Condensed Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 37.7	$ 65.5
Accounts receivable	255.6	232.4
Inventories	300.7	265.3
Prepaid expenses and other current assets	74.5	93.2
Total current assets	668.5	656.4
Property, plant and equipment	1,808.3	1,661.2
Less accumulated depreciation	(630.5)	(593.8)
Property, plant and equipment, net	1,177.8	1,067.4
Goodwill and intangible assets	60.4	61.0
Investments in affiliated companies	24.3	23.3
Other assets	28.8	28.0
Total assets	1,959.8	1,836.1
Current liabilities:
Short-term borrowings	2.8	3.0
Accounts payable	131.2	135.9
Accrued liabilities	125.7	129.8
Total current liabilities	259.7	268.7
Long-term debt	430.0	292.0
Other non-current liabilities	142.9	115.0
Total liabilities	832.6	675.7
Stockholders’ equity:
Common stock, $0.01 par value, 200.0 shares authorized, 104.7 and 104.0 shares issued at September 30, 2014 and December 31, 2013, respectively	1.0	1.0
Additional paid-in capital	674.2	642.3
Retained earnings	792.6	636.1
Accumulated other comprehensive income	(35.2)	10.7
Total stockholders' equity including treasury stock value	1,432.6	1,290.1
Less — Treasury stock, at cost, 9.3 shares at September 30, 2014 and 5.1 shares at December 31, 2013	(305.4)	(129.7)
Total stockholders’ equity	1,127.2	1,160.4
Total liabilities and stockholders’ equity	$ 1,959.8	$ 1,836.1