Guarantor Condensed Consolidating Financial Statements - Balance Sheets (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Current Assets:
Cash and Cash Equivalents	$ 37.4	$ 59.1	$ 75.6	$ 54.9
Receivables, Net	453.0	426.8
Inventories, Net	603.1	582.9
Intercompany	0.0	0.0
Other Current Assets	51.8	46.1
Total Current Assets	1,145.3	1,114.9
Property, Plant and Equipment, Net	1,785.4	1,751.9
Investment in Consolidated Subsidiaries	0.0	0.0
Goodwill	1,265.8	1,260.3
Other Assets	465.3	476.3
Total Assets	4,661.8	4,603.4
Current Liabilities:
Short-Term Debt and Current Portion of Long-Term Debt	69.0	63.4
Accounts Payable	447.0	466.5
Intercompany	0.0	0.0
Interest Payable	18.4	15.4
Other Accrued Liabilities	223.0	234.5
Total Current Liabilities	757.4	779.8
Long-Term Debt	2,183.8	2,088.5
Deferred Income Tax Liabilities	381.4	408.0
Other Noncurrent Liabilities	258.4	270.6
EQUITY
Total Equity	1,080.8	1,056.5
Total Liabilities and Shareholders' Equity	4,661.8	4,603.4
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	1,417.6	1,362.9
Goodwill	0.0	0.0
Other Assets	0.0	0.0
Total Assets	1,417.6	1,362.9
Current Liabilities:
Short-Term Debt and Current Portion of Long-Term Debt	0.0	0.0
Accounts Payable	0.0	0.0
Intercompany	336.8	306.4
Interest Payable	0.0	0.0
Other Accrued Liabilities	0.0	0.0
Total Current Liabilities	336.8	306.4
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	1,080.8	1,056.5
Total Liabilities and Shareholders' Equity	1,417.6	1,362.9
Reportable Legal Entities | Subsidiary Issuer
Current Assets:
Cash and Cash Equivalents	6.1	0.9	28.8	0.1
Receivables, Net	197.0	183.7
Inventories, Net	411.5	403.8
Intercompany	1,102.4	1,077.5
Other Current Assets	40.4	36.4
Total Current Assets	1,757.4	1,702.3
Property, Plant and Equipment, Net	1,443.4	1,435.8
Investment in Consolidated Subsidiaries	0.0	0.0
Goodwill	1,098.9	1,098.9
Other Assets	306.7	314.8
Total Assets	4,606.4	4,551.8
Current Liabilities:
Short-Term Debt and Current Portion of Long-Term Debt	32.3	26.0
Accounts Payable	327.6	354.3
Intercompany	0.0	0.0
Interest Payable	18.3	15.4
Other Accrued Liabilities	161.7	163.2
Total Current Liabilities	539.9	558.9
Long-Term Debt	2,130.4	2,042.4
Deferred Income Tax Liabilities	314.2	342.1
Other Noncurrent Liabilities	204.3	245.5
EQUITY
Total Equity	1,417.6	1,362.9
Total Liabilities and Shareholders' Equity	4,606.4	4,551.8
Reportable Legal Entities | Combined Guarantor Subsidiaries
Current Assets:
Cash and Cash Equivalents	0.9	1.2	7.7	0.0
Receivables, Net	10.4	10.1
Inventories, Net	18.6	16.1
Intercompany	87.3	73.3
Other Current Assets	0.0	0.0
Total Current Assets	117.2	100.7
Property, Plant and Equipment, Net	68.8	64.1
Investment in Consolidated Subsidiaries	15.1	12.3
Goodwill	55.5	55.5
Other Assets	63.2	65.6
Total Assets	319.8	298.2
Current Liabilities:
Short-Term Debt and Current Portion of Long-Term Debt	0.0	0.0
Accounts Payable	10.1	8.5
Intercompany	0.0	0.0
Interest Payable	0.0	0.0
Other Accrued Liabilities	1.8	3.0
Total Current Liabilities	11.9	11.5
Long-Term Debt	0.0	0.0
Deferred Income Tax Liabilities	43.3	43.3
Other Noncurrent Liabilities	0.0	0.0
EQUITY
Total Equity	264.6	243.4
Total Liabilities and Shareholders' Equity	319.8	298.2
Reportable Legal Entities | Combined Nonguarantor Subsidiaries
Current Assets:
Cash and Cash Equivalents	30.4	57.0	39.1	54.8
Receivables, Net	245.6	233.0
Inventories, Net	173.0	163.0
Intercompany	0.0	0.0
Other Current Assets	11.4	9.7
Total Current Assets	460.4	462.7
Property, Plant and Equipment, Net	273.2	252.0
Investment in Consolidated Subsidiaries	0.0	0.0
Goodwill	111.4	105.9
Other Assets	95.4	95.9
Total Assets	940.4	916.5
Current Liabilities:
Short-Term Debt and Current Portion of Long-Term Debt	36.7	37.4
Accounts Payable	109.3	103.7
Intercompany	882.3	913.0
Interest Payable	0.1	0.0
Other Accrued Liabilities	59.5	68.3
Total Current Liabilities	1,087.9	1,122.4
Long-Term Debt	53.4	46.1
Deferred Income Tax Liabilities	23.9	22.6
Other Noncurrent Liabilities	54.1	25.1
EQUITY
Total Equity	(278.9)	(299.7)
Total Liabilities and Shareholders' Equity	940.4	916.5
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	(1,189.7)	(1,150.8)
Other Current Assets	0.0	0.0
Total Current Assets	(1,189.7)	(1,150.8)
Property, Plant and Equipment, Net	0.0	0.0
Investment in Consolidated Subsidiaries	(1,432.7)	(1,375.2)
Goodwill	0.0	0.0
Other Assets	0.0	0.0
Total Assets	(2,622.4)	(2,526.0)
Current Liabilities:
Short-Term Debt and Current Portion of Long-Term Debt	0.0	0.0
Accounts Payable	0.0	0.0
Intercompany	(1,219.1)	(1,219.4)
Interest Payable	0.0	0.0
Other Accrued Liabilities	0.0	0.0
Total Current Liabilities	(1,219.1)	(1,219.4)
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	(1,403.3)	(1,306.6)
Total Liabilities and Shareholders' Equity	$ (2,622.4)	$ (2,526.0)