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Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Currently payable (receivable)- |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | $ (1) | $ 1 | $ (132)
State |  |  |  |  |  |  |  |  | 9 | 30 | (72)
Currently payable (receivable) Total |  |  |  |  |  |  |  |  | 8 | 31 | (204)
Deferred, net- |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | (3,114) | 277 | 214
State |  |  |  |  |  |  |  |  | 59 | 15 | (42)
Deferred Tax Total |  |  |  |  |  |  |  |  | (3,055) | 292 | 172
Investment tax credit amortization |  |  |  |  |  |  |  |  | (8) | (8) | (10)
Total provision for income taxes (benefits) | $ (3,389) | $ 251 | $ (130) | $ 213 | $ (170) | $ 226 | $ 115 | $ 144 | (3,055) | 315 | (42)
Internal Revenue Service (IRS) |  |  |  |  |  |  |  |  |  |  |
Deferred, net- |  |  |  |  |  |  |  |  |  |  |
Current tax effect of discontinued operation |  |  |  |  |  |  |  |  |  |  | 106
Deferred tax effect of discontinued operation |  |  |  |  |  |  |  |  |  |  | 44
State and Local |  |  |  |  |  |  |  |  |  |  |
Deferred, net- |  |  |  |  |  |  |  |  |  |  |
Current tax effect of discontinued operation |  |  |  |  |  |  |  |  |  |  | 12
Deferred tax effect of discontinued operation |  |  |  |  |  |  |  |  |  |  | 5
FES |  |  |  |  |  |  |  |  |  |  |
Currently payable (receivable)- |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | (67) | (56) | (222)
State |  |  |  |  |  |  |  |  | (1) | 2 | (13)
Currently payable (receivable) Total |  |  |  |  |  |  |  |  | (68) | (54) | (235)
Deferred, net- |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | (2,861) | 103 | 25
State |  |  |  |  |  |  |  |  | (57) | 18 | (14)
Deferred Tax Total |  |  |  |  |  |  |  |  | (2,918) | 121 | 11
Investment tax credit amortization |  |  |  |  |  |  |  |  | (2) | (2) | (4)
Total provision for income taxes (benefits) | $ (2,983) | $ 56 | $ (143) | $ 82 | $ 1 | $ 70 | $ (4) | $ (2) | $ (2,988) | $ 65 | $ (228)

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