CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Cash Flows from Operating Activities
Net Income		$ 554	$ 466
Depreciation		317	284
Amortization		12	22
Defined benefit plans - (income) expense		(52)	(66)
Deferred income taxes and investment tax credits		106	89
Unrealized (gains) losses on derivatives, and other hedging activities		(57)	53
Stock-based compensation expense		6	14
Other		17	(3)
Change in current assets and current liabilities
Accounts receivable		(35)	(57)
Accounts payable		(63)	(94)
Unbilled revenues		68	48
Fuel, materials and supplies		13	31
Prepayments		(76)	(86)
Regulatory assets and liabilities, net		(25)	(25)
Accrued interest		59	48
Other current liabilities		(95)	(72)
Other		24	(21)
Other operating activities
Defined benefit plans - funding		(125)	(127)
Other assets		42	(20)
Other liabilities		2	(10)
Net cash provided by operating activities		692	474
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(826)	(729)
Purchase of investments		0	(55)
Proceeds from the sale of investments		0	57
Other investing activities		(7)	5
Net cash used in investing activities		(833)	(722)
Cash Flows from Financing Activities
Issuance of common stock		20	22
Payment of common stock dividends		(317)	(296)
Issuance of term loan		200	0
Net increase (decrease) in short-term debt		345	424
Other financing activities		(8)	(8)
Net cash provided by (used in) financing activities		240	142
Effect of Exchange Rates on Cash, Cash Equivalents and Restricted Cash		1	3
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash		100	(103)
Cash and Cash Equivalents at Beginning of Period		815
Cash and Cash Equivalents at End of Period		915
Cash, Cash Equivalents and Restricted Cash at Beginning of Period		836	643
Cash, Cash Equivalents and Restricted Cash at End of Period		936	540
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at March 31,		282	322
Accrued expenditures for intangible assets at March 31,		87	64
PPL Electric Utilities Corp [Member]
Cash Flows from Operating Activities
Net Income	[1]	118	121
Depreciation		98	95
Amortization		5	5
Deferred income taxes and investment tax credits		32	16
Other		8	(2)
Change in current assets and current liabilities
Accounts receivable		(26)	(25)
Accounts payable		(20)	(5)
Unbilled revenues		34	13
Prepayments		(76)	(88)
Regulatory assets and liabilities, net		(11)	(15)
Taxes payable		(2)	(2)
Other		(19)	(12)
Other operating activities
Defined benefit plans - funding		(21)	(21)
Other assets		4	2
Other liabilities		8	(1)
Net cash provided by operating activities		132	81
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(280)	(264)
Expenditures for intangible assets		(1)	0
Net cash used in investing activities		(281)	(264)
Cash Flows from Financing Activities
Payment of common stock dividends to parent		(165)	(120)
Net increase (decrease) in short-term debt		85	60
Other financing activities		0	(1)
Net cash provided by (used in) financing activities		(80)	(61)
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash		(229)	(244)
Cash and Cash Equivalents at Beginning of Period		262
Cash and Cash Equivalents at End of Period		33
Cash, Cash Equivalents and Restricted Cash at Beginning of Period		264	269
Cash, Cash Equivalents and Restricted Cash at End of Period		35	25
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at March 31,		158	142
LG And E And KU Energy LLC [Member]
Cash Flows from Operating Activities
Net Income	[2]	135	124
Depreciation		149	123
Amortization		4	10
Defined benefit plans - (income) expense		5	3
Deferred income taxes and investment tax credits		31	36
Other		0	(1)
Change in current assets and current liabilities
Accounts receivable		20	8
Accounts payable		(18)	(33)
Accounts payable to affiliates		1	7
Unbilled revenues		27	21
Fuel, materials and supplies		24	29
Regulatory assets and liabilities, net		(14)	(10)
Taxes payable		(27)	(29)
Accrued interest		51	42
Other		(37)	(15)
Other operating activities
Defined benefit plans - funding		(23)	(21)
Expenditures for asset retirement obligations		(15)	(21)
Other assets		1	(2)
Other liabilities		6	(1)
Net cash provided by operating activities		320	270
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(255)	(278)
Net cash used in investing activities		(255)	(278)
Cash Flows from Financing Activities
Net increase (decrease) in notes payable with affiliate		92	74
Distributions to member		(52)	(56)
Net increase (decrease) in short-term debt		(85)	(12)
Net cash provided by (used in) financing activities		(45)	6
Cash and Cash Equivalents, Period Increase (Decrease)		20	(2)
Cash and Cash Equivalents at Beginning of Period		27	24
Cash and Cash Equivalents at End of Period		47	22
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at March 31,		78	88
Louisville Gas And Electric Co [Member]
Cash Flows from Operating Activities
Net Income	[3]	73	64
Depreciation		64	51
Amortization		2	7
Defined benefit plans - (income) expense		1	0
Deferred income taxes and investment tax credits		1	13
Change in current assets and current liabilities
Accounts receivable		14	3
Accounts receivable from affiliates		(6)	(4)
Accounts payable		(12)	(7)
Accounts payable to affiliates		(4)	(3)
Unbilled revenues		11	13
Fuel, materials and supplies		27	32
Regulatory assets and liabilities, net		(2)	(8)
Taxes payable		2	(12)
Accrued interest		18	13
Other		(10)	(1)
Other operating activities
Defined benefit plans - funding		(4)	0
Expenditures for asset retirement obligations		(4)	(4)
Other assets		(1)	0
Other liabilities		1	0
Net cash provided by operating activities		171	157
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(117)	(117)
Net cash used in investing activities		(117)	(117)
Cash Flows from Financing Activities
Net increase (decrease) in notes payable with affiliate		21	0
Payment of common stock dividends to parent		(29)	(30)
Net increase (decrease) in short-term debt		(79)	(10)
Contributions from parent		25	0
Other financing activities		0	(1)
Net cash provided by (used in) financing activities		(62)	(41)
Cash and Cash Equivalents, Period Increase (Decrease)		(8)	(1)
Cash and Cash Equivalents at Beginning of Period		15	10
Cash and Cash Equivalents at End of Period		7	9
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at March 31,		39	37
Kentucky Utilities Co [Member]
Cash Flows from Operating Activities
Net Income	[4]	80	81
Depreciation		84	72
Amortization		3	3
Deferred income taxes and investment tax credits		4	15
Other		0	(1)
Change in current assets and current liabilities
Accounts receivable		6	7
Accounts payable		(2)	(16)
Accounts payable to affiliates		(3)	(1)
Unbilled revenues		16	8
Fuel, materials and supplies		(3)	(3)
Regulatory assets and liabilities, net		(12)	(2)
Taxes payable		6	(3)
Accrued interest		25	22
Other		(4)	9
Other operating activities
Defined benefit plans - funding		(1)	0
Expenditures for asset retirement obligations		(11)	(17)
Other assets		3	(2)
Other liabilities		2	2
Net cash provided by operating activities		193	174
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(138)	(161)
Net (increase) decrease in notes receivable from affiliate		21	0
Net cash used in investing activities		(159)	(161)
Cash Flows from Financing Activities
Payment of common stock dividends to parent		(37)	(39)
Net increase (decrease) in short-term debt		(6)	(2)
Contributions from parent		37	28
Other financing activities		0	(1)
Net cash provided by (used in) financing activities		(6)	(14)
Cash and Cash Equivalents, Period Increase (Decrease)		28	(1)
Cash and Cash Equivalents at Beginning of Period		12	14
Cash and Cash Equivalents at End of Period		40	13
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at March 31,		$ 39	$ 51

[1] Net income equals comprehensive income.

[2] Net income approximates comprehensive income.

[3] Net income equals comprehensive income.

[4] Net income equals comprehensive income.