Other Comprehensive Income

12 Months Ended

Dec. 31, 2019

Stockholders' Equity Note [Abstract]

Other Comprehensive Income

es in accumulated other comprehensive loss, net of tax, for the years ended Dec. 31:

	2019
(Millions of Dollars)	Gains and Losses on Cash Flow Hedges			Defined Benefit Pension and Postretirement Items				Total
Accumulated other comprehensive loss at Jan. 1	$	(0.7	)	$	(0.7	)		$	(1.4	)
Other comprehensive loss before reclassifications (net of taxes of $0 and $(0.1), respectfully	—			(0.2		)		(0.2		)
Losses reclassified from net accumulated other comprehensive loss:
Amortization of net actuarial loss (net of taxes of $0)	—			0.2			(a)	0.2
Net current period other comprehensive income (loss)	—			—				—
Accumulated other comprehensive loss at Dec. 31	$	(0.7	)	$	(0.7	)		$	(1.4	)

^(a)  Included in the computation of net periodic pension and postretirement benefit costs. See Note 9 for further information.

	2018
(Millions of Dollars)	Gains and Losses on Cash Flow Hedges				Defined Benefit Pension and Postretirement Items			Total
Accumulated other comprehensive loss at Jan. 1	$	(0.8	)		$	(0.7	)	$	(1.5	)
Losses reclassified from net accumulated other comprehensive loss:
Interest rate derivatives (net of taxes of $0)	0.1			(a)	—			0.1
Net current period other comprehensive income	0.1				—			0.1
Accumulated other comprehensive loss at Dec. 31	$	(0.7	)		$	(0.7	)	$	(1.4	)

^(a) 

Included in interest charges.