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Accumulated Other Comprehensive Income (Details 1) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Reclassification Out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Other operating expenses | $ (953) | $ (842) | $ (2,835) | $ (2,799)
Interest expense | (286) | (285) | (863) | (846)
INCOME (LOSS) BEFORE INCOME TAXES | 631 | 621 | (47) | 1,289
Income taxes | (251) | (226) | (334) | (485)
FES |  |  |  |
Reclassification Out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Other operating expenses | (316) | (246) | (925) | (996)
INCOME (LOSS) BEFORE INCOME TAXES | 96 | 190 | (272) | 160
Income taxes | (56) | (70) | 5 | (64)
Reclassifications from AOCI | Gains & losses on cash flow hedges |  |  |  |
Reclassification Out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
INCOME (LOSS) BEFORE INCOME TAXES | 2 | 2 | 6 | 4
Income taxes | 0 | (1) | (2) | (2)
Net of tax | 2 | 1 | 4 | 2
Reclassifications from AOCI | Gains & losses on cash flow hedges | FES |  |  |  |
Reclassification Out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Income taxes | 0 | 0 | 0 | 0
Net of tax | 1 | 0 | 0 | (2)
Reclassifications from AOCI | Gains & losses on cash flow hedges | Commodity contracts |  |  |  |
Reclassification Out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Other operating expenses | 0 | 0 | 0 | (2)
Reclassifications from AOCI | Gains & losses on cash flow hedges | Commodity contracts | FES |  |  |  |
Reclassification Out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Other operating expenses | 1 | 0 | 0 | (2)
Reclassifications from AOCI | Gains & losses on cash flow hedges | Long-term debt |  |  |  |
Reclassification Out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Interest expense | 2 | 2 | 6 | 6
Reclassifications from AOCI | Unrealized gains on AFS securities |  |  |  |
Reclassification Out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Investment income (loss) | (17) | (3) | (42) | (20)
Income taxes | 7 | 1 | 16 | 7
Net of tax | (10) | (2) | (26) | (13)
Reclassifications from AOCI | Unrealized gains on AFS securities | FES |  |  |  |
Reclassification Out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Investment income (loss) | (17) | (3) | (41) | (18)
Income taxes | 6 | 1 | 15 | 7
Net of tax | (11) | (2) | (26) | (11)
Reclassifications from AOCI | Defined benefit pension and OPEB plans |  |  |  |
Reclassification Out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Prior-service costs | (18) | (31) | (54) | (94)
Income taxes | 7 | 12 | 21 | 36
Net of tax | (11) | (19) | (33) | (58)
Reclassifications from AOCI | Defined benefit pension and OPEB plans | FES |  |  |  |
Reclassification Out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Prior-service costs | (3) | (4) | (10) | (12)
Income taxes | 1 | 1 | 4 | 4
Net of tax | $ (2) | $ (3) | $ (6) | $ (8)

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