Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2013

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 June 30, 2013 and December 31, 2012 is as follows:

Assets and Liabilities Measured at Fair Value on a Recurring Basis

(Millions of dollars)

	At June 30, 2013								At December 31, 2012
	Total		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3
Marketable Securities	$	258	$	258	$	—	$	—	$	266	$	266	$	—	$	—
Derivatives	82		26		56		—		86		21		65		—
Total Assets at Fair Value	$	340	$	284	$	56	$	—	$	352	$	287	$	65	$	—
Derivatives	86		86		—		—		149		148		1		—
Total Liabilities at Fair Value	$	86	$	86	$	—	$	—	$	149	$	148	$	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 June 30, 2013 is as follows:

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

(Millions of dollars)

	At June 30, 2013
	Total		Level 1		Level 2		Level 3		Before-Tax Loss
									Three Months Ended		Six Months Ended
Properties, plant and equipment, net (held and used)	$	—	$	—	$	—	$	—	$	10	$	14
Properties, plant and equipment, net (held for sale)	10		—		—		10		6		84
Investments and advances	18		—		15		3		103		103
Total Assets at Fair Value	$	28	$	—	$	15	$	13	$	119	$	201