Financial Information for Subsidiary and Guarantor Parent (B.S.) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,026.8	$ 304.6	$ 380.6	$ 432.3
Accounts receivable, net	528.2	613.3
Intercompany notes receivable	0	0
Inventories, net	1,322.1	1,536.6
Prepaid expenses and other current assets	67.6	56.1
Current assets from discontinued operations	6.1	0
Total Current Assets	2,950.8	2,510.6
Property, plant and equipment, net	2,874.1	2,559.9
Cost in excess of net assets acquired	727.9	740.1
Deferred income taxes	0	71.5
Intercompany notes receivable	0	0
Investments in subsidiaries	0	0
Other assets	342.0	365.7
Noncurrent assets of discontinued operations	3.7	0
Total Assets	6,898.5	6,247.8	6,046.9
Accounts payable	471.8	499.9
Accrued liabilities	310.9	330.5
Intercompany notes payable	0	0
Deferred income taxes	3.5	24.0
Short-term debt and current portion of long-term debt	419.9	17.1
Current liabilities of discontinued operations	4.9	0
Total Current Liabilities	1,211.0	871.5
Long-term debt	1,527.4	1,463.0
Intercompany notes payable	0	0
Accrued postretirement benefits	442.4	495.2
Pension liabilities	368.2	721.1
Deferred income taxes	206.6	0
Other long-term liabilities	148.2	109.9
Total Liabilities	3,903.8	3,660.7
Total Stockholders’ Equity	2,994.7	2,587.1	2,571.6	2,129.4
Total Liabilities and Stockholders’ Equity	6,898.5	6,247.8
Guarantor Parent [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	3.6	5.5
Accounts receivable, net	0.3	0.4
Intercompany notes receivable	0	0
Inventories, net	0	0
Prepaid expenses and other current assets	26.2	1.1
Current assets from discontinued operations	0
Total Current Assets	30.1	7.0
Property, plant and equipment, net	2.9	3.9
Cost in excess of net assets acquired	0	0
Deferred income taxes		71.5
Intercompany notes receivable	0	0
Investments in subsidiaries	6,170.8	5,545.4
Other assets	35.7	50.5
Noncurrent assets of discontinued operations	0
Total Assets	6,239.5	5,678.3
Accounts payable	3.1	5.3
Accrued liabilities	51.6	64.0
Intercompany notes payable	825.6	1,073.4
Deferred income taxes	3.5	24.0
Short-term debt and current portion of long-term debt	402.9	0.3
Current liabilities of discontinued operations	0
Total Current Liabilities	1,286.7	1,167.0
Long-term debt	1,350.8	1,253.4
Intercompany notes payable	0	0
Accrued postretirement benefits	0	0
Pension liabilities	323.0	651.7
Deferred income taxes	206.6
Other long-term liabilities	77.7	19.1
Total Liabilities	3,244.8	3,091.2
Total Stockholders’ Equity	2,994.7	2,587.1
Total Liabilities and Stockholders’ Equity	6,239.5	5,678.3
Subsidiary [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	13.5	13.1
Accounts receivable, net	179.4	190.1
Intercompany notes receivable	0	0
Inventories, net	295.5	311.1
Prepaid expenses and other current assets	6.5	10.2
Current assets from discontinued operations	0
Total Current Assets	494.9	524.5
Property, plant and equipment, net	1,397.5	882.2
Cost in excess of net assets acquired	112.1	112.1
Deferred income taxes		0
Intercompany notes receivable	0	0
Investments in subsidiaries	37.7	33.7
Other assets	32.0	35.5
Noncurrent assets of discontinued operations	0
Total Assets	2,074.2	1,588.0
Accounts payable	310.5	262.6
Accrued liabilities	56.6	62.2
Intercompany notes payable	763.8	216.5
Deferred income taxes	0	0
Short-term debt and current portion of long-term debt	0.1	0.1
Current liabilities of discontinued operations	0
Total Current Liabilities	1,131.0	541.4
Long-term debt	150.4	150.5
Intercompany notes payable	200.0	200.1
Accrued postretirement benefits	179.7	198.2
Pension liabilities	5.6	5.1
Deferred income taxes	0
Other long-term liabilities	20.2	20.8
Total Liabilities	1,686.9	1,116.1
Total Stockholders’ Equity	387.3	471.9
Total Liabilities and Stockholders’ Equity	2,074.2	1,588.0
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	1,009.7	286.0
Accounts receivable, net	348.5	422.8
Intercompany notes receivable	1,589.4	1,289.9
Inventories, net	1,026.6	1,225.5
Prepaid expenses and other current assets	34.9	44.8
Current assets from discontinued operations	6.1
Total Current Assets	4,015.2	3,269.0
Property, plant and equipment, net	1,473.7	1,673.8
Cost in excess of net assets acquired	615.8	628.0
Deferred income taxes		0
Intercompany notes receivable	200.0	200.1
Investments in subsidiaries	0	0
Other assets	274.3	279.7
Noncurrent assets of discontinued operations	3.7
Total Assets	6,582.7	6,050.6
Accounts payable	158.2	232.0
Accrued liabilities	202.7	204.3
Intercompany notes payable	0	0
Deferred income taxes	0	0
Short-term debt and current portion of long-term debt	16.9	16.7
Current liabilities of discontinued operations	4.9
Total Current Liabilities	382.7	453.0
Long-term debt	26.2	59.1
Intercompany notes payable	0	0
Accrued postretirement benefits	262.7	297.0
Pension liabilities	39.6	64.3
Deferred income taxes	0
Other long-term liabilities	50.3	70.0
Total Liabilities	761.5	943.4
Total Stockholders’ Equity	5,821.2	5,107.2
Total Liabilities and Stockholders’ Equity	6,582.7	6,050.6
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	0	0
Accounts receivable, net	0	0
Intercompany notes receivable	(1,589.4)	(1,289.9)
Inventories, net	0	0
Prepaid expenses and other current assets	0	0
Current assets from discontinued operations	0
Total Current Assets	(1,589.4)	(1,289.9)
Property, plant and equipment, net	0	0
Cost in excess of net assets acquired	0	0
Deferred income taxes		0
Intercompany notes receivable	(200.0)	(200.1)
Investments in subsidiaries	(6,208.5)	(5,579.1)
Other assets	0	0
Noncurrent assets of discontinued operations	0
Total Assets	(7,997.9)	(7,069.1)
Accounts payable	0	0
Accrued liabilities	0	0
Intercompany notes payable	(1,589.4)	(1,289.9)
Deferred income taxes	0	0
Short-term debt and current portion of long-term debt	0	0
Total Current Liabilities	(1,589.4)	(1,289.9)
Long-term debt	0	0
Intercompany notes payable	(200.0)	(200.1)
Accrued postretirement benefits	0	0
Pension liabilities	0	0
Deferred income taxes	0
Other long-term liabilities	0	0
Total Liabilities	(1,789.4)	(1,490.0)
Total Stockholders’ Equity	(6,208.5)	(5,579.1)
Total Liabilities and Stockholders’ Equity	$ (7,997.9)	$ (7,069.1)