Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2012

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The fair value hierarchy for assets and liabilities measured at fair value on a recurring basis at September 30, 2012 and December 31, 2011 is as follows:

Assets and Liabilities Measured at Fair Value on a Recurring Basis

(Millions of dollars)

	At September 30, 2012								At December 31, 2011
	Total		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3
Marketable Securities	$	261	$	261	$	—	$	—	$	249	$	249	$	—	$	—
Derivatives	86		17		69		—		208		104		104		—
Total Assets at Fair Value	$	347	$	278	$	69	$	—	$	457	$	353	$	104	$	—
Derivatives	172		160		12		—		102		101		1		—
Total Liabilities at Fair Value	$	172	$	160	$	12	$	—	$	102	$	101	$	1	$	—

Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis

The fair value hierarchy for assets and liabilities measured at fair value on a nonrecurring basis at September 30, 2012 is as follows:

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

(Millions of dollars)

	At September 30, 2012
									Before-Tax Loss
	Total		Level 1		Level 2		Level 3		Three Months Ended		Nine Months Ended
Properties, plant and equipment, net (held and used)	$	53	$	—	$	—	$	53	$	74	$	97
Properties, plant and equipment, net (held for sale)	—		—		—		—		—		—
Investments and advances	—		—		—		—		—		4
Total Assets at Fair Value	$	53	$	—	$	—	$	53	$	74	$	101