Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 127.7	$ 103.3
Accounts receivable, net	160.3	125.4
Inventories	245.7	213.5
Contract assets	30.5	43.1
Prepaid expenses and other current assets	39.5	38.0
Assets held for sale	12.6	12.6
Total current assets	616.3	535.9
Property, plant and equipment	3,110.0	3,139.7
Less accumulated depreciation	(1,363.9)	(1,265.5)
Property, plant and equipment, net	1,746.1	1,874.2
Goodwill and other intangible assets	267.5	277.8
Investments in affiliated companies	44.6	44.7
Other assets	144.9	185.2
Total assets	2,819.4	2,917.8
Current liabilities:
Short-term borrowings	0.9	0.9
Accounts payable	113.2	70.0
Accrued compensation and benefits	54.4	43.2
Financial instruments	5.7	3.6
Accrued liabilities	73.4	65.4
Total current liabilities	247.6	183.1
Long-term debt	822.4	925.5
Retirement obligations	52.6	53.9
Deferred income taxes	140.0	153.0
Other non-current liabilities	71.3	92.1
Total liabilities	1,333.9	1,407.6
Stockholders' equity:
Common stock, $0.01 par value, 200.0 shares authorized, 110.0 shares and 109.7 shares issued at December 31, 2021 and 2020, respectively	1.1	1.1
Additional paid-in capital	878.6	849.7
Retained earnings	2,012.5	1,996.4
Accumulated other comprehensive loss	(126.5)	(59.6)
Total stockholders' equity including treasury stock value	2,765.7	2,787.6
Less – Treasury stock, at cost, 26.1 shares at December 31, 2021 and 26.1 shares at December 31, 2020	(1,280.2)	(1,277.4)
Total stockholders' equity	1,485.5	1,510.2
Total liabilities and stockholders' equity	$ 2,819.4	$ 2,917.8