Utility Rate Regulation (Regulatory Liabilities) (Details) - USD ($) $ in Millions	May 21, 2020	Dec. 31, 2022	Dec. 31, 2021
Regulatory Liabilities [Line Items]
Current regulatory liabilities		$ 238	$ 182
Noncurrent regulatory liabilities		3,412	2,422
Generation Supply Charge [Member]
Regulatory Liabilities [Line Items]
Current regulatory liabilities		37	10
Universal Service Rider [Member]
Regulatory Liabilities [Line Items]
Current regulatory liabilities		0	17
Transmission Formula Rate [Member]
Regulatory Liabilities [Line Items]
Current regulatory liabilities		12	0
TCJA customer refund [Member]
Regulatory Liabilities [Line Items]
Current regulatory liabilities		15	22
Act 129 Compliance Rider [Member]
Regulatory Liabilities [Line Items]
Current regulatory liabilities		14	10
Regulatory Liability due to ROE Reserve
Regulatory Liabilities [Line Items]
Current regulatory liabilities		0	73
Economic relief billing credit
Regulatory Liabilities [Line Items]
Current regulatory liabilities		0	27
Accumulated cost of removal of utility plant [Member]
Regulatory Liabilities [Line Items]
Noncurrent regulatory liabilities		950	639
Power Purchase Agreement Ohio Valley Electric Corporation [Member]
Regulatory Liabilities [Line Items]
Noncurrent regulatory liabilities		26	35
Net deferred taxes [Member]
Regulatory Liabilities [Line Items]
Noncurrent regulatory liabilities		2,094	1,591
Defined Benefit Plans [Member]
Regulatory Liabilities [Line Items]
Noncurrent regulatory liabilities		187	95
Terminated interest rate swaps [Member]
Regulatory Liabilities [Line Items]
Noncurrent regulatory liabilities		60	62
Other Regulatory Liabilities [Member]
Regulatory Liabilities [Line Items]
Current regulatory liabilities		27	2
Noncurrent regulatory liabilities		63	0
Transmission Service Charge [Member]
Regulatory Liabilities [Line Items]
Current regulatory liabilities		14	21
Rate adjustment mechanism
Regulatory Liabilities [Line Items]
Current regulatory liabilities		96	0
Energy efficiency
Regulatory Liabilities [Line Items]
Current regulatory liabilities		23	0
Noncurrent regulatory liabilities		32	0
PPL Electric Utilities Corp [Member]
Regulatory Liabilities [Line Items]
Current regulatory liabilities		85	153
Noncurrent regulatory liabilities		820	559
Return on equity	11.18%
PPL Electric Utilities Corp [Member] | Generation Supply Charge [Member]
Regulatory Liabilities [Line Items]
Current regulatory liabilities		37	10
PPL Electric Utilities Corp [Member] | Universal Service Rider [Member]
Regulatory Liabilities [Line Items]
Current regulatory liabilities		0	17
PPL Electric Utilities Corp [Member] | Transmission Formula Rate [Member]
Regulatory Liabilities [Line Items]
Current regulatory liabilities		12	0
PPL Electric Utilities Corp [Member] | TCJA customer refund [Member]
Regulatory Liabilities [Line Items]
Current regulatory liabilities		15	22
PPL Electric Utilities Corp [Member] | Act 129 Compliance Rider [Member]
Regulatory Liabilities [Line Items]
Current regulatory liabilities		14	10
PPL Electric Utilities Corp [Member] | Regulatory Liability due to ROE Reserve
Regulatory Liabilities [Line Items]
Current regulatory liabilities		0	73
PPL Electric Utilities Corp [Member] | Economic relief billing credit
Regulatory Liabilities [Line Items]
Current regulatory liabilities		0	0
PPL Electric Utilities Corp [Member] | Accumulated cost of removal of utility plant [Member]
Regulatory Liabilities [Line Items]
Noncurrent regulatory liabilities		0	0
PPL Electric Utilities Corp [Member] | Power Purchase Agreement Ohio Valley Electric Corporation [Member]
Regulatory Liabilities [Line Items]
Noncurrent regulatory liabilities		0	0
PPL Electric Utilities Corp [Member] | Net deferred taxes [Member]
Regulatory Liabilities [Line Items]
Noncurrent regulatory liabilities		775	531
PPL Electric Utilities Corp [Member] | Defined Benefit Plans [Member]
Regulatory Liabilities [Line Items]
Noncurrent regulatory liabilities		45	28
PPL Electric Utilities Corp [Member] | Terminated interest rate swaps [Member]
Regulatory Liabilities [Line Items]
Noncurrent regulatory liabilities		0	0
PPL Electric Utilities Corp [Member] | Other Regulatory Liabilities [Member]
Regulatory Liabilities [Line Items]
Current regulatory liabilities		0	0
Noncurrent regulatory liabilities		0	0
PPL Electric Utilities Corp [Member] | Transmission Service Charge [Member]
Regulatory Liabilities [Line Items]
Current regulatory liabilities		7	21
PPL Electric Utilities Corp [Member] | Rate adjustment mechanism
Regulatory Liabilities [Line Items]
Current regulatory liabilities		0	0
PPL Electric Utilities Corp [Member] | Energy efficiency
Regulatory Liabilities [Line Items]
Current regulatory liabilities		0	0
Noncurrent regulatory liabilities		0	0
Louisville Gas And Electric Co [Member]
Regulatory Liabilities [Line Items]
Current regulatory liabilities		7	21
Noncurrent regulatory liabilities		833	818
Louisville Gas And Electric Co [Member] | Economic relief billing credit
Regulatory Liabilities [Line Items]
Current regulatory liabilities		0	21
Louisville Gas And Electric Co [Member] | Accumulated cost of removal of utility plant [Member]
Regulatory Liabilities [Line Items]
Noncurrent regulatory liabilities		287	262
Louisville Gas And Electric Co [Member] | Power Purchase Agreement Ohio Valley Electric Corporation [Member]
Regulatory Liabilities [Line Items]
Noncurrent regulatory liabilities		18	24
Louisville Gas And Electric Co [Member] | Net deferred taxes [Member]
Regulatory Liabilities [Line Items]
Noncurrent regulatory liabilities		477	491
Louisville Gas And Electric Co [Member] | Defined Benefit Plans [Member]
Regulatory Liabilities [Line Items]
Noncurrent regulatory liabilities		21	10
Louisville Gas And Electric Co [Member] | Terminated interest rate swaps [Member]
Regulatory Liabilities [Line Items]
Noncurrent regulatory liabilities		30	31
Louisville Gas And Electric Co [Member] | Other Regulatory Liabilities [Member]
Regulatory Liabilities [Line Items]
Current regulatory liabilities		7	0
Kentucky Utilities Co [Member]
Regulatory Liabilities [Line Items]
Current regulatory liabilities		6	8
Noncurrent regulatory liabilities		1,029	1,045
Kentucky Utilities Co [Member] | Economic relief billing credit
Regulatory Liabilities [Line Items]
Current regulatory liabilities		0	6
Kentucky Utilities Co [Member] | Accumulated cost of removal of utility plant [Member]
Regulatory Liabilities [Line Items]
Noncurrent regulatory liabilities		389	377
Kentucky Utilities Co [Member] | Power Purchase Agreement Ohio Valley Electric Corporation [Member]
Regulatory Liabilities [Line Items]
Noncurrent regulatory liabilities		8	11
Kentucky Utilities Co [Member] | Net deferred taxes [Member]
Regulatory Liabilities [Line Items]
Noncurrent regulatory liabilities		546	569
Kentucky Utilities Co [Member] | Defined Benefit Plans [Member]
Regulatory Liabilities [Line Items]
Noncurrent regulatory liabilities		56	57
Kentucky Utilities Co [Member] | Terminated interest rate swaps [Member]
Regulatory Liabilities [Line Items]
Noncurrent regulatory liabilities		30	31
Kentucky Utilities Co [Member] | Other Regulatory Liabilities [Member]
Regulatory Liabilities [Line Items]
Current regulatory liabilities		$ 6	$ 2