CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019
Cash Flows from Operating Activities
Net Income		$ 1,179	$ 1,382
Depreciation		959	890
Amortization		47	60
Defined benefit plans - (income) expense		(155)	(198)
Deferred income taxes and investment tax credits		355	257
Unrealized (gains) losses on derivatives, and other hedging activities		98	(18)
Stock-based compensation expense		17	24
Other		(6)	(15)
Change in current assets and current liabilities
Accounts receivable		(40)	57
Accounts payable		(35)	(116)
Unbilled revenues		126	58
Fuel, materials and supplies		(8)	9
Prepayments		(53)	(53)
Regulatory assets and liabilities, net		(44)	(62)
Accrued interest		86	74
Other current liabilities		(29)	(94)
Other		20	(6)
Other operating activities
Defined benefit plans - funding		264	281
Other assets		(7)	(24)
Other liabilities		1	(56)
Net cash provided by operating activities		2,247	1,888
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(2,348)	(2,197)
Purchase of investments		0	(55)
Proceeds from the sale of investments		2	63
Other investing activities		(12)	(5)
Net cash used in investing activities		(2,358)	(2,194)
Cash Flows from Financing Activities
Issuance of long-term debt		1,598	1,465
Retirement of long-term debt		(975)	(200)
Proceeds from project financing		152	0
Issuance of common stock		32	49
Payment of common stock dividends		(956)	(893)
Issuance of term loan		300	0
Net increase (decrease) in short-term debt		(94)	(34)
Other financing activities		(24)	(24)
Net cash provided by (used in) financing activities		33	363
Effect of Exchange Rates on Cash, Cash Equivalents and Restricted Cash		11	(10)
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash		(67)	47
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		746
Cash, Cash Equivalents and Restricted Cash at End of Period		769	690
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at September 30,		279	363
Accrued expenditures for intangible assets at September 30,		86	67
PPL Electric Utilities Corp [Member]
Cash Flows from Operating Activities
Net Income	[1]	370	333
Depreciation		301	290
Amortization		21	18
Defined benefit plans - (income) expense		(1)	0
Deferred income taxes and investment tax credits		68	70
Other		0	(14)
Change in current assets and current liabilities
Accounts receivable		(35)	34
Accounts payable		(7)	(46)
Unbilled revenues		54	28
Fuel, materials and supplies		(23)	(7)
Prepayments		(30)	(36)
Regulatory assets and liabilities, net		(31)	(42)
Taxes payable		4	(4)
Other		(3)	(13)
Other operating activities
Defined benefit plans - funding		21	21
Other assets		(20)	11
Other liabilities		9	8
Net cash provided by operating activities		656	609
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(840)	(815)
Expenditures for intangible assets		(5)	(4)
Other investing activities		1	4
Net cash used in investing activities		(844)	(1,361)
Cash Flows from Financing Activities
Issuance of long-term debt		0	393
Payment of common stock dividends to parent		(323)	(276)
Net increase (decrease) in short-term debt		280	0
Contributions from parent		740	400
Return of capital to parent		(745)	0
Other financing activities		0	(5)
Net cash provided by (used in) financing activities		(48)	512
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash		(236)	(240)
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		26
Cash, Cash Equivalents and Restricted Cash at End of Period		28	29
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at September 30,		150	168
LG And E And KU Energy LLC [Member]
Cash Flows from Operating Activities
Net Income	[2]	355	388
Depreciation		452	402
Amortization		14	20
Defined benefit plans - (income) expense		11	9
Deferred income taxes and investment tax credits		58	78
Other		(1)	(2)
Change in current assets and current liabilities
Accounts receivable		(8)	13
Accounts payable		(20)	(34)
Accounts payable to affiliates		7	6
Unbilled revenues		37	5
Fuel, materials and supplies		21	16
Regulatory assets and liabilities, net		(15)	(19)
Taxes payable		0	(7)
Accrued interest		42	57
Other		(32)	(31)
Other operating activities
Defined benefit plans - funding		28	34
Expenditures for asset retirement obligations		(59)	(67)
Other assets		(2)	(4)
Other liabilities		40	17
Net cash provided by operating activities		872	813
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(710)	(761)
Other investing activities		3	0
Net cash used in investing activities		(707)	(761)
Cash Flows from Financing Activities
Issuance of long-term debt		498	705
Retirement of long-term debt		(975)	(200)
Acquisition of outstanding bonds		0	40
Remarketing of reacquired bonds		0	40
Net increase in notes payable with affiliate		3	16
Issuance of long-term debt with affiliate		550	0
Distributions to member		(194)	(206)
Contributions from member		0	63
Net increase (decrease) in short-term debt		(43)	(413)
Other financing activities		(6)	(11)
Net cash provided by (used in) financing activities		(167)	(46)
Cash and Cash Equivalents, Period Increase (Decrease)		(2)	6
Cash and Cash Equivalents at Beginning of Period		27	24
Cash and Cash Equivalents at End of Period		25	30
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at September 30,		78	107
Louisville Gas And Electric Co [Member]
Cash Flows from Operating Activities
Net Income	[3]	191	188
Depreciation		193	168
Amortization		6	13
Defined benefit plans - (income) expense		2	0
Deferred income taxes and investment tax credits		1	45
Other		0	2
Change in current assets and current liabilities
Accounts receivable		6	13
Accounts receivable from affiliates		7	9
Accounts payable		(23)	(10)
Accounts payable to affiliates		(8)	(5)
Unbilled revenues		22	4
Fuel, materials and supplies		9	7
Regulatory assets and liabilities, net		5	(5)
Taxes payable		(1)	0
Accrued interest		18	22
Other		(13)	(15)
Other operating activities
Defined benefit plans - funding		6	6
Expenditures for asset retirement obligations		(12)	(22)
Other assets		(1)	(1)
Other liabilities		23	10
Net cash provided by operating activities		419	417
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(329)	(323)
Net cash used in investing activities		(329)	(323)
Cash Flows from Financing Activities
Issuance of long-term debt		0	399
Retirement of long-term debt		0	(200)
Acquisition of outstanding bonds		0	40
Remarketing of reacquired bonds		0	40
Payment of common stock dividends to parent		(115)	(130)
Net increase (decrease) in short-term debt		(32)	(180)
Contributions from parent		53	25
Other financing activities		(1)	(6)
Net cash provided by (used in) financing activities		(95)	(92)
Cash and Cash Equivalents, Period Increase (Decrease)		(5)	2
Cash and Cash Equivalents at Beginning of Period		15	10
Cash and Cash Equivalents at End of Period		10	12
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at September 30,		43	53
Kentucky Utilities Co [Member]
Cash Flows from Operating Activities
Net Income	[4]	217	237
Depreciation		258	233
Amortization		6	7
Deferred income taxes and investment tax credits		20	44
Other		(1)	(3)
Change in current assets and current liabilities
Accounts receivable		(22)	0
Accounts payable		7	(16)
Accounts payable to affiliates		(18)	(14)
Unbilled revenues		15	1
Fuel, materials and supplies		12	9
Regulatory assets and liabilities, net		(20)	(14)
Taxes payable		1	5
Accrued interest		23	28
Other		(15)	(6)
Other operating activities
Defined benefit plans - funding		1	3
Expenditures for asset retirement obligations		(47)	(45)
Other assets		0	(2)
Other liabilities		11	10
Net cash provided by operating activities		446	471
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(381)	(436)
Other investing activities		3	0
Net cash used in investing activities		(378)	(436)
Cash Flows from Financing Activities
Issuance of long-term debt		498	306
Retirement of long-term debt		(500)	0
Payment of common stock dividends to parent		(145)	(167)
Net increase (decrease) in short-term debt		(11)	(233)
Contributions from parent		98	68
Other financing activities		(5)	(5)
Net cash provided by (used in) financing activities		(65)	(31)
Cash and Cash Equivalents, Period Increase (Decrease)		3	4
Cash and Cash Equivalents at Beginning of Period		12	14
Cash and Cash Equivalents at End of Period		15	18
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at September 30,		$ 35	$ 54

[1] Net income equals comprehensive income.

[2] Net income approximates comprehensive income.

[3] Net income equals comprehensive income.

[4] Net income equals comprehensive income.