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INCOME TAXES | 9 Months Ended
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Sep. 30, 2018
Income Tax Disclosure [Abstract] |
INCOME TAXES | INCOME TAXES The provision for income taxes differs from the amount of income tax determined by applying the applicable United States statutory federal income tax rate to income before income taxes as a result of the following:
|  | Three Months Ended September 30, 2018 |  | Nine Months Ended September 30, 2018
|  | Amount (in millions) |  | Effective Tax Rate |  | Amount (in millions) |  | Effective Tax Rate
Statutory federal income tax |  | $ | 52.6 |  |  | 21.0 | % |  | $ | 212.3 |  |  | 21.0 | %
State income taxes net of federal tax benefit |  | 16.0 |  |  | 6.4 | % |  | 63.6 |  |  | 6.3 | %
Tax repairs |  | (35.8 | ) |  | (14.3 | )% |  | (83.9 | ) |  | (8.3 | )%
Federal tax reform |  | (3.2 | ) |  | (1.3 | )% |  | (17.2 | ) |  | (1.7 | )%
Other |  | (12.6 | ) |  | (5.0 | )% |  | (18.4 | ) |  | (1.8 | )%
Total income tax expense |  | $ | 17.0 |  |  | 6.8 | % |  | $ | 156.4 |  |  | 15.5 | %
The effective tax rates of 6.8% and 15.5% for the three and nine months ended September 30, 2018, respectively, differ from the United States statutory federal income tax rate of 21%, primarily due to the flow through of tax repairs in connection with the Wisconsin rate settlement and the impact of the Tax Legislation, partially offset by state income taxes. The Tax Legislation, signed into law in December 2017, required our regulated utilities to remeasure their deferred income taxes and we began to amortize the resulting excess deferred income taxes beginning in 2018 in accordance with normalization requirements (see federal tax reform line above). See Note 22, Regulatory Environment, for more information about the impact of the Tax Legislation and the Wisconsin rate settlement. On December 22, 2017, the SEC staff issued guidance in Staff Accounting Bulletin 118 (SAB 118), Income Tax Accounting Implications of the Tax Legislation, which provides for a measurement period of up to one year from the enactment date to complete accounting under GAAP for the tax effects of the legislation. Due to the complex and comprehensive nature of the enacted tax law changes, and their application under GAAP, certain amounts related to bonus depreciation and future tax benefit utilization recorded in the financial statements as a result of the Tax Legislation are to be considered "provisional" as discussed in SAB 118 and subject to revision. We are awaiting additional guidance from industry and income tax authorities in order to finalize our accounting.

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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -URI http://asc.fasb.org/topic&trid=2144680 + Details
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