Guarantor Condensed Consolidating Financial Statements - Balance Sheets (Details) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2014
Current Assets:
Cash and Cash Equivalents	$ 38.7	$ 54.9	$ 46.8	$ 81.6
Receivables, Net	501.2	423.9
Inventories, Net	589.9	557.1
Intercompany	0.0	0.0
Other Current Assets	39.2	30.9
Total Current Assets	1,169.0	1,066.8
Property, Plant and Equipment, Net	1,746.9	1,586.4
Investment in Consolidated Subsidiaries	0.0	0.0
Goodwill	1,267.8	1,167.8
Other Assets	536.3	435.1
Total Assets	4,720.0	4,256.1
Current Liabilities:
Short-Term Debt and Current Portion of Long-Term Debt	61.8	36.6
Accounts Payable	422.0	457.9
Intercompany	0.0	0.0
Other Accrued Liabilities	242.5	237.7
Total Current Liabilities	726.3	732.2
Long-Term Debt	2,212.9	1,838.9
Deferred Income Tax Liabilities	345.3	266.7
Other Noncurrent Liabilities	348.9	316.6
EQUITY
Total Equity	1,086.6	1,101.7
Total Liabilities and Shareholders' Equity	4,720.0	4,256.1
Reportable Legal Entities | Parent
Current Assets:
Cash and Cash Equivalents	0.0	0.0	0.0	0.0
Receivables, Net	0.0	0.0
Inventories, Net	0.0	0.0
Intercompany	0.0	0.0
Other Current Assets	0.0	0.0
Total Current Assets	0.0	0.0
Property, Plant and Equipment, Net	0.0	0.0
Investment in Consolidated Subsidiaries	1,274.9	1,176.8
Goodwill	0.0	0.0
Other Assets	0.0	0.0
Total Assets	1,274.9	1,176.8
Current Liabilities:
Short-Term Debt and Current Portion of Long-Term Debt	0.0	0.0
Accounts Payable	0.0	0.0
Intercompany	188.3	75.1
Other Accrued Liabilities	0.0	0.0
Total Current Liabilities	188.3	75.1
Long-Term Debt	0.0	0.0
Deferred Income Tax Liabilities	0.0	0.0
Other Noncurrent Liabilities	0.0	0.0
EQUITY
Total Equity	1,086.6	1,101.7
Total Liabilities and Shareholders' Equity	1,274.9	1,176.8
Reportable Legal Entities | Subsidiary Issuer
Current Assets:
Cash and Cash Equivalents	0.0	0.1	11.3	2.0
Receivables, Net	237.9	217.0
Inventories, Net	399.7	408.8
Intercompany	988.8	656.4
Other Current Assets	26.1	19.2
Total Current Assets	1,652.5	1,301.5
Property, Plant and Equipment, Net	1,422.8	1,358.0
Investment in Consolidated Subsidiaries	0.0	0.0
Goodwill	1,089.8	1,042.8
Other Assets	352.9	334.7
Total Assets	4,518.0	4,037.0
Current Liabilities:
Short-Term Debt and Current Portion of Long-Term Debt	25.3	25.5
Accounts Payable	311.6	342.8
Intercompany	0.0	0.0
Other Accrued Liabilities	180.4	191.8
Total Current Liabilities	517.3	560.1
Long-Term Debt	2,127.6	1,761.4
Deferred Income Tax Liabilities	273.9	249.2
Other Noncurrent Liabilities	324.3	289.5
EQUITY
Total Equity	1,274.9	1,176.8
Total Liabilities and Shareholders' Equity	4,518.0	4,037.0
Reportable Legal Entities | Combined Guarantor Subsidiaries
Current Assets:
Cash and Cash Equivalents	3.6	0.0	0.0	0.0
Receivables, Net	6.2	0.0
Inventories, Net	12.4	0.0
Intercompany	45.4	21.6
Other Current Assets	0.0	6.3
Total Current Assets	67.6	27.9
Property, Plant and Equipment, Net	64.5	0.2
Investment in Consolidated Subsidiaries	14.6	15.2
Goodwill	52.9	0.0
Other Assets	70.5	0.0
Total Assets	270.1	43.3
Current Liabilities:
Short-Term Debt and Current Portion of Long-Term Debt	0.0	0.0
Accounts Payable	5.3	0.0
Intercompany	0.0	0.0
Other Accrued Liabilities	1.9	0.0
Total Current Liabilities	7.2	0.0
Long-Term Debt	0.0	0.0
Deferred Income Tax Liabilities	43.3	0.0
Other Noncurrent Liabilities	0.0	0.0
EQUITY
Total Equity	219.6	43.3
Total Liabilities and Shareholders' Equity	270.1	43.3
Reportable Legal Entities | Combined Nonguarantor Subsidiaries
Current Assets:
Cash and Cash Equivalents	35.1	54.8	35.5	79.6
Receivables, Net	257.1	206.9
Inventories, Net	177.8	148.3
Intercompany	0.0	0.0
Other Current Assets	13.1	5.4
Total Current Assets	483.1	415.4
Property, Plant and Equipment, Net	259.6	228.2
Investment in Consolidated Subsidiaries	0.0	0.0
Goodwill	125.1	125.0
Other Assets	113.6	100.4
Total Assets	981.4	869.0
Current Liabilities:
Short-Term Debt and Current Portion of Long-Term Debt	36.5	11.1
Accounts Payable	105.1	115.1
Intercompany	893.1	808.8
Other Accrued Liabilities	60.2	45.9
Total Current Liabilities	1,094.9	980.9
Long-Term Debt	85.3	77.5
Deferred Income Tax Liabilities	28.1	17.5
Other Noncurrent Liabilities	25.3	27.1
EQUITY
Total Equity	(252.2)	(234.0)
Total Liabilities and Shareholders' Equity	981.4	869.0
Consolidating Eliminations
Current Assets:
Cash and Cash Equivalents	0.0	0.0	$ 0.0	$ 0.0
Receivables, Net	0.0	0.0
Inventories, Net	0.0	0.0
Intercompany	(1,034.2)	(678.0)
Other Current Assets	0.0	0.0
Total Current Assets	(1,034.2)	(678.0)
Property, Plant and Equipment, Net	0.0	0.0
Investment in Consolidated Subsidiaries	(1,289.5)	(1,192.0)
Goodwill	0.0	0.0
Other Assets	(0.7)	0.0
Total Assets	(2,324.4)	(1,870.0)
Current Liabilities:
Short-Term Debt and Current Portion of Long-Term Debt	0.0	0.0
Accounts Payable	0.0	0.0
Intercompany	(1,081.4)	(883.9)
Other Accrued Liabilities	0.0	0.0
Total Current Liabilities	(1,081.4)	(883.9)
Long-Term Debt	0.0	0.0
Deferred Income Tax Liabilities	0.0	0.0
Other Noncurrent Liabilities	(0.7)	0.0
EQUITY
Total Equity	(1,242.3)	(986.1)
Total Liabilities and Shareholders' Equity	$ (2,324.4)	$ (1,870.0)