CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions		Sep. 30, 2020	Dec. 31, 2019
Assets, Current [Abstract]
Cash and cash equivalents		$ 746	$ 815
Accounts receivable (less reserve:)
Customer		742	687
Other		88	105
Unbilled revenues		382	504
Fuel, materials and supplies		351	332
Prepayments		134	79
Price risk management assets		136	147
Regulatory assets		82	67
Other current assets		116	98
Total Current Assets		2,695	2,767
Property, Plant and Equipment
Regulated utility plant		45,058	42,709
Less:  accumulated depreciation - regulated utility plant		8,726	8,055
Regulated utility plant, net		36,332	34,654
Non-regulated property, plant and equipment		490	357
Less:  accumulated depreciation - non-regulated property, plant and equipment		98	109
Non-regulated property, plant and equipment, net		392	248
Construction work in progress		1,596	1,580
Property, Plant and Equipment, net		38,320	36,482
Other Noncurrent Assets
Regulatory assets		1,450	1,492
Goodwill		3,283	3,198
Other intangibles		763	742
Pension benefit asset		972	464
Price risk management assets		53	149
Other noncurrent assets		388	386
Total Other Noncurrent Assets		6,909	6,431
Total Assets		47,924	45,680
Current Liabilities
Short-term debt		1,368	1,151
Long-term debt due within one year		1,525	1,172
Accounts payable		864	956
Taxes		93	99
Interest		385	294
Dividends		319	317
Customer deposits		298	261
Regulatory liabilities		90	115
Other current liabilities		500	535
Total Current Liabilities		5,442	4,900
Long-term Debt
Long-term Debt		21,243	20,721
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		3,569	3,088
Investment tax credits		122	124
Accrued pension obligations		485	587
Asset retirement obligations		223	212
Regulatory liabilities		2,543	2,572
Other deferred credits and noncurrent liabilities		611	485
Total Deferred Credits and Other Noncurrent Liabilities		7,553	7,068
Commitments and Contingent Liabilities
Equity
Common stock	[1]	8	8
Additional paid-in capital		12,260	12,214
Earnings reinvested		5,345	5,127
Accumulated other comprehensive loss		(3,927)	(4,358)
Total Equity		13,686	12,991
Total Liabilities and Equity		47,924	45,680
PPL Electric Utilities Corp [Member]
Assets, Current [Abstract]
Cash and cash equivalents		26	262
Accounts receivable (less reserve:)
Customer		298	258
Other		18	22
Accounts receivable from affiliates		10	11
Unbilled revenues		80	134
Fuel, materials and supplies		64	33
Prepayments		36	6
Regulatory assets		28	26
Other current assets		15	9
Total Current Assets		575	761
Property, Plant and Equipment
Regulated utility plant		13,240	12,589
Less:  accumulated depreciation - regulated utility plant		3,276	3,078
Regulated utility plant, net		9,964	9,511
Construction work in progress		635	597
Property, Plant and Equipment, net		10,599	10,108
Other Noncurrent Assets
Regulatory assets		708	726
Other intangibles		265	263
Other noncurrent assets		66	43
Total Other Noncurrent Assets		1,039	1,032
Total Assets		12,213	11,901
Current Liabilities
Short-term debt		280	0
Long-term debt due within one year		400	0
Accounts payable		394	438
Accounts payable to affiliates		39	32
Taxes		17	13
Interest		47	41
Regulatory liabilities		73	96
Other current liabilities		88	93
Total Current Liabilities		1,338	713
Long-term Debt
Long-term Debt		3,587	3,985
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		1,539	1,447
Accrued pension obligations		151	179
Regulatory liabilities		582	599
Other deferred credits and noncurrent liabilities		142	146
Total Deferred Credits and Other Noncurrent Liabilities		2,414	2,371
Commitments and Contingent Liabilities
Equity
Common stock	[2]	364	364
Additional paid-in capital		3,553	3,558
Earnings reinvested		957	910
Total Equity		4,874	4,832
Total Liabilities and Equity		12,213	11,901
LG And E And KU Energy LLC [Member]
Assets, Current [Abstract]
Cash and cash equivalents		25	27
Accounts receivable (less reserve:)
Customer		269	260
Other		63	71
Unbilled revenues		127	164
Fuel, materials and supplies		230	250
Prepayments		34	30
Regulatory assets		54	41
Other current assets		1	2
Total Current Assets		803	845
Property, Plant and Equipment
Regulated utility plant		15,259	14,646
Less:  accumulated depreciation - regulated utility plant		2,627	2,356
Regulated utility plant, net		12,632	12,290
Construction work in progress		735	794
Property, Plant and Equipment, net		13,367	13,084
Other Noncurrent Assets
Regulatory assets		742	766
Goodwill		996	996
Other intangibles		63	69
Other noncurrent assets		117	171
Total Other Noncurrent Assets		1,918	2,002
Total Assets		16,088	15,931
Current Liabilities
Short-term debt		345	388
Long-term debt due within one year		424	975
Notes payable with affiliates		153	150
Accounts payable		253	316
Accounts payable to affiliates		18	11
Taxes		58	58
Price risk management liabilities		2	4
Interest		82	40
Customer deposits		64	62
Regulatory liabilities		17	19
Asset retirement obligations		44	70
Other current liabilities		134	153
Total Current Liabilities		1,594	2,246
Long-term Debt
Long-term debt		4,449	4,377
Long-term debt to affiliate		1,200	650
Long-term Debt		5,649	5,027
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		1,156	1,069
Investment tax credits		122	124
Accrued pension obligations		163	233
Asset retirement obligations		163	145
Regulatory liabilities		1,961	1,973
Price risk management liabilities		24	17
Other deferred credits and noncurrent liabilities		154	155
Total Deferred Credits and Other Noncurrent Liabilities		3,743	3,716
Commitments and Contingent Liabilities
Equity
Accumulated other comprehensive loss		(94)	(93)
Member's Equity		5,102	4,942
Total Liabilities and Equity		16,088	15,931
Louisville Gas And Electric Co [Member]
Assets, Current [Abstract]
Cash and cash equivalents		10	15
Accounts receivable (less reserve:)
Customer		118	121
Other		31	41
Accounts receivable from affiliates		12	18
Unbilled revenues		54	76
Fuel, materials and supplies		113	122
Prepayments		16	14
Regulatory assets		23	25
Other current assets		2	1
Total Current Assets		379	433
Property, Plant and Equipment
Regulated utility plant		6,571	6,372
Less:  accumulated depreciation - regulated utility plant		978	846
Regulated utility plant, net		5,593	5,526
Construction work in progress		366	297
Property, Plant and Equipment, net		5,959	5,823
Other Noncurrent Assets
Regulatory assets		360	380
Goodwill		389	389
Other intangibles		37	41
Other noncurrent assets		97	67
Total Other Noncurrent Assets		883	877
Total Assets		7,221	7,133
Current Liabilities
Short-term debt		206	238
Long-term debt due within one year		292	0
Accounts payable		125	172
Accounts payable to affiliates		26	31
Taxes		32	33
Price risk management liabilities		2	4
Interest		33	15
Customer deposits		32	31
Regulatory liabilities		5	2
Asset retirement obligations		14	24
Other current liabilities		40	47
Total Current Liabilities		807	597
Long-term Debt
Long-term Debt		1,714	2,005
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		712	697
Investment tax credits		33	34
Asset retirement obligations		63	49
Regulatory liabilities		885	883
Price risk management liabilities		24	17
Other deferred credits and noncurrent liabilities		92	89
Total Deferred Credits and Other Noncurrent Liabilities		1,809	1,769
Commitments and Contingent Liabilities
Equity
Common stock	[3]	424	424
Additional paid-in capital		1,873	1,820
Earnings reinvested		594	518
Total Equity		2,891	2,762
Total Liabilities and Equity		7,221	7,133
Kentucky Utilities Co [Member]
Assets, Current [Abstract]
Cash and cash equivalents		15	12
Accounts receivable (less reserve:)
Customer		151	139
Other		38	27
Unbilled revenues		73	88
Fuel, materials and supplies		117	128
Prepayments		16	14
Regulatory assets		31	16
Other current assets		0	1
Total Current Assets		441	425
Property, Plant and Equipment
Regulated utility plant		8,673	8,262
Less:  accumulated depreciation - regulated utility plant		1,644	1,507
Regulated utility plant, net		7,029	6,755
Construction work in progress		369	496
Property, Plant and Equipment, net		7,398	7,251
Other Noncurrent Assets
Regulatory assets		382	386
Goodwill		607	607
Other intangibles		27	28
Other noncurrent assets		125	128
Total Other Noncurrent Assets		1,141	1,149
Total Assets		8,980	8,825
Current Liabilities
Short-term debt		139	150
Long-term debt due within one year		132	500
Accounts payable		109	121
Accounts payable to affiliates		39	52
Taxes		27	26
Interest		43	20
Customer deposits		32	31
Regulatory liabilities		12	17
Asset retirement obligations		30	46
Other current liabilities		45	51
Total Current Liabilities		608	1,014
Long-term Debt
Long-term Debt		2,485	2,123
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		828	792
Investment tax credits		89	90
Asset retirement obligations		100	96
Regulatory liabilities		1,076	1,090
Other deferred credits and noncurrent liabilities		50	46
Total Deferred Credits and Other Noncurrent Liabilities		2,143	2,114
Commitments and Contingent Liabilities
Equity
Common stock	[4]	308	308
Additional paid-in capital		2,827	2,729
Earnings reinvested		609	537
Total Equity		3,744	3,574
Total Liabilities and Equity		$ 8,980	$ 8,825

[1] 1,560,000 shares authorized; 768,797 and 767,233 shares issued and outstanding at September 30, 2020 and December 31, 2019.

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

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

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