Pension and Other Postretirement Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2012

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Schedule of Defined Benefit Plans Disclosures

The following table summarizes the components of net periodic pension cost and the cost of other postretirement benefits for the periods presented:

	Three Months Ended September 30,
	United States Pension Benefits						Foreign Pension Benefits						Other Postretirement Benefits
Millions of dollars	2012			2011			2012			2011			2012			2011
Service cost	$	1		$	—		$	2		$	2		$	2		$	2
Interest cost	45			48			6			5			5			7
Expected return on plan assets	(48		)	(48		)	(3		)	(3		)	—			—
Amortization:
Actuarial loss	11			8			1			1			—			—
Prior service credit	(1		)	(1		)	—			—			(11		)	(12		)
Settlement and curtailment (gain) loss	1			—			1			—			(3		)	—
Net periodic benefit cost (credit)	$	9		$	7		$	7		$	5		$	(7	)	$	(3	)

	Nine Months Ended September 30,
	United States Pension Benefits						Foreign Pension Benefits						Other Postretirement Benefits
Millions of dollars	2012			2011			2012			2011			2012			2011
Service cost	$	2		$	—		$	5		$	6		$	5		$	6
Interest cost	134			144			15			15			16			24
Expected return on plan assets	(145		)	(144		)	(8		)	(9		)	—			—
Amortization:
Actuarial loss	34			24			3			3			—			—
Prior service credit	(3		)	(3		)	—			—			(34		)	(30		)
Settlement and curtailment (gain) loss	5			—			1			—			(52		)	—
Net periodic benefit cost (credit)	$	27		$	21		$	16		$	15		$	(65	)	$	—