Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 126.4	$ 124.9
Accounts receivable, net of allowance for doubtful accounts and customer deductions of $12.4 million and $11.3 million as of March 31, 2015, and December 31, 2014, respectively	676.7	646.1
Inventories	687.6	664.9
Prepaid expenses and other current assets	65.7	61.9
Federal and state income taxes receivable	0	5.1
Deferred income taxes	58.4	75.7
Total current assets	1,614.8	1,578.6
Property, plant, and equipment, net	2,864.1	2,857.6
Goodwill	546.6	546.8
Intangible assets, net	287.8	293.5
Other long-term assets	72.1	72.0
Total assets	5,385.4	5,348.5
Current liabilities:
Current maturities of long-term debt	6.5	6.5
Capital lease obligations	1.1	1.1
Accounts payable	352.7	330.5
Dividends payable	54.1	39.4
Federal and state income taxes payable	24.1	0
Accrued liabilities	164.0	220.0
Accrued interest	18.8	13.5
Total current liabilities	621.3	611.0
Long-term liabilities:
Long-term debt	2,347.4	2,348.9
Capital lease obligations	22.5	22.8
Deferred income taxes	399.9	409.9
Pension and postretirement benefit plans	367.8	361.7
Other long-term liabilities	70.2	72.8
Total long-term liabilities	3,207.8	3,216.1
Commitments and contingent liabilities
Stockholders' equity:
Common stock, par value $0.01 per share, 300,000 shares authorized, 98.3 million and 98.4 million shares issued as of March 31, 2015, and December 31, 2014, respectively	1.0	1.0
Additional paid in capital	436.0	432.1
Retained earnings	1,271.6	1,242.2
Accumulated other comprehensive loss	(152.3)	(153.9)
Total stockholders' equity	1,556.3	1,521.4
Total liabilities and stockholders' equity	$ 5,385.4	$ 5,348.5