CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions		Jun. 30, 2019	Dec. 31, 2018
Assets, Current [Abstract]
Cash and cash equivalents		$ 406	$ 621
Accounts receivable (less reserve:)
Customer		662	663
Other		110	107
Unbilled revenues		425	496
Fuel, materials and supplies		286	303
Prepayments		142	70
Price risk management assets		133	109
Regulatory assets		43	36
Other current assets		67	63
Total Current Assets		2,231	2,432
Property, Plant and Equipment
Regulated utility plant		40,793	39,734
Less: accumulated depreciation - regulated utility plant		7,583	7,310
Regulated utility plant, net		33,210	32,424
Non-regulated property, plant and equipment		342	355
Less: accumulated depreciation - non-regulated property, plant and equipment		104	101
Non-regulated property, plant and equipment, net		238	254
Construction work in progress		1,682	1,780
Property, Plant and Equipment, net		35,130	34,458
Other Noncurrent Assets
Regulatory assets		1,662	1,673
Goodwill		3,139	3,162
Other intangibles		710	716
Pension benefit asset		832	535
Price risk management assets		209	228
Other noncurrent assets		291	192
Total Other Noncurrent Assets		6,843	6,506
Total Assets		44,204	43,396
Current Liabilities
Short-term debt		1,636	1,430
Long-term debt due within one year		136	530
Accounts payable		830	989
Taxes		111	110
Interest		215	278
Dividends		298	296
Customer deposits		265	257
Regulatory liabilities		60	122
Other current liabilities		512	551
Total Current Liabilities		4,063	4,563
Long-term Debt
Long-term Debt		20,965	20,069
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		2,986	2,796
Investment tax credits		125	126
Accrued pension obligations		716	771
Asset retirement obligations		223	264
Regulatory liabilities		2,685	2,714
Other deferred credits and noncurrent liabilities		458	436
Total Deferred Credits and Other Noncurrent Liabilities		7,193	7,107
Commitments and Contingent Liabilities
Equity
Common stock	[1]	7	7
Additional paid-in capital		11,069	11,021
Earnings reinvested		4,903	4,593
Accumulated other comprehensive loss		(3,996)	(3,964)
Total Equity		11,983	11,657
Total Liabilities and Equity		44,204	43,396
PPL Electric Utilities Corp [Member]
Assets, Current [Abstract]
Cash and cash equivalents		20	267
Accounts receivable (less reserve:)
Customer		286	264
Other		21	38
Accounts receivable from affiliates		10	11
Unbilled revenues		89	120
Fuel, materials and supplies		26	25
Prepayments		62	5
Regulatory assets		17	11
Other current assets		8	9
Total Current Assets		539	750
Property, Plant and Equipment
Regulated utility plant		12,036	11,637
Less: accumulated depreciation - regulated utility plant		2,961	2,856
Regulated utility plant, net		9,075	8,781
Construction work in progress		627	586
Property, Plant and Equipment, net		9,702	9,367
Other Noncurrent Assets
Regulatory assets		805	824
Other intangibles		260	260
Other noncurrent assets		48	42
Total Other Noncurrent Assets		1,113	1,126
Total Assets		11,354	11,243
Current Liabilities
Short-term debt		185	0
Accounts payable		374	418
Accounts payable to affiliates		30	25
Taxes		8	12
Interest		37	37
Regulatory liabilities		43	74
Other current liabilities		95	101
Total Current Liabilities		772	667
Long-term Debt
Long-term Debt		3,695	3,694
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		1,371	1,320
Accrued pension obligations		253	282
Regulatory liabilities		661	675
Other deferred credits and noncurrent liabilities		141	144
Total Deferred Credits and Other Noncurrent Liabilities		2,426	2,421
Commitments and Contingent Liabilities
Equity
Common stock	[2]	364	364
Additional paid-in capital		3,158	3,158
Earnings reinvested		939	939
Total Equity		4,461	4,461
Total Liabilities and Equity		11,354	11,243
LG And E And KU Energy LLC [Member]
Assets, Current [Abstract]
Cash and cash equivalents		32	24
Accounts receivable (less reserve:)
Customer		219	239
Other		69	63
Accounts receivable from affiliates		1	0
Unbilled revenues		156	169
Fuel, materials and supplies		228	248
Prepayments		30	25
Regulatory assets		26	25
Total Current Assets		761	793
Property, Plant and Equipment
Regulated utility plant		14,072	13,721
Less: accumulated depreciation - regulated utility plant		2,192	2,125
Regulated utility plant, net		11,880	11,596
Construction work in progress		929	1,018
Property, Plant and Equipment, net		12,809	12,614
Other Noncurrent Assets
Regulatory assets		857	849
Goodwill		996	996
Other intangibles		74	78
Other noncurrent assets		133	82
Total Other Noncurrent Assets		2,060	2,005
Total Assets		15,630	15,412
Current Liabilities
Short-term debt		96	514
Long-term debt due within one year		136	530
Notes payable with affiliates		203	113
Accounts payable		283	366
Accounts payable to affiliates		8	9
Taxes		38	63
Price risk management liabilities		5	4
Interest		39	32
Customer deposits		63	61
Regulatory liabilities		17	48
Asset retirement obligations		80	82
Other current liabilities		136	126
Total Current Liabilities		1,104	1,948
Long-term Debt
Long-term debt		5,216	4,322
Long-term debt to affiliate		650	650
Long-term Debt		5,866	4,972
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		1,020	956
Investment tax credits		124	126
Accrued pension obligations		264	282
Asset retirement obligations		175	214
Regulatory liabilities		2,024	2,039
Price risk management liabilities		18	16
Other deferred credits and noncurrent liabilities		158	136
Total Deferred Credits and Other Noncurrent Liabilities		3,783	3,769
Commitments and Contingent Liabilities
Equity
Member's Equity		4,877	4,723
Total Liabilities and Equity		15,630	15,412
Louisville Gas And Electric Co [Member]
Assets, Current [Abstract]
Cash and cash equivalents		9	10
Accounts receivable (less reserve:)
Customer		99	110
Other		38	30
Accounts receivable from affiliates		18	24
Unbilled revenues		68	77
Fuel, materials and supplies		100	127
Prepayments		15	12
Regulatory assets		21	21
Total Current Assets		368	411
Property, Plant and Equipment
Regulated utility plant		6,018	5,816
Less: accumulated depreciation - regulated utility plant		786	741
Regulated utility plant, net		5,232	5,075
Construction work in progress		438	514
Property, Plant and Equipment, net		5,670	5,589
Other Noncurrent Assets
Regulatory assets		434	431
Goodwill		389	389
Other intangibles		44	47
Other noncurrent assets		34	16
Total Other Noncurrent Assets		901	883
Total Assets		6,939	6,883
Current Liabilities
Short-term debt		96	279
Long-term debt due within one year		40	434
Accounts payable		146	172
Accounts payable to affiliates		22	26
Taxes		19	26
Price risk management liabilities		5	4
Interest		15	11
Customer deposits		30	29
Regulatory liabilities		4	17
Asset retirement obligations		26	23
Other current liabilities		47	39
Total Current Liabilities		450	1,060
Long-term Debt
Long-term Debt		1,964	1,375
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		663	628
Investment tax credits		34	34
Asset retirement obligations		63	80
Regulatory liabilities		902	915
Price risk management liabilities		18	16
Other deferred credits and noncurrent liabilities		96	88
Total Deferred Credits and Other Noncurrent Liabilities		1,776	1,761
Commitments and Contingent Liabilities
Equity
Common stock	[3]	424	424
Additional paid-in capital		1,820	1,795
Earnings reinvested		505	468
Total Equity		2,749	2,687
Total Liabilities and Equity		6,939	6,883
Kentucky Utilities Co [Member]
Assets, Current [Abstract]
Cash and cash equivalents		23	14
Accounts receivable (less reserve:)
Customer		120	129
Other		27	34
Unbilled revenues		88	92
Fuel, materials and supplies		128	121
Prepayments		16	11
Regulatory assets		5	4
Total Current Assets		407	405
Property, Plant and Equipment
Regulated utility plant		8,042	7,895
Less: accumulated depreciation - regulated utility plant		1,403	1,382
Regulated utility plant, net		6,639	6,513
Construction work in progress		490	503
Property, Plant and Equipment, net		7,129	7,016
Other Noncurrent Assets
Regulatory assets		423	418
Goodwill		607	607
Other intangibles		30	31
Other noncurrent assets		95	63
Total Other Noncurrent Assets		1,155	1,119
Total Assets		8,691	8,540
Current Liabilities
Short-term debt		0	235
Long-term debt due within one year		96	96
Accounts payable		124	171
Accounts payable to affiliates		38	53
Taxes		22	24
Interest		19	16
Customer deposits		33	32
Regulatory liabilities		13	31
Asset retirement obligations		54	59
Other current liabilities		55	35
Total Current Liabilities		454	752
Long-term Debt
Long-term Debt		2,528	2,225
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		774	735
Investment tax credits		90	92
Asset retirement obligations		112	134
Regulatory liabilities		1,122	1,124
Other deferred credits and noncurrent liabilities		50	36
Total Deferred Credits and Other Noncurrent Liabilities		2,148	2,121
Commitments and Contingent Liabilities
Equity
Common stock	[4]	308	308
Additional paid-in capital		2,729	2,661
Earnings reinvested		524	473
Total Equity		3,561	3,442
Total Liabilities and Equity		$ 8,691	$ 8,540

[1] 1,560,000 shares authorized; 721,840 and 720,323 shares issued and outstanding at June 30, 2019 and December 31, 2018.

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

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

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