Other Comprehensive Income

6 Months Ended

Jun. 30, 2018

Stockholders' Equity Note [Abstract]

Other Comprehensive Income

Other Comprehensive Income (Loss)

Changes in accumulated other comprehensive loss, net of tax, for the three and six months ended June 30, 2018 and 2017 were as follows:

	Three Months Ended June 30, 2018
(Thousands of Dollars)	Gains and Losses on Cash Flow Hedges			Defined Benefit and Postretirement Items			Total
Accumulated other comprehensive loss at April 1	$	(764	)	$	(672	)	$	(1,436	)
Losses reclassified from net accumulated other comprehensive loss	12			18			30
Net current period other comprehensive income	12			18			30
Accumulated other comprehensive loss at June 30	$	(752	)	$	(654	)	$	(1,406	)

	Three Months Ended June 30, 2017
(Thousands of Dollars)	Gains and Losses on Cash Flow Hedges			Defined Benefit and Postretirement Items			Total
Accumulated other comprehensive loss at April 1	$	(669	)	$	(597	)	$	(1,266	)
Losses reclassified from net accumulated other comprehensive loss	10			15			25
Net current period other comprehensive income	10			15			25
Accumulated other comprehensive loss at June 30	$	(659	)	$	(582	)	$	(1,241	)

	Six Months Ended June 30, 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	24			37			61
Net current period other comprehensive income	24			37			61
Accumulated other comprehensive loss at June 30	$	(752	)	$	(654	)	$	(1,406	)

	Six Months Ended June 30, 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	19			30			49
Net current period other comprehensive income	19			30			49
Accumulated other comprehensive loss at June 30	$	(659	)	$	(582	)	$	(1,241	)

Reclassifications from accumulated other comprehensive loss for the three and six months ended June 30, 2018 and 2017 were as follows:

	Amounts Reclassified from Accumulated Other Comprehensive Loss
(Thousands of Dollars)	Three Months Ended June 30, 2018				Three Months Ended June 30, 2017
Losses on cash flow hedges:
Interest rate derivatives	$	16		(a)	$	16		(a)
Total, pre-tax	16				16
Tax benefit	(4		)		(6		)
Total, net of tax	12				10
Defined benefit pension and postretirement losses:
Amortization of net loss	23			(b)	24			(b)
Total, pre-tax	23				24
Tax benefit	(5		)		(9		)
Total, net of tax	18				15
Total amounts reclassified, net of tax	$	30			$	25

	Amounts Reclassified from Accumulated Other Comprehensive Loss
(Thousands of Dollars)	Six Months Ended June 30, 2018				Six Months Ended June 30, 2017
Losses on cash flow hedges:
Interest rate derivatives	$	31		(a)	$	31		(a)
Total, pre-tax	31				31
Tax benefit	(7		)		(12		)
Total, net of tax	24				19
Defined benefit pension and postretirement losses:
Amortization of net loss	47			(b)	48			(b)
Total, pre-tax	47				48
Tax benefit	(10		)		(18		)
Total, net of tax	37				30
Total amounts reclassified, net of tax	$	61			$	49

^(a) Included in interest charges.

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