CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Cash Flows from Operating Activities
Net Income		$ 466	$ 452
Depreciation		284	269
Amortization		22	21
Defined benefit plans - (income) expense		(66)	(50)
Deferred income taxes and investment tax credits		89	59
Unrealized losses on derivatives, and other hedging activities		53	85
Stock-based compensation expense		14	15
Other		(3)	(3)
Change in current assets and current liabilities
Accounts receivable		(57)	(71)
Accounts payable		(94)	(36)
Unbilled revenues		48	58
Fuel, materials and supplies		31	43
Prepayments		(86)	(73)
Regulatory assets and liabilities, net		(25)	64
Accrued interest		48	39
Other current liabilities		(72)	(120)
Other		(21)	6
Other operating activities
Defined benefit plans - funding		(127)	(150)
Other assets		(20)	(30)
Other liabilities		(10)	(12)
Net cash provided by operating activities		474	566
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(729)	(750)
Purchase of investments		(55)	0
Proceeds from the sale of investments		57	0
Other investing activities		5	(3)
Net cash used in investing activities		(722)	(753)
Cash Flows from Financing Activities
Issuance of long-term debt		0	144
Issuance of common stock		22	100
Payment of common stock dividends		(296)	(273)
Net increase (decrease) in short-term debt		424	369
Other financing activities		(8)	(9)
Net cash provided by (used in) financing activities		142	331
Effect of Exchange Rate on Cash, Cash Equivalents and Restricted Cash		3	(2)
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash		(103)	142
Cash and Cash Equivalents at Beginning of Period		621
Cash and Cash Equivalents at End of Period		518
Cash, Cash Equivalents and Restricted Cash at Beginning of Period		643	511
Cash, Cash Equivalents and Restricted Cash at End of Period		540	653
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at March 31,		322	313
Accrued expenditures for intangible assets at March 31,		64	65
PPL Electric Utilities Corp [Member]
Cash Flows from Operating Activities
Net Income	[1]	121	148
Depreciation		95	85
Amortization		5	6
Defined benefit plans - (income) expense		0	2
Deferred income taxes and investment tax credits		16	21
Other		(2)	(5)
Change in current assets and current liabilities
Accounts receivable		(25)	(30)
Accounts payable		(5)	(36)
Unbilled revenues		13	16
Prepayments		(88)	(69)
Regulatory assets and liabilities, net		(15)	5
Taxes payable		(2)	4
Other		(12)	(19)
Other operating activities
Defined benefit plans - funding		(21)	(28)
Other assets		2	(25)
Other liabilities		(1)	1
Net cash provided by operating activities		81	76
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(264)	(245)
Expenditures for intangible assets		0	1
Net cash used in investing activities		(264)	(246)
Cash Flows from Financing Activities
Payment of common stock dividends to parent		(120)	(72)
Net increase (decrease) in short-term debt		60	213
Other financing activities		(1)	0
Net cash provided by (used in) financing activities		(61)	141
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash		(244)	(29)
Cash and Cash Equivalents at Beginning of Period		267
Cash and Cash Equivalents at End of Period		23
Cash, Cash Equivalents and Restricted Cash at Beginning of Period		269	51
Cash, Cash Equivalents and Restricted Cash at End of Period		25	22
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at March 31,		142	147
LG And E And KU Energy LLC [Member]
Cash Flows from Operating Activities
Net Income	[2]	124	142
Depreciation		123	117
Amortization		10	5
Defined benefit plans - (income) expense		3	3
Deferred income taxes and investment tax credits		36	8
Other		(1)	0
Change in current assets and current liabilities
Accounts receivable		8	(5)
Accounts payable		(33)	10
Accounts payable to affiliates		7	2
Unbilled revenues		21	31
Fuel, materials and supplies		29	42
Regulatory assets and liabilities, net		(10)	60
Taxes payable		(29)	7
Accrued interest		42	42
Other		(15)	(67)
Other operating activities
Defined benefit plans - funding		(21)	(108)
Expenditures for asset retirement obligations		(21)	(9)
Other assets		(2)	(3)
Other liabilities		(1)	1
Net cash provided by operating activities		270	278
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(278)	(294)
Net cash used in investing activities		(278)	(294)
Cash Flows from Financing Activities
Net increase (decrease) in notes payable with affiliate		74	12
Issuance of long-term debt		0	100
Distributions to member		(56)	(69)
Net increase (decrease) in short-term debt		(12)	(29)
Other financing activities		0	(1)
Net cash provided by (used in) financing activities		6	13
Cash and Cash Equivalents, Period Increase (Decrease)		(2)	(3)
Cash and Cash Equivalents at Beginning of Period		24	30
Cash and Cash Equivalents at End of Period		22	27
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at March 31,		88	124
Louisville Gas And Electric Co [Member]
Cash Flows from Operating Activities
Net Income	[3]	64	72
Depreciation		51	48
Amortization		7	4
Defined benefit plans - (income) expense		0	1
Deferred income taxes and investment tax credits		13	7
Change in current assets and current liabilities
Accounts receivable		3	2
Accounts receivable from affiliates		(4)	(7)
Accounts payable		(7)	8
Accounts payable to affiliates		(3)	(2)
Unbilled revenues		13	16
Fuel, materials and supplies		32	36
Regulatory assets and liabilities, net		(8)	28
Taxes payable		(12)	(1)
Accrued interest		13	13
Other		(1)	(16)
Other operating activities
Defined benefit plans - funding		0	(55)
Expenditures for asset retirement obligations		(4)	(5)
Other liabilities		0	(3)
Net cash provided by operating activities		157	146
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(117)	(150)
Net cash used in investing activities		(117)	(150)
Cash Flows from Financing Activities
Issuance of long-term debt		0	100
Payment of common stock dividends to parent		(30)	(34)
Net increase (decrease) in short-term debt		(10)	(62)
Other financing activities		(1)	(1)
Net cash provided by (used in) financing activities		(41)	3
Cash and Cash Equivalents, Period Increase (Decrease)		(1)	(1)
Cash and Cash Equivalents at Beginning of Period		10	15
Cash and Cash Equivalents at End of Period		9	14
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at March 31,		37	75
Kentucky Utilities Co [Member]
Cash Flows from Operating Activities
Net Income		81	87
Depreciation		72	68
Amortization		3	1
Deferred income taxes and investment tax credits		15	1
Other		(1)	0
Change in current assets and current liabilities
Accounts receivable		7	(7)
Accounts payable		(16)	11
Accounts payable to affiliates		(1)	0
Unbilled revenues		8	15
Fuel, materials and supplies		(3)	6
Regulatory assets and liabilities, net		(2)	32
Taxes payable		(3)	14
Accrued interest		22	22
Other		9	(15)
Other operating activities
Defined benefit plans - funding		0	(47)
Expenditures for asset retirement obligations		(17)	(4)
Other assets		(2)	(3)
Other liabilities		2	4
Net cash provided by operating activities		174	185
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(161)	(143)
Net cash used in investing activities		(161)	(143)
Cash Flows from Financing Activities
Payment of common stock dividends to parent		(39)	(79)
Net increase (decrease) in short-term debt		(2)	33
Contributions from parent		28	0
Other financing activities		(1)	0
Net cash provided by (used in) financing activities		(14)	(46)
Cash and Cash Equivalents, Period Increase (Decrease)		(1)	(4)
Cash and Cash Equivalents at Beginning of Period		14	15
Cash and Cash Equivalents at End of Period		13	11
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at March 31,		$ 51	$ 48

[1] Net income equals comprehensive income.

[2] Net income approximates comprehensive income.

[3] Net income equals comprehensive income.