, 2015 and $10 million and $29 million for the three months and nine months ended September 30, 2014, respectively related to investments in and borrowings from variable interest entities for which the Company has a legal right of offset (see Note 13).