Retirement and Postemployment Benefits (Weighted-Average Assumptions, Cost Trend Rates and Funded Status) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pension Plan [Member]
Weighted Average Assumptions Used in the Valuation of the Benefit Obligations (Details) [Abstract]
Benefit obligations valuation discount rate	5.52%	5.80%
Benefit obligations valuation rate of compensation increase	3.43%	3.77%
Weighted Average Assumptions Used to Determine the Net Periodic Benefit Costs (Details) [Abstract]
Net periodic benefit costs discount rate	5.52%	3.35%	2.92%
Net periodic benefit costs rate of compensation increase	3.43%	3.74%	3.76%
Net periodic benefit costs expected return on plan assets	8.25%	7.25%	7.25%
Assumed Health Care Cost Trend Rates (Details) [Abstract]
Health care cost trend rate assumed for next year, obligations	6.25%	6.50%	6.25%
Health care cost trend rate assumed for next year, cost	6.50%	6.25%	6.50%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate), obligations	5.00%	5.00%	5.00%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate), cost	5.00%	5.00%	5.00%
Year that the rate reaches the ultimate trend rate, obligations	2029	2029	2027
Year that the rate reaches the ultimate trend rate, cost	2029	2027	2027
Change in Benefit Obligation [Roll Forward]
Benefit Obligation, beginning of period	$ 3,333	$ 3,989
Service cost	34	51	$ 56
Interest cost	188	144	121
Participant contributions	0	0
Plan Amendments	3	0
Actuarial (gain) loss	179	(1,026)
Acquisition	0	553
Settlements	(3)	(111)
Gross benefits paid	(280)	(267)
Benefit Obligation, end of period	3,454	3,333	3,989
Change in Plan Assets [Roll Forward]
Balance at beginning of period	3,149	3,887
Actual return on plan assets	297	(992)
Employer contributions	13	9
Participant contributions	0	0
Acquisition	0	623
Settlements	(3)	(111)
Gross benefits paid	(280)	(267)
Balance at end of period	3,176	3,149	$ 3,887
Funded Status, end of period	(278)	(184)
Amounts recognized in the Balance Sheets consist of: [Abstract]
Noncurrent asset	7	33
Current liability	(10)	(10)
Noncurrent liability	(275)	(207)
Net amount recognized, end of period	(278)	(184)
Amounts recognized in AOCI and regulatory assets/liabilities (pre-tax): [Abstract]
Prior service cost (credit)	11	14
Net actuarial (gain) loss	1,017	827
Total	1,028	841
Total accumulated benefit obligation for defined benefit pension plans	3,312	3,197
Changes in Plan Assets and Benefit Obligations Recognized in AOCI and Regulatory Assets/Liabilities by Type (Details) [Abstract]
AOCI	235	183
Regulatory assets/liabilities	793	658
Total	1,028	841
Pension Plans Where the Projected or Accumulated Benefit Obligation Exceed the Fair Value of Plan Assets (Details) [Abstract]
Projected benefit obligations	2,891	2,818
Fair value of plan assets where the projected benefit obligations exceed the value of plan assets	2,606	2,601
Accumulated benefit obligation	1,773	1,720
Fair value of plan assets where the accumulated benefit obligations exceed the value of plan assets	$ 1,594	$ 1,581
Other Postretirement Benefits Plan [Member]
Weighted Average Assumptions Used in the Valuation of the Benefit Obligations (Details) [Abstract]
Benefit obligations valuation discount rate	5.54%	5.81%
Benefit obligations valuation rate of compensation increase	3.43%	3.78%
Weighted Average Assumptions Used to Determine the Net Periodic Benefit Costs (Details) [Abstract]
Net periodic benefit costs discount rate	5.54%	3.54%	2.84%
Net periodic benefit costs rate of compensation increase	3.43%	2.84%	3.75%
Net periodic benefit costs expected return on plan assets	7.38%	6.52%	6.48%
Change in Benefit Obligation [Roll Forward]
Benefit Obligation, beginning of period	$ 534	$ 504
Service cost	6	7	$ 6
Interest cost	30	20	16
Participant contributions	9	9
Plan Amendments	0	0
Actuarial (gain) loss	18	(114)
Acquisition	0	163
Settlements	0	0
Gross benefits paid	(59)	(55)
Benefit Obligation, end of period	538	534	504
Change in Plan Assets [Roll Forward]
Balance at beginning of period	417	367
Actual return on plan assets	54	(86)
Employer contributions	16	19
Participant contributions	7	7
Acquisition	0	160
Settlements	0	0
Gross benefits paid	(56)	(50)
Balance at end of period	438	417	$ 367
Funded Status, end of period	(100)	(117)
Amounts recognized in the Balance Sheets consist of: [Abstract]
Noncurrent asset	10	9
Current liability	(14)	(14)
Noncurrent liability	(96)	(112)
Net amount recognized, end of period	(100)	(117)
Amounts recognized in AOCI and regulatory assets/liabilities (pre-tax): [Abstract]
Prior service cost (credit)	10	11
Net actuarial (gain) loss	(96)	(95)
Total	(86)	(84)
Changes in Plan Assets and Benefit Obligations Recognized in AOCI and Regulatory Assets/Liabilities by Type (Details) [Abstract]
AOCI	14	13
Regulatory assets/liabilities	(100)	(97)
Total	(86)	(84)
PPL Electric Utilities Corp [Member] | Pension Plan [Member] | PPL Services Funded Status Allocation [Member]
Change in Plan Assets [Roll Forward]
Funded Status, end of period	(65)	(34)
PPL Electric Utilities Corp [Member] | Other Postretirement Benefits Plan [Member] | PPL Services Funded Status Allocation [Member]
Change in Plan Assets [Roll Forward]
Funded Status, end of period	(55)	(60)
Louisville Gas And Electric Co [Member] | Pension Plan [Member] | LKE Funded Status Allocation [Member]
Change in Plan Assets [Roll Forward]
Funded Status, end of period	34	41
Louisville Gas And Electric Co [Member] | Other Postretirement Benefits Plan [Member] | LKE Funded Status Allocation [Member]
Change in Plan Assets [Roll Forward]
Funded Status, end of period	(44)	(41)
Kentucky Utilities Co [Member] | Pension Plan [Member] | LKE Funded Status Allocation [Member]
Change in Plan Assets [Roll Forward]
Funded Status, end of period	51	44
Kentucky Utilities Co [Member] | Other Postretirement Benefits Plan [Member] | LKE Funded Status Allocation [Member]
Change in Plan Assets [Roll Forward]
Funded Status, end of period	$ (9)	$ (9)