Information Relating to the Consolidated Statement of Cash Flows

The “Net increase in operating working capital” was composed of the following operating changes:



	Nine Months Ended September 30
	2017			2016
	(Millions of dollars)
Decrease (increase) in accounts and notes receivable	$	265		$	(455	)
(Increase) decrease in inventories	(436		)	232
Decrease in prepaid expenses and other current assets	196			844
Decrease in accounts payable and accrued liabilities	(729		)	(1,783		)
Increase (decrease) in income and other taxes payable	9			(104		)
Net increase in operating working capital	$	(695	)	$	(1,266	)

“Net Cash Provided by Operating Activities” included the following cash payments for interest on debt and for income taxes:



	Nine Months Ended September 30
	2017		2016
	(Millions of dollars)
Interest on debt (net of capitalized interest)	$	30	$	28
Income taxes	2,203		1,492

"Other" includes changes in postretirement benefits obligations and other long-term liabilities.

Information related to "Restricted Cash" is included on page 22 in Note 15 under the heading "Restricted Cash."

The “Net sales of marketable securities” consisted of the following gross amounts:



	Nine Months Ended September 30
	2017			2016
	(Millions of dollars)
Marketable securities purchased	$	(3	)	$	(9	)
Marketable securities sold	3			11
Net sales of marketable securities	$	—		$	2

The “Net borrowing of loans by equity affiliates” consisted of the following gross amounts:



	Nine Months Ended September 30
	2017			2016
	(Millions of dollars)
Borrowing of loans by equity affiliates	$	(142	)	$	(2,271	)
Repayment of loans by equity affiliates	106			76
Net borrowing of loans by equity affiliates	$	(36	)	$	(2,195	)

The “Net (purchases) sales of other short-term investments” consisted of the following gross amounts:



	Nine Months Ended September 30
	2017			2016
	(Millions of dollars)
Purchases of other short-term investments	$	(26	)	$	—
Sales of other short-term investments	7			155
Net (purchases) sales of other short-term investments	$	(19	)	$	155

The “Net (repayments) borrowings of short-term obligations" consisted of the following gross and net amounts:



	Nine Months Ended September 30
	2017			2016
	(Millions of dollars)
Repayments of short-term obligations	$	(8,403	)	$	(8,415	)
Proceeds from issuances of short-term obligations	3,415			11,695
Net borrowings of short-term obligations with three months or less maturity	(2,197		)	(2,411		)
Net (repayments) borrowings of short-term obligations	$	(7,185	)	$	869

The “Net sales of treasury shares” represents the cost of common shares acquired less the cost of shares issued for share-based compensation plans. Purchases totaled $1 million for the first nine months in 2017 and $2 million for the first nine months in 2016. No purchases were made under the company's share repurchase program in the first nine months of 2017 or 2016.

The major components of “Capital expenditures” and the reconciliation of this amount to the capital and exploratory expenditures, including equity affiliates, are as follows:



	Nine Months Ended September 30
	2017		2016
	(Millions of dollars)
Additions to properties, plant and equipment	$	9,615	$	13,757
Additions to investments	16		38
Current year dry hole expenditures	131		305
Payments for other liabilities and assets, net	1		—
Capital expenditures	9,763		14,100
Expensed exploration expenditures	368		370
Assets acquired through capital lease obligations	3		4
Capital and exploratory expenditures, excluding equity affiliates	10,134		14,474
Company’s share of expenditures by equity affiliates	3,252		2,693
Capital and exploratory expenditures, including equity affiliates	$	13,386	$	17,167