Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 32.6	$ 49.5
Accounts receivable, net	229.0	199.3
Inventories, net	232.8	215.7
Prepaid expenses and other current assets	81.3	59.8
Total current assets	575.7	524.3
Property, plant and equipment, net	914.4	722.1
Goodwill and other intangible assets	57.8	57.4
Investments in affiliated companies	22.6	21.7
Deferred tax assets	15.4	33.0
Other assets	17.2	17.6
Total assets	1,603.1	1,376.1
Current liabilities:
Short-term borrowings and current maturities of long-term debt	16.6	12.6
Accounts payable	115.7	141.7
Accrued compensation and benefits	58.8	57.5
Other accrued liabilities	44.2	35.7
Total current liabilities	235.3	247.5
Long-term notes payable and capital lease obligations	240.0	238.3
Long-term retirement obligations	81.3	68.5
Other non-current liabilities	52.4	19.6
Total liabilities	609.0	573.9
Commitments and contingencies (see Note 14)
Stockholders' equity:
Common stock, $0.01 par value, 200.0 shares of stock authorized, 102.4 and 101.0 shares of stock issued at December 31, 2012 and 2011, respectively	1.0	1.0
Additional paid-in capital	617.0	589.2
Retained earnings	448.2	283.9
Accumulated other comprehensive loss	(31.9)	(39.8)
Total stockholders' equity including treasury stock value	1,034.3	834.3
Less: Treasury stock, at cost, 2.5 and 2.2 shares at December 31, 2012 and 2011, respectively	(40.2)	(32.1)
Total stockholders' equity	994.1	802.2
Total liabilities and stockholders' equity	$ 1,603.1	$ 1,376.1