Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 230.1	$ 89.0	$ 146.7
Non-cash Items Included in Net Income:
Depreciation and Amortization	280.5	270.0	277.4
Write-off of Deferred Debt Issuance Costs on Early Extinguishment of Debt	0.0	4.6	4.5
Amortization of Deferred Debt Issuance Costs	4.1	4.8	7.0
Deferred Income Taxes	110.0	33.1	62.7
Amount of Postretirement Expense Less Than Funding	(39.4)	(46.3)	(12.4)
Loss (Gain) on the Sale of Assets, Net	1.9	173.6	(26.6)
Asset Write-offs	0.7	7.0	1.5
Other, Net	20.3	31.0	19.5
Changes in Operating Assets and Liabilities, Net of Acquisitions and Dispositions	(19.0)	(40.2)	(22.3)
Net Cash Provided by Operating Activities	589.2	526.6	458.0
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital Spending	(244.1)	(201.4)	(209.2)
Proceeds from Government Grant	0.0	26.9	0.0
Acquisition of Businesses, Net of Cash Acquired	(163.2)	(173.8)	0.0
Cash Acquired Related to Business Acquisitions		16.9
Proceeds Received from the Sale of Assets, Net of Selling Costs	0.0	170.8	73.5
Other, Net	7.5	(5.7)	(8.7)
Net Cash Used in Investing Activities	(399.8)	(183.2)	(144.4)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repurchase of Common Stock	(63.0)	0.0	(200.0)
Proceeds from Issuance or Modification of Debt	0.0	250.0	425.0
Retirement of Long-Term Debt	0.0	(247.7)	(425.0)
Payments on Debt	(25.0)	(214.6)	(71.3)
Borrowings under Revolving Credit Facilities	903.0	1,957.9	1,729.2
Payments on Revolving Credit Facilities	(953.8)	(2,012.2)	(1,738.0)
Redemption and Early Tender Premiums and Debt Issuance Costs	0.0	(16.8)	(29.9)
Repurchase of Common Stock related to Share-Based Payments	(21.5)	(14.7)	(11.2)
Payment of Dividends	(49.3)	0.0	0.0
Other, Net	(1.3)	(10.7)	10.1
Net Cash Used in Financing Activities	(210.9)	(308.8)	(311.1)
EFFECT OF EXCHANGE RATE CHANGES ON CASH	(5.2)	(5.2)	(1.8)
Net (Decrease) Increase in Cash and Cash Equivalents	(26.7)	29.4	0.7
Cash and Cash Equivalents at Beginning of Period	81.6	52.2	51.5
CASH AND CASH EQUIVALENTS AT END OF PERIOD	54.9	81.6	52.2
Supplemental Cash Flow Information [Abstract]
Total Consideration Received from the Sale of Assets	0.0	181.0	83.2
Cash Proceeds Received from the Sale of Assets	0.0	170.8	73.5
Non-cash Consideration Received from the Sale of Assets	$ 0.0	$ 10.2	$ 9.7