Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2018

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 March 31, 2018, and December 31, 2017, is as follows:

Assets and Liabilities Measured at Fair Value on a Recurring Basis

(Millions of dollars)



	At March 31, 2018								At December 31, 2017
	Total		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3
Marketable Securities	$	38	$	38	$	—	$	—	$	9	$	9	$	—	$	—
Derivatives	7		—		7		—		22		—		22		—
Total Assets at Fair Value	$	45	$	38	$	7	$	—	$	31	$	9	$	22	$	—
Derivatives	95		64		31		—		124		78		46		—
Total Liabilities at Fair Value	$	95	$	64	$	31	$	—	$	124	$	78	$	46	$	—

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 March 31, 2018, is as follows:

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

(Millions of dollars)



	At March 31, 2018

	Total		Level 1		Level 2		Level 3		Before-Tax Loss
	Total		Level 1		Level 2		Level 3		Before-Tax Loss
Properties, plant and equipment, net (held and used)	$	—	$	—	$	—	$	—	$	—
Properties, plant and equipment, net (held for sale)	631		—		631		—		163
Investments and advances	1		—		—		1		1
Total Assets at Fair Value	$	632	$	—	$	631	$	1	$	164