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Comprehensive Income (Loss) (Details) (Textual) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Comprehensive Income Loss (Textuals) [Abstract]
Pension and OPEB liability adjustments during the period, tax amount	$ (22.3)	$ (12.7)	$ (28.0)	$ (25.8)
Gain (loss) on cash flow hedges, Tax amount	(7.0)	26.3	(29.7)	44.3
Deferred taxes of cumulative unrealized foreign currency translation gains	(1.7)		(1.7)		(1.7)
Deferred Taxes Of Pension/Opeb Liability	467.1		467.1		495.1
Deferred taxes for accumulated gain on cash flow hedges	$ (34.3)		$ (34.3)		$ (4.6)

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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