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Accumulated Other Comprehensive Income (Loss) (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012
Comprehensive Income (Loss) (Textual) [Abstract]
After tax loss on derivative reclassified from AOCI to earnings	$ 3
Estimated after-tax loss on derivatives to be reclassified from AOCI to earnings within the next 12 months	$ 7

- Definition

The effective portion of loss reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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