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Stockholders' Equity (Changes in Stockholders Equity) (Details) (USD $) In Millions	3 Months Ended		9 Months Ended					9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011 Common Stock Par Value $.10 per Share [Member]	Sep. 30, 2010 Common Stock Par Value $.10 per Share [Member]	Dec. 31, 2009 Common Stock Par Value $.10 per Share [Member]	Sep. 30, 2011 Excess of Capital over Par Value [Member]	Sep. 30, 2010 Excess of Capital over Par Value [Member]	Sep. 30, 2011 Retained Earnings [Member]	Sep. 30, 2010 Retained Earnings [Member]	Sep. 30, 2011 Treasury Stock [Member]	Sep. 30, 2010 Treasury Stock [Member]	Sep. 30, 2011 Accumulated Other Comprehensive Income [Member]	Sep. 30, 2010 Accumulated Other Comprehensive Income [Member]
Beginning Balance			$ 1,313.8	$ 1,275.6	$ 12.3	$ 12.3	$ 12.3	$ 1,172.8	$ 1,179.6	$ 329.9	$ 322.4	$ (57.1)	$ (71.3)	$ (144.1)	$ (167.4)
Amortization of actuarial losses and prior service costs (credits), net of income tax			6.4	6.0										6.4	6.0
Net (loss)	(6.9)	1.0	(44.7)	(1.5)						(44.7)	(1.5)
Comprehensive (loss)			(38.3)	4.5
Common stock issued in exchange for convertible senior notes			41.2		0.7			40.5
Restricted and other stock issued, net			5.4	5.5				(1.1)	(8.3)			6.5	13.8
Ending Balance	$ 1,322.1	$ 1,285.6	$ 1,322.1	$ 1,285.6	$ 13.0	$ 12.3	$ 12.3	$ 1,212.2	$ 1,171.3	$ 285.2	$ 320.9	$ (50.6)	$ (57.5)	$ (137.7)	$ (161.4)

X

- Definition

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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The net amount of stock issued during the period upon the conversion of convertible securities, net of adjustments (for example, to additional paid in capital) including the write-off of an equity component recognized to record the convertible debt instrument as two separate components - a debt component and an equity component. This item is meant to disclose the value of shares issued on conversion of convertible securities that were recorded as two separate (debt and equity) components.

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Value of stock (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of stock value of such awards forfeited. Stock issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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