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Merger (Details 3) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
Summary of consolidated results of operations
Revenue	$ 17,449
Earnings available to FirstEnergy	$ 979
Basic Earnings Per Share	$ 2.34
Diluted Earnings Per Share	$ 2.33

- Definition

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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- Definition

The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References+ Details