Accumulated Other Comprehensive (Loss) Income - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions		3 Months Ended								9 Months Ended
		Sep. 30, 2022		Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021		Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022		Sep. 30, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		$ 650.0		$ 708.2	$ 692.5	$ 720.7		$ 735.0	$ 732.4	$ 692.5		$ 732.4
Other comprehensive (loss) income, net of tax		(0.4)		(35.6)	18.0	10.8		15.9	9.1	(18.0)		35.8
Ending balance		642.0		650.0	708.2	721.0		720.7	735.0	642.0		721.0
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		(19.6)			(21.4)	(18.4)			(19.8)	(21.4)		(19.8)
Less: income tax (expense) benefit	[1]	(0.2)				(0.2)				(0.9)		(0.7)
Other comprehensive (loss) income, net of tax		1.0				0.8				2.8		2.2
Ending balance		(18.6)		(19.6)		(17.6)		(18.4)		(18.6)		(17.6)
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Reclassification from AOCI	[2]					0.1						0.3
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Reclassification from AOCI	[2]	1.2				0.9				3.7		2.6
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		(1.7)			17.7	24.8			1.1	17.7		1.1
Unrealized (loss) gain on cash flow hedges		(9.8)				29.8				(18.2)		72.1
Less: income tax benefit (expense)		2.2				(7.0)				4.2		(17.0)
Net unrealized (loss) gain on cash flow hedges		(7.6)				22.8				(14.0)		55.1
Reclassification from AOCI		8.1				(16.7)				(8.9)		(28.1)
Less: income tax (expense) benefit	[1]	(1.9)				3.9				2.1		6.7
Net loss (gain) reclassified from AOCI to Net income (loss)		6.2				(12.8)				(6.8)		(21.4)
Other comprehensive (loss) income, net of tax		(1.4)				10.0				(20.8)		33.7
Ending balance		(3.1)	[3]	(1.7)		34.8	[3]	24.8		(3.1)	[3]	34.8	[3]
AOCI, Accumulated Foreign Currency Adjustment Attributable to Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance						(0.1)
Other comprehensive (loss) income, net of tax												(0.1)
Ending balance						(0.1)		(0.1)				(0.1)
AOCI Attributable to Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		(21.3)		14.3	(3.7)	6.3		(9.6)	(18.7)	(3.7)		(18.7)
Other comprehensive (loss) income, net of tax		(0.4)		(35.6)	18.0	10.8		15.9	9.1
Ending balance		$ (21.7)		$ (21.3)	$ 14.3	$ 17.1		$ 6.3	$ (9.6)	$ (21.7)		$ 17.1

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

[2] Amounts amortized out of AOCI relating to Salaried VEBA adjustments were included within Other income (expense), net, as a component of Net periodic postretirement benefit cost relating to Salaried VEBA.

[3] As of September 30, 2022, we estimate a net mark-to-market loss before tax of $7.6 million in AOCI will be reclassified into Net income (loss) upon settlement within the next 12 months.