CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016
Cash Flows from Operating Activities
Net Income		$ 695	$ 964
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation		488	460
Amortization		45	37
Defined benefit plans - expense (income)		(45)	(24)
Deferred income taxes and investment tax credits		201	320
Unrealized (gains) losses on derivatives, and other hedging activities		135	(192)
Stock-based compensation expense		22	18
Other		(5)	(11)
Change in current assets and current liabilities
Accounts receivable		26	16
Accounts payable		(92)	(39)
Unbilled revenues		70	(2)
Fuel, materials and supplies		42	21
Prepayments		(66)	(66)
Counterparty collateral		8	76
Taxes payable		(27)	22
Accrued interest		(77)	(85)
Other current liabilities		(52)	(47)
Other		(14)	(21)
Other operating activities
Defined benefit plans - funding		(552)	(224)
Other assets		(1)	2
Other liabilities		(11)	(55)
Net cash provided by operating activities		790	1,170
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(1,373)	(1,346)
Expenditures for intangible assets		(15)	(14)
Other investing activities		6	13
Net cash used in investing activities		(1,382)	(1,347)
Cash Flows from Financing Activities
Issuance of long-term debt		594	1,020
Retirement of long-term debt		(60)	(684)
Settlement of cross-currency swaps		0	46
Issuance of common stock		177	76
Payment of common stock dividends		(529)	(513)
Net increase (decrease) in short-term debt		554	(66)
Other financing activities		(25)	(31)
Net cash provided by (used in) financing activities		711	(152)
Effect of Exchange Rates on Cash and Cash Equivalents		7	(15)
Net Increase (Decrease) in Cash and Cash Equivalents		126	(344)
Cash and Cash Equivalents at Beginning of Period		341	836
Cash and Cash Equivalents at End of Period		467	492
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at June 30,		284	283
Accrued expenditures for intangible assets at June 30,		56	94
PPL Electric Utilities Corp [Member]
Cash Flows from Operating Activities
Net Income	[1]	156	173
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation		151	121
Amortization		15	15
Defined benefit plans - expense (income)		7	7
Deferred income taxes and investment tax credits		84	107
Other		(4)	(10)
Change in current assets and current liabilities
Accounts receivable		13	(6)
Accounts payable		(59)	(26)
Unbilled revenues		17	3
Prepayments		(52)	3
Regulatory assets and liabilities		(12)	(40)
Taxes payable		(4)	(16)
Other		(6)	(6)
Other operating activities
Defined benefit plans - funding		(24)	0
Other assets		(4)	11
Other liabilities		1	(8)
Net cash provided by operating activities		279	328
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(550)	(424)
Expenditures for intangible assets		(5)	(2)
Net increase in notes receivable from affiliate		(270)	0
Other investing activities		1	(1)
Net cash used in investing activities		(824)	(427)
Cash Flows from Financing Activities
Issuance of long-term debt		470	224
Retirement of long-term debt		0	(224)
Contributions from parent		575	200
Payment of common stock dividends to parent		(154)	(117)
Net increase (decrease) in short-term debt		(295)	6
Other financing activities		(5)	(2)
Net cash provided by (used in) financing activities		591	87
Net Increase (Decrease) in Cash and Cash Equivalents		46	(12)
Cash and Cash Equivalents at Beginning of Period		13	47
Cash and Cash Equivalents at End of Period		59	35
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at June 30,		157	130
LG And E And KU Energy LLC [Member]
Cash Flows from Operating Activities
Net Income		190	204
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation		210	199
Amortization		14	15
Defined benefit plans - expense (income)		12	13
Deferred income taxes and investment tax credits		91	121
Other		0	(1)
Change in current assets and current liabilities
Accounts receivable		13	9
Accounts payable		(28)	28
Unbilled revenues		23	(14)
Fuel, materials and supplies		41	20
Taxes payable		3	(13)
Other		(21)	(23)
Other operating activities
Defined benefit plans - funding		(29)	(45)
Expenditures for asset retirement obligations		(12)	(8)
Other assets		(2)	1
Other liabilities		6	0
Net cash provided by operating activities		511	506
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(355)	(439)
Net cash used in investing activities		(355)	(439)
Cash Flows from Financing Activities
Net increase (decrease) in notes payable with affiliate		(4)	123
Issuance of long-term debt		60	0
Retirement of long-term debt		(60)	0
Debt issuance and credit facility costs		(1)	(1)
Net increase (decrease) in short-term debt		73	(126)
Distributions to member		(218)	(114)
Contributions from member		0	37
Net cash provided by (used in) financing activities		(150)	(81)
Net Increase (Decrease) in Cash and Cash Equivalents		6	(14)
Cash and Cash Equivalents at Beginning of Period		13	30
Cash and Cash Equivalents at End of Period		19	16
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at June 30,		83	105
Louisville Gas And Electric Co [Member]
Cash Flows from Operating Activities
Net Income	[1]	96	96
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation		89	83
Amortization		7	6
Defined benefit plans - expense (income)		3	4
Deferred income taxes and investment tax credits		57	62
Change in current assets and current liabilities
Accounts receivable		9	2
Accounts receivable from affiliates		11	(7)
Accounts payable		(17)	20
Accounts payable to affiliates		(3)	8
Unbilled revenues		14	(1)
Fuel, materials and supplies		33	29
Taxes payable		(23)	0
Other		(3)	(6)
Other operating activities
Defined benefit plans - funding		(3)	(16)
Expenditures for asset retirement obligations		(7)	(6)
Other assets		0	(4)
Other liabilities		1	3
Net cash provided by operating activities		264	273
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(177)	(237)
Net cash used in investing activities		(177)	(237)
Cash Flows from Financing Activities
Issuance of long-term debt		60	0
Retirement of long-term debt		(60)	0
Contributions from parent		0	47
Debt issuance and credit facility costs		(1)	(1)
Payment of common stock dividends to parent		(122)	(61)
Net increase (decrease) in short-term debt		38	(32)
Net cash provided by (used in) financing activities		(85)	(47)
Net Increase (Decrease) in Cash and Cash Equivalents		2	(11)
Cash and Cash Equivalents at Beginning of Period		5	19
Cash and Cash Equivalents at End of Period		7	8
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at June 30,		40	69
Kentucky Utilities Co [Member]
Cash Flows from Operating Activities
Net Income	[2]	119	129
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation		121	116
Amortization		6	7
Defined benefit plans - expense (income)		2	3
Deferred income taxes and investment tax credits		70	77
Other		0	(1)
Change in current assets and current liabilities
Accounts receivable		5	11
Accounts receivable from affiliates		0	1
Accounts payable		(1)	11
Accounts payable to affiliates		(15)	12
Unbilled revenues		9	(13)
Fuel, materials and supplies		8	(9)
Taxes payable		(29)	(3)
Other		(13)	(11)
Other operating activities
Defined benefit plans - funding		(21)	(13)
Expenditures for asset retirement obligations		(5)	(2)
Other assets		(3)	(3)
Other liabilities		4	(1)
Net cash provided by operating activities		257	311
Cash Flows from Investing Activities
Expenditures for property, plant and equipment		(177)	(201)
Net cash used in investing activities		(177)	(201)
Cash Flows from Financing Activities
Contributions from parent		0	20
Debt issuance and credit facility costs		0	(1)
Payment of common stock dividends to parent		(110)	(113)
Net increase (decrease) in short-term debt		35	(19)
Net cash provided by (used in) financing activities		(75)	(113)
Net Increase (Decrease) in Cash and Cash Equivalents		5	(3)
Cash and Cash Equivalents at Beginning of Period		7	11
Cash and Cash Equivalents at End of Period		12	8
Supplemental Disclosures of Cash Flow Information
Accrued expenditures for property, plant and equipment at June 30,		$ 43	$ 36

[1] Net income equals comprehensive income.

[2] Net income approximates comprehensive income.