CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Cash Flows from Operating Activities
Net income (loss)		$ (1,840)	$ 554
Loss (income) from discontinued operations (net of income taxes)		2,043	(350)
Income from continuing operations (net of income taxes)		203	204
Depreciation		267	250
Amortization		11	9
Defined benefit plans - (income) expense		4	9
Deferred income taxes and investment tax credits		50	75
Unrealized (gains) losses on derivatives, and other hedging activities		0	(4)
Stock-based compensation expense		6	6
Other		(5)	1
Change in current assets and current liabilities
Accounts receivable		(60)	0
Accounts payable		(42)	(42)
Unbilled revenues		76	62
Fuel, materials and supplies		41	12
Prepayments		(76)	(75)
Regulatory assets and liabilities, net		29	(25)
Accrued interest		69	66
Other current liabilities		(103)	(132)
Other		2	22
Other operating activities
Defined benefit plans - funding		(33)	(54)
Other assets		(74)	42
Other liabilities		31	(13)
Net cash provided by operating activities - continuing operations		396	413
Net cash provided by operating activities - discontinued operations		267	279
Net cash provided by operating activities		663	692
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(471)	(616)
Other investing activities		(1)	(3)
Net cash used in investing activities - continuing operations		(472)	(619)
Net cash used in investing activities - discontinued operations		(263)	(214)
Net cash used in investing activities		(735)	(833)
Cash Flows from Financing Activities
Proceeds from project financing		5	0
Issuance of common stock		1	20
Payment of common stock dividends		(320)	(317)
Issuance of term loan		0	200
Retirement of term loan		(300)	0
Retirement of commercial paper		(73)	0
Net increase (decrease) in short-term debt		752	388
Other financing activities		(10)	(8)
Net cash provided by financing activities - continuing operations		55	283
Net cash used in financing activities - discontinued operations		(126)	(43)
Net cash provided by (used in) financing activities		(71)	240
Effect of Exchange Rates on Cash, Cash Equivalents and Restricted Cash included in Discontinued Operations		8	1
Net (Increase) Decrease in Cash, Cash Equivalents and Restricted Cash included in Discontinued Operations		114	(23)
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash		(21)	77
Cash and Cash Equivalents at Beginning of Period		442
Cash, Cash Equivalents and Restricted Cash at Beginning of Period		443	660
Cash and Cash Equivalents at End of Period		421
Cash, Cash Equivalents and Restricted Cash at End of Period		422	737
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at March 31,		229	237
PPL Electric Utilities Corp [Member]
Cash Flows from Operating Activities
Net income (loss)	[1]	113	118
Depreciation		108	98
Amortization		6	5
Defined benefit plans - (income) expense		(3)	(1)
Deferred income taxes and investment tax credits		13	32
Other		(4)	9
Change in current assets and current liabilities
Accounts receivable		(37)	(26)
Accounts payable		(9)	(20)
Unbilled revenues		37	34
Prepayments		(78)	(76)
Regulatory assets and liabilities, net		39	(11)
Other		(14)	(21)
Other operating activities
Defined benefit plans - funding		(21)	(21)
Other assets		(27)	4
Other liabilities		(2)	8
Net cash provided by operating activities		121	132
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(223)	(280)
Expenditures for intangible assets		(1)	(1)
Other investing activities		2	0
Net cash used in investing activities		(222)	(281)
Cash Flows from Financing Activities
Payment of common stock dividends to parent		(115)	(165)
Net increase (decrease) in short-term debt		205	85
Net cash provided by (used in) financing activities		90	(80)
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash		(11)	(229)
Cash and Cash Equivalents at Beginning of Period		40
Cash, Cash Equivalents and Restricted Cash at Beginning of Period		40	264
Cash and Cash Equivalents at End of Period		29
Cash, Cash Equivalents and Restricted Cash at End of Period		29	35
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at March 31,		143	158
LG And E And KU Energy LLC [Member]
Cash Flows from Operating Activities
Net income (loss)	[2]	146	135
Depreciation		156	149
Amortization		4	4
Defined benefit plans - (income) expense		5	5
Deferred income taxes and investment tax credits		20	31
Change in current assets and current liabilities
Accounts receivable		3	20
Accounts payable		(4)	(18)
Accounts payable to affiliates		9	1
Unbilled revenues		39	27
Fuel, materials and supplies		42	24
Regulatory assets and liabilities, net		(10)	(14)
Taxes payable		(18)	(27)
Accrued interest		45	51
Other		(51)	(37)
Other operating activities
Defined benefit plans - funding		(2)	(23)
Expenditures for asset retirement obligations		(15)	(15)
Other assets		1	1
Other liabilities		6	6
Net cash provided by operating activities		376	320
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(238)	(255)
Net cash used in investing activities		(238)	(255)
Cash Flows from Financing Activities
Net increase in notes payable with affiliate		(24)	92
Distributions to member		(62)	(52)
Retirement of commercial paper		(73)	0
Net increase (decrease) in short-term debt		8	(85)
Net cash provided by (used in) financing activities		(151)	(45)
Cash and Cash Equivalents, Period Increase (Decrease)		(13)	20
Cash and Cash Equivalents at Beginning of Period		29	27
Cash and Cash Equivalents at End of Period		16	47
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at March 31,		86	78
Louisville Gas And Electric Co [Member]
Cash Flows from Operating Activities
Net income (loss)	[3]	75	73
Depreciation		66	64
Amortization		2	2
Defined benefit plans - (income) expense		1	1
Deferred income taxes and investment tax credits		(1)	1
Change in current assets and current liabilities
Accounts receivable		(1)	14
Accounts receivable from affiliates		(3)	(6)
Accounts payable		8	(12)
Accounts payable to affiliates		(5)	(4)
Unbilled revenues		19	11
Fuel, materials and supplies		28	27
Regulatory assets and liabilities, net		(10)	(2)
Taxes payable		4	2
Accrued interest		18	18
Other		(17)	(10)
Other operating activities
Defined benefit plans - funding		(1)	(4)
Expenditures for asset retirement obligations		(6)	(4)
Other assets		0	(1)
Other liabilities		4	1
Net cash provided by operating activities		181	171
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(111)	(117)
Net cash used in investing activities		(111)	(117)
Cash Flows from Financing Activities
Net increase in notes payable with affiliate		0	21
Retirement of commercial paper		(41)	0
Payment of common stock dividends to parent		(60)	(29)
Net increase (decrease) in short-term debt		31	(79)
Contributions from parent		0	25
Net cash provided by (used in) financing activities		(70)	(62)
Cash and Cash Equivalents, Period Increase (Decrease)		0	(8)
Cash and Cash Equivalents at Beginning of Period		7	15
Cash and Cash Equivalents at End of Period		7	7
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at March 31,		46	39
Kentucky Utilities Co [Member]
Cash Flows from Operating Activities
Net income (loss)	[4]	86	80
Depreciation		89	84
Amortization		2	3
Deferred income taxes and investment tax credits		(2)	4
Change in current assets and current liabilities
Accounts receivable		2	6
Accounts receivable from affiliates		1	0
Accounts payable		(7)	(2)
Accounts payable to affiliates		2	(3)
Unbilled revenues		20	16
Fuel, materials and supplies		15	(3)
Regulatory assets and liabilities, net		0	(12)
Taxes payable		13	6
Accrued interest		25	25
Other		(17)	(4)
Other operating activities
Defined benefit plans - funding		0	(1)
Expenditures for asset retirement obligations		(9)	(11)
Other assets		0	3
Other liabilities		4	2
Net cash provided by operating activities		224	193
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(127)	(138)
Net (increase) decrease in notes receivable from affiliate		0	(21)
Net cash used in investing activities		(127)	(159)
Cash Flows from Financing Activities
Retirement of commercial paper		(32)	0
Payment of common stock dividends to parent		(56)	(37)
Net increase (decrease) in short-term debt		(23)	(6)
Contributions from parent		0	37
Net cash provided by (used in) financing activities		(111)	(6)
Cash and Cash Equivalents, Period Increase (Decrease)		(14)	28
Cash and Cash Equivalents at Beginning of Period		22	12
Cash and Cash Equivalents at End of Period		8	40
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at March 31,		$ 40	$ 39

[1] Net income equals comprehensive income.

[2] Net income approximates comprehensive income.

[3] Net income equals comprehensive income.

[4] Net income equals comprehensive income.