Supplemental Cash Flow Information (Tables)

3 Months Ended

Mar. 31, 2018

Supplemental Cash Flow Information [Abstract]

Schedule of cash flows, supplemental disclosures

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):

	Three Months Ended March 31,
	2018			2017
Decrease (increase) in current assets:
Receivables, net	$	145		$	817
Inventories	(126		)	(291		)
Prepaid expenses and other	(79		)	53
Increase (decrease) in current liabilities:
Accounts payable	(322		)	(306		)
Accrued expenses	(131		)	20
Taxes other than income taxes payable	(111		)	(123		)
Income taxes payable	(402		)	(19		)
Changes in current assets and current liabilities	$	(1,026	)	$	151

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

	Three Months Ended March 31,
	2018		2017
Interest paid in excess of amount capitalized	$	127	$	128
Income taxes paid, net	552		96