Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2015

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, 2015, and December 31, 2014, is as follows:

Assets and Liabilities Measured at Fair Value on a Recurring Basis

(Millions of dollars)

	At September 30, 2015								At December 31, 2014
	Total		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3
Marketable Securities	$	306	$	306	$	—	$	—	$	422	$	422	$	—	$	—
Derivatives	125		95		30		—		413		394		19		—
Total Assets at Fair Value	$	431	$	401	$	30	$	—	$	835	$	816	$	19	$	—
Derivatives	75		48		27		—		84		83		1		—
Total Liabilities at Fair Value	$	75	$	48	$	27	$	—	$	84	$	83	$	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, 2015, is as follows:

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

(Millions of dollars)

	At September 30, 2015
	Total		Level 1		Level 2		Level 3		Before-Tax Loss
									Three Months Ended		Nine Months Ended
Properties, plant and equipment, net (held and used)	$	66	$	—	$	5	$	61	$	134	$	2,700
Properties, plant and equipment, net (held for sale)	445		—		445		—		121		393
Investments and advances	—		—		—		—		1		23
Total Assets at Fair Value	$	511	$	—	$	450	$	61	$	256	$	3,116