Other Comprehensive Income

3 Months Ended

Mar. 31, 2018

Stockholders' Equity Note [Abstract]

Other Comprehensive Income

Other Comprehensive Income (Loss)

Changes in accumulated other comprehensive loss, net of tax, for the three months ended March 31, 2018 and 2017 were as follows:

	Three Months Ended March 31, 2018
(Thousands of Dollars)	Gains and Losses on Cash Flow Hedges			Defined Benefit and Postretirement Items			Total
Accumulated other comprehensive loss at Jan. 1	$	(776	)	$	(691	)	$	(1,467	)
Losses reclassified from net accumulated other comprehensive loss	12			19			31
Net current period other comprehensive income	12			19			31
Accumulated other comprehensive loss at March 31	$	(764	)	$	(672	)	$	(1,436	)

	Three Months Ended March 31, 2017
(Thousands of Dollars)	Gains and Losses on Cash Flow Hedges			Defined Benefit and Postretirement Items			Total
Accumulated other comprehensive loss at Jan. 1	$	(678	)	$	(612	)	$	(1,290	)
Losses reclassified from net accumulated other comprehensive loss	9			15			24
Net current period other comprehensive income	9			15			24
Accumulated other comprehensive loss at March 31	$	(669	)	$	(597	)	$	(1,266	)

Reclassifications from accumulated other comprehensive loss for the three months ended March 31, 2018 and 2017 were as follows:

	Amounts Reclassified from Accumulated Other Comprehensive Loss
(Thousands of Dollars)	Three Months Ended March 31, 2018				Three Months Ended March 31, 2017
Losses on cash flow hedges:
Interest rate derivatives	$	15		(a)	$	15		(a)
Total, pre-tax	15				15
Tax benefit	(3		)		(6		)
Total, net of tax	12				9
Defined benefit pension and postretirement losses:
Amortization of net loss	24			(b)	24			(b)
Total, pre-tax	24				24
Tax benefit	(5		)		(9		)
Total, net of tax	19				15
Total amounts reclassified, net of tax	$	31			$	24

^(a)  Included in interest charges.

^(b)  Included in the computation of net periodic pension and postretirement benefit costs. See Note 10 for details regarding these benefit plans.