Information Relating to the Consolidated Statement of Cash Flows



	Year ended December 31
	2015			2014			2013
Net increase in operating working capital was composed of the following:
Decrease (increase) in accounts and notes receivable	$	3,631		$	4,491		$	(1,101	)
Decrease (increase) in inventories	85			(146		)	(237		)
Decrease (increase) in prepaid expenses and other current assets	713			(407		)	834
(Decrease) increase in accounts payable and accrued liabilities	(5,769		)	(3,737		)	160
Decrease in income and other taxes payable	(639		)	(741		)	(987		)
Net increase in operating working capital	$	(1,979	)	$	(540	)	$	(1,331	)
Net cash provided by operating activities includes the following cash payments for income taxes:
Income taxes	$	4,645		$	10,562		$	12,898
Net sales (purchases) of marketable securities consisted of the following gross amounts:
Marketable securities purchased	$	(6	)	$	(162	)	$	(7	)
Marketable securities sold	128			14			10
Net sales (purchases) of marketable securities	$	122		$	(148	)	$	3
Net maturities of time deposits consisted of the following gross amounts:
Investments in time deposits	$	—		$	(317	)	$	(2,317	)
Maturities of time deposits	8			317			3,017
Net maturities of time deposits	$	8		$	—		$	700
Net (repayments) borrowings of short-term obligations consisted of the following gross and net amounts:
Proceeds from issuances of short-term obligations	$	13,805		$	9,070		$	1,551
Repayments of short-term obligations	(16,379		)	(4,612		)	(375		)
Net borrowings (repayments) of short-term obligations with three months or less maturity	2,239			(1,027		)	1,202
Net (repayments) borrowings of short-term obligations	$	(335	)	$	3,431		$	2,378

The “Net increase in operating working capital” includes reductions of $17, $58 and $79 for excess income tax benefits associated with stock options exercised during 2015, 2014 and 2013, respectively. These amounts are offset by an equal amount in “Net sales (purchases) of treasury shares.” "Other" includes changes in postretirement benefits obligations and other long-term liabilities.

The “Net sales (purchases) of treasury shares” represents the cost of common shares acquired less the cost of shares issued for share-based compensation plans. Purchases totaled $2, $5,006 and $5,004 in 2015, 2014 and 2013, respectively. No purchases were made under the company's share repurchase program in 2015. In 2014 and 2013, the company purchased 41.5 million and 41.6 million common shares for $5,000 and $5,000 under its share repurchase program, respectively.

In 2015, 2014 and 2013, “Net sales (purchases) of other short-term investments” generally consisted of restricted cash associated with upstream abandonment activities, tax payments, and funds held in escrow for tax-deferred exchanges and asset acquisitions and divestitures that was invested in cash and short-term securities and reclassified from “Cash and cash equivalents” to “Deferred charges and other assets” on the Consolidated Balance Sheet.

The Consolidated Statement of Cash Flows excludes changes to the Consolidated Balance Sheet that did not affect cash. "Depreciation, depletion and amortization," "Dry hole expense" and "Deferred income tax provision" collectively include approximately $3,700 in non-cash reductions to properties, plant and equipment recorded in 2015 relating to impairments and project suspensions and associated adverse tax effects, primarily as a result of downward revisions in the company's longer-term crude oil price outlook.

Refer also to Note 25, on page FS-59, for a discussion of revisions to the company’s AROs that also did not involve cash receipts or payments for the three years ending December 31, 2015.

The major components of “Capital expenditures” and the reconciliation of this amount to the reported capital and exploratory expenditures, including equity affiliates, are presented in the following table:



	Year ended December 31
	2015		2014			2013
Additions to properties, plant and equipment ^*	$	28,213	$	34,393		$	36,550
Additions to investments	555		526			934
Current-year dry hole expenditures	736		504			594
Payments for other liabilities and assets, net	—		(16		)	(93		)
Capital expenditures	29,504		35,407			37,985
Expensed exploration expenditures	1,031		1,110			1,178
Assets acquired through capital lease obligations and other financing obligations	47		332			16
Capital and exploratory expenditures, excluding equity affiliates	30,582		36,849			39,179
Company's share of expenditures by equity affiliates	3,397		3,467			2,698
Capital and exploratory expenditures, including equity affiliates	$	33,979	$	40,316		$	41,877


^*	Excludes noncash additions of $1,362 in 2015, $2,310 in 2014 and $1,661 in 2013.