Accumulated Other Comprehensive Income - Schedule of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		$ 631.2	$ 692.5
Other comprehensive (loss) income, net of tax		(1.1)	18.0
Ending balance		635.6	708.2
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		2.8	(21.4)
Less: income tax benefit	[1]	(0.2)	(0.3)
Other comprehensive (loss) income, net of tax		0.7	0.9
Ending balance		3.5	(20.5)
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Reclassification from AOCI	[2]	(0.3)
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	1.2
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		0.4	17.7
Unrealized (loss) gain on cash flow hedges		(2.6)	42.3
Less: income tax (expense) benefit		0.6	(10.0)
Net unrealized (loss) gain on cash flow hedges		(2.0)	32.3
Reclassification from AOCI		0.2	(19.9)
Less: income tax benefit	[1]		4.7
Net loss (gain) reclassified from AOCI to Net income		0.2	(15.2)
Other comprehensive (loss) income, net of tax		(1.8)	17.1
Ending balance	[3]	(1.4)	34.8
AOCI Attributable to Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		3.2	(3.7)
Other comprehensive (loss) income, net of tax		(1.1)	18.0
Ending balance		$ 2.1	$ 14.3

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

[2] Amounts amortized out of AOCI related to pension and other postretirement benefits were included within Net periodic postretirement benefit cost (see Note 3).

[3] As of March 31, 2023, we estimate a net mark-to-market loss before tax of $3.0 million in AOCI will be reclassified into Net income upon settlement within the next 12 months.