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Consolidated Balance Sheets (FirstEnergy Solutions Corp.) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Common stockholders’ equity-
Common stock, shares authorized	490,000,000	490,000,000
Common stock, shares outstanding	443,740,014	442,344,218
FES
Receivables-
Allowance for uncollectible accounts (in dollars)	$ 4	$ 5
Common stockholders’ equity-
Common stock, shares authorized	750	750
Common stock, shares outstanding	7	7

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- Definition

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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