Employee Benefits (Tables)

12 Months Ended

Dec. 31, 2016

Employee Benefits

Schedule of Plans' assets measured at estimated fair value

	Balance
	December 31,
(Millions of dollars)	2016		Level 1		Level 2		Level 3
Assets:
Domestic equity securities	$	76	$	76	$	—	$	—
Foreign equity securities		35		35		—		—
Domestic fixed income mutual funds		17		17		—		—
Real estate mutual fund		8		8		—		—
Commodity mutual funds		4		4		—		—
Money market funds		4		4		—		—
Foreign fixed income mutual funds		2		2		—		—
Other		5		—		5		—
Total Assets	$	151	$	146	$	5	$	—

	Balance
	December 31,
(Millions of dollars)	2015		Level 1		Level 2		Level 3
Assets:
Domestic equity securities	$	64	$	64	$	—	$	—
Foreign equity securities		27		27		—		—
Real estate mutual fund		8		8		—		—
Domestic fixed income mutual funds		5		5		—		—
Commodity mutual funds		2		2		—		—
Foreign fixed income mutual funds		2		2		—		—
Money market funds		1		1		—		—
Other		5		—		5		—
Total Assets	$	114	$	109	$	5	$	—

Schedule of assumptions used in determining pension information for plans

	Years ended December 31,
	2016				2015				2014
Weighted average assumptions
Discount rate used to determine obligations	2.90	-	4.65	%	3.20	-	4.80	%	3.15	-	4.40	%
Discount rate used to determine net periodic benefit cost	3.20	-	4.80	%	2.70	-	4.40	%	3.55	-	5.20	%
Expected return on plan assets	6.75	-	7.00	%	6.75	-	7.50	%	7.00	-	8.00	%
Long-term rate of increase in compensation levels			4.00	%			4.00	%			4.00	%

Schedule of the funded status

	December 31,
	2016						2015
(Millions of dollars)	Assets exceed accumulated benefits		Accumulated benefits exceed assets		Total		Accumulated benefits exceed assets
Reconciliation of benefit obligation:
Benefit obligation at beginning of year	$	70	$	179	$	249	$	257
Service cost		4		5		9		10
Interest cost		3		8		11		10
Actuarial losses (gains)		—		6		6		(18)
Benefits paid		(4)		(9)		(13)		(8)
Other		—		—		—		(2)
Benefit obligation at end of year	$	73	$	189	$	262	$	249
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	$	46	$	68	$	114	$	122
Actual return on plan assets		6		4		10		(4)
Employer contributions		39		1		40		4
Benefits paid		(4)		(9)		(13)		(8)
Fair value of plan assets at end of year	$	87	$	64	$	151	$	114
Funded status	$	14	$	(125)	$	(111)	$	(135)

Schedule of net periodic benefit cost of plans

	Years ended December 31,
(Millions of dollars)	2016		2015		2014
Components of net periodic benefit cost:
Service cost	$	9	$	10	$	8
Interest cost		11		10		10
Expected return on plan assets		(8)		(8)		(9)
Amortization and other		5		5		2
Agreement termination gain		—		(1)		—
Net periodic benefit cost	$	17	$	16	$	11