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Supplemental Cash Flow Information (Tables)
 12 Months Ended
Dec. 31, 2014
Supplemental Cash Flow Information [Abstract]  
Supplemental Cash Flow Disclosures
Cash flows related to interest and income taxes paid were as follows (in millions):
 
Year Ended December 31,
 
2014
 
2013
 
2012
Interest paid in excess of amount capitalized
$
392

 
$
361

 
$
302

Income taxes paid, net
1,624

 
387

 
705

In order to determine net cash provided by operating activities, net income is adjusted by, among other things, changes in current assets and current liabilities as follows (in millions):
 
Year Ended December 31,
 
2014
 
2013
 
2012
Decrease (increase) in current assets:
 
 
 
 
 
Receivables, net
$
2,753

 
$
(753
)
 
$
437

Inventories
(1,014
)
 
(13
)
 
(282
)
Income taxes receivable
(23
)
 
10

 
51

Prepaid expenses and other
(32
)
 
2

 
(28
)
Increase (decrease) in current liabilities:
 
 
 
 
 
Accounts payable
(3,149
)
 
977

 
(113
)
Accrued expenses
38

 
53

 
13

Taxes other than income taxes
(64
)
 
337

 
(260
)
Income taxes payable
(319
)
 
309

 
(120
)
Changes in current assets and current liabilities
$
(1,810
)
 
$
922

 
$
(302
)