Comprehensive Income (Details 2) (USD $) In Millions, unless otherwise specified	6 Months Ended
Jun. 30, 2012
Cash flow and firm commitment hedging instrument activities in other comprehensive loss, net of tax
Beginning accumulated derivative loss	$ (6.9)
Net loss reclassified to earnings	3.7
Net change in the revaluation of hedging transactions	(1.3)
Ending accumulated derivative loss	$ (4.5)

Accumulated change, net of tax, 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.

+ References+ Details

Net of tax amount of the income statement impact of the reclassification adjustment of accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges realized in net income. Also includes reclassification adjustments of an entity's share of an equity investee's deferred hedging gain (loss) realized in net income.

+ References

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

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+ Details

- Definition

Net of tax amount, before reclassification adjustments, of the change in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Also includes an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

+ References

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+ Details