CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions		Dec. 31, 2017	Dec. 31, 2016
Current Assets
Cash and cash equivalents		$ 485	$ 341
Accounts receivable (less reserve:)
Customer		681	666
Other		100	46
Unbilled revenues		543	480
Fuel, materials and supplies		320	356
Prepayments		66	63
Price risk management assets		49	63
Regulatory assets		34	39
Other current assets		50	52
Total Current Assets		2,294	2,067
Property, Plant and Equipment
Regulated utility plant		38,228	34,674
Less: accumulated depreciation - regulated utility plant		6,785	6,013
Regulated utility plant, net		31,443	28,661
Non-regulated property, plant and equipment		384	413
Less: accumulated depreciation - non-regulated property, plant and equipment		110	134
Non-regulated property, plant and equipment, net		274	279
Construction work in progress		1,375	1,134
Property, Plant and Equipment, net		33,092	30,074
Other Noncurrent Assets
Regulatory assets		1,504	1,918
Goodwill		3,258	3,060
Other intangibles		697	700
Pension benefit asset		284	9
Price risk management assets		215	336
Other noncurrent assets		135	151
Total Other Noncurrent Assets		6,093	6,174
Total Assets		41,479	38,315
Current Liabilities
Short-term debt		1,080	923
Long-term debt due within one year		348	518
Accounts payable		924	820
Taxes		105	101
Interest		282	270
Dividends		273	259
Customer deposits		292	276
Regulatory liabilities		95	101
Other current liabilities		624	569
Total Current Liabilities		4,023	3,837
Long-term Debt [Abstract]
Long-term Debt		19,847	17,808
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		2,462	3,889
Investment tax credits		129	132
Accrued pension obligations		800	1,001
Asset retirement obligations		312	428
Regulatory liabilities		2,704	899
Other deferred credits and noncurrent liabilities		441	422
Total Deferred Credits and Other Noncurrent Liabilities		6,848	6,771
Commitments and Contingent Liabilities
Equity
Common stock	[1]	7	7
Additional paid-in capital		10,305	9,841
Earnings reinvested		3,871	3,829
Accumulated other comprehensive loss		(3,422)	(3,778)
Total Equity		10,761	9,899
Total Liabilities and Equity		41,479	38,315
PPL Electric Utilities Corp [Member]
Current Assets
Cash and cash equivalents		49	13
Accounts receivable (less reserve:)
Customer		279	272
Other		71	21
Unbilled revenues		127	114
Fuel, materials and supplies		34	32
Prepayments		6	9
Regulatory assets		16	19
Other current assets		6	8
Total Current Assets		588	488
Property, Plant and Equipment
Regulated utility plant		10,785	9,654
Less: accumulated depreciation - regulated utility plant		2,778	2,714
Regulated utility plant, net		8,007	6,940
Construction work in progress		508	641
Property, Plant and Equipment, net		8,515	7,581
Other Noncurrent Assets
Regulatory assets		709	1,094
Other intangibles		259	251
Other noncurrent assets		11	12
Total Other Noncurrent Assets		979	1,357
Total Assets		10,082	9,426
Current Liabilities
Short-term debt		0	295
Long-term debt due within one year		0	224
Accounts payable		386	367
Accounts payable to affiliates		31	42
Taxes		8	12
Interest		36	34
Regulatory liabilities		86	83
Other current liabilities		98	101
Total Current Liabilities		645	1,158
Long-term Debt [Abstract]
Long-term Debt		3,298	2,607
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		1,154	1,899
Accrued pension obligations		246	281
Regulatory liabilities		668	0
Other deferred credits and noncurrent liabilities		79	90
Total Deferred Credits and Other Noncurrent Liabilities		2,147	2,270
Commitments and Contingent Liabilities
Equity
Common stock	[2]	364	364
Additional paid-in capital		2,729	2,154
Earnings reinvested		899	873
Total Equity		3,992	3,391
Total Liabilities and Equity		10,082	9,426
LG And E And KU Energy LLC [Member]
Current Assets
Cash and cash equivalents		30	13
Accounts receivable (less reserve:)
Customer		246	235
Other		44	17
Unbilled revenues		203	170
Fuel, materials and supplies		254	297
Prepayments		25	24
Regulatory assets		18	20
Other current assets		8	4
Total Current Assets		828	780
Property, Plant and Equipment
Regulated utility plant		13,187	12,746
Less: accumulated depreciation - regulated utility plant		1,785	1,465
Regulated utility plant, net		11,402	11,281
Construction work in progress		627	317
Property, Plant and Equipment, net		12,029	11,598
Other Noncurrent Assets
Regulatory assets		795	824
Goodwill		996	996
Other intangibles		86	95
Other noncurrent assets		68	78
Total Other Noncurrent Assets		1,945	1,993
Total Assets		14,802	14,371
Current Liabilities
Short-term debt		244	185
Long-term debt due within one year		98	194
Notes payable with affiliates		225	163
Accounts payable		338	251
Accounts payable to affiliates		7	6
Taxes		66	39
Interest		32	32
Asset Retirement Obligations		85	60
Price risk management liabilities		4	4
Customer deposits		58	56
Regulatory liabilities		9	18
Other current liabilities		161	119
Total Current Liabilities		1,327	1,127
Long-term Debt [Abstract]
Long-term debt		4,661	4,471
Long-term debt to affiliate		400	400
Long-term Debt		5,061	4,871
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		866	1,735
Investment tax credits		129	132
Price risk management liabilities		22	27
Accrued pension obligations		365	350
Asset retirement obligations		271	373
Regulatory liabilities		2,036	899
Other deferred credits and noncurrent liabilities		162	190
Total Deferred Credits and Other Noncurrent Liabilities		3,851	3,706
Commitments and Contingent Liabilities
Equity
Accumulated other comprehensive loss		(88)	(70)
Member's Equity		4,563	4,667
Total Liabilities and Equity		14,802	14,371
Louisville Gas And Electric Co [Member]
Current Assets
Cash and cash equivalents		15	5
Accounts receivable (less reserve:)
Customer		116	109
Other		13	11
Accounts receivable from affiliates		24	28
Unbilled revenues		91	75
Fuel, materials and supplies		131	143
Prepayments		11	12
Regulatory assets		12	9
Other current assets		3	1
Total Current Assets		416	393
Property, Plant and Equipment
Regulated utility plant		5,587	5,357
Less: accumulated depreciation - regulated utility plant		614	498
Regulated utility plant, net		4,973	4,859
Construction work in progress		305	133
Property, Plant and Equipment, net		5,278	4,992
Other Noncurrent Assets
Regulatory assets		411	450
Goodwill		389	389
Other intangibles		53	59
Other noncurrent assets		12	17
Total Other Noncurrent Assets		865	915
Total Assets		6,559	6,300
Current Liabilities
Short-term debt		199	169
Long-term debt due within one year		98	194
Accounts payable		179	148
Accounts payable to affiliates		23	26
Taxes		25	40
Interest		11	11
Asset Retirement Obligations		24	41
Price risk management liabilities		4	4
Customer deposits		27	27
Regulatory liabilities		3	5
Other current liabilities		52	36
Total Current Liabilities		645	701
Long-term Debt [Abstract]
Long-term Debt		1,611	1,423
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		572	974
Investment tax credits		35	36
Price risk management liabilities		22	27
Accrued pension obligations		45	53
Asset retirement obligations		97	104
Regulatory liabilities		919	419
Other deferred credits and noncurrent liabilities		86	87
Total Deferred Credits and Other Noncurrent Liabilities		1,776	1,700
Commitments and Contingent Liabilities
Equity
Common stock	[3]	424	424
Additional paid-in capital		1,712	1,682
Earnings reinvested		391	370
Total Equity		2,527	2,476
Total Liabilities and Equity		6,559	6,300
Kentucky Utilities Co [Member]
Current Assets
Cash and cash equivalents		15	7
Accounts receivable (less reserve:)
Customer		130	126
Other		30	5
Unbilled revenues		112	95
Fuel, materials and supplies		123	154
Prepayments		14	12
Regulatory assets		6	11
Other current assets		5	3
Total Current Assets		435	413
Property, Plant and Equipment
Regulated utility plant		7,592	7,382
Less: accumulated depreciation - regulated utility plant		1,170	965
Regulated utility plant, net		6,422	6,417
Construction work in progress		321	181
Property, Plant and Equipment, net		6,743	6,598
Other Noncurrent Assets
Regulatory assets		384	374
Goodwill		607	607
Other intangibles		33	36
Other noncurrent assets		52	57
Total Other Noncurrent Assets		1,076	1,074
Total Assets		8,254	8,085
Current Liabilities
Short-term debt		45	16
Long-term debt due within one year		0	0
Accounts payable		137	78
Accounts payable to affiliates		53	56
Taxes		19	45
Interest		16	16
Asset Retirement Obligations		61	19
Customer deposits		31	29
Regulatory liabilities		6	13
Other current liabilities		46	36
Total Current Liabilities		414	308
Long-term Debt [Abstract]
Long-term Debt		2,328	2,327
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes		691	1,170
Investment tax credits		94	96
Accrued pension obligations		36	62
Asset retirement obligations		174	269
Regulatory liabilities		1,117	480
Other deferred credits and noncurrent liabilities		43	50
Total Deferred Credits and Other Noncurrent Liabilities		2,155	2,127
Commitments and Contingent Liabilities
Equity
Common stock	[4]	308	308
Additional paid-in capital		2,616	2,616
Earnings reinvested		433	400
Accumulated other comprehensive loss		0	(1)
Total Equity		3,357	3,323
Total Liabilities and Equity		$ 8,254	$ 8,085

[1] 1,560,000 shares authorized; 693,398 and 679,731 shares issued and outstanding at December 31, 2017 and December 31, 2016.

[2] 170,000 shares authorized; 66,368 shares issued and outstanding at December 31, 2017 and December 31, 2016

[3] 75,000 shares authorized; 21,294 shares issued and outstanding at December 31, 2017 and December 31, 2016.

[4] 80,000 shares authorized; 37,818 shares issued and outstanding at December 31, 2017 and December 31, 2016.