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Supplemental Cash Flow Information
 3 Months Ended
Mar. 31, 2013
Supplemental Cash Flow Information [Abstract]  
SUPPLEMENTAL CASH FLOW INFORMATION
11.
SUPPLEMENTAL CASH FLOW INFORMATION

In order to determine net cash provided by operating activities, net income (loss) is adjusted by, among other things, changes in current assets and current liabilities as follows (in millions):
 
Three Months Ended
March 31,
 
2013
 
2012
Decrease (increase) in current assets:
 
 
 
Receivables, net
$
409

 
$
1,159

Inventories
(1,074
)
 
(471
)
Income taxes receivable
79

 
(14
)
Prepaid expenses and other
(233
)
 
6

Increase (decrease) in current liabilities:
 
 
 
Accounts payable
561

 
410

Accrued expenses
181

 
(100
)
Taxes other than income taxes
318

 
9

Income taxes payable
14

 
(96
)
Changes in current assets and current liabilities
$
255

 
$
903



The above changes in current assets and current liabilities differ from changes between amounts reflected in the applicable balance sheets for the respective periods for the following reasons:
•
the amounts shown above exclude changes in cash and temporary cash investments, deferred income taxes, and current portion of debt and capital lease obligations, as well as the effect of certain noncash investing and financing activities discussed below;
•
amounts accrued for capital expenditures and deferred turnaround and catalyst costs are reflected in investing activities when such amounts are paid;
•
amounts accrued for common stock purchases in the open market that are not settled as of the balance sheet date are reflected in financing activities when the purchases are settled and paid; and
•
certain differences between balance sheet changes and the changes reflected above result from translating foreign currency denominated balances at the applicable exchange rates as of each balance sheet date.

There were no significant noncash investing or financing activities for the three months ended March 31, 2013 and 2012.

Cash flows related to interest and income taxes were as follows (in millions):

 
Three Months Ended
March 31,
 
2013
 
2012
Interest paid in excess of amount capitalized
$
56

 
$
45

Income taxes paid, net
48

 
142