SCHEDULE I - CONDENSED UNCONSOLIDATED STATEMENTS OF CASH FLOWS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash Flows from Operating Activities [Abstract]
Net cash provided by (used in) operating activities	$ 2,890	$ 2,272	$ 2,941
Cash Flows from Investing Activities [Abstract]
Net cash provided by (used in) investing activities	(2,918)	(3,588)	(3,329)
Cash Flows from Financing Activities [Abstract]
Issuance of equity, net of issuance costs	144	203	1,074
Net increase (decrease) in short-term debt	29	94	147
Retirement of long-term debt	(930)	(1,000)	(237)
Issuance of long-term debt	1,342	2,236	296
Payment of common stock dividends	(1,030)	(1,004)	(967)
Other	(40)	(47)	(51)
Net cash provided by (used in) financing activities	(439)	482	262
Net Cash Provided by (Used in) Financing Activities	(439)	68	583
Net Increase (Decrease) in Cash and Cash Equivalents	(495)	(563)	536
Cash and Cash Equivalents at Beginning of Period	836	1,399	863
Cash and Cash Equivalents at End of Period	341	836	1,399
PPL Corp [Member]
Cash Flows from Operating Activities [Abstract]
Net cash provided by (used in) operating activities	1,563	993	1,633
Cash Flows from Investing Activities [Abstract]
Capital contributions to affiliated subsidiaries	(308)	(491)	(1,045)
Return of capital from affiliated subsidiaries	0	112	247
Net cash provided by (used in) investing activities	(308)	(379)	(798)
Cash Flows from Financing Activities [Abstract]
Issuance of equity, net of issuance costs	144	203	1,074
Net increase (decrease) in short-term debt with affiliates	(341)	215	(913)
Payment of common stock dividends	(1,030)	(1,004)	(967)
Contract adjustment payments on Equity Units	0	0	(22)
Other	(24)	(28)	(7)
Net Cash Provided by (Used in) Financing Activities	(1,251)	(614)	(835)
Cash and Cash Equivalents at Beginning of Period	0	0	0
Cash and Cash Equivalents at End of Period	4	0	0
Supplemental Disclosures of Cash Flow Information: [Abstract]
Cash Dividends Received from Subsidiaries	1,510	1,198	1,388
L G And E And K U Energy L L C Unconsolidated [Member]
Cash Flows from Operating Activities [Abstract]
Net cash provided by (used in) operating activities	285	246	(183)
Cash Flows from Investing Activities [Abstract]
Capital contributions to affiliated subsidiaries	(91)	(140)	(248)
Net decrease in notes receivable from affiliates	47	73	555
Net cash provided by (used in) investing activities	(44)	(67)	307
Cash Flows from Financing Activities [Abstract]
Net increase (decrease) in notes payable to affiliates	90	315	58
Net increase (decrease) in short-term debt	(75)	0	0
Retirement of long-term debt	0	(400)	0
Contributions from member	61	125	248
Distributions to member	(316)	(219)	(436)
Net cash provided by (used in) financing activities	(240)	(179)	(130)
Net Increase (Decrease) in Cash and Cash Equivalents	1	0	(6)
Cash and Cash Equivalents at Beginning of Period	0	0	6
Cash and Cash Equivalents at End of Period	1	0	0
Supplemental Disclosures of Cash Flow Information: [Abstract]
Cash Dividends Received from Subsidiaries	$ 376	$ 272	$ 260