Supplemental Cash Flow Information (Tables)

6 Months Ended

Jun. 30, 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):

	Six Months Ended June 30,
	2018			2017
Decrease (increase) in current assets:
Receivables, net	$	(595	)	$	1,396
Inventories	(46		)	123
Prepaid expenses and other	(35		)	86
Increase (decrease) in current liabilities:
Accounts payable	661			(942		)
Accrued expenses	(83		)	262
Taxes other than income taxes payable	28			(41		)
Income taxes payable	(375		)	(25		)
Changes in current assets and current liabilities	$	(445	)	$	859

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

	Six Months Ended June 30,
	2018		2017
Interest paid in excess of amount capitalized	$	248	$	235
Income taxes paid, net	817		263