Utility Rate Regulation (Regulatory Matters) (Details) - USD ($) $ in Millions					1 Months Ended	11 Months Ended	12 Months Ended		24 Months Ended	60 Months Ended
	Jun. 01, 2023	Dec. 06, 2021	Nov. 25, 2020	May 21, 2020	Aug. 31, 2021	Nov. 30, 2021	May 31, 2023	Dec. 31, 2021	May 31, 2022	May 31, 2026
Kentucky Public Service Commission [Member] | Electric And Gas Rates [Member]
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract]
Dollar amount requested increase in base rates with anticipated rate case filing			$ 331
Public Utilities, Approved Rate Increase (Decrease), Amount		$ 207
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Public Utilities, Requested Bill Credit			$ 53
LGE [Member]
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Requested Billing Credit Period		1 year
Stay Out Commitment Period		4 years
LGE [Member] | Kentucky Public Service Commission [Member]
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract]
Return on equity		9.425%
Requested return on equity			10.00%
LGE [Member] | Kentucky Public Service Commission [Member] | Environmental Cost Recovery [Member]
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract]
Return on equity								9.35%
Amortization period for the deferred recovery of a regulatory asset								12 months
LGE [Member] | Kentucky Public Service Commission [Member] | Environmental Cost Recovery and Gas Line Tracker
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract]
Return on equity		9.35%
LGE [Member] | Kentucky Public Service Commission [Member] | Gas Rates [Member]
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract]
Dollar amount requested increase in base rates with anticipated rate case filing			$ 30
Public Utilities, Requested Rate Increase (Decrease), Percentage			8.30%
Public Utilities, Approved Rate Increase (Decrease), Amount		$ 23
LGE [Member] | Kentucky Public Service Commission [Member] | Electric And Gas Rates [Member]
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Public Utilities, Requested Bill Credit			$ 41
LGE [Member] | Kentucky Public Service Commission [Member] | Electric Rates [Member]
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract]
Dollar amount requested increase in base rates with anticipated rate case filing			$ 131
Public Utilities, Requested Rate Increase (Decrease), Percentage			11.60%
Public Utilities, Approved Rate Increase (Decrease), Amount		$ 74
KU [Member]
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Requested Billing Credit Period		1 year
Stay Out Commitment Period		4 years
KU [Member] | Kentucky Public Service Commission [Member]
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract]
Return on equity		9.425%
Requested return on equity			10.00%
KU [Member] | Kentucky Public Service Commission [Member] | Environmental Cost Recovery [Member]
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract]
Return on equity		9.35%						9.35%
Amortization period for the deferred recovery of a regulatory asset								12 months
KU [Member] | Kentucky Public Service Commission [Member] | Electric Rates [Member]
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract]
Dollar amount requested increase in base rates with anticipated rate case filing			$ 170
Public Utilities, Requested Rate Increase (Decrease), Percentage			10.40%
Public Utilities, Approved Rate Increase (Decrease), Amount		$ 110
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Public Utilities, Requested Bill Credit			$ 12
PPL Electric Utilities Corp [Member]
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract]
Return on equity				11.18%
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Amended Proposed Return On Equity From Complaint	10.00%						9.95%		990.00%
Regulatory Liability due to ROE Reserve, After Tax						$ 55
PPL Electric Utilities Corp [Member] | Period of 05-21-2020 to 12-31-2020
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Regulatory Liability due to ROE Reserve, Before Tax						28
Regulatory Liability due to ROE Reserve, After Tax						20
PPL Electric Utilities Corp [Member] | Period of 05-21-2020 to 11-30-2021
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Regulatory Liability due to ROE Reserve, Before Tax						73
Regulatory Liability due to ROE Reserve, After Tax						52
PPL Electric Utilities Corp [Member] | Maximum [Member]
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Public Utilities, Approved Equity Capital Structure, Percentage					56.00%
PPL Electric Utilities Corp [Member]
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract]
Return on equity				11.18%
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Amended Proposed Return On Equity From Complaint	10.00%						9.95%		990.00%
Regulatory Liability due to ROE Reserve, Before Tax						78
Regulatory Liability due to ROE Reserve, After Tax						55
PPL Electric Utilities Corp [Member] | Period of 05-21-2020 to 12-31-2020
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Regulatory Liability due to ROE Reserve, Before Tax						28
Regulatory Liability due to ROE Reserve, After Tax						20
PPL Electric Utilities Corp [Member] | Period of 05-21-2020 to 11-30-2021
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Regulatory Liability due to ROE Reserve, Before Tax						73
Regulatory Liability due to ROE Reserve, After Tax						52
PPL Electric Utilities Corp [Member] | Maximum [Member]
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Public Utilities, Approved Equity Capital Structure, Percentage					56.00%
PPL Electric Utilities Corp [Member] | PPL Electric [Member]
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Act 129 Recovery Period Under Phase IV Plan										5 years
PPL Electric Utilities Corp [Member] | PPL Electric Utilities Corp [Member]
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Regulatory Liability due to ROE Reserve, Before Tax						78
PPL Electric Utilities Corp [Member] | PPL Electric Utilities Corp [Member] | Period of 05-21-2020 to 11-30-2021
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Regulatory Liability due to ROE Reserve, Before Tax						$ 73
Louisville Gas And Electric Co [Member]
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Requested Billing Credit Period		1 year
Stay Out Commitment Period		4 years
Louisville Gas And Electric Co [Member] | Kentucky Public Service Commission [Member]
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract]
Return on equity		9.425%
Requested return on equity			10.00%
Louisville Gas And Electric Co [Member] | Kentucky Public Service Commission [Member] | Environmental Cost Recovery [Member]
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract]
Return on equity								9.35%
Amortization period for the deferred recovery of a regulatory asset								12 months
Louisville Gas And Electric Co [Member] | Kentucky Public Service Commission [Member] | Environmental Cost Recovery and Gas Line Tracker
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract]
Return on equity		9.35%
Louisville Gas And Electric Co [Member] | Kentucky Public Service Commission [Member] | Gas Rates [Member]
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract]
Dollar amount requested increase in base rates with anticipated rate case filing			$ 30
Public Utilities, Requested Rate Increase (Decrease), Percentage			8.30%
Public Utilities, Approved Rate Increase (Decrease), Amount		$ 23
Louisville Gas And Electric Co [Member] | Kentucky Public Service Commission [Member] | Electric And Gas Rates [Member]
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Public Utilities, Requested Bill Credit			$ 41
Louisville Gas And Electric Co [Member] | Kentucky Public Service Commission [Member] | Electric Rates [Member]
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract]
Dollar amount requested increase in base rates with anticipated rate case filing			$ 131
Public Utilities, Requested Rate Increase (Decrease), Percentage			11.60%
Public Utilities, Approved Rate Increase (Decrease), Amount		$ 74
Kentucky Utilities Co [Member]
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Requested Billing Credit Period		1 year
Stay Out Commitment Period		4 years
Kentucky Utilities Co [Member] | Kentucky Public Service Commission [Member]
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract]
Return on equity		9.425%
Requested return on equity			10.00%
Kentucky Utilities Co [Member] | Kentucky Public Service Commission [Member] | Environmental Cost Recovery [Member]
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract]
Return on equity		9.35%						9.35%
Amortization period for the deferred recovery of a regulatory asset								12 months
Kentucky Utilities Co [Member] | Kentucky Public Service Commission [Member] | Electric Rates [Member]
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract]
Dollar amount requested increase in base rates with anticipated rate case filing			$ 170
Public Utilities, Requested Rate Increase (Decrease), Percentage			10.40%
Public Utilities, Approved Rate Increase (Decrease), Amount		$ 110
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Public Utilities, Requested Bill Credit			$ 12