CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions		Jun. 30, 2020	Dec. 31, 2019
Assets, Current [Abstract]
Cash and cash equivalents		$ 1,278	$ 815
Accounts receivable (less reserve:)
Customer		665	687
Other		106	105
Unbilled revenues		388	504
Fuel, materials and supplies		333	332
Prepayments		153	79
Price risk management assets		234	147
Regulatory assets		82	67
Other current assets		111	98
Total Current Assets		3,268	2,767
Property, Plant and Equipment
Regulated utility plant		43,226	42,709
Less:  accumulated depreciation - regulated utility plant		8,261	8,055
Regulated utility plant, net		34,965	34,654
Non-regulated property, plant and equipment		452	357
Less:  accumulated depreciation - non-regulated property, plant and equipment		88	109
Non-regulated property, plant and equipment, net		364	248
Construction work in progress		1,456	1,580
Property, Plant and Equipment, net		36,785	36,482
Other Noncurrent Assets
Regulatory assets		1,472	1,492
Goodwill		3,086	3,198
Other intangibles		730	742
Pension benefit asset		740	464
Price risk management assets		75	149
Other noncurrent assets		364	386
Total Other Noncurrent Assets		6,467	6,431
Total Assets		46,520	45,680
Current Liabilities
Short-term debt		828	1,151
Long-term debt due within one year		2,058	1,172
Accounts payable		804	956
Taxes		76	99
Interest		232	294
Dividends		319	317
Customer deposits		267	261
Regulatory liabilities		86	115
Other current liabilities		498	535
Total Current Liabilities		5,168	4,900
Long-term Debt
Long-term Debt		21,098	20,721
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		3,279	3,088
Investment tax credits		123	124
Accrued pension obligations		491	587
Asset retirement obligations		219	212
Regulatory liabilities		2,539	2,572
Other deferred credits and noncurrent liabilities		559	485
Total Deferred Credits and Other Noncurrent Liabilities		7,210	7,068
Commitments and Contingent Liabilities
Equity
Common stock	[1]	8	8
Additional paid-in capital		12,255	12,214
Earnings reinvested		5,383	5,127
Accumulated other comprehensive loss		(4,602)	(4,358)
Total Equity		13,044	12,991
Total Liabilities and Equity		46,520	45,680
PPL Electric Utilities Corp [Member]
Assets, Current [Abstract]
Cash and cash equivalents		13	262
Accounts receivable (less reserve:)
Customer		279	258
Other		21	22
Accounts receivable from affiliates		10	11
Unbilled revenues		90	134
Fuel, materials and supplies		56	33
Prepayments		65	6
Regulatory assets		31	26
Other current assets		12	9
Total Current Assets		577	761
Property, Plant and Equipment
Regulated utility plant		13,029	12,589
Less:  accumulated depreciation - regulated utility plant		3,207	3,078
Regulated utility plant, net		9,822	9,511
Construction work in progress		597	597
Property, Plant and Equipment, net		10,419	10,108
Other Noncurrent Assets
Regulatory assets		706	726
Other intangibles		264	263
Other noncurrent assets		54	43
Total Other Noncurrent Assets		1,024	1,032
Total Assets		12,020	11,901
Current Liabilities
Short-term debt		200	0
Accounts payable		370	438
Accounts payable to affiliates		41	32
Taxes		2	13
Interest		40	41
Regulatory liabilities		72	96
Other current liabilities		87	93
Total Current Liabilities		812	713
Long-term Debt
Long-term Debt		3,986	3,985
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		1,524	1,447
Accrued pension obligations		148	179
Regulatory liabilities		586	599
Other deferred credits and noncurrent liabilities		147	146
Total Deferred Credits and Other Noncurrent Liabilities		2,405	2,371
Commitments and Contingent Liabilities
Equity
Common stock	[2]	364	364
Additional paid-in capital		3,553	3,558
Earnings reinvested		900	910
Total Equity		4,817	4,832
Total Liabilities and Equity		12,020	11,901
LG And E And KU Energy LLC [Member]
Assets, Current [Abstract]
Cash and cash equivalents		152	27
Accounts receivable (less reserve:)
Customer		233	260
Other		62	71
Unbilled revenues		149	164
Fuel, materials and supplies		227	250
Prepayments		33	30
Regulatory assets		51	41
Other current assets		0	2
Total Current Assets		907	845
Property, Plant and Equipment
Regulated utility plant		15,123	14,646
Less:  accumulated depreciation - regulated utility plant		2,515	2,356
Regulated utility plant, net		12,608	12,290
Construction work in progress		681	794
Property, Plant and Equipment, net		13,289	13,084
Other Noncurrent Assets
Regulatory assets		766	766
Goodwill		996	996
Other intangibles		65	69
Other noncurrent assets		113	171
Total Other Noncurrent Assets		1,940	2,002
Total Assets		16,136	15,931
Current Liabilities
Short-term debt		0	388
Long-term debt due within one year		1,371	975
Notes payable with affiliates		252	150
Accounts payable		253	316
Accounts payable to affiliates		9	11
Taxes		74	58
Price risk management liabilities		4	4
Interest		41	40
Customer deposits		64	62
Regulatory liabilities		14	19
Asset retirement obligations		54	70
Other current liabilities		131	153
Total Current Liabilities		2,267	2,246
Long-term Debt
Long-term debt		4,476	4,377
Long-term debt to affiliate		650	650
Long-term Debt		5,126	5,027
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		1,126	1,069
Investment tax credits		122	124
Accrued pension obligations		183	233
Asset retirement obligations		164	145
Regulatory liabilities		1,953	1,973
Price risk management liabilities		24	17
Other deferred credits and noncurrent liabilities		149	155
Total Deferred Credits and Other Noncurrent Liabilities		3,721	3,716
Commitments and Contingent Liabilities
Equity
Member's Equity		5,022	4,942
Total Liabilities and Equity		16,136	15,931
Louisville Gas And Electric Co [Member]
Assets, Current [Abstract]
Cash and cash equivalents		5	15
Accounts receivable (less reserve:)
Customer		107	121
Other		31	41
Accounts receivable from affiliates		16	18
Unbilled revenues		68	76
Fuel, materials and supplies		102	122
Prepayments		16	14
Regulatory assets		23	25
Other current assets		1	1
Total Current Assets		369	433
Property, Plant and Equipment
Regulated utility plant		6,522	6,372
Less:  accumulated depreciation - regulated utility plant		931	846
Regulated utility plant, net		5,591	5,526
Construction work in progress		316	297
Property, Plant and Equipment, net		5,907	5,823
Other Noncurrent Assets
Regulatory assets		378	380
Goodwill		389	389
Other intangibles		38	41
Other noncurrent assets		75	67
Total Other Noncurrent Assets		880	877
Total Assets		7,156	7,133
Current Liabilities
Short-term debt		0	238
Long-term debt due within one year		264	0
Notes payable with affiliates		190	0
Accounts payable		131	172
Accounts payable to affiliates		22	31
Taxes		54	33
Price risk management liabilities		4	4
Interest		15	15
Customer deposits		32	31
Regulatory liabilities		4	2
Asset retirement obligations		18	24
Other current liabilities		41	47
Total Current Liabilities		775	597
Long-term Debt
Long-term Debt		1,741	2,005
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		707	697
Investment tax credits		33	34
Asset retirement obligations		49	49
Regulatory liabilities		877	883
Price risk management liabilities		24	17
Other deferred credits and noncurrent liabilities		91	89
Total Deferred Credits and Other Noncurrent Liabilities		1,781	1,769
Commitments and Contingent Liabilities
Equity
Common stock	[3]	424	424
Additional paid-in capital		1,873	1,820
Earnings reinvested		562	518
Total Equity		2,859	2,762
Total Liabilities and Equity		7,156	7,133
Kentucky Utilities Co [Member]
Assets, Current [Abstract]
Cash and cash equivalents		145	12
Accounts receivable (less reserve:)
Customer		126	139
Other		28	27
Notes receivable from affiliate		190	0
Unbilled revenues		81	88
Fuel, materials and supplies		125	128
Prepayments		15	14
Regulatory assets		28	16
Other current assets		0	1
Total Current Assets		738	425
Property, Plant and Equipment
Regulated utility plant		8,587	8,262
Less:  accumulated depreciation - regulated utility plant		1,579	1,507
Regulated utility plant, net		7,008	6,755
Construction work in progress		364	496
Property, Plant and Equipment, net		7,372	7,251
Other Noncurrent Assets
Regulatory assets		388	386
Goodwill		607	607
Other intangibles		27	28
Other noncurrent assets		111	128
Total Other Noncurrent Assets		1,133	1,149
Total Assets		9,243	8,825
Current Liabilities
Short-term debt		0	150
Long-term debt due within one year		632	500
Accounts payable		103	121
Accounts payable to affiliates		39	52
Taxes		50	26
Interest		21	20
Customer deposits		32	31
Regulatory liabilities		10	17
Asset retirement obligations		36	46
Other current liabilities		44	51
Total Current Liabilities		967	1,014
Long-term Debt
Long-term Debt		2,485	2,123
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		808	792
Investment tax credits		89	90
Asset retirement obligations		115	96
Regulatory liabilities		1,076	1,090
Other deferred credits and noncurrent liabilities		48	46
Total Deferred Credits and Other Noncurrent Liabilities		2,136	2,114
Commitments and Contingent Liabilities
Equity
Common stock	[4]	308	308
Additional paid-in capital		2,766	2,729
Earnings reinvested		581	537
Total Equity		3,655	3,574
Total Liabilities and Equity		$ 9,243	$ 8,825

[1] 1,560,000 shares authorized; 768,783 and 767,233 shares issued and outstanding at June 30, 2020 and December 31, 2019.

[2] 170,000 shares authorized; 66,368 shares issued and outstanding at June 30, 2020 and December 31, 2019.

[3] 75,000 shares authorized; 21,294 shares issued and outstanding at June 30, 2020 and December 31, 2019.

[4] 80,000 shares authorized; 37,818 shares issued and outstanding at June 30, 2020 and December 31, 2019.