Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

Accounting Policies and Basis of Presentation

Schedule of changes in the asset retirement obligation

	Years ended December 31,
(Millions of dollars)	2016		2015
Beginning balance	$	18	$	17
Accretion expense		1		1
Ending balance	$	19	$	18

Schedule of amounts paid for interest and income taxes

	Years ended December 31,
(Millions of dollars)	2016		2015		2014
Interest, net of interest capitalized	$	29	$	17	$	20
Income taxes, net of refunds		31		60		135

Schedule of non-cash transactions resulting from the deconsolidation

(Millions of dollars)
Decrease in net working capital	$	21
Increase in investment in and advances to affiliates		(74)
Decrease in property, plant and equipment		16
Decrease in goodwill		28
Decrease in other intangible assets, net (not subject to amortization)		17
Gain on sale of controlling interest in subsidiary		66
Net proceeds from sale of controlling interest in subsidiary	$	74