XML 36 R26.htm IDEA: XBRL DOCUMENT
v3.23.3

Income Taxes (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2023
Income Tax Disclosure [Abstract] |
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] | Reconciliation between the statutory rate and ETR:
|  | Three Months Ended Sept. 30 |  | Nine Months Ended Sept. 30
|  | 2023 |  | 2022 |  | 2023 |  | 2022
Federal statutory rate |  | 21.0 | % |  | 21.0 | % |  | 21.0 | % |  | 21.0 | %
State tax (net of federal tax effect) |  | 5.0 |  |  | 4.9 |  |  | 4.9 |  |  | 4.9 |
(Decreases) increases: |  |  |  |  |  |  |  |
Wind PTCs (a) |  | (13.8) |  |  | (12.3) |  |  | (27.3) |  |  | (25.2) |
Plant regulatory differences (b) |  | (5.3) |  |  | (5.8) |  |  | (5.5) |  |  | (5.5) |
Other tax credits, net operating loss & tax credits allowances |  | (1.1) |  |  | (1.2) |  |  | (1.2) |  |  | (1.4) |
Other (net) |  | (0.1) |  |  | (0.3) |  |  | 0.1 |  |  | (0.1) |
Effective income tax rate |  | 5.7 | % |  | 6.3 | % |  | (8.0) | % |  | (6.3) | %
(a)Wind PTCs are credited to customers (reduction to revenue) and do not materially impact net income. (b)Plant regulatory differences primarily relate to the credit of excess deferred taxes to customers through the average rate assumption method. Income tax benefits associated with the credit are offset by corresponding revenue reductions.

X
- References No definition available. + Details
Name: | us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Paragraph 12 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-12 + Details
Name: | us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration