Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2019

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,
	2019			2018			2017
Decrease (increase) in current assets:
Receivables, net	$	(1,468	)	$	(457	)	$	(870	)
Inventories	(385		)	(197		)	(516		)
Prepaid expenses and other	427			(77		)	151
Increase (decrease) in current liabilities:
Accounts payable	1,534			304			1,842
Accrued expenses	(27		)	(113		)	21
Taxes other than income taxes payable	60			(73		)	172
Income taxes payable	153			(684		)	489
Changes in current assets and current liabilities	$	294		$	(1,297	)	$	1,289

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

	Year Ended December 31,
	2019			2018		2017
Interest paid in excess of amount capitalized, including interest on finance leases	$	452		$	463	$	457
Income taxes paid (refunded), net (see Note 15)	(116		)	1,361		410

Supplemental cash flow information related to our operating and finance leases was as follows (in millions):

	Year Ended December 31, 2019
	Operating Leases		Finance Leases
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows	$	441	$	50
Investing cash flows	1		—
Financing cash flows	—		34
Changes in lease balances resulting from new and modified leases (a)	1,756		239

___________________

(a) Includes noncash activity of $1.3 billion for operating lease ROU assets recorded on January 1, 2019 upon adoption of Topic 842.