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Financial Information for Subsidiary and Guarantor Parent (Cash Flow) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Statement of Cash Flows
Increase (decrease) in cash and cash equivalents	$ (230.5)	$ (170.3)
Financing Activities:
OtherFinancingActivities	(26.9)	(27.1)
NetReceiptsPaymentsOnIntercompanyActivity	0	0
Dividends paid to shareholders	(38.4)	(38.2)
Cash provided by (used in) financing activities 1	(65.3)	(65.3)
Investing Activities:
Purchases of property, plant and equipment	(223.7)	(165.7)
Asset disposals and other	0.5	0.9
Cash provided by (used in) investing activities	(223.2)	(164.8)
Net cash flows provided by (used in) operating activities from continuing operations	58.0	59.8
[ParentCompanyMember]
Statement of Cash Flows
Increase (decrease) in cash and cash equivalents	(2.6)	3.7
Financing Activities:
OtherFinancingActivities	(21.7)	(21.6)
NetReceiptsPaymentsOnIntercompanyActivity	78.7	90.2
Dividends paid to shareholders	(38.4)	(38.2)
Cash provided by (used in) financing activities 1	18.6	30.4
Investing Activities:
Purchases of property, plant and equipment	(0.1)	(0.8)
Asset disposals and other	0	0
Cash provided by (used in) investing activities	(0.1)	(0.8)
Net cash flows provided by (used in) operating activities from continuing operations	(21.1)	(25.9)
[SubsidiariesMember]
Statement of Cash Flows
Increase (decrease) in cash and cash equivalents	(8.4)	(119.4)
Financing Activities:
OtherFinancingActivities	(0.1)	(0.1)
NetReceiptsPaymentsOnIntercompanyActivity	141.7	5.8
Dividends paid to shareholders	0	0
Cash provided by (used in) financing activities 1	141.6	5.7
Investing Activities:
Purchases of property, plant and equipment	(201.7)	(127.9)
Asset disposals and other	0.1	0.2
Cash provided by (used in) investing activities	(201.6)	(127.7)
Net cash flows provided by (used in) operating activities from continuing operations	51.6	2.6
[NonGuarantorSubsidiariesMember]
Statement of Cash Flows
Increase (decrease) in cash and cash equivalents	(219.5)	(54.6)
Financing Activities:
OtherFinancingActivities	(5.1)	(5.4)
NetReceiptsPaymentsOnIntercompanyActivity	(220.4)	(96.0)
Dividends paid to shareholders	0	0
Cash provided by (used in) financing activities 1	(225.5)	(101.4)
Investing Activities:
Purchases of property, plant and equipment	(21.9)	(37.0)
Asset disposals and other	0.4	0.7
Cash provided by (used in) investing activities	(21.5)	(36.3)
Net cash flows provided by (used in) operating activities from continuing operations	27.5	83.1
[ConsolidationEliminationsMember]
Statement of Cash Flows
Increase (decrease) in cash and cash equivalents	0	0
Financing Activities:
OtherFinancingActivities	0	0
NetReceiptsPaymentsOnIntercompanyActivity	0	0
Dividends paid to shareholders	0	0
Cash provided by (used in) financing activities 1	0	0
Investing Activities:
Purchases of property, plant and equipment	0	0
Asset disposals and other	0	0
Cash provided by (used in) investing activities	0	0
Net cash flows provided by (used in) operating activities from continuing operations	$ 0	$ 0

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