Employee separation charges (Tables)

3 Months Ended

Mar. 31, 2012

Employee separation charges

Summary of separation activity

(Millions of dollars)	Total
Liability balance at December 31, 2010	$	22
Increase in liability (separation charges)	$	112
Reduction in liability (payments and other adjustments)	(44		)
Liability balance at December 31, 2011	$	90
Increase in liability (separation charges)	$	32
Reduction in liability (payments and other adjustments)	(103		)
Liability balance at March 31, 2012	$	19