CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019
Cash Flows from Operating Activities
Net Income		$ 898	$ 907
Depreciation		636	584
Amortization		29	31
Defined benefit plans - (income) expense		(105)	(135)
Deferred income taxes and investment tax credits		169	154
Unrealized (gains) losses on derivatives, and other hedging activities		25	22
Stock-based compensation expense		12	19
Other		2	(7)
Change in current assets and current liabilities
Accounts receivable		10	22
Accounts payable		(98)	(102)
Unbilled revenues		107	70
Fuel, materials and supplies		6	19
Prepayments		(75)	(79)
Regulatory assets and liabilities, net		(47)	(72)
Accrued interest		(55)	(63)
Other current liabilities		(37)	(85)
Other		(7)	11
Other operating activities
Defined benefit plans - funding		(193)	(207)
Other assets		27	11
Other liabilities		(5)	(30)
Net cash provided by operating activities		1,299	1,070
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(1,576)	(1,474)
Purchase of investments		0	(55)
Proceeds from the sale of investments		9	61
Other investing activities		(6)	(11)
Net cash used in investing activities		(1,573)	(1,479)
Cash Flows from Financing Activities
Issuance of long-term debt		1,598	769
Retirement of long-term debt		0	(200)
Proceeds from project financing		96	0
Issuance of common stock		33	35
Payment of common stock dividends		(636)	(594)
Issuance of term loan		300	0
Net increase (decrease) in short-term debt		(619)	206
Other financing activities		(27)	(18)
Net cash provided by (used in) financing activities		745	198
Effect of Exchange Rates on Cash, Cash Equivalents and Restricted Cash		(6)	(4)
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash		465	(215)
Cash and Cash Equivalents at Beginning of Period		815
Cash, Cash Equivalents and Restricted Cash at Beginning of Period		836	643
Cash and Cash Equivalents at End of Period		1,278
Cash, Cash Equivalents and Restricted Cash at End of Period		1,301	428
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at June 30,		291	278
Accrued expenditures for intangible assets at June 30,		81	59
PPL Electric Utilities Corp [Member]
Cash Flows from Operating Activities
Net Income	[1]	236	215
Depreciation		199	191
Amortization		13	11
Deferred income taxes and investment tax credits		61	36
Other		4	(9)
Change in current assets and current liabilities
Accounts receivable		(19)	7
Accounts payable		(37)	(39)
Unbilled revenues		44	31
Fuel, materials and supplies		(15)	(1)
Prepayments		(59)	(64)
Regulatory assets and liabilities, net		(32)	(40)
Taxes payable		(11)	(4)
Other		(10)	(6)
Other operating activities
Defined benefit plans - funding		(21)	(21)
Other assets		5	4
Other liabilities		2	3
Net cash provided by operating activities		360	314
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(556)	(533)
Other investing activities		(2)	3
Net cash used in investing activities		(558)	(530)
Cash Flows from Financing Activities
Payment of common stock dividends to parent		(246)	(215)
Net increase (decrease) in short-term debt		200	185
Contributions from parent		255	0
Return of capital to parent		(260)	0
Other financing activities		0	(1)
Net cash provided by (used in) financing activities		(51)	(31)
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash		(249)	(247)
Cash and Cash Equivalents at Beginning of Period		262
Cash, Cash Equivalents and Restricted Cash at Beginning of Period		264	269
Cash and Cash Equivalents at End of Period		13
Cash, Cash Equivalents and Restricted Cash at End of Period		15	22
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at June 30,		158	158
LG And E And KU Energy LLC [Member]
Cash Flows from Operating Activities
Net Income	[2]	218	230
Depreciation		300	258
Amortization		10	16
Defined benefit plans - (income) expense		7	5
Deferred income taxes and investment tax credits		38	47
Other		(1)	(1)
Change in current assets and current liabilities
Accounts receivable		33	24
Accounts payable		(36)	(34)
Accounts payable to affiliates		(2)	0
Unbilled revenues		15	13
Fuel, materials and supplies		24	21
Regulatory assets and liabilities, net		(15)	(32)
Taxes payable		16	(25)
Accrued interest		1	7
Other		(30)	(23)
Other operating activities
Defined benefit plans - funding		(24)	(28)
Expenditures for asset retirement obligations		(31)	(45)
Other assets		(2)	(1)
Other liabilities		13	13
Net cash provided by operating activities		534	445
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(479)	(530)
Other investing activities		3	0
Net cash used in investing activities		(476)	(530)
Cash Flows from Financing Activities
Issuance of long-term debt		498	705
Retirement of long-term debt		0	(200)
Net increase in notes payable with affiliate		102	90
Distributions to member		(140)	(137)
Contributions from member		0	63
Net increase (decrease) in short-term debt		(388)	(418)
Other financing activities		(5)	(10)
Net cash provided by (used in) financing activities		67	93
Cash and Cash Equivalents, Period Increase (Decrease)		125	8
Cash and Cash Equivalents at Beginning of Period		27	24
Cash and Cash Equivalents at End of Period		152	32
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at June 30,		90	91
Louisville Gas And Electric Co [Member]
Cash Flows from Operating Activities
Net Income	[3]	120	108
Depreciation		129	107
Amortization		4	11
Defined benefit plans - (income) expense		1	1
Deferred income taxes and investment tax credits		2	28
Change in current assets and current liabilities
Accounts receivable		18	15
Accounts receivable from affiliates		2	6
Accounts payable		(25)	(16)
Accounts payable to affiliates		(9)	(4)
Unbilled revenues		8	9
Fuel, materials and supplies		20	27
Regulatory assets and liabilities, net		4	(13)
Taxes payable		21	(7)
Accrued interest		0	4
Other		(9)	(8)
Other operating activities
Defined benefit plans - funding		(5)	(4)
Expenditures for asset retirement obligations		(8)	(12)
Other assets		(2)	(1)
Other liabilities		4	7
Net cash provided by operating activities		275	258
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(214)	(224)
Net cash used in investing activities		(214)	(224)
Cash Flows from Financing Activities
Issuance of long-term debt		0	399
Retirement of long-term debt		0	(200)
Net increase in notes payable with affiliate		190	0
Payment of common stock dividends to parent		(76)	(71)
Net increase (decrease) in short-term debt		(238)	(183)
Contributions from parent		53	25
Other financing activities		0	(5)
Net cash provided by (used in) financing activities		(71)	(35)
Cash and Cash Equivalents, Period Increase (Decrease)		(10)	(1)
Cash and Cash Equivalents at Beginning of Period		15	10
Cash and Cash Equivalents at End of Period		5	9
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at June 30,		49	40
Kentucky Utilities Co [Member]
Cash Flows from Operating Activities
Net Income	[4]	133	142
Depreciation		170	150
Amortization		4	5
Deferred income taxes and investment tax credits		5	29
Other		(1)	(2)
Change in current assets and current liabilities
Accounts receivable		15	14
Accounts payable		(7)	(8)
Accounts payable to affiliates		(15)	(15)
Unbilled revenues		7	4
Fuel, materials and supplies		4	(6)
Regulatory assets and liabilities, net		(19)	(19)
Taxes payable		24	(2)
Accrued interest		1	3
Other		(12)	1
Other operating activities
Defined benefit plans - funding		(1)	(2)
Expenditures for asset retirement obligations		(23)	(33)
Other assets		0	1
Other liabilities		8	8
Net cash provided by operating activities		293	270
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(264)	(305)
Net (increase) decrease in notes receivable from affiliate		190	0
Other investing activities		3	0
Net cash used in investing activities		(451)	(305)
Cash Flows from Financing Activities
Issuance of long-term debt		498	306
Payment of common stock dividends to parent		(89)	(91)
Net increase (decrease) in short-term debt		(150)	(235)
Contributions from parent		37	68
Other financing activities		(5)	(4)
Net cash provided by (used in) financing activities		291	44
Cash and Cash Equivalents, Period Increase (Decrease)		133	9
Cash and Cash Equivalents at Beginning of Period		12	14
Cash and Cash Equivalents at End of Period		145	23
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at June 30,		$ 41	$ 52

[1] Net income equals comprehensive income.

[2] Net income approximates comprehensive income.

[3] Net income equals comprehensive income.

[4] Net income equals comprehensive income.