Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 38.9	$ 51.8
Accounts receivable, net	290.3	234.0
Inventories	331.5	307.2
Prepaid expenses and other current assets	23.9	40.8
Total current assets	684.6	633.8
Property, plant and equipment	2,240.6	2,099.4
Less accumulated depreciation	(717.7)	(673.8)
Property, plant and equipment, net	1,522.9	1,425.6
Goodwill and other intangible assets	74.8	58.9
Investments in affiliated companies	48.4	30.4
Other assets	38.9	38.7
Total assets	2,369.6	2,187.4
Current liabilities:
Current portion of capital lease	0.8
Accounts payable	140.4	148.9
Accrued liabilities	130.4	143.7
Total current liabilities	271.6	292.6
Commitments and contingencies (see Note 11)
Long-term debt	706.8	576.5
Other non-current liabilities	166.1	138.7
Total liabilities	1,144.5	1,007.8
Stockholders' equity:
Common stock, $0.01 par value, 200.0 shares authorized, 106.5 shares and 106.0 shares issued at June 30, 2016 and December 31, 2015	1.1	1.1
Additional paid-in capital	730.2	715.8
Retained earnings	1,147.3	1,044.4
Accumulated other comprehensive loss	(134.5)	(123.9)
Total stockholders' equity including treasury stock value	1,744.1	1,637.4
Less – Treasury stock, at cost, 14.0 shares at June 30, 2016, and 12.5 shares at December 31, 2015	(519.0)	(457.8)
Total stockholders' equity	1,225.1	1,179.6
Total liabilities and stockholders' equity	$ 2,369.6	$ 2,187.4