Consolidated Balance Sheets (FirstEnergy Corp.) (Parenthetical) - USD ($) $ in Millions |
Sep. 30, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Common stockholders' equity- | ||
| Common stock, par value (in dollars per share) | $ 0.1 | $ 0.1 |
| Common stock, shares authorized | 490,000,000 | 490,000,000 |
| Common stock, shares outstanding | 425,743,282 | 423,560,397 |
| Customer | ||
| Receivables- | ||
| Allowance for uncollectible accounts (in dollars) | $ 61 | $ 69 |
| Other | ||
| Receivables- | ||
| Allowance for uncollectible accounts (in dollars) | $ 3 | $ 5 |