Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2016

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):

	Year Ended December 31,
	2016			2015			2014
Decrease (increase) in current assets:
Receivables, net	$	(1,531	)	$	1,294		$	2,753
Inventories	771			(222		)	(1,014		)
Income taxes receivable	156			(104		)	(23		)
Prepaid expenses and other	(109		)	(45		)	(32		)
Increase (decrease) in current liabilities:
Accounts payable	1,556			(1,787		)	(3,149		)
Accrued expenses	117			(40		)	38
Taxes other than income taxes	82			(74		)	(64		)
Income taxes payable	(66		)	(328		)	(319		)
Changes in current assets and current liabilities	$	976		$	(1,306	)	$	(1,810	)

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

	Year Ended December 31,
	2016		2015		2014
Interest paid in excess of amount capitalized	$	427	$	416	$	392
Income taxes paid, net	444		2,093		1,624