Utility Rate Regulation (Regulatory Matters) (Details) $ in Millions									1 Months Ended	3 Months Ended	12 Months Ended
	Nov. 06, 2023 MW	Sep. 27, 2023 USD ($)	Mar. 29, 2023 USD ($)	Mar. 21, 2023 USD ($)	Feb. 03, 2023 USD ($)	Jan. 27, 2023 USD ($)	Oct. 16, 2018	Aug. 24, 2018	Dec. 31, 2023 USD ($)	Mar. 31, 2015	Dec. 31, 2023 USD ($)	Nov. 21, 2023 USD ($)	Dec. 31, 2022 USD ($)
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Regulatory assets									$ 1,874		$ 1,874		$ 1,819
Mill Creek Unit 1
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Public Utilities, Property, Plant and Equipment, Generation or Processing									95		95
Public Utilities, Property, Plant and Equipment, Generation, Expected Remaining Book Value at Retirement									83		83
Mill Creek Unit 2
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Public Utilities, Property, Plant and Equipment, Generation or Processing									244		244
Public Utilities, Property, Plant and Equipment, Generation, Expected Remaining Book Value at Retirement									160		160
March 2023 Kentucky Wind Storms
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Amount of Regulatory Costs Not yet Approved									74		74
Storm Costs [Member]
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Regulatory assets									97		97		118
Other [Member]
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Regulatory assets									79		$ 79		69
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 [Member] | Pennsylvania Public Utility Commission [Member]
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Civil Penalty To Be Paid												$ 1
LGE [Member]
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
CPCN NGCC Combustion Turbine Facilities, Power | MW	640
CPCN Solar Photovoltaic Facility to be constructed, Power | MW	120
CPCN Solar Photovoltaic Facility to be Acquired, Power | MW	120
CPCN 4-Hour Battery Energy Storage Facility to be Constructed, Power | MW	125
Mill Creek 1 Unit, Generation Capacity, Power | MW	300
Mill Creek 2 Unit, Generation Capacity, Power | MW	297
LGE [Member] | March 2023 Kentucky Wind Storms
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Amount of Regulatory Costs Not yet Approved									33		$ 33
LGE [Member] | Kentucky Public Service Commission [Member]
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract]
Return on equity											9.35%
LGE [Member] | Kentucky Public Service Commission [Member] | Storm Costs [Member]
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Regulatory assets									$ 8		$ 8
LGE [Member] | Kentucky Public Service Commission [Member] | Environmental Cost Recovery [Member]
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract]
Amortization period for the deferred recovery of a regulatory asset									12 months		12 months
KU [Member]
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
CPCN NGCC Combustion Turbine Facilities, Power | MW	621
CPCN Solar Photovoltaic Facility to be constructed, Power | MW	120
CPCN Solar Photovoltaic Facility to be Acquired, Power | MW	120
E. W. Brown 3 Unit, Generating Capacity, Power | MW	412
Ghent 2 Unit, Generation Capacity, Power | MW	486
KU [Member] | March 2023 Kentucky Wind Storms
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Amount of Regulatory Costs Not yet Approved									$ 41		$ 41
KU [Member] | Kentucky Public Service Commission [Member]
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract]
Return on equity											9.35%
KU [Member] | Kentucky Public Service Commission [Member] | Storm Costs [Member]
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Regulatory assets									$ 11		$ 11
KU [Member] | Kentucky Public Service Commission [Member] | Environmental Cost Recovery [Member]
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract]
Amortization period for the deferred recovery of a regulatory asset									12 months		12 months
Rhode Island Energy | Federal Energy Regulatory Commission
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Initial minimum base ROE to be reset by the FERC										11.14%
Minimum base ROE reset by FERC										10.57%
New ROE proposed by NETO and approved by FERC							10.41%
Maximum Base ROE reset by FERC										11.74%
Rhode Island Energy | Federal Energy Regulatory Commission | Maximum ROE authorized
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
FERC Granted ROE											11.74%
Rhode Island Energy | Rhode Island Public Uitilty Commsion
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract]
Return on equity								9.275%
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Supplemental Capital Investment to spend on the FY 2024 Gas ISR Plan						$ 187
Supplemental Capital Investment to spend on the FY 2024 Electrical ISR Plan						176
RIPUC Approved FY 2024 Gas ISR Plan for capital investment spend			$ 163
2nd Supplemental Capital Investment to spend on the FY 2024 Electrical ISR Plan				$ 166
RIPUC approved FY 2024 Electric ISR Plan for capital investment spend			112
Recovery Cap on Capital Investment Related to AMF Program		$ 153
Supplemental Capital Investment Spend amount agreed to between RIE and RIPUC					$ 171
Capital Investment Spend on FY 2025 Gas ISR Plan									$ 185
Contingency Plan Spend on FY 2025 Gas ISR Plan									11
Capital Investment Spend on FY 2025 Electric ISR Plan									141
Rhode Island Energy | Rhode Island Public Uitilty Commsion | Vegetation Management
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Capital Investment Spend on FY 2025 Electric ISR Plan									13
Rhode Island Energy | Rhode Island Public Uitilty Commsion | Other O&M
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Capital Investment Spend on FY 2025 Electric ISR Plan									1
Rhode Island Energy | Rhode Island Public Uitilty Commsion | Vegetation Management
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Supplemental Capital Investment to spend on the FY 2024 Electrical ISR Plan						14
2nd Supplemental Capital Investment to spend on the FY 2024 Electrical ISR Plan				14
RIPUC approved FY 2024 Electric ISR Plan for capital investment spend			14
Rhode Island Energy | Rhode Island Public Uitilty Commsion | Other O&M
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Supplemental Capital Investment to spend on the FY 2024 Electrical ISR Plan						$ 3
2nd Supplemental Capital Investment to spend on the FY 2024 Electrical ISR Plan				$ 1
RIPUC approved FY 2024 Electric ISR Plan for capital investment spend			$ 1
Rhode Island Energy | Rhode Island Public Uitilty Commsion | Common equity percentage related to approved rate
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Percentage of common equity used on allowed ROE								51.00%
PPL Electric Utilities Corp [Member]
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Act 129 Recovery Period Under Phase IV Plan											5 years
Regulatory assets									598		$ 598		568
PPL Electric Utilities Corp [Member] | Storm Costs [Member]
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Regulatory assets									0		0		0
PPL Electric Utilities Corp [Member] | Other [Member]
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Regulatory assets									0		0		0
PPL Electric Utilities Corp [Member] | Pennsylvania Public Utility Commission [Member]
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Civil Penalty To Be Paid												$ 1
Louisville Gas And Electric Co [Member]
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
CPCN NGCC Combustion Turbine Facilities, Power | MW	640
CPCN Solar Photovoltaic Facility to be constructed, Power | MW	120
CPCN Solar Photovoltaic Facility to be Acquired, Power | MW	120
CPCN 4-Hour Battery Energy Storage Facility to be Constructed, Power | MW	125
New NGCC LG&E Planned Ownership Percentage	0.31
New Solar Units LG&E Planned Ownership Percentage	0.37
Mill Creek 1 Unit, Generation Capacity, Power | MW	300
Mill Creek 2 Unit, Generation Capacity, Power | MW	297
Regulatory assets									395		395		373
Louisville Gas And Electric Co [Member] | March 2023 Kentucky Wind Storms
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Amount of Regulatory Costs Not yet Approved									33		33
Louisville Gas And Electric Co [Member] | Storm Costs [Member]
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Regulatory assets									15		15		7
Louisville Gas And Electric Co [Member] | Other [Member]
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Regulatory assets									26		$ 26		14
Louisville Gas And Electric Co [Member] | Kentucky Public Service Commission [Member]
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] | Storm Costs [Member]
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Regulatory assets									$ 8		$ 8
Louisville Gas And Electric Co [Member] | Kentucky Public Service Commission [Member] | Environmental Cost Recovery [Member]
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract]
Amortization period for the deferred recovery of a regulatory asset									12 months		12 months
Kentucky Utilities Co [Member]
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
CPCN NGCC Combustion Turbine Facilities, Power | MW	621
CPCN Solar Photovoltaic Facility to be constructed, Power | MW	120
CPCN Solar Photovoltaic Facility to be Acquired, Power | MW	120
CPCN 4-Hour Battery Energy Storage Facility to be Constructed, Power | MW	125
New Solar Units LG&E Planned Ownership Percentage	0.63
New NGCC KU Planned Ownership Percentage	0.69
E. W. Brown 3 Unit, Generating Capacity, Power | MW	412
Ghent 2 Unit, Generation Capacity, Power | MW	486
Regulatory assets									$ 439		$ 439		442
Kentucky Utilities Co [Member] | March 2023 Kentucky Wind Storms
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Amount of Regulatory Costs Not yet Approved									41		41
Kentucky Utilities Co [Member] | Storm Costs [Member]
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Regulatory assets									14		14		3
Kentucky Utilities Co [Member] | Other [Member]
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Regulatory assets									17		$ 17		$ 13
Kentucky Utilities Co [Member] | Kentucky Public Service Commission [Member]
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract]
Return on equity											9.35%
Kentucky Utilities Co [Member] | Kentucky Public Service Commission [Member] | Storm Costs [Member]
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract]
Regulatory assets									$ 11		$ 11
Kentucky Utilities Co [Member] | Kentucky Public Service Commission [Member] | Environmental Cost Recovery [Member]
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract]
Amortization period for the deferred recovery of a regulatory asset									12 months		12 months