Income Taxes	9 Months Ended
	Sep. 30, 2021
Income Taxes [Abstract]
Income Taxes	Note 15 – Income Taxes On March 16, 2020, the Company completed the Peoples Gas Acquisition. On March 31, 2020, the Company changed the method of tax accounting for certain qualifying infrastructure investments at its Peoples Natural Gas subsidiary, its largest natural gas subsidiary in Pennsylvania. This change allows a tax deduction for qualifying utility asset improvement costs that were formerly capitalized for tax purposes. The Company is performing an analysis to determine the ultimate amount of qualifying utility asset improvement costs eligible to be deducted under the IRS’s final tangible property regulations that will be reflected on its 2021 and 2020 Federal Tax Return.  As a result, the Company has estimated a portion of its infrastructure investment at Peoples Natural Gas since the acquisition date that will qualify as a utility system repairs deduction for 2021 and 2020.  Consistent with the Company’s accounting for differences between book and tax expenditures in Pennsylvania, the Company is utilizing the flow-through method to account for this timing difference. The Company completed its analysis of the income tax benefits for qualifying capital expenditures made prior to March 16, 2020 (“catch-up adjustment”) and recorded a regulatory liability of $160,655 for these tax benefits. In August 2020, the Company filed a petition with the Pennsylvania Public Utility Commission proposing treatment of the catch-up adjustment. On March 11, 2021, the Company and the statutory advocates filed a Joint Petition of Settlement (“Settlement”) representing a settlement of the parties, and, on May 6, 2021, it was approved by the Pennsylvania Public Utility Commission. The Settlement stipulates, among other points, that the catch-up adjustment be provided to utility customers over a five-year period, and the Company can continue to use flow-through accounting for the current tax repair benefit until its next base rate case. The five-year customer surcredit for the catch-up adjustment was initiated in August 2021. In addition, the Company contributed $500 to a customer-bill payment assistance program in July 2021 and in December 2021, will provide $5,000 in relief to past-due accounts for natural gas customers impacted by the COVID-19 pandemic. The Company’s effective tax rate was 3.4% and 3.2% for the three and nine months ended September 30, 2021, respectively.  The Company’s effective tax rate was 6.7% and (1.5)% for the three and nine months ended September 30, 2020, respectively.  The decrease in the effective tax rate for the third quarter is primarily attributed to an increase in our income tax benefit associated with the tax deduction for qualifying infrastructure.  The increase in the effective tax rate for the nine months ended September 30, 2021 over the first nine months of 2020 is due to an increase in income taxed at the statutory Federal and State tax rates partially offset by an increase in the income tax benefit associated with the tax deduction for qualifying infrastructure. The statutory Federal tax rate is 21% for the three and nine months ended September 30, 2021 and 2020. For states with a corporate net income tax, the state corporate net income tax rates range from 2.5% to 9.9% for all periods presented. In determining its interim tax provision, the Company reflects its estimated permanent and flow-through tax differences for the taxable year, including the basis difference for the adoption of the tangible property regulations. Qualifying utility asset improvement costs and the amortization of excess deferred income taxes caused the year-to-date effective tax rate to be significantly different from the statutory rate. In connection with the completion of the Peoples Gas Acquisition, the Company identified changes to acquired deferred tax asset valuation allowances or liabilities related to uncertain tax positions during the one year measurement period, which related to new information obtained about facts and circumstances that existed as of the acquisition date. Those changes are considered a measurement-period adjustment, and an offset was recorded as an adjustment to goodwill. The Company records all other changes to deferred tax asset valuation allowances and liabilities related to uncertain tax positions in current-period income tax expense.