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Income Taxes (Details) - USD ($) |  | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2019 | Dec. 31, 2019 | Dec. 31, 2019 | Dec. 31, 2017 | Sep. 30, 2019 | Dec. 31, 2018
Income Taxes |  |  |  |  |  |
Reduction in net deferred income tax liabilities |  |  |  | $ 1,140,000,000 |  |
Income tax benefit | $ 57,000,000 | $ 62,000,000 |  |  |  |
Deferred Tax Liabilities, Gross | 2,897,248,000 | 2,897,248,000 | $ 2,897,248,000 |  | $ 56,000,000 | $ 2,702,353,000
Amortization period |  |  | 28 years 6 months |  |  |
Interest income to be received on the overpayment of income taxes for certain adjustments that we have filed, or will file, with the IRS (less than) | 1,000,000 | 1,000,000 | $ 1,000,000 |  |  |
General business tax credit carryforwards | 62,000,000 | 62,000,000 | 62,000,000 |  |  |
increase (decrease) in deferred income taxes due to regulation adoption |  |  | 39,000,000 |  |  |
Income tax expense benefit attributable to non controlling interests |  |  | 0 |  |  |
ARIZONA PUBLIC SERVICE COMPANY |  |  |  |  |  |
Income Taxes |  |  |  |  |  |
Deferred Tax Liabilities, Gross | 2,896,814,000 | 2,896,814,000 | 2,896,814,000 |  |  | $ 2,701,930,000
State |  |  |  |  |  |
Income Taxes |  |  |  |  |  |
Amount of state loss carryforwards | 23,000,000 | 23,000,000 | 23,000,000 |  |  |
Federal |  |  |  |  |  |
Income Taxes |  |  |  |  |  |
Amount of state loss carryforwards | $ 9,000,000 | $ 9,000,000 | $ 9,000,000 |  |  |

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- Definition The increase (decrease) during the reporting period in the account that represents the temporary difference that results from Income or Loss that is recognized for accounting purposes but not for tax purposes and vice versa, due to the adoption of regulations. + References No definition available. + Details
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- Definition Represents the amount of interest income to be received on the overpayment of income taxes for certain adjustments that the company has filed, or will file, with the IRS. + References No definition available. + Details
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