Segment and Related Information (Details) (USD $) In Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010		Dec. 31, 2010
Income Statement Data
Revenues from external customers	$ 3,120		$ 2,179		$ 8,519		$ 6,658
Net Income Attributable to PPL	444		248		1,041		583
Balance Sheet Data
Assets	40,956				40,956				32,837
Kentucky Regulated [Member]
Income Statement Data
Revenues from external customers	736		0		2,140
Net Income Attributable to PPL	78		0		184		0
Balance Sheet Data
Assets	10,304	[1]			10,304	[1]			10,318	[1]
International Regulated [Member]
Income Statement Data
Revenues from external customers	493		172		1,138		563
Net Income Attributable to PPL	138		93		231		227
Balance Sheet Data
Assets	13,513				13,513				4,800
Pennsylvania Regulated [Member]
Income Statement Data
Revenues from external customers	454		570		1,444		1,901
Intersegment revenues	1		1		9		5
Net Income Attributable to PPL	28		36		116		89
Balance Sheet Data
Assets	5,385				5,385				5,189
Supply [Member]
Income Statement Data
Revenues from external customers	1,437	[2]	1,437	[2]	3,797	[2]	4,194	[2]
Intersegment revenues	5	[3]	71	[3]	15	[3]	250	[3]
Net Income Attributable to PPL	200	[2],[4]	153	[2]	510	[2],[4]	320	[2]
Balance Sheet Data
Assets	11,754	[1]			11,754	[1]			12,530	[1]
Segment (Numeric) [Abstract]
The after-tax earnings impact, including reduced energy sales margins due to outage					63
Unallocated [Member]
Income Statement Data
Net Income Attributable to PPL	$ 0		$ (34)	[5]	$ 0		$ (53)	[5]

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

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

[3] See "PLR Contracts/Purchase of Accounts Receivable" in Note 11 for a discussion of the basis of accounting between reportable segments.

[4] In April 2011, during the PPL Susquehanna Unit 2 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 that unit's turbine blades. This inspection revealed cracked blades similar to those found in Unit 2. Replacement of these blades was completed, significantly extending these outages. The after-tax earnings impact, including reduced energy sales margins and repair expense for both units was $63 million for the nine months ended September 30, 2011.

[5] Represents LKE acquisition-related costs and 2010 Bridge Facility financing costs.