Consolidated Statements of Equity and Comprehensive Income (Loss) (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Consolidated Statements of Equity and Comprehensive Income (Loss)
Net unrealized gain (loss) on qualifying cash flow hedges, tax	$ 0.7	$ 10.8	$ 6.7
Pension liability adjustment, tax	7.7	1.4	56.5
Foreign currency translation gains recognized upon sale of discontinued operations			5.7
Dividends declared, per share (in dollars per share)	$ 1.00	$ 1.00	$ 1.00
Exercise of stock options and other incentive plan activity, related tax benefit	1.1	3.2	1.7
Amortization of restricted stock and restricted stock unit grants recorded to discontinued operations.			$ 0.1

Tax benefit associated with any equity-based compensation plan other than an employee stock ownership plan (ESOP). The tax benefit results from the deduction by the entity on its tax return for an award of stock that exceeds the cumulative compensation cost for common stock or preferred stock recognized for financial reporting. Includes any resulting tax benefit that exceeds the previously recognized deferred tax asset (excess tax benefits).

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Tax effects of the increase (decrease) to accumulated comprehensive income during the period related to benefit plans. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.

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- Definition

Tax effect on the change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

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