Fair Value Measurements (Tables)

6 Months Ended

Jun. 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 June 30, 2015, and December 31, 2014, is as follows:

Assets and Liabilities Measured at Fair Value on a Recurring Basis

(Millions of dollars)

	At June 30, 2015								At December 31, 2014
	Total		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3
Marketable Securities	$	365	$	365	$	—	$	—	$	422	$	422	$	—	$	—
Derivatives	45		22		23		—		413		394		19		—
Total Assets at Fair Value	$	410	$	387	$	23	$	—	$	835	$	816	$	19	$	—
Derivatives	80		60		20		—		84		83		1		—
Total Liabilities at Fair Value	$	80	$	60	$	20	$	—	$	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 June 30, 2015, is as follows:

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

(Millions of dollars)

	At June 30, 2015
	Total		Level 1		Level 2		Level 3		Before-Tax Loss
									Three Months Ended		Six Months Ended
Properties, plant and equipment, net (held and used)	$	2,069	$	—	$	44	$	2,025	$	2,307	$	2,566
Properties, plant and equipment, net (held for sale)	289		—		289		—		273		273
Investments and advances	75		—		75		—		20		21
Total Assets at Fair Value	$	2,433	$	—	$	408	$	2,025	$	2,600	$	2,860