Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings	$ 46.0	$ (28.1)	$ 77.1
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	103.3	105.0	111.0
Equity-based compensation expense	12.7	9.1	10.5
Deferred Income Taxes and Tax Credits	(7.9)	(9.7)	33.5
Defined benefit pension and other postretirement employee benefits	3.0	7.2	3.8
Amortization of deferred debt costs and debt retirement	2.0	2.8	8.0
(Gain) loss on sale or impairment associated with assets	6.1	35.7	(1.4)
(Increase) decrease in accounts receivable	(16.9)	(5.3)	6.1
(Increase) decrease in inventory	(46.3)	(20.2)	18.1
Increase in other current assets	(2.4)	(1.7)	(11.2)
Increase (Decrease) in Accounts Payable and Accrued Liabilities	49.2	1.9	(12.0)
Other, net	1.5	(0.2)	3.4
Net cash flows provided by operating activities	150.2	96.4	247.0
CASH FLOWS FROM INVESTING ACTIVITIES
Payments to Acquire Property, Plant, and Equipment	(33.5)	(38.4)	(39.6)
Net proceeds from divested assets	0.0	13.3	0.0
Net cash flows used in investing activities	(33.5)	(25.1)	(39.6)
CASH FLOWS FROM FINANCING ACTIVITIES
Borrowings of short-term debt	0.0	0.0	108.5
Repayments of short-term debt	0.0	0.0	(122.0)
Borrowings of long-term debt	0.0	0.0	275.0
Repayment of long-term debt	(80.9)	(81.0)	(449.4)
Payment, Tax Withholding, Share-based Payment Arrangement	(2.5)	(1.7)	(0.7)
Payments for Repurchase of Common Stock	(5.0)	0.0	0.0
Payments for debt issuance costs	(0.9)	0.0	(4.4)
Other, net	0.8	0.7	0.0
Net cash flows used in financing activities	(88.6)	(82.0)	(192.9)
Increase (decrease) in cash, cash equivalents and restricted cash	28.2	(10.7)	14.4
Cash, cash equivalents and restricted cash at beginning of period	54.4	26.2	36.9
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid for interest, net of amounts capitalized	33.0	36.0	45.0
Cash (received) paid for income taxes	43.0	(7.7)	(7.9)
Capital Expenditures Incurred but Not yet Paid	$ 15.7	$ 11.0	$ 12.1