Segment and Related Information (Details) (USD $) In Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2011		Jun. 30, 2010
Income Statement Data
Revenues from external customers	$ 2,489		$ 1,473		$ 5,399		$ 4,479
Net Income Attributable to PPL	196		85		597		335
Balance Sheet Data
Assets	40,537		32,837		40,537		32,837
Kentucky Regulated [Member]
Income Statement Data
Revenues from external customers	638	[1]			1,404	[1]
Net Income Attributable to PPL	31	[1]			106	[1]
Balance Sheet Data
Assets	10,087	[2]	10,318	[2]	10,087	[2]	10,318	[2]
International Regulated [Member]
Income Statement Data
Revenues from external customers	420		178		645		391
Net Income Attributable to PPL	38	[3]	58	[3]	93	[3]	134	[3]
Balance Sheet Data
Assets	13,387		4,800		13,387		4,800
Pennsylvania Regulated [Member]
Income Statement Data
Revenues from external customers	436		520		990		1,331
Intersegment revenues	4		2		8		4
Net Income Attributable to PPL	36		16		88		53
Balance Sheet Data
Assets	5,086		5,189		5,086		5,189
Supply [Member]
Income Statement Data
Revenues from external customers	995	[3]	775	[3]	2,360	[3]	2,757	[3]
Intersegment revenues	4	[4]	64	[4]	10	[4]	179	[4]
Net Income Attributable to PPL	91	[3],[5],[6]	30	[3],[5]	310	[3],[5],[6]	167	[3],[5]
Balance Sheet Data
Assets	11,977	[2]	12,530	[2]	11,977	[2]	12,530	[2]
Unallocated [Member]
Income Statement Data
Net Income Attributable to PPL			$ (19)	[7]			$ (19)	[7]

[1] This segment primarily includes the operating activities and assets of LKE, which was acquired in November 2010. Net income attributable to PPL includes the allocation of interest expense from the 2010 Equity Units issued to fund the acquisition and interest rate swaps.

[2] A portion of the goodwill related to the 2010 LKE acquisition has been attributed to PPL's Supply segment.

[3] Includes unrealized gains and losses from economic activity. See Note 14 for additional information.

[4] See "PLR Contracts" in Note 11 for a discussion of the basis of accounting between reportable segments.

[5] Either includes Discontinued Operations or is reported in Discontinued Operations. See Note 8 for additional information.

[6] In April 2011, during the PPL Susquehanna Unit 2 scheduled refueling and generation uprate outage, a planned inspection of the Unit 2 turbine revealed cracks in certain of its low pressure turbine blades. As a precaution, PPL Susquehanna also took Unit 1 out of service in mid-May to inspect the turbine blades in that unit. This inspection revealed cracked blades similar to those found in Unit 2. Replacement of these blades was completed, which significantly extended these outages. PPL Energy Supply incurred an after-tax earnings impact, including reduced energy sales margins and repair expense for both units, of approximately $60 million in the three and six months ended June 30, 2011.

[7] Represents 2010 Bridge Facility financing costs and other costs related to the acquisition of LKE.