CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Current Assets
Cash and cash equivalents		$ 708	$ 815
Accounts receivable (less reserve:)
Customer		790	687
Other		91	105
Unbilled revenues		498	504
Fuel, materials and supplies		361	332
Prepayments		96	79
Price risk management assets		94	147
Regulatory assets		99	67
Other current assets		130	98
Total Current Assets		2,768	2,767
Property, Plant and Equipment
Regulated utility plant		45,887	42,709
Less: accumulated depreciation - regulated utility plant		8,894	8,055
Regulated utility plant, net		36,993	34,654
Non-regulated property, plant and equipment		498	357
Less: accumulated depreciation - non-regulated property, plant and equipment		102	109
Non-regulated property, plant and equipment, net		396	248
Construction work in progress		1,503	1,580
Property, Plant and Equipment, net		38,892	36,482
Other Noncurrent Assets
Regulatory assets		1,262	1,492
Goodwill		3,274	3,198
Other intangibles		764	742
Pension benefit asset		706	464
Price risk management assets		52	149
Other noncurrent assets		398	386
Total Other Noncurrent Assets		6,456	6,431
Total Assets		48,116	45,680
Current Liabilities
Short-term debt		1,662	1,151
Long-term debt due within one year		1,574	1,172
Accounts payable		965	956
Taxes		91	99
Interest		303	294
Dividends		319	317
Customer deposits		300	261
Regulatory liabilities		79	115
Other current liabilities		684	535
Total Current Liabilities		5,977	4,900
Long-term Debt [Abstract]
Long-term Debt		21,553	20,721
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		3,568	3,088
Investment tax credits		122	124
Accrued pension obligations		200	587
Asset retirement obligations		200	212
Regulatory liabilities		2,530	2,572
Other deferred credits and noncurrent liabilities		593	485
Total Deferred Credits and Other Noncurrent Liabilities		7,213	7,068
Commitments and Contingent Liabilities
Equity
Common stock	[1]	8	8
Additional paid-in capital		12,270	12,214
Earnings reinvested		5,315	5,127
Accumulated other comprehensive loss		(4,220)	(4,358)
Total Equity		13,373	12,991
Total Liabilities and Equity		$ 48,116	$ 45,680
Common stock par value		$ 0.01	$ 0.01
PPL Electric Utilities Corp [Member]
Current Assets
Cash and cash equivalents		$ 40	$ 262
Accounts receivable (less reserve:)
Customer		311	258
Other		17	22
Accounts receivable from affiliates		10	11
Unbilled revenues		121	134
Fuel, materials and supplies		59	33
Prepayments		9	6
Regulatory assets		40	26
Other current assets		13	9
Total Current Assets		620	761
Property, Plant and Equipment
Regulated utility plant		13,514	12,589
Less: accumulated depreciation - regulated utility plant		3,297	3,078
Regulated utility plant, net		10,217	9,511
Construction work in progress		592	597
Property, Plant and Equipment, net		10,809	10,108
Other Noncurrent Assets
Regulatory assets		541	726
Other intangibles		268	263
Other noncurrent assets		86	43
Total Other Noncurrent Assets		895	1,032
Total Assets		12,324	11,901
Current Liabilities
Short-term debt		400	0
Long-term debt due within one year		400	0
Accounts payable		428	438
Accounts payable to affiliates		39	32
Taxes		17	13
Interest		39	41
Regulatory liabilities		68	96
Other current liabilities		105	93
Total Current Liabilities		1,096	713
Long-term Debt [Abstract]
Long-term Debt		3,836	3,985
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		1,559	1,447
Accrued pension obligations		8	179
Regulatory liabilities		578	599
Other deferred credits and noncurrent liabilities		123	146
Total Deferred Credits and Other Noncurrent Liabilities		2,268	2,371
Commitments and Contingent Liabilities
Equity
Common stock	[2]	364	364
Additional paid-in capital		3,753	3,558
Earnings reinvested		1,007	910
Total Equity		5,124	4,832
Total Liabilities and Equity		$ 12,324	$ 11,901
Common stock no par value		$ 0	$ 0
LG And E And KU Energy LLC [Member]
Current Assets
Cash and cash equivalents		$ 29	$ 27
Accounts receivable (less reserve:)
Customer		283	260
Other		69	71
Unbilled revenues		176	164
Fuel, materials and supplies		242	250
Prepayments		30	30
Regulatory assets		59	41
Other current assets		4	2
Total Current Assets		892	845
Property, Plant and Equipment
Regulated utility plant		15,557	14,646
Less: accumulated depreciation - regulated utility plant		2,717	2,356
Regulated utility plant, net		12,840	12,290
Construction work in progress		640	794
Property, Plant and Equipment, net		13,480	13,084
Other Noncurrent Assets
Regulatory assets		721	766
Goodwill		996	996
Other intangibles		61	69
Other noncurrent assets		127	171
Total Other Noncurrent Assets		1,905	2,002
Total Assets		16,277	15,931
Current Liabilities
Short-term debt		465	388
Long-term debt due within one year		674	975
Notes payable with affiliates		251	150
Accounts payable		294	316
Accounts payable to affiliates		16	11
Taxes		71	58
Interest		37	40
Asset Retirement Obligations		50	70
Price risk management liabilities		2	4
Customer deposits		64	62
Regulatory liabilities		11	19
Other current liabilities		162	153
Total Current Liabilities		2,097	2,246
Long-term Debt [Abstract]
Long-term debt		4,200	4,377
Long-term debt to affiliate		1,200	650
Long-term Debt		5,400	5,027
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		1,175	1,069
Investment tax credits		121	124
Price risk management liabilities		21	17
Accrued pension obligations		112	233
Asset retirement obligations		132	145
Regulatory liabilities		1,952	1,973
Other deferred credits and noncurrent liabilities		151	155
Total Deferred Credits and Other Noncurrent Liabilities		3,664	3,716
Commitments and Contingent Liabilities
Equity
Accumulated other comprehensive loss		(86)	(93)
Member's Equity		5,116	4,942
Total Liabilities and Equity		16,277	15,931
Louisville Gas And Electric Co [Member]
Current Assets
Cash and cash equivalents		7	15
Accounts receivable (less reserve:)
Customer		127	121
Other		35	41
Accounts receivable from affiliates		16	18
Unbilled revenues		79	76
Fuel, materials and supplies		119	122
Prepayments		14	14
Regulatory assets		23	25
Other current assets		1	1
Total Current Assets		421	433
Property, Plant and Equipment
Regulated utility plant		6,735	6,372
Less: accumulated depreciation - regulated utility plant		1,020	846
Regulated utility plant, net		5,715	5,526
Construction work in progress		320	297
Property, Plant and Equipment, net		6,035	5,823
Other Noncurrent Assets
Regulatory assets		351	380
Goodwill		389	389
Other intangibles		35	41
Other noncurrent assets		114	67
Total Other Noncurrent Assets		889	877
Total Assets		7,345	7,133
Current Liabilities
Short-term debt		262	238
Long-term debt due within one year		292	0
Accounts payable		153	172
Accounts payable to affiliates		31	31
Taxes		32	33
Interest		15	15
Asset Retirement Obligations		10	24
Price risk management liabilities		2	4
Customer deposits		32	31
Regulatory liabilities		0	2
Other current liabilities		50	47
Total Current Liabilities		879	597
Long-term Debt [Abstract]
Long-term Debt		1,715	2,005
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		716	697
Investment tax credits		33	34
Price risk management liabilities		21	17
Asset retirement obligations		57	49
Regulatory liabilities		882	883
Other deferred credits and noncurrent liabilities		94	89
Total Deferred Credits and Other Noncurrent Liabilities		1,803	1,769
Commitments and Contingent Liabilities
Equity
Common stock	[3]	424	424
Additional paid-in capital		1,923	1,820
Earnings reinvested		601	518
Total Equity		2,948	2,762
Total Liabilities and Equity		$ 7,345	$ 7,133
Common stock no par value		$ 0	$ 0
Kentucky Utilities Co [Member]
Current Assets
Cash and cash equivalents		$ 22	$ 12
Accounts receivable (less reserve:)
Customer		156	139
Other		30	27
Accounts receivable from affiliates		1	0
Unbilled revenues		97	88
Fuel, materials and supplies		123	128
Prepayments		15	14
Regulatory assets		36	16
Other current assets		1	1
Total Current Assets		481	425
Property, Plant and Equipment
Regulated utility plant		8,808	8,262
Less: accumulated depreciation - regulated utility plant		1,690	1,507
Regulated utility plant, net		7,118	6,755
Construction work in progress		321	496
Property, Plant and Equipment, net		7,439	7,251
Other Noncurrent Assets
Regulatory assets		370	386
Goodwill		607	607
Other intangibles		26	28
Other noncurrent assets		149	128
Total Other Noncurrent Assets		1,152	1,149
Total Assets		9,072	8,825
Current Liabilities
Short-term debt		203	150
Long-term debt due within one year		132	500
Accounts payable		121	121
Accounts payable to affiliates		43	52
Taxes		29	26
Interest		19	20
Asset Retirement Obligations		40	46
Customer deposits		32	31
Regulatory liabilities		11	17
Other current liabilities		59	51
Total Current Liabilities		689	1,014
Long-term Debt [Abstract]
Long-term Debt		2,486	2,123
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		835	792
Investment tax credits		88	90
Asset retirement obligations		75	96
Regulatory liabilities		1,070	1,090
Other deferred credits and noncurrent liabilities		47	46
Total Deferred Credits and Other Noncurrent Liabilities		2,115	2,114
Commitments and Contingent Liabilities
Equity
Common stock	[4]	308	308
Additional paid-in capital		2,857	2,729
Earnings reinvested		617	537
Total Equity		3,782	3,574
Total Liabilities and Equity		$ 9,072	$ 8,825
Common stock no par value		$ 0	$ 0

[1] 1,560,000 shares authorized; 768,907 and 767,233 shares issued and outstanding at December 31, 2020 and December 31, 2019.

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

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

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