Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 65.5	$ 32.6
Accounts receivable, net	232.4	229.0
Inventories	265.3	232.8
Prepaid expenses and other current assets	93.2	81.3
Total current assets	656.4	575.7
Property, plant and equipment, net	1,067.4	914.4
Goodwill and other intangible assets	61.0	57.8
Investments in affiliated companies	23.3	22.6
Deferred tax assets	10.3	15.4
Other assets	17.7	17.2
Total assets	1,836.1	1,603.1
Current liabilities:
Short-term borrowings and current maturities of long-term debt	3.0	16.6
Accounts payable	135.9	115.7
Accrued compensation and benefits	89.2	58.8
Other accrued liabilities	40.6	44.2
Total current liabilities	268.7	235.3
Long-term notes payable and capital lease obligations	292.0	240.0
Long-term retirement obligations	41.1	81.3
Other non-current liabilities	73.9	52.4
Total liabilities	675.7	609.0
Commitments and contingencies (see Note 13)
Stockholders' equity:
Common stock, $0.01 par value, 200.0 shares of stock authorized, 104.0 and 102.4 shares of stock issued at December 31, 2013 and 2012, respectively	1.0	1.0
Additional paid-in capital	642.3	617.0
Retained earnings	636.1	448.2
Accumulated other comprehensive income (loss)	10.7	(31.9)
Total stockholders' equity including treasury stock value	1,290.1	1,034.3
Less: Treasury stock, at cost, 5.1 and 2.5 shares at December 31, 2013 and 2012, respectively	(129.7)	(40.2)
Total stockholders' equity	1,160.4	994.1
Total liabilities and stockholders' equity	$ 1,836.1	$ 1,603.1