Summary of Significant Accounting Policies - Summary of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Amounts reclassified from accumulated other comprehensive income (loss)	$ 1.4	$ 0.4
Settlement cost	13.6	6.0	$ 2.2
Net current period other comprehensive income (loss)	12.9	7.3	(4.2)
Accumulated other comprehensive loss, net of tax	(24.8)	(32.1)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(2.1)	0.9
Accumulated other comprehensive loss, net of tax	(11.9)	(24.8)	(32.1)
Net current period other comprehensive income (loss)	12.9	7.3	(4.2)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net current period other comprehensive income (loss)	(0.2)	(1.4)
Defined Benefit Plans Income Loss [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accumulated other comprehensive income (loss)	(24.9)	(33.9)
Other comprehensive income (loss) before reclassifications	(7.6)	1.4
Amounts reclassified from accumulated other comprehensive income (loss)	1.4	1.6
Net current period other comprehensive income (loss)	7.4	9.0
Accumulated other comprehensive income (loss)	(17.5)	(24.9)	(33.9)
Defined Benefit Plans Income Loss [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accumulated other comprehensive income (loss)	1.1	1.7
Other comprehensive income (loss) before reclassifications	5.5	(0.7)
Amounts reclassified from accumulated other comprehensive income (loss)	0.0	0.1
Net current period other comprehensive income (loss)	5.5	(0.6)
Accumulated other comprehensive income (loss)	6.6	1.1	1.7
Defined Benefit Plan Prior Service Cost [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accumulated other comprehensive income (loss)	(1.2)	(0.2)
Other comprehensive income (loss) before reclassifications	(0.0)	(1.1)
Amounts reclassified from accumulated other comprehensive income (loss)	0.2	0.1
Net current period other comprehensive income (loss)	0.2	(1.0)
Accumulated other comprehensive income (loss)	(1.0)	(1.2)	(0.2)
Defined Benefit Plan Prior Service Cost [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accumulated other comprehensive income (loss)	0.2	1.6
Other comprehensive income (loss) before reclassifications	0.0	0.0
Amounts reclassified from accumulated other comprehensive income (loss)	(0.2)	(1.4)
Accumulated other comprehensive income (loss)	0.0	0.2	1.6
Commodity Contract [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
AOCI, Derivative Qualifying as Hedge, Excluded Component, after Tax	0.0	(1.3)
AOCI, Derivative Qualifying as Hedge, Excluded Component, after Tax	0.0	0.0	$ (1.3)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	0.0	1.3
Amounts reclassified from accumulated other comprehensive income (loss)	0.0	0.0
Net current period other comprehensive income (loss)	0.0	1.3
Settlement Cost [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Settlement cost	13.6	6.0
Settlement Cost [Member] | Defined Benefit Plans Income Loss [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Settlement cost	13.6	6.0
Settlement Cost [Member] | Defined Benefit Plan Prior Service Cost [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Settlement cost	0.0	0.0
Settlement Cost [Member] | Defined Benefit Plan Prior Service Cost [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Settlement cost	0.0	0.0
Settlement Cost [Member] | Commodity Contract [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Settlement cost	$ 0.0	$ 0.0