CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	Jun. 30, 2011	Dec. 31, 2010
Receivables Net Current [Abstract]
Accounts receivable reserve for uncollectible accounts	$ 39	$ 55
Property, Plant and Equipment
PP&E, net from the consolidation of a VIE	418	424
Other Noncurrent Assets
Other intangibles from the consolidation of a VIE	11	11
PPL Corporation Shareowners' Common Equity
Common stock par value	$ 0.01	$ 0.01
Common stock shares authorized	780,000	780,000
Common stock shares issued	577,265	483,391
Common stock shares outstanding	577,265	483,391
PPL Energy Supply [Member]
Receivables Net Current [Abstract]
Accounts receivable reserve for uncollectible accounts	1	20
Property, Plant and Equipment
PP&E, net from the consolidation of a VIE	418	424
Other Noncurrent Assets
Other intangibles from the consolidation of a VIE	11	11
PPL Electric [Member]
Receivables Net Current [Abstract]
Accounts receivable reserve for uncollectible accounts	16	17
PPL Corporation Shareowners' Common Equity
Common stock par value	$ 0	$ 0
Common stock shares authorized	170,000	170,000
Common stock shares issued	66,368	66,368
Common stock shares outstanding	66,368	66,368
LKE [Member]
Receivables Net Current [Abstract]
Accounts receivable reserve for uncollectible accounts	17	17
LGE [Member]
Receivables Net Current [Abstract]
Accounts receivable reserve for uncollectible accounts	2	2
PPL Corporation Shareowners' Common Equity
Common stock par value	$ 0	$ 0
Common stock shares authorized	75,000	75,000
Common stock shares issued	21,294	21,294
Common stock shares outstanding	21,294	21,294
KU [Member]
Receivables Net Current [Abstract]
Accounts receivable reserve for uncollectible accounts	$ 2	$ 6
PPL Corporation Shareowners' Common Equity
Common stock par value	$ 0	$ 0
Common stock shares authorized	80,000	80,000
Common stock shares issued	37,818	37,818
Common stock shares outstanding	37,818	37,818