Utility Rate Regulation - Regulatory Matters (Details) - USD ($)
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1 Months Ended |
3 Months Ended |
6 Months Ended |
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Apr. 30, 2026 |
Mar. 05, 2026 |
Feb. 16, 2026 |
Nov. 26, 2025 |
Sep. 30, 2025 |
Mar. 31, 2026 |
Jun. 30, 2026 |
Mar. 31, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2027 |
Mar. 31, 2027 |
Dec. 31, 2025 |
Nov. 24, 2025 |
Jun. 13, 2025 |
| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Regulatory assets |
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$ 2,148,000,000
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$ 2,148,000,000
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$ 2,092,000,000
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| Storm Costs [Member] |
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Regulatory assets |
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109,000,000
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109,000,000
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113,000,000
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| Kentucky Public Service Commission [Member] | Electric and Gas Rates |
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Public Utilities, Approved Rate Increase (Decrease), Amount |
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$ 233,000,000
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| Public Utilities, Approved Rate Increase (Decrease), Amount |
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$ 233,000,000
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| PPL Electric [Member] |
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Annual Storm Damage Expense Rider Maximum Prior To Rate Case |
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20,000,000
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| Annual Storm Damage Expense Rider Maximum Approved in Rate Case |
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32,000,000
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| PPL Electric [Member] | Unaffiliated Third Party Entity [Member] |
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Accounts Receivable, Purchase |
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379,000,000
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$ 345,000,000
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932,000,000
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$ 811,000,000
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| PPL Electric [Member] | Pennsylvania Public Utility Commission |
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| Regulatory Matters [Line Items] |
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| Proposed Total Amount of Low-Income Usage Reduction Program Annual Budget |
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$ 13,500,000
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| Proposed Amount of Increase to Low-Income Usage Reduction Program Annual Budget |
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1,500,000
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| Amount of Support for Residential Low-Income Program to be Provided by New Tariff Schedule |
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$ 11,000,000
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Requested Distribution System Improvement Charge Cap |
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5.00%
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| Public Utilities, Requested Return on Equity, Percentage |
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11.30%
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| Distribution System Improvement Reset Percent |
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0.00%
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| Requested Storm Damage Expense Rider Expense |
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$ 32,000,000
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| Public Utilities, Requested Return on Equity, Percentage |
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11.30%
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| Requested Storm Damage Expense Rider Expense |
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$ 32,000,000
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| Distribution System Improvement Reset Percent |
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0.00%
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| PPL Electric [Member] | Pennsylvania Public Utility Commission | Forecast [Member] |
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Total Projected Cost of Information Technology Upgrades |
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$ 54,000,000
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| Total Projected Cost of Information Technology Upgrades |
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54,000,000
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| PPL Electric [Member] | Pennsylvania Public Utility Commission | Electric Rates |
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Public Utilities, Requested Rate Increase (Decrease), Amount |
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$ 275,000,000
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$ 356,000,000
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| Public Utilities, Requested Rate Increase (Decrease), Percentage |
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8.60%
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| Public Utilities, Requested Rate Increase (Decrease), Amount Already Included In Customer Bills |
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$ 50,000,000
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| Public Utilities, Requested Rate Increase (Decrease), Amount |
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275,000,000
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$ 356,000,000
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| Public Utilities, Requested Rate Increase (Decrease), Percentage |
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8.60%
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| LGE [Member] | Mill Creek Unit 2 |
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Public Utilities, Property, Plant and Equipment, Generation or Processing |
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188,000,000
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188,000,000
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| LGE [Member] | Kentucky Public Service Commission [Member] |
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| Regulatory Matters [Line Items] |
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| Public Utilities, Approved Return on Equity for Capital Rate Adjustment Mechanism, Percentage |
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9.675%
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Public Utilities, Approved Return on Equity, Percentage |
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9.775%
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| LGE [Member] | Kentucky Public Service Commission [Member] | Electric Rates |
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Public Utilities, Approved Rate Increase (Decrease), Amount |
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$ 59,000,000
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| Public Utilities, Approved Rate Increase (Decrease), Amount |
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59,000,000
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| LGE [Member] | Kentucky Public Service Commission [Member] | Gas Rates |
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Public Utilities, Approved Rate Increase (Decrease), Amount |
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46,000,000
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| Public Utilities, Approved Rate Increase (Decrease), Amount |
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$ 46,000,000
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| KU [Member] | Kentucky Public Service Commission [Member] |
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| Regulatory Matters [Line Items] |
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| Public Utilities, Approved Return on Equity for Capital Rate Adjustment Mechanism, Percentage |
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9.675%
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Public Utilities, Approved Return on Equity, Percentage |
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9.775%
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| KU [Member] | Kentucky Public Service Commission [Member] | Electric Rates |
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Public Utilities, Approved Rate Increase (Decrease), Amount |
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$ 128,000,000
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| Public Utilities, Approved Rate Increase (Decrease), Amount |
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$ 128,000,000
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| KU [Member] | Virginia State Corporation Commission | Electric Rates |
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Public Utilities, Requested Rate Increase (Decrease), Amount |
$ 19,000,000
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| Public Utilities, Requested Return on Equity, Percentage |
10.95%
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| Public Utilities, Requested Rate Increase (Decrease), Amount |
$ 19,000,000
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| Public Utilities, Requested Return on Equity, Percentage |
10.95%
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| Rhode Island Energy |
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| Regulatory Matters [Line Items] |
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| Estimated Amount of Refund Related to the FERC-Mandated Reduction in ROE |
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$ 26,000,000
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Net Present Value of Hold Harmless Obligation |
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$ 155,000,000
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| Residential Electric Winter Bill Credit Approved by the RIPUC |
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$ 23.54
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| Amount of Transfer from the Storm Fund Balance Directed by the RIPUC |
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11,000,000
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| Net Present Value of Hold Harmless Obligation |
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$ 155,000,000
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| Residential Electric Winter Bill Credit Approved by the RIPUC |
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$ 23.54
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| Rhode Island Energy | Forecast [Member] |
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Storm Fund Balance Expected |
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$ 0
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| Rhode Island Energy | Unaffiliated Third Party Entity [Member] |
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Accounts Receivable, Purchase |
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74,000,000
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68,000,000
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170,000,000
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155,000,000
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| Rhode Island Energy | Rhode Island Public Utility Commission |
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Public Utilities, Requested Return on Equity, Percentage |
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10.75%
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| Public Utilities, Requested Return on Equity, Percentage |
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10.75%
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| Rhode Island Energy | Rhode Island Public Utility Commission | Capital Investment |
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Total Approved Spend on FY 2027 Gas ISR Plan |
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$ 161,000,000
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| Total Approved Spend on FY 2027 Gas ISR Plan |
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161,000,000
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| Rhode Island Energy | Rhode Island Public Utility Commission | Paving Costs |
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Total Approved Spend on FY 2027 Gas ISR Plan |
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17,000,000
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| Total Approved Spend on FY 2027 Gas ISR Plan |
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17,000,000
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| Rhode Island Energy | Rhode Island Public Utility Commission | AMF Capital Investment |
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Approved Capital Investment Spend on FY 2027 Electric ISR Plan |
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18,000,000
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| Rhode Island Energy | Rhode Island Public Utility Commission | Vegetation management |
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Total Approved Spend on FY 2027 Electric ISR Plan |
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14,000,000
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| Rhode Island Energy | Rhode Island Public Utility Commission | Capital Investment |
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Approved Capital Investment Spend on FY 2027 Electric ISR Plan |
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$ 141,000,000
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| Rhode Island Energy | Rhode Island Public Utility Commission | Electric and Gas Rates | Year 1 |
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Public Utilities, Requested Rate Increase (Decrease), Amount |
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$ 181,000,000
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| Public Utilities, Requested Rate Increase (Decrease), Amount |
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181,000,000
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| Rhode Island Energy | Rhode Island Public Utility Commission | Electric and Gas Rates | Year 2 |
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Public Utilities, Requested Rate Increase (Decrease), Amount |
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49,000,000
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| Public Utilities, Requested Rate Increase (Decrease), Amount |
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49,000,000
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| Rhode Island Energy | Rhode Island Public Utility Commission | Electric Rates | Year 1 |
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Public Utilities, Requested Rate Increase (Decrease), Amount |
|
|
|
$ 66,000,000
|
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|
| Public Utilities, Requested Rate Increase (Decrease), Percentage |
|
|
|
18.20%
|
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| Public Utilities, Requested Rate Increase (Decrease), Amount |
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|
|
$ 66,000,000
|
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|
|
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|
|
| Public Utilities, Requested Rate Increase (Decrease), Percentage |
|
|
|
18.20%
|
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| Rhode Island Energy | Rhode Island Public Utility Commission | Electric Rates | Year 2 |
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Public Utilities, Requested Rate Increase (Decrease), Amount |
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|
|
$ 17,000,000
|
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| Public Utilities, Requested Rate Increase (Decrease), Percentage |
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|
3.60%
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| Public Utilities, Requested Rate Increase (Decrease), Amount |
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|
$ 17,000,000
|
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|
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|
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|
| Public Utilities, Requested Rate Increase (Decrease), Percentage |
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|
|
3.60%
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| Rhode Island Energy | Rhode Island Public Utility Commission | Gas Rates | Year 1 |
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Public Utilities, Requested Rate Increase (Decrease), Amount |
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|
$ 115,000,000
|
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| Public Utilities, Requested Rate Increase (Decrease), Percentage |
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|
|
36.40%
|
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|
|
|
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|
| Public Utilities, Requested Rate Increase (Decrease), Amount |
|
|
|
$ 115,000,000
|
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| Public Utilities, Requested Rate Increase (Decrease), Percentage |
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|
36.40%
|
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| Rhode Island Energy | Rhode Island Public Utility Commission | Gas Rates | Year 2 |
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
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| Public Utilities, Requested Rate Increase (Decrease), Amount |
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|
|
$ 32,000,000
|
|
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|
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|
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| Public Utilities, Requested Rate Increase (Decrease), Percentage |
|
|
|
7.40%
|
|
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|
|
|
|
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|
|
| Public Utilities, Requested Rate Increase (Decrease), Amount |
|
|
|
$ 32,000,000
|
|
|
|
|
|
|
|
|
|
|
|
|
| Public Utilities, Requested Rate Increase (Decrease), Percentage |
|
|
|
7.40%
|
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|
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| PPL Electric Utilities Corp [Member] |
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
|
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|
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|
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|
|
|
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| Regulatory assets |
|
|
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771,000,000
|
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|
771,000,000
|
|
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|
725,000,000
|
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| Annual Storm Damage Expense Rider Maximum Prior To Rate Case |
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20,000,000
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| Annual Storm Damage Expense Rider Maximum Approved in Rate Case |
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|
32,000,000
|
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| PPL Electric Utilities Corp [Member] | Storm Costs [Member] |
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
|
|
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|
|
|
|
|
|
|
|
|
|
|
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|
| Regulatory assets |
|
|
|
|
|
|
37,000,000
|
|
|
37,000,000
|
|
|
|
42,000,000
|
|
|
| PPL Electric Utilities Corp [Member] | Unaffiliated Third Party Entity [Member] |
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| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
|
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|
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|
|
|
|
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|
| Accounts Receivable, Purchase |
|
|
|
|
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|
379,000,000
|
|
$ 345,000,000
|
932,000,000
|
$ 811,000,000
|
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| PPL Electric Utilities Corp [Member] | Pennsylvania Public Utility Commission |
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| Regulatory Matters [Line Items] |
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|
| Proposed Total Amount of Low-Income Usage Reduction Program Annual Budget |
|
13,500,000
|
|
|
|
|
|
|
|
|
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|
|
|
|
| Proposed Amount of Increase to Low-Income Usage Reduction Program Annual Budget |
|
1,500,000
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
| Amount of Support for Residential Low-Income Program to be Provided by New Tariff Schedule |
|
$ 11,000,000
|
|
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|
| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
|
|
|
|
|
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|
|
|
|
|
|
| Requested Distribution System Improvement Charge Cap |
|
5.00%
|
|
|
|
|
|
|
|
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|
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|
| Public Utilities, Requested Return on Equity, Percentage |
|
|
|
|
11.30%
|
|
|
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|
|
|
|
|
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|
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| Distribution System Improvement Reset Percent |
|
0.00%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Requested Storm Damage Expense Rider Expense |
|
$ 32,000,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Public Utilities, Requested Return on Equity, Percentage |
|
|
|
|
11.30%
|
|
|
|
|
|
|
|
|
|
|
|
| Requested Storm Damage Expense Rider Expense |
|
$ 32,000,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Distribution System Improvement Reset Percent |
|
0.00%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| PPL Electric Utilities Corp [Member] | Pennsylvania Public Utility Commission | Forecast [Member] |
|
|
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|
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|
|
| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
|
|
|
|
|
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|
|
|
|
|
|
|
|
| Total Projected Cost of Information Technology Upgrades |
|
|
|
|
|
|
|
|
|
|
|
54,000,000
|
|
|
|
|
| Total Projected Cost of Information Technology Upgrades |
|
|
|
|
|
|
|
|
|
|
|
$ 54,000,000
|
|
|
|
|
| PPL Electric Utilities Corp [Member] | Pennsylvania Public Utility Commission | Electric Rates |
|
|
|
|
|
|
|
|
|
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|
|
| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Public Utilities, Requested Rate Increase (Decrease), Amount |
|
$ 275,000,000
|
|
|
$ 356,000,000
|
|
|
|
|
|
|
|
|
|
|
|
| Public Utilities, Requested Rate Increase (Decrease), Percentage |
|
|
|
|
8.60%
|
|
|
|
|
|
|
|
|
|
|
|
| Public Utilities, Requested Rate Increase (Decrease), Amount Already Included In Customer Bills |
|
|
|
|
$ 50,000,000
|
|
|
|
|
|
|
|
|
|
|
|
| Public Utilities, Requested Rate Increase (Decrease), Amount |
|
$ 275,000,000
|
|
|
$ 356,000,000
|
|
|
|
|
|
|
|
|
|
|
|
| Public Utilities, Requested Rate Increase (Decrease), Percentage |
|
|
|
|
8.60%
|
|
|
|
|
|
|
|
|
|
|
|
| Louisville Gas And Electric Co [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Regulatory assets |
|
|
|
|
|
|
477,000,000
|
|
|
477,000,000
|
|
|
|
482,000,000
|
|
|
| Louisville Gas And Electric Co [Member] | Mill Creek Unit 2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Public Utilities, Property, Plant and Equipment, Generation or Processing |
|
|
|
|
|
|
188,000,000
|
|
|
188,000,000
|
|
|
|
|
|
|
| Louisville Gas And Electric Co [Member] | Storm Costs [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Regulatory assets |
|
|
|
|
|
|
22,000,000
|
|
|
22,000,000
|
|
|
|
24,000,000
|
|
|
| Louisville Gas And Electric Co [Member] | Kentucky Public Service Commission [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Regulatory Matters [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Public Utilities, Approved Return on Equity for Capital Rate Adjustment Mechanism, Percentage |
|
|
9.675%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Public Utilities, Approved Return on Equity, Percentage |
|
|
9.775%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Louisville Gas And Electric Co [Member] | Kentucky Public Service Commission [Member] | Electric Rates |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Public Utilities, Approved Rate Increase (Decrease), Amount |
|
|
$ 59,000,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Public Utilities, Approved Rate Increase (Decrease), Amount |
|
|
59,000,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Louisville Gas And Electric Co [Member] | Kentucky Public Service Commission [Member] | Gas Rates |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Public Utilities, Approved Rate Increase (Decrease), Amount |
|
|
46,000,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Public Utilities, Approved Rate Increase (Decrease), Amount |
|
|
$ 46,000,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Kentucky Utilities Co [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Regulatory assets |
|
|
|
|
|
|
463,000,000
|
|
|
463,000,000
|
|
|
|
467,000,000
|
|
|
| Kentucky Utilities Co [Member] | Storm Costs [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Regulatory assets |
|
|
|
|
|
|
$ 34,000,000
|
|
|
$ 34,000,000
|
|
|
|
$ 38,000,000
|
|
|
| Kentucky Utilities Co [Member] | Kentucky Public Service Commission [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Regulatory Matters [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Public Utilities, Approved Return on Equity for Capital Rate Adjustment Mechanism, Percentage |
|
|
9.675%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Public Utilities, Approved Return on Equity, Percentage |
|
|
9.775%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Kentucky Utilities Co [Member] | Kentucky Public Service Commission [Member] | Electric Rates |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Public Utilities, Approved Rate Increase (Decrease), Amount |
|
|
$ 128,000,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Public Utilities, Approved Rate Increase (Decrease), Amount |
|
|
$ 128,000,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Kentucky Utilities Co [Member] | Virginia State Corporation Commission | Electric Rates |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Public Utilities, Requested Rate Increase (Decrease), Amount |
$ 19,000,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Public Utilities, Requested Return on Equity, Percentage |
10.95%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Public Utilities, Requested Rate Increase (Decrease), Amount |
$ 19,000,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Public Utilities, Requested Return on Equity, Percentage |
10.95%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|