SCHEDULE I - PPL CORPORATION CONDENSED UNCONSOLIDATED STATEMENTS OF CASH FLOWS (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash Flows from Operating Activities [Abstract]
Net cash provided by (used in) operating activities	$ 2,507	$ 2,033	$ 1,852
Cash Flows from Investing Activities [Abstract]
Net cash provided by (used in) investing activities	(7,952)	(8,229)	(880)
Cash Flows from Financing Activities [Abstract]
Issuance of equity, net of issuance costs	2,297	2,441	60
Net increase (decrease) in short-term debt from affiliates	(125)	70	(52)
Payment of common stock dividends	(746)	(566)	(517)
Other	(92)	(31)	(23)
Net cash provided by (used in) financing activities	5,767	6,307	(1,271)
Net Increase (Decrease) in Cash and Cash Equivalents	277	124	(299)
Cash and Cash Equivalents at Beginning of Period	925	801	1,100
Cash and Cash Equivalents at End of Period	1,202	925	801
PPL Corp [Member]
Cash Flows from Operating Activities [Abstract]
Net cash provided by (used in) operating activities	880	713	995
Cash Flows from Investing Activities [Abstract]
Capital contributions to affiliated subsidiaries	(827)	(2,709)	(642)
Acquisition of LKE	0	(6,842)	0
Return of capital from affiliated subsidiaries	549	150	100
Net cash provided by (used in) investing activities	(278)	(9,401)	(542)
Cash Flows from Financing Activities [Abstract]
Issuance of equity, net of issuance costs	2,297	2,441	60
Net increase (decrease) in short-term debt from affiliates	(2,071)	6,826	5
Payment of common stock dividends	(746)	(566)	(517)
Contract adjustment payment	(72)	(13)	0
Other	(10)	0	(1)
Net cash provided by (used in) financing activities	(602)	8,688	(453)
Net Increase (Decrease) in Cash and Cash Equivalents	0	0	0
Supplemental Disclosures of Cash Flow Information: [Abstract]
Cash Dividends Received from Affiliated Subsidiaries	812	507	717
Non-cash transactions: [Abstract]
Present value of contract adjustment payments	123	157	0
Reduction in Short-term debt with affiliates	0	2,784	0
Reduction in Affiliated companies at equity	$ 0	$ 2,784	$ 0