Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 35.3	$ 70.9
Accounts receivable, net	283.7	233.5
Inventories	326.8	290.1
Prepaid expenses and other current assets	106.2	87.2
Total current assets	752.0	681.7
Property, plant and equipment	1,974.5	1,868.7
Less accumulated depreciation	(646.8)	(630.5)
Property, plant and equipment, net	1,327.7	1,238.2
Goodwill and other intangible assets	59.5	59.8
Investments in affiliated companies	33.9	34.2
Other assets	27.0	22.5
Total assets	2,200.1	2,036.4
Current liabilities:
Short-term borrowings		1.3
Accounts payable	146.0	175.0
Accrued liabilities	134.9	134.3
Total current liabilities	$ 280.9	$ 310.6
Commitments and contingencies (see Note 11)
Long-term debt	$ 508.0	$ 415.0
Other non-current liabilities	164.2	160.9
Total liabilities	953.1	886.5
Stockholders' equity:
Common stock, $0.01 par value, 200.0 shares authorized, 105.9 shares and 104.8 shares issued at June 30, 2015 and December 31, 2014	1.1	1.0
Additional paid-in capital	709.7	678.5
Retained earnings	956.1	845.5
Accumulated other comprehensive (loss) income	(108.5)	(69.7)
Total stockholders' equity including treasury stock value	1,558.4	1,455.3
Less – Treasury stock, at cost, 9.5 shares at June 30, 2015, and 9.3 shares at December 31, 2014	(311.4)	(305.4)
Total stockholders' equity	1,247.0	1,149.9
Total liabilities and stockholders' equity	$ 2,200.1	$ 2,036.4