CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 20.5	$ 106.7
Restricted cash	3.2	3.3
Accounts and other receivables, net	355.4	291.6
Inventories, net	699.8	656.7
Prepaid expenses and other	47.1	47.0
Total current assets	1,126.0	1,105.3
Other assets:
Restricted cash	4.9	4.7
Marketable securities	2.4	3.4
Operating lease right-of-use assets	21.0	20.6
Deferred income taxes	54.1	55.1
Goodwill	2.6	2.6
Other	29.6	27.7
Total other assets	114.6	114.1
Property and equipment:
Land	75.9	74.2
Buildings	261.1	253.9
Equipment	1,346.2	1,306.5
Mining properties	125.8	115.8
Construction in progress	45.5	41.1
Gross property and equipment	1,854.5	1,791.5
Less accumulated depreciation and amortization	1,149.1	1,097.4
Net property and equipment	705.4	694.1
Total assets	1,946.0	1,913.5
Current liabilities:
Current maturities of long-term debt	81.2	78.3
Accounts payable and accrued liabilities	323.4	376.3
Income taxes	25.7	22.0
Total current liabilities	430.3	476.6
Noncurrent liabilities:
Long-term debt	476.0	429.1
Accrued pension costs	119.3	117.5
Operating lease liabilities	17.0	17.1
Deferred income taxes	23.6	24.5
Other	32.8	31.7
Total noncurrent liabilities	668.7	619.9
Stockholders' equity:
Common stock	1.2	1.2
Additional paid-in capital	1,390.3	1,390.3
Retained deficit	(198.7)	(211.0)
Accumulated other comprehensive loss	(345.8)	(363.5)
Total stockholders' equity	847.0	817.0
Total liabilities and stockholders' equity	$ 1,946.0	$ 1,913.5