Cash Flow Information

12 Months Ended

Dec. 31, 2015

Cash Flow Information [Abstract]

Cash Flow Information

Note 21—Cash Flow Information
Amounts included in continuing operations for the years ended December 31 were:
	Millions of Dollars
		2015	2014	2013
Noncash Investing and Financing Activities
Increase in PP&E related to an increase in asset retirement obligations*	$	402	1,611	1,329
Increase (decrease) in PP&E and debt related to a capital lease asset and obligation		7	(84)	906
Cash Payments
Interest	$	920	669	566
Income taxes**		523	4,203	4,910
Net Sales (Purchases) of Short-Term Investments
Short-term investments purchased	$	-	(876)	(361)
Short-term investments sold		-	1,129	98
	$	-	253	(263)
*Includes $68 million and $212 million in 2014 and 2013, respectively, primarily related to the impact of U.K. tax law changes on the
deductibility of decommissioning costs.
**Net of $642 million in 2015 related to a refund received from the Internal Revenue Service for 2014 overpaid taxes.

In relation to certain working capital changes associated with investing activities, we reclassified $180million and $55million of the “Increase (decrease) in accounts payable” line within “Cash Flows From Operating Activities” to the “Working capital changes associated with investing activities” line within “Cash Flows From Investing Activities” for December 31, 2014 and December 31, 2013, respectively. There was no impact to “Cash and Cash Equivalents at End of Period.”