Income Taxes - Deferred Income Tax Assets, Liabilities and Related Valuation Allowance (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014
Deferred Income Tax Assets:
Compensation Based Accruals				$ 26.5	$ 38.9
Net Operating Loss Carryforwards				211.5	310.4
Postretirement Benefits				103.2	127.3
Tax Credits				32.6	28.8
Other				63.4	50.5
Valuation allowance	$ (53.6)	$ (52.1)	$ (37.3)	(44.8)	(53.6)
Total Deferred Income Tax Assets				392.4	502.3
Deferred Income Tax Liabilities:
Property, Plant and Equipment				(286.1)	(264.7)
Goodwill				(279.0)	(271.3)
Other Intangibles				(86.8)	(85.1)
Other				(3.6)	(5.9)
Total deferred income tax liabilities				(655.5)	(627.0)
Net Deferred Income Tax (Liability) Asset (a)				(263.1)	(124.7)
Total deferred income tax assets				437.2	555.9
Other Assets				48.4	38.1
Decrease in Deferred Income Tax Liabilities due to reclassification				(266.7)	(132.2)
Summary of Valuation Allowances
Balance Beginning of Period	53.6	52.1	37.3
Balance at End of Period	44.8	53.6	52.1
International
Deferred Income Tax Assets:
Valuation allowance	(29.2)	(29.2)			(29.2)
Summary of Valuation Allowances
Balance Beginning of Period	29.2
Balance at End of Period		29.2
Capital loss carryforward | United States
Deferred Income Tax Assets:
Valuation allowance	(5.9)	(5.9)			(5.9)
Summary of Valuation Allowances
Balance Beginning of Period	5.9
Balance at End of Period		5.9
Research Credit carryforward | State and Local Jurisdiction
Deferred Income Tax Assets:
Valuation allowance	(5.4)			$ (5.4)
Summary of Valuation Allowances
Balance at End of Period	5.4
Net operating losses | State and Local Jurisdiction
Deferred Income Tax Assets:
Valuation allowance	(4.3)	(4.3)			(4.3)
Summary of Valuation Allowances
Balance Beginning of Period	4.3
Balance at End of Period		4.3
Deferred Tax Assets
Summary of Valuation Allowances
Charges	0.0	5.1	15.2
Deductions	$ (8.8)	$ (3.6)	$ (0.4)
New Accounting Pronouncement, Early Adoption, Effect
Valuation Allowance [Line Items]
Deferred Tax Assets, Net, Current					(0.1)
Net deferred tax liability, current					(177.1)
Deferred Income Tax Liabilities:
Decrease in Deferred Income Tax Liabilities due to reclassification					$ (177.1)