Accumulated Other Comprehensive Income (Loss)

12 Months Ended

Dec. 31, 2022

Equity [Abstract]

Accumulated Other Comprehensive Income (Loss)

11. Accumulated Other Comprehensive Income (Loss)

The following table presents the changes in the accumulated balances for each component of AOCI (in millions of dollars):

	Year Ended December 31,
	2022			2021			2020
Defined Benefit Plans:
Beginning balance	$	(21.4	)	$	(19.8	)	$	(33.2	)
Actuarial gain arising during the period		27.0			8.0			0.4
Less: income tax expense		(6.5	)		(1.9	)		(0.1	)
Net actuarial gain arising during the period		20.5			6.1			0.3
Prior service credit (cost) arising during the period		—			(14.0	)		12.3
Less: income tax benefit (expense)		—			3.3			(3.0	)
Net prior service credit (cost) arising during the period		—			(10.7	)		9.3
Amortization of net actuarial loss1		—			0.4			0.4
Amortization of prior service cost1		4.9			3.5			4.7
Less: income tax expense2		(1.2	)		(0.9	)		(1.2	)
Net amortization reclassified from AOCI to Net (loss) income		3.7			3.0			3.9
Translation impact on Canadian pension plan AOCI balance		—			—			(0.1	)
Other comprehensive income (loss), net of tax		24.2			(1.6	)		13.4
Ending balance	$	2.8		$	(21.4	)	$	(19.8	)
Available for Sale Securities:
Beginning balance	$	—		$	—		$	0.3
Unrealized gain on available for sale securities		—			—			1.3
Less: income tax benefit (expense)		—			—			(0.7	)
Net unrealized gain on available for sale securities		—			—			0.6
Reclassification of unrealized loss (gain) upon sale of    available for sale securities3		—			—			(2.0	)
Less: income tax benefit2		—			—			1.1
Net loss (gain) reclassified from AOCI to Net (loss) income		—			—			(0.9	)
Other comprehensive income (loss), net of tax		—			—			(0.3	)
Ending balance	$	—		$	—		$	—
Cash Flow Hedges:
Beginning balance	$	17.7		$	1.1		$	(5.6	)
Unrealized (loss) gain on cash flow hedges		(12.2	)		63.6			(9.4	)
Less: income tax benefit (expense)		2.9			(15.0	)		2.3
Net unrealized (loss) gain on cash flow hedges		(9.3	)		48.6			(7.1	)
Reclassification of unrealized (gain) loss upon settlement    of cash flow hedges		(10.5	)		(41.9	)		17.4
Reclassification due to forecasted transactions no longer    probable of occurring		—			—			0.8
Less: income tax benefit (expense)2		2.5			9.9			(4.4	)
Net (gain) loss reclassified from AOCI to Net (loss) income		(8.0	)		(32.0	)		13.8
Other comprehensive (loss) income, net of tax		(17.3	)		16.6			6.7
Ending balance4	$	0.4		$	17.7		$	1.1
Fair Value Hedges:
Beginning balance	$	—		$	—		$	—
Unrealized gain (loss) on fair value hedges		—			—			(1.0	)
Less: income tax benefit		—			—			0.2
Net unrealized gain (loss) on fair value hedges		—			—			(0.8	)
Excluded component amortized from OCI to Net (loss) income		—			—			0.4
Reclassification due to cancellation of firm commitment		—			—			0.6
Less: income tax benefit (expense)2		—			—			(0.2	)
Net loss reclassified from AOCI to Net (loss) income		—			—			0.8
Other comprehensive income, net of tax		—			—			—
Ending balance	$	—		$	—		$	—
Foreign Currency Translation:
Beginning balance	$	—		$	—		$	(0.1	)
Other comprehensive income, net of tax		—			—			0.1
Ending balance	$	—		$	—		$	—
Total AOCI ending balance	$	3.2		$	(3.7	)	$	(18.7	)

1.Amounts amortized out of AOCI related to pension and other postretirement benefits were included within Net periodic postretirement benefit cost (see Note 5).

2.Income tax amounts reclassified out of AOCI were included as a component of Income tax benefit (provision).

3.Amounts reclassified out of AOCI relating to sales of available for sale securities were included as a component of Other income (expense), net. We use the specific identification method to determine the amount reclassified out of AOCI.

4.As of December 31, 2022, we estimate a net mark-to-market loss before tax of $1.7 million in AOCI will be reclassified into Net (loss) income upon settlement within the next 12 months.