CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 295.7	$ 780.3
Receivables:
Trade receivables, net	361.6	112.8
Other	44.5	11.6
Contract assets	40.2	36.1
Inventories	413.6	152.0
Prepaid expenses and other current assets	67.7	28.6
Total current assets	1,223.3	1,121.4
Property, plant and equipment, net	948.7	627.2
Operating lease assets	45.2	26.5
Intangible assets, net	70.5	26.7
Goodwill	39.3	18.8
Other assets	110.2	44.1
Total	2,437.2	1,864.7
Current liabilities:
Accounts payable	340.7	86.1
Accrued salaries, wages and related expenses	48.9	30.8
Other accrued liabilities	55.2	41.4
Total current liabilities	444.8	158.3
Long-term portion of operating lease liabilities	40.2	25.6
Pension and other postretirement benefits	89.2	1.3
Net liabilities of Salaried VEBA	16.6	17.8
Deferred tax liabilities	15.0	13.9
Long-term liabilities	74.5	77.3
Long-term debt	1,035.9	838.1
Total liabilities	1,716.2	1,132.3
Commitments and contingencies
Stockholders’ equity:
Preferred stock, 5,000,000 shares authorized at both September 30, 2021 and December 31, 2020; no shares were issued and outstanding at September 30, 2021 and December 31, 2020
Common stock, par value $0.01, 90,000,000 shares authorized at both September 30, 2021 and December 31, 2020; 22,697,958 shares issued and 15,862,672 shares outstanding at September 30, 2021; 22,647,455 shares issued and 15,812,169 shares outstanding at December 31, 2020	0.2	0.2
Additional paid in capital	1,076.6	1,068.6
Retained earnings	103.0	158.2
Treasury stock, at cost, 6,835,286 shares at both September 30, 2021 and December 31, 2020	(475.9)	(475.9)
Accumulated other comprehensive income (loss)	17.1	(18.7)
Total stockholders’ equity	721.0	732.4
Total	$ 2,437.2	$ 1,864.7