CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Other comprehensive income (loss). net of tax:
Change in fair value of derivatives utilized for hedging purposes, tax expense (benefit)	$ 0.8	$ (4.1)	$ (30.9)
Reclassification of change in fair value of derivatives to net income, tax expense	14.7	10.0	6.5
Change in foreign currency translation adjustments, tax (benefit) expense	(2.6)	5.5	17.0
Adjustments to pension and other postretirement benefit plan liabilities, tax benefit	$ (1.9)	$ (0.1)	$ (0.2)

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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Tax effect of the adjustment that results from the process of translating subsidiary financial statements and foreign equity investments into functional currency of the reporting entity. 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 reclassification adjustment for accumulated gains and losses from derivative instrument designated and qualifying as the effective portion of cash flow hedges included in accumulated comprehensive income that was realized in net income during the period.

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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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