Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 64.4	$ 32.7
Accounts receivable, net	227.6	260.9
Inventories	333.1	297.8
Contract assets	52.7	50.5
Prepaid expenses and other current assets	27.1	33.9
Total current assets	704.9	675.8
Property, plant and equipment	3,075.1	2,902.1
Less accumulated depreciation	(1,132.3)	(1,025.6)
Property, plant and equipment, net	1,942.8	1,876.5
Goodwill and other intangible assets	280.4	142.3
Investments in affiliated companies	46.5	48.7
Other assets	154.0	80.8
Total assets	3,128.6	2,824.1
Current liabilities:
Short-term borrowings	9.5	9.4
Accounts payable	157.6	161.9
Accrued compensation and benefits	74.4	75.8
Financial instruments	17.7	9.7
Accrued liabilities	63.4	69.9
Total current liabilities	322.6	326.7
Commitments and contingencies (see Note 15)
Long-term debt	1,050.6	947.4
Retirement obligations	53.3	42.0
Deferred income taxes	155.7	144.7
Other non-current liabilities	100.3	41.3
Total liabilities	1,682.5	1,502.1
Stockholders’ equity:
Common stock, $0.01 par value, 200.0 shares authorized, 109.3 shares and 108.5 shares issued at December 31, 2019 and 2018, respectively	1.1	1.1
Additional paid-in capital	829.9	798.3
Retained earnings	1,978.9	1,726.5
Accumulated other comprehensive loss	(118.7)	(108.0)
Total stockholders' equity including treasury stock value	2,691.2	2,417.9
Less – Treasury stock, at cost, 25.7 shares and 23.7 shares at December 31, 2019 and 2018, respectively	(1,245.1)	(1,095.9)
Total stockholders’ equity	1,446.1	1,322.0
Total liabilities and stockholders’ equity	$ 3,128.6	$ 2,824.1