Guarantor Condensed Consolidated Financial Statements Condensed Consolidating Statements of Cash Flows (Unaudited) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 101.4	$ 97.6
Depreciation and Amortization	208.5	202.0
Deferred Income Taxes	61.0	60.1
Amount of Postretirement Expense Greater (Less) Than Funding	(0.8)	(11.7)
Equity in Net Earnings of Subsidiaries	0	0
Gain on the Sale of Assets	(26.6)	0
Other, Net	25.0	36.7
Changes in Operating Assets and Liabilities	(99.0)	(96.4)
Net Cash Provided by (Used in) Operating Activities	269.5	288.3
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital Spending	(153.2)	(128.4)
Proceeds Received from the Sale of Assets	64.6	17.2
Other, Net	(7.3)	(3.0)
Net Cash (Used in) Provided by Investing Activities	(95.9)	(114.2)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from Issuance or Modification of Debt	425.0	1,000.0
Retirement of Long-Term Debt	(425.0)	0
Payments on Debt	(56.0)	(1,690.9)
Borrowings under Revolving Credit Facilities	1,373.5	1,028.6
Payments on Revolving Credit Facilities	(1,418.7)	(729.2)
Redemption and Debt Issuance Costs	(29.9)	(22.3)
Repurchase of Common Stock related to Share-Based Payments	(11.2)	(10.6)
Other, Net	10.8	13.7
Net Cash Provided by (Used in) Financing Activities	(131.5)	(410.7)
Effect of Exchange Rate Changes on Cash	(1.6)	1.3
Net Increase in Cash and Cash Equivalents	40.5	(235.3)
Cash and Cash Equivalents at Beginning of Period	51.5	271.8
CASH AND CASH EQUIVALENTS AT END OF PERIOD	92.0	36.5
Parent
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	101.4	97.6
Depreciation and Amortization	0	0
Deferred Income Taxes	0	0
Amount of Postretirement Expense Greater (Less) Than Funding	0	0
Equity in Net Earnings of Subsidiaries	(101.4)	(97.6)
Gain on the Sale of Assets	0
Other, Net	0	0
Changes in Operating Assets and Liabilities	0	0
Net Cash Provided by (Used in) Operating Activities	0	0
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital Spending	0	0
Proceeds Received from the Sale of Assets	0	0
Other, Net	(0.9)	0
Net Cash (Used in) Provided by Investing Activities	(0.9)	0
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from Issuance or Modification of Debt	0	0
Retirement of Long-Term Debt	0
Payments on Debt	0	0
Borrowings under Revolving Credit Facilities	0	0
Payments on Revolving Credit Facilities	0	0
Redemption and Debt Issuance Costs	0	0
Repurchase of Common Stock related to Share-Based Payments	(11.2)	(10.6)
Other, Net	12.1	10.6
Net Cash Provided by (Used in) Financing Activities	0.9	0
Effect of Exchange Rate Changes on Cash	0	0
Net Increase in Cash and Cash Equivalents	0	0
Cash and Cash Equivalents at Beginning of Period	0	0
CASH AND CASH EQUIVALENTS AT END OF PERIOD	0	0
Subsidiary Issuer
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	101.4	97.6
Depreciation and Amortization	166.8	169.5
Deferred Income Taxes	61.0	59.6
Amount of Postretirement Expense Greater (Less) Than Funding	3.6	(10.8)
Equity in Net Earnings of Subsidiaries	(1.5)	5.6
Gain on the Sale of Assets	0
Other, Net	24.5	41.9
Changes in Operating Assets and Liabilities	(41.5)	(68.6)
Net Cash Provided by (Used in) Operating Activities	314.3	294.8
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital Spending	(130.7)	(107.8)
Proceeds Received from the Sale of Assets	0.3	17.2
Other, Net	(7.3)	(3.0)
Net Cash (Used in) Provided by Investing Activities	(137.7)	(93.6)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from Issuance or Modification of Debt	425.0	1,000.0
Retirement of Long-Term Debt	(425.0)
Payments on Debt	(45.0)	(1,690.9)
Borrowings under Revolving Credit Facilities	1,176.0	987.4
Payments on Revolving Credit Facilities	(1,238.8)	(691.4)
Redemption and Debt Issuance Costs	(29.9)	(22.3)
Repurchase of Common Stock related to Share-Based Payments	0	0
Other, Net	(0.9)	(1.3)
Net Cash Provided by (Used in) Financing Activities	(138.6)	(418.5)
Effect of Exchange Rate Changes on Cash	0	0
Net Increase in Cash and Cash Equivalents	38.0	(217.3)
Cash and Cash Equivalents at Beginning of Period	5.9	228.9
CASH AND CASH EQUIVALENTS AT END OF PERIOD	43.9	11.6
Combined Guarantor Subsidiaries
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	2.2	1.6
Depreciation and Amortization	3.1	3.1
Deferred Income Taxes	0	0
Amount of Postretirement Expense Greater (Less) Than Funding	0	0.6
Equity in Net Earnings of Subsidiaries	2.2	3.0
Gain on the Sale of Assets	0
Other, Net	0	0
Changes in Operating Assets and Liabilities	(5.9)	(8.0)
Net Cash Provided by (Used in) Operating Activities	1.6	0.3
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital Spending	(1.6)	(0.3)
Proceeds Received from the Sale of Assets	0	0
Other, Net	0	0
Net Cash (Used in) Provided by Investing Activities	(1.6)	(0.3)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from Issuance or Modification of Debt	0	0
Retirement of Long-Term Debt	0
Payments on Debt	0	0
Borrowings under Revolving Credit Facilities	0	0
Payments on Revolving Credit Facilities	0	0
Redemption and Debt Issuance Costs	0	0
Repurchase of Common Stock related to Share-Based Payments	0	0
Other, Net	0	0
Net Cash Provided by (Used in) Financing Activities	0	0
Effect of Exchange Rate Changes on Cash	0	0
Net Increase in Cash and Cash Equivalents	0	0
Cash and Cash Equivalents at Beginning of Period	0	0
CASH AND CASH EQUIVALENTS AT END OF PERIOD	0	0
Combined Nonguarantor Subsidiaries
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	(2.9)	(10.2)
Depreciation and Amortization	38.6	29.4
Deferred Income Taxes	0	0.5
Amount of Postretirement Expense Greater (Less) Than Funding	(4.4)	(1.5)
Equity in Net Earnings of Subsidiaries	0	0
Gain on the Sale of Assets	(26.6)
Other, Net	0.5	(5.2)
Changes in Operating Assets and Liabilities	(50.7)	(19.8)
Net Cash Provided by (Used in) Operating Activities	(45.5)	(6.8)
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital Spending	(20.9)	(20.3)
Proceeds Received from the Sale of Assets	64.3	0
Other, Net	0	0
Net Cash (Used in) Provided by Investing Activities	43.4	(20.3)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from Issuance or Modification of Debt	0	0
Retirement of Long-Term Debt	0
Payments on Debt	(11.0)	0
Borrowings under Revolving Credit Facilities	197.5	41.2
Payments on Revolving Credit Facilities	(179.9)	(37.8)
Redemption and Debt Issuance Costs	0	0
Repurchase of Common Stock related to Share-Based Payments	0	0
Other, Net	(0.4)	4.4
Net Cash Provided by (Used in) Financing Activities	6.2	7.8
Effect of Exchange Rate Changes on Cash	(1.6)	1.3
Net Increase in Cash and Cash Equivalents	2.5	(18.0)
Cash and Cash Equivalents at Beginning of Period	45.6	42.9
CASH AND CASH EQUIVALENTS AT END OF PERIOD	48.1	24.9
Consolidating Eliminations
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	(100.7)	(89.0)
Depreciation and Amortization	0	0
Deferred Income Taxes	0	0
Amount of Postretirement Expense Greater (Less) Than Funding	0	0
Equity in Net Earnings of Subsidiaries	100.7	89.0
Gain on the Sale of Assets	0
Other, Net	0	0
Changes in Operating Assets and Liabilities	(0.9)	0
Net Cash Provided by (Used in) Operating Activities	(0.9)	0
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital Spending	0	0
Proceeds Received from the Sale of Assets	0	0
Other, Net	0.9	0
Net Cash (Used in) Provided by Investing Activities	0.9	0
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from Issuance or Modification of Debt	0	0
Retirement of Long-Term Debt	0
Payments on Debt	0	0
Borrowings under Revolving Credit Facilities	0	0
Payments on Revolving Credit Facilities	0	0
Redemption and Debt Issuance Costs	0	0
Repurchase of Common Stock related to Share-Based Payments	0	0
Other, Net	0	0
Net Cash Provided by (Used in) Financing Activities	0	0
Effect of Exchange Rate Changes on Cash	0	0
Net Increase in Cash and Cash Equivalents	0	0
Cash and Cash Equivalents at Beginning of Period	0	0
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 0	$ 0