CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current assets:
Cash, including cash equivalents	$ 100.2	$ 91.8
Short-term investments	26.4	26.5
Accounts receivable, net	176.0	147.2
Inventories	158.2	151.8
Deferred income taxes	7.5	7.9
Other current assets	34.5	46.8
Total current assets	502.8	472.0
Property, plant and equipment	1,184.9	1,136.8
Less accumulated depreciation and amortization	565.7	543.2
Property, plant and equipment, net	619.2	593.6
Investments in affiliated companies	58.3	56.2
Goodwill	112.7	111.5
Deferred income taxes	84.4	85.1
Intangible assets, net	51.2	52.0
Other noncurrent assets	28.7	28.7
Total Assets	1,457.3	1,399.1
Current liabilities:
Notes payable and other current debt	86.5	50.1
Accounts payable	82.7	89.8
Pension and other postretirement benefits	2.3	2.3
Accrued salaries, wages and benefits	37.1	45.0
Income taxes payable	13.3	7.8
Taxes other than income	11.3	9.5
Other current liabilities	69.2	38.7
Total current liabilities	302.4	243.2
Long-term debt	294.9	299.3
Deferred income taxes	20.6	21.6
Pension and other postretirement benefits	111.3	126.0
Other long-term liabilities	33.4	54.1
Total Liabilities	762.6	744.2
Commitments and contingencies (Note 12)
Total Equity	694.7	654.9
Total Liabilities and Equity	$ 1,457.3	$ 1,399.1