Accumulated Other Comprehensive Income - Schedule of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2025		Dec. 31, 2024		Dec. 31, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		$ 743.1	[1]	$ 708.4	[2]	$ 631.2	[2]
Other comprehensive (loss) income, net of tax		6.3	[2]	7.4	[3]	9.9	[3]
Ending balance		826.1	[2]	743.1	[1]	708.4	[2]
Defined Benefit Plans:
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		19.1		11.0		2.8
Less: income tax benefit (expense)	[4]	(0.3)		(0.1)		(1.0)
Net (gain) loss reclassified from AOCI to Net income (loss)		1.2		0.4		3.2
Other comprehensive (loss) income, net of tax		3.4		8.1		8.2
Ending balance		22.5		19.1		11.0
Defined Benefit Plans: Net Actuarial Gain
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Unrealized gain (loss) on cash flow hedges		2.9		12.2		4.3
Less: income tax (expense) benefit		(0.7)		(2.8)		(1.0)
Net unrealized gain (loss) on available for sale securities, cash flow hedges and fair value hedges		2.2		9.4		3.3
Reclassification from AOCI	[5],[6]	(2.4)		(2.0)		(1.1)
Defined Benefit Plans: Net Prior Service (Cost) Credit
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Unrealized gain (loss) on cash flow hedges				(2.2)		2.2
Less: income tax (expense) benefit				0.5		(0.5)
Net unrealized gain (loss) on available for sale securities, cash flow hedges and fair value hedges				(1.7)		1.7
Reclassification from AOCI	[6]	3.9		2.5		5.3
Cash Flow Hedges:
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		1.4	[7]	2.1	[7]	0.4
Unrealized gain (loss) on cash flow hedges		35.9		(0.2)		(10.7)
Less: income tax (expense) benefit		(8.4)				2.5
Net unrealized gain (loss) on available for sale securities, cash flow hedges and fair value hedges		27.5		(0.2)		(8.2)
Reclassification from AOCI		(32.1)		(0.9)		12.9
Reclassification due to forecasted transactions probable of not occurring				0.2
Less: income tax benefit (expense)	[4]	7.5		0.2		(3.0)
Net (gain) loss reclassified from AOCI to Net income (loss)		(24.6)		(0.5)		9.9
Other comprehensive (loss) income, net of tax		2.9		(0.7)		1.7
Ending balance	[7]	4.3		1.4		2.1
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		20.5		13.1		3.2
Other comprehensive (loss) income, net of tax		6.3		7.4		9.9
Ending balance		$ 26.8		$ 20.5		$ 13.1

[1] Adjusted to reflect the retrospective change in inventory valuation methodology from LIFO to WAC. See Note 18 for further discussion.

[2] Adjusted to reflect the retrospective change in inventory valuation methodology from LIFO to WAC. See Note 18 for further discussion.

[3] Adjusted to reflect the retrospective change in inventory valuation methodology from LIFO to WAC. See Note 18 for further discussion.

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

[5] Amounts amortized out of AOCI during the year ended December 31, 2024 include net actuarial gains recognized on a pro-rata basis in conjunction with a group annuity purchase (see Note 5).

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

[7] As of December 31, 2025, we estimate a net mark-to-market gain before tax of $5.2 million in AOCI will be reclassified into Net income upon settlement within the next 12 months.