CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions		Sep. 30, 2019	Dec. 31, 2018
Assets, Current [Abstract]
Cash and cash equivalents		$ 670	$ 621
Accounts receivable (less reserve:)
Customer		625	663
Other		112	107
Unbilled revenues		430	496
Fuel, materials and supplies		295	303
Prepayments		115	70
Price risk management assets		209	109
Regulatory assets		49	36
Other current assets		78	63
Total Current Assets		2,534	2,432
Property, Plant and Equipment
Regulated utility plant		40,734	39,734
Less: accumulated depreciation - regulated utility plant		7,732	7,310
Regulated utility plant, net		33,002	32,424
Non-regulated property, plant and equipment		331	355
Less: accumulated depreciation - non-regulated property, plant and equipment		105	101
Non-regulated property, plant and equipment, net		226	254
Construction work in progress		1,880	1,780
Property, Plant and Equipment, net		35,108	34,458
Other Noncurrent Assets
Regulatory assets		1,658	1,673
Goodwill		3,050	3,162
Other intangibles		709	716
Pension benefit asset		955	535
Price risk management assets		210	228
Other noncurrent assets		335	192
Total Other Noncurrent Assets		6,917	6,506
Total Assets		44,559	43,396
Current Liabilities
Short-term debt		1,387	1,430
Long-term debt due within one year		0	530
Accounts payable		846	989
Taxes		94	110
Interest		346	278
Dividends		298	296
Customer deposits		262	257
Regulatory liabilities		79	122
Other current liabilities		528	551
Total Current Liabilities		3,840	4,563
Long-term Debt
Long-term Debt		21,547	20,069
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		3,076	2,796
Investment tax credits		124	126
Accrued pension obligations		719	771
Asset retirement obligations		193	264
Regulatory liabilities		2,675	2,714
Other deferred credits and noncurrent liabilities		483	436
Total Deferred Credits and Other Noncurrent Liabilities		7,270	7,107
Commitments and Contingent Liabilities
Equity
Common stock	[1]	7	7
Additional paid-in capital		11,087	11,021
Earnings reinvested		5,080	4,593
Accumulated other comprehensive loss		(4,272)	(3,964)
Total Equity		11,902	11,657
Total Liabilities and Equity		44,559	43,396
PPL Electric Utilities Corp [Member]
Assets, Current [Abstract]
Cash and cash equivalents		27	267
Accounts receivable (less reserve:)
Customer		253	264
Other		26	38
Accounts receivable from affiliates		11	11
Notes receivable from affiliate		546	0
Unbilled revenues		92	120
Fuel, materials and supplies		32	25
Prepayments		34	5
Regulatory assets		22	11
Other current assets		10	9
Total Current Assets		1,053	750
Property, Plant and Equipment
Regulated utility plant		12,261	11,637
Less: accumulated depreciation - regulated utility plant		3,031	2,856
Regulated utility plant, net		9,230	8,781
Construction work in progress		669	586
Property, Plant and Equipment, net		9,899	9,367
Other Noncurrent Assets
Regulatory assets		807	824
Other intangibles		262	260
Other noncurrent assets		50	42
Total Other Noncurrent Assets		1,119	1,126
Total Assets		12,071	11,243
Current Liabilities
Accounts payable		379	418
Accounts payable to affiliates		28	25
Taxes		8	12
Interest		43	37
Regulatory liabilities		48	74
Other current liabilities		86	101
Total Current Liabilities		592	667
Long-term Debt
Long-term Debt		4,085	3,694
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		1,414	1,320
Accrued pension obligations		254	282
Regulatory liabilities		654	675
Other deferred credits and noncurrent liabilities		154	144
Total Deferred Credits and Other Noncurrent Liabilities		2,476	2,421
Commitments and Contingent Liabilities
Equity
Common stock	[2]	364	364
Additional paid-in capital		3,558	3,158
Earnings reinvested		996	939
Total Equity		4,918	4,461
Total Liabilities and Equity		12,071	11,243
LG And E And KU Energy LLC [Member]
Assets, Current [Abstract]
Cash and cash equivalents		30	24
Accounts receivable (less reserve:)
Customer		233	239
Other		72	63
Unbilled revenues		164	169
Fuel, materials and supplies		233	248
Prepayments		31	25
Regulatory assets		27	25
Total Current Assets		790	793
Property, Plant and Equipment
Regulated utility plant		14,175	13,721
Less: accumulated depreciation - regulated utility plant		2,294	2,125
Regulated utility plant, net		11,881	11,596
Construction work in progress		1,033	1,018
Property, Plant and Equipment, net		12,914	12,614
Other Noncurrent Assets
Regulatory assets		851	849
Goodwill		996	996
Other intangibles		72	78
Other noncurrent assets		145	82
Total Other Noncurrent Assets		2,064	2,005
Total Assets		15,768	15,412
Current Liabilities
Short-term debt		101	514
Long-term debt due within one year		0	530
Notes payable with affiliates		129	113
Accounts payable		304	366
Accounts payable to affiliates		15	9
Taxes		56	63
Price risk management liabilities		5	4
Interest		89	32
Customer deposits		62	61
Regulatory liabilities		31	48
Asset retirement obligations		92	82
Other current liabilities		131	126
Total Current Liabilities		1,015	1,948
Long-term Debt
Long-term debt		5,351	4,322
Long-term debt to affiliate		650	650
Long-term Debt		6,001	4,972
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		1,060	956
Investment tax credits		124	126
Accrued pension obligations		262	282
Asset retirement obligations		147	214
Regulatory liabilities		2,021	2,039
Price risk management liabilities		20	16
Other deferred credits and noncurrent liabilities		152	136
Total Deferred Credits and Other Noncurrent Liabilities		3,786	3,769
Commitments and Contingent Liabilities
Equity
Member's Equity		4,966	4,723
Total Liabilities and Equity		15,768	15,412
Louisville Gas And Electric Co [Member]
Assets, Current [Abstract]
Cash and cash equivalents		12	10
Accounts receivable (less reserve:)
Customer		102	110
Other		42	30
Accounts receivable from affiliates		15	24
Unbilled revenues		73	77
Fuel, materials and supplies		120	127
Prepayments		15	12
Regulatory assets		21	21
Total Current Assets		400	411
Property, Plant and Equipment
Regulated utility plant		6,052	5,816
Less: accumulated depreciation - regulated utility plant		823	741
Regulated utility plant, net		5,229	5,075
Construction work in progress		497	514
Property, Plant and Equipment, net		5,726	5,589
Other Noncurrent Assets
Regulatory assets		425	431
Goodwill		389	389
Other intangibles		43	47
Other noncurrent assets		44	16
Total Other Noncurrent Assets		901	883
Total Assets		7,027	6,883
Current Liabilities
Short-term debt		99	279
Long-term debt due within one year		0	434
Accounts payable		169	172
Accounts payable to affiliates		21	26
Taxes		29	26
Price risk management liabilities		5	4
Interest		33	11
Customer deposits		30	29
Regulatory liabilities		12	17
Asset retirement obligations		29	23
Other current liabilities		39	39
Total Current Liabilities		466	1,060
Long-term Debt
Long-term Debt		2,004	1,375
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		683	628
Investment tax credits		34	34
Asset retirement obligations		54	80
Regulatory liabilities		903	915
Price risk management liabilities		20	16
Other deferred credits and noncurrent liabilities		93	88
Total Deferred Credits and Other Noncurrent Liabilities		1,787	1,761
Commitments and Contingent Liabilities
Equity
Common stock	[3]	424	424
Additional paid-in capital		1,820	1,795
Earnings reinvested		526	468
Total Equity		2,770	2,687
Total Liabilities and Equity		7,027	6,883
Kentucky Utilities Co [Member]
Assets, Current [Abstract]
Cash and cash equivalents		18	14
Accounts receivable (less reserve:)
Customer		131	129
Other		27	34
Unbilled revenues		91	92
Fuel, materials and supplies		113	121
Prepayments		16	11
Regulatory assets		6	4
Total Current Assets		402	405
Property, Plant and Equipment
Regulated utility plant		8,111	7,895
Less: accumulated depreciation - regulated utility plant		1,468	1,382
Regulated utility plant, net		6,643	6,513
Construction work in progress		535	503
Property, Plant and Equipment, net		7,178	7,016
Other Noncurrent Assets
Regulatory assets		426	418
Goodwill		607	607
Other intangibles		29	31
Other noncurrent assets		100	63
Total Other Noncurrent Assets		1,162	1,119
Total Assets		8,742	8,540
Current Liabilities
Short-term debt		2	235
Long-term debt due within one year		0	96
Accounts payable		120	171
Accounts payable to affiliates		40	53
Taxes		29	24
Interest		44	16
Customer deposits		32	32
Regulatory liabilities		19	31
Asset retirement obligations		63	59
Other current liabilities		47	35
Total Current Liabilities		396	752
Long-term Debt
Long-term Debt		2,623	2,225
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		795	735
Investment tax credits		90	92
Asset retirement obligations		93	134
Regulatory liabilities		1,118	1,124
Other deferred credits and noncurrent liabilities		47	36
Total Deferred Credits and Other Noncurrent Liabilities		2,143	2,121
Commitments and Contingent Liabilities
Equity
Common stock	[4]	308	308
Additional paid-in capital		2,729	2,661
Earnings reinvested		543	473
Total Equity		3,580	3,442
Total Liabilities and Equity		$ 8,742	$ 8,540

[1] 1,560,000 shares authorized; 722,307 and 720,323 shares issued and outstanding at September 30, 2019 and December 31, 2018.

[2] 170,000 shares authorized; 66,368 shares issued and outstanding at September 30, 2019 and December 31, 2018.

[3] 75,000 shares authorized; 21,294 shares issued and outstanding at September 30, 2019 and December 31, 2018.

[4] 80,000 shares authorized; 37,818 shares issued and outstanding at September 30, 2019 and December 31, 2018.