CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017
Cash Flows from Operating Activities
Net Income		$ 1,412	$ 1,050
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation		817	745
Amortization		56	72
Defined benefit plans - (income) expense		(146)	(69)
Deferred income taxes and investment tax credits		255	284
Unrealized (gains) losses on derivatives, and other hedging activities		(129)	194
Stock-based compensation expense		21	30
Other		(12)	(8)
Change in current assets and current liabilities
Accounts receivable		38	25
Accounts payable		(55)	(93)
Unbilled revenues		129	81
Fuel, materials and supplies		25	35
Prepayments		(38)	(37)
Taxes payable		20	6
Regulatory assets and liabilities, net		39	(3)
Accrued interest		48	49
Other current liabilities		(36)	(53)
Other		(21)	5
Other operating activities
Defined benefit plans - funding		(284)	(558)
Proceeds from transfer of excess benefit funding		65	0
Other assets		(38)	4
Other liabilities		44	(5)
Net cash provided by operating activities		2,210	1,754
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(2,344)	(2,152)
Purchase of available-for-sale securities		(65)	0
Other investing activities		(57)	(16)
Net cash used in investing activities		(2,466)	(2,168)
Cash Flows from Financing Activities
Issuance of long-term debt		602	1,088
Retirement of long-term debt		(277)	(60)
Issuance of common stock		678	275
Payment of common stock dividends		(846)	(800)
Net increase (decrease) in short-term debt		481	269
Other financing activities		(20)	(34)
Net cash provided by (used in) financing activities		618	738
Effect of Exchange Rate on Cash, Cash Equivalents and Restricted Cash		(9)	7
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash		353	331
Cash and Cash Equivalents at Beginning of Period		485
Cash and Cash Equivalents at End of Period		842
Cash, Cash Equivalents and Restricted Cash at Beginning of Period		511	365
Cash, Cash Equivalents and Restricted Cash at End of Period		864	696
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at September 30,		311	373
Accrued expenditures for intangible assets at September 30,		70	60
PPL Electric Utilities Corp [Member]
Cash Flows from Operating Activities
Net Income	[1]	334	251
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation		262	228
Amortization		17	25
Defined benefit plans - (income) expense		2	10
Deferred income taxes and investment tax credits		77	129
Other		(13)	(8)
Change in current assets and current liabilities
Accounts receivable		22	7
Accounts payable		(46)	(38)
Unbilled revenues		45	30
Prepayments		(25)	(31)
Taxes payable		(1)	10
Regulatory assets and liabilities, net		(25)	0
Other		12	(9)
Other operating activities
Defined benefit plans - funding		(28)	(24)
Other assets		(37)	(2)
Other liabilities		54	(3)
Net cash provided by operating activities		650	575
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(835)	(851)
Net decrease in notes receivable from affiliate		0	(2)
Other investing activities		(2)	(5)
Net cash used in investing activities		(837)	(858)
Cash Flows from Financing Activities
Issuance of long-term debt		398	470
Net increase (decrease) in short-term debt		0	(295)
Contributions from parent		429	575
Payment of common stock dividends to parent		(271)	(231)
Other financing activities		(4)	(6)
Net cash provided by (used in) financing activities		552	513
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash		365	230
Cash and Cash Equivalents at Beginning of Period		49
Cash and Cash Equivalents at End of Period		414
Cash, Cash Equivalents and Restricted Cash at Beginning of Period		51	15
Cash, Cash Equivalents and Restricted Cash at End of Period		416	245
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at September 30,		171	190
LG And E And KU Energy LLC [Member]
Cash Flows from Operating Activities
Net Income		358	322
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation		354	324
Amortization		13	19
Defined benefit plans - (income) expense		12	19
Deferred income taxes and investment tax credits		71	173
Other		(2)	1
Change in current assets and current liabilities
Accounts receivable		8	18
Accounts payable		4	(30)
Accounts payable to affiliates		7	3
Unbilled revenues		54	19
Fuel, materials and supplies		17	34
Taxes payable		(11)	13
Regulatory assets and liabilities, net		62	(3)
Accrued interest		41	41
Other		(36)	2
Other operating activities
Defined benefit plans - funding		(126)	(32)
Expenditures for asset retirement obligations		(46)	(22)
Other assets		(1)	5
Other liabilities		8	14
Net cash provided by operating activities		787	920
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(826)	(579)
Other investing activities		1	4
Net cash used in investing activities		(825)	(575)
Cash Flows from Financing Activities
Net increase (decrease) in notes payable with affiliate		(145)	(4)
Issuance of long-term debt with affiliate		250	0
Issuance of long-term debt		118	60
Retirement of long-term debt		(27)	(60)
Distributions to member		(217)	(316)
Net increase (decrease) in short-term debt		60	5
Other financing activities		(2)	(3)
Net cash provided by (used in) financing activities		37	(318)
Cash and Cash Equivalents, Period Increase (Decrease)		(1)	27
Cash and Cash Equivalents at Beginning of Period		30	13
Cash and Cash Equivalents at End of Period		29	40
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at September 30,		108	142
Louisville Gas And Electric Co [Member]
Cash Flows from Operating Activities
Net Income	[1]	188	161
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation		146	136
Amortization		10	11
Defined benefit plans - (income) expense		2	5
Deferred income taxes and investment tax credits		46	96
Change in current assets and current liabilities
Accounts receivable		14	12
Accounts receivable from affiliates		2	6
Accounts payable		14	(12)
Accounts payable to affiliates		(2)	(10)
Unbilled revenues		30	11
Fuel, materials and supplies		9	6
Taxes payable		4	(15)
Regulatory assets and liabilities, net		24	(2)
Accrued interest		13	12
Other		(14)	8
Other operating activities
Defined benefit plans - funding		(59)	(3)
Expenditures for asset retirement obligations		(17)	(13)
Other assets		0	5
Other liabilities		0	4
Net cash provided by operating activities		410	418
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(420)	(293)
Net cash used in investing activities		(420)	(293)
Cash Flows from Financing Activities
Net increase (decrease) in notes payable with affiliate		0	10
Issuance of long-term debt		100	60
Retirement of long-term debt		0	(60)
Net increase (decrease) in short-term debt		(23)	21
Contributions from parent		43	0
Payment of common stock dividends to parent		(113)	(150)
Other financing activities		(1)	(2)
Net cash provided by (used in) financing activities		6	(121)
Cash and Cash Equivalents, Period Increase (Decrease)		(4)	4
Cash and Cash Equivalents at Beginning of Period		15	5
Cash and Cash Equivalents at End of Period		11	9
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at September 30,		51	83
Kentucky Utilities Co [Member]
Cash Flows from Operating Activities
Net Income	[2]	225	196
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation		208	188
Amortization		2	7
Defined benefit plans - (income) expense		0	3
Deferred income taxes and investment tax credits		37	116
Other		(2)	0
Change in current assets and current liabilities
Accounts receivable		2	6
Accounts receivable from affiliates		0	(1)
Accounts payable		(2)	(6)
Accounts payable to affiliates		(8)	(16)
Unbilled revenues		24	8
Fuel, materials and supplies		8	28
Taxes payable		11	(21)
Regulatory assets and liabilities, net		38	(1)
Accrued interest		21	22
Other		(4)	(5)
Other operating activities
Defined benefit plans - funding		(53)	(22)
Expenditures for asset retirement obligations		(29)	(9)
Other assets		(1)	0
Other liabilities		8	8
Net cash provided by operating activities		485	501
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(405)	(283)
Net increase in notes receivable with affiliates		0	(10)
Other investing activities		1	4
Net cash used in investing activities		(404)	(289)
Cash Flows from Financing Activities
Issuance of long-term debt		18	0
Retirement of long-term debt		(27)	0
Net increase (decrease) in short-term debt		83	(16)
Contributions from parent		45	0
Payment of common stock dividends to parent		(196)	(171)
Other financing activities		(1)	(1)
Net cash provided by (used in) financing activities		(78)	(188)
Cash and Cash Equivalents, Period Increase (Decrease)		3	24
Cash and Cash Equivalents at Beginning of Period		15	7
Cash and Cash Equivalents at End of Period		18	31
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at September 30,		$ 57	$ 58

[1] Net income equals comprehensive income.

[2] Net income approximates comprehensive income.