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Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2014

Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]

Assets and Liabilities Measured at Fair Value on a Recurring Basis

Assets and liabilities measured at fair value on a recurring basis at December 31, 2014 and 2013 are as follows:

		Total Cost Basis								Quoted Prices In Active Markets for Identical Assets (Level 1)								Significant Other Observable Inputs (Level 2)								Total Fair Value
Millions of dollars		2014				2013				2014				2013				2014				2013				2014				2013
Money market funds (1)		$	21			$	465			$	21			$	465			$	—			$	—			$	21			$	465
Net derivative contracts		—				—				—				—				(1		)		(25		)		(1		)		(25		)
Available for sale investments		16				8				26				18				—				—				26				18

⁽¹⁾ Money market funds are comprised primarily of government obligations and other first tier obligations.

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- Definition

Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19190-110258

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