Document and Entity Information	9 Months Ended
	Sep. 30, 2011	Oct. 31, 2011
Document Entity Information [Line Items]
Document Type	10-Q
Document Period End Date	Sep. 30, 2011
Amendment Flag	false
Entity Registrant Name	PPL Corp
Entity Central Index Key	0000922224
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		578,298,607
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q3
PPL Energy Supply [Member]
Document Entity Information [Line Items]
Entity Registrant Name	PPL ENERGY SUPPLY LLC
Entity Central Index Key	0001161976
Entity Filer Category	Non-accelerated Filer
PPL Electric [Member]
Document Entity Information [Line Items]
Entity Registrant Name	PPL ELECTRIC UTILITIES CORP
Entity Central Index Key	0000317187
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		66,368,056
LKE [Member]
Document Entity Information [Line Items]
Entity Registrant Name	LG&E & KU Energy LLC
Entity Central Index Key	0001518339
Entity Filer Category	Non-accelerated Filer
LGE [Member]
Document Entity Information [Line Items]
Entity Registrant Name	LOUISVILLE GAS & ELECTRIC CO
Entity Central Index Key	0000060549
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		21,294,223
KU [Member]
Document Entity Information [Line Items]
Entity Registrant Name	KENTUCKY UTILITIES CO
Entity Central Index Key	0000055387
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		37,817,878