Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions		6 Months Ended
	Aug. 02, 2022	Jun. 16, 2022	Sep. 30, 2022	Dec. 31, 2021
Loss Contingencies [Line Items]
Liabilities subject to compromise			$ 0.0	$ 6,397.7
Environmental liabilities			37.5
Environmental liabilities			36.4	43.0
Shenk Litigation Matter
Loss Contingencies [Line Items]
Payments for Legal Settlements	$ 65.8
Crab Orchard National Wildlife Refuge Superfund Site
Loss Contingencies [Line Items]
Environmental liabilities		$ 57.4
Environmental Remediation Expense		$ 11.1
Accrued and other current liabilities
Loss Contingencies [Line Items]
Environmental liabilities, current			1.1
Other Noncurrent Liabilities
Loss Contingencies [Line Items]
Interest Payable, Installment Sales				$ 12.4
Minimum
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss			18.8
Maximum
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss			$ 48.2