Restructuring Costs (Tables)

9 Months Ended

Sep. 30, 2015

Restructuring Charges [Abstract]

Summary of separation activity

The following table summarizes the 2014 and 2015 employee separation activity:

(Millions of dollars)	Total
Liability balance at December 31, 2013	$	89
Increase in liability (separation charges)	382
Reduction in liability (payments and other adjustments)	(289		)
Liability balance at December 31, 2014	$	182
Increase in liability (separation charges)	180
Reduction in liability (payments and other adjustments)	(197		)
Liability balance at September 30, 2015	$	165