Information Relating to the Consolidated Statement of Cash Flows

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



	Three Months Ended March 31
	2017			2016
	(Millions of dollars)
Decrease in accounts and notes receivable	$	317		$	468
Increase in inventories	(550		)	(176		)
Decrease (increase) in prepaid expenses and other current assets	209			(241		)
Decrease in accounts payable and accrued liabilities	(1,178		)	(1,039		)
Increase (decrease) in income and other taxes payable	245			(5		)
Net increase in operating working capital	$	(957	)	$	(993	)

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



	Three Months Ended March 31
	2017		2016
	(Millions of dollars)
Interest on debt (net of capitalized interest)	$	—	$	—
Income taxes	494		453

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

Information related to "Restricted Cash" is included on page 21 in Note 15 under the heading "Restricted Cash."

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



	Three Months Ended March 31
	2017		2016
	(Millions of dollars)
Marketable securities purchased	$	—	$	(6	)
Marketable securities sold	2		6
Net sales of marketable securities	$	2	$	—

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



	Three Months Ended March 31
	2017			2016
	(Millions of dollars)
Borrowing of loans by equity affiliates	$	(70	)	$	(96	)
Repayment of loans by equity affiliates	64			4
Net borrowing of loans by equity affiliates	$	(6	)	$	(92	)

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



	Three Months Ended March 31
	2017			2016
	(Millions of dollars)
Purchases of other short-term investments	$	(9	)	$	(13	)
Sales of other short-term investments	2			80
Net sales of other short-term investments	$	(7	)	$	67

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



	Three Months Ended March 31
	2017			2016
	(Millions of dollars)
Repayments of short-term obligations	$	(2,952	)	$	(3,152	)
Proceeds from issuances of short-term obligations	3,415			2,831
Net borrowings of short-term obligations with three months or less maturity	(4,391		)	4,123
Net borrowings of short-term obligations	$	(3,928	)	$	3,802

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 three months in 2017 and 2016. No purchases were made under the company's share repurchase program in the first three 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:



	Three Months Ended March 31
	2017		2016
	(Millions of dollars)
Additions to properties, plant and equipment	$	3,305	$	5,285
Additions to investments	3		115
Current year dry hole expenditures	7		166
Capital expenditures	3,315		5,566
Expensed exploration expenditures	137		108
Assets acquired through capital lease obligations	1		4
Capital and exploratory expenditures, excluding equity affiliates	3,453		5,678
Company’s share of expenditures by equity affiliates	939		791
Capital and exploratory expenditures, including equity affiliates	$	4,392	$	6,469