CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012
Current Assets
Cash and cash equivalents	$ 711		$ 901
Restricted cash and cash equivalents	84		54
Accounts receivable (less reserve:)
Customer	879		745
Other	129		79
Unbilled revenues	701		857
Fuel, materials and supplies	642		673
Prepayments	198		166
Price risk management assets	1,334		1,525
Regulatory assets	34		19
Other current assets	63		49
Total Current Assets	4,775		5,068
Investments
Nuclear plant decommissioning trust funds	771		712
Other investments	47		47
Total Investments	818		759
Property, Plant and Equipment
Regulated utility plant	25,620		25,196
Less: accumulated depreciation - regulated utility plant	4,424		4,164
Regulated utility plant, net	21,196		21,032
Non-regulated property, plant and equipment
Generation	11,594		11,295
Nuclear fuel	590		524
Other	758		726
Less: accumulated depreciation - non-regulated property, plant and equipment	6,063		5,942
Non-regulated property, plant and equipment, net	6,879		6,603
Construction work in progress	2,525		2,397
Property, Plant and Equipment, net	30,600	[1]	30,032	[1]
Assets, Noncurrent [Abstract]
Regulatory assets	1,443		1,483
Goodwill	3,991		4,158
Other intangibles	907		925
Price risk management assets	599		572
Other noncurrent assets	613		637
Total Other Noncurrent Assets	7,553		7,775
Total Assets	43,746		43,634
Current Liabilities
Short-term debt	1,206		652
Long-term debt due within one year	751		751
Accounts payable	1,114		1,252
Taxes	144		90
Interest	197		325
Dividends	218		210
Price risk management liabilities	887		1,065
Regulatory liabilities	54		61
Other current liabilities	971		1,219
Total Current Liabilities	5,542		5,625
Long-term Debt	18,875		18,725
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes	3,704		3,387
Investment tax credits	350		328
Price risk management liabilities	514		629
Accrued pension obligations	1,551		2,076
Asset retirement obligations	545		536
Regulatory liabilities	1,052		1,010
Other deferred credits and noncurrent liabilities	659		820
Total Deferred Credits and Other Noncurrent Liabilities	8,375		8,786
Commitments and Contingent Liabilities
Equity
Common stock	6	[2]	6	[2]
Additional paid-in capital	7,195		6,936
Earnings reinvested	5,863		5,478
Accumulated other comprehensive income (loss)	(2,128)		(1,940)
Total Stockholders' Equity	10,936		10,480
Noncontrolling Interests	18		18
Total Equity	10,954		10,498
Total Liabilities and Equity	43,746		43,634
PPL Energy Supply LLC [Member]
Current Assets
Cash and cash equivalents	265		413
Restricted cash and cash equivalents	70		46
Accounts receivable (less reserve:)
Customer	200		183
Other	95		31
Unbilled revenues	273		369
Accounts receivable from affiliates	53		125
Notes receivable from affiliates	4
Fuel, materials and supplies	322		327
Prepayments	63		15
Price risk management assets	1,146		1,511
Other current assets	22		10
Total Current Assets	2,513		3,030
Investments
Nuclear plant decommissioning trust funds	771		712
Other investments	41		41
Total Investments	812		753
Non-regulated property, plant and equipment
Generation	11,604		11,305
Nuclear fuel	590		524
Other	297		294
Less: accumulated depreciation - non-regulated property, plant and equipment	5,921		5,817
Non-regulated property, plant and equipment, net	6,570		6,306
Construction work in progress	704		987
Property, Plant and Equipment, net	7,274	[1]	7,293	[1]
Assets, Noncurrent [Abstract]
Goodwill	86		86
Other intangibles	259		252
Price risk management assets	508		557
Other noncurrent assets	369		404
Total Other Noncurrent Assets	1,222		1,299
Total Assets	11,821		12,375
Current Liabilities
Short-term debt	575		356
Long-term debt due within one year	741		751
Accounts payable	374		438
Accounts payable to affiliates			31
Taxes	13		62
Interest	31		31
Price risk management liabilities	879		1,010
Deferred income taxes	72		158
Other current liabilities	249		319
Total Current Liabilities	2,934		3,156
Long-term Debt	2,522		2,521
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes	1,368		1,232
Investment tax credits	211		186
Price risk management liabilities	472		556
Accrued pension obligations	198		293
Asset retirement obligations	374		365
Other deferred credits and noncurrent liabilities	183		218
Total Deferred Credits and Other Noncurrent Liabilities	2,806		2,850
Commitments and Contingent Liabilities
Equity
Accumulated other comprehensive income (loss)	14		48
Member's Equity	3,541		3,830
Noncontrolling Interests	18		18
Total Equity	3,559		3,848
Total Liabilities and Equity	11,821		12,375
PPL Electric Utilities Corp [Member]
Current Assets
Cash and cash equivalents	24		140
Accounts receivable (less reserve:)
Customer	316		249
Other	4		5
Unbilled revenues	74		110
Accounts receivable from affiliates	3		29
Fuel, materials and supplies	39		39
Prepayments	94		76
Deferred income taxes	45		45
Regulatory assets	5
Other current assets	18		4
Total Current Assets	617		697
Property, Plant and Equipment
Regulated utility plant	6,627		6,286
Less: accumulated depreciation - regulated utility plant	2,383		2,316
Regulated utility plant, net	4,244		3,970
Non-regulated property, plant and equipment
Other, net	2		2
Construction work in progress	444		370
Property, Plant and Equipment, net	4,690		4,342
Assets, Noncurrent [Abstract]
Regulatory assets	862		853
Other intangibles	181		171
Other noncurrent assets	35		55
Total Other Noncurrent Assets	1,078		1,079
Total Assets	6,385		6,118
Current Liabilities
Short-term debt	85
Long-term debt due within one year	10
Accounts payable	242		259
Accounts payable to affiliates	43		63
Taxes	20		12
Interest	26		26
Regulatory liabilities	48		52
Other current liabilities	89		93
Total Current Liabilities	563		505
Long-term Debt	1,957		1,967
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes	1,307		1,233
Investment tax credits	3		3
Accrued pension obligations	154		237
Regulatory liabilities	13		8
Other deferred credits and noncurrent liabilities	78		103
Total Deferred Credits and Other Noncurrent Liabilities	1,555		1,584
Commitments and Contingent Liabilities
Equity
Common stock	364	[3]	364	[3]
Additional paid-in capital	1,340		1,135
Earnings reinvested	606		563
Total Stockholders' Equity	2,310		2,062
Total Liabilities and Equity	6,385		6,118
LG And E And KU Energy LLC [Member]
Current Assets
Cash and cash equivalents	23		43
Accounts receivable (less reserve:)
Customer	202		133
Other	21		20
Unbilled revenues	158		156
Accounts receivable from affiliates			1
Fuel, materials and supplies	251		276
Prepayments	24		28
Price risk management assets from affiliates	72		14
Deferred income taxes	11		13
Regulatory assets	29		19
Other current assets	6		4
Total Current Assets	797		707
Property, Plant and Equipment
Regulated utility plant	8,232		8,073
Less: accumulated depreciation - regulated utility plant	647		519
Regulated utility plant, net	7,585		7,554
Non-regulated property, plant and equipment
Other, net	3		3
Construction work in progress	1,113		750
Property, Plant and Equipment, net	8,701		8,307
Assets, Noncurrent [Abstract]
Regulatory assets	581		630
Goodwill	996		996
Other intangibles	245		271
Other noncurrent assets	98		108
Total Other Noncurrent Assets	1,920		2,005
Total Assets	11,418		11,019
Current Liabilities
Short-term debt	252		125
Notes payable with affiliates	72		25
Accounts payable	301		283
Accounts payable to affiliates	1		1
Customer deposits	49		48
Taxes	26		26
Interest	21		21
Price risk management liabilities	4		5
Regulatory liabilities	6		9
Other current liabilities	104		100
Total Current Liabilities	836		643
Long-term Debt	4,075		4,075
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes	637		541
Investment tax credits	137		138
Price risk management liabilities	39		53
Accrued pension obligations	266		414
Asset retirement obligations	127		125
Regulatory liabilities	1,039		1,002
Other deferred credits and noncurrent liabilities	240		242
Total Deferred Credits and Other Noncurrent Liabilities	2,485		2,515
Commitments and Contingent Liabilities
Equity
Member's Equity	4,022		3,786
Total Liabilities and Equity	11,418		11,019
Louisville Gas And Electric Co [Member]
Current Assets
Cash and cash equivalents	13		22
Accounts receivable (less reserve:)
Customer	84		59
Other	9		16
Unbilled revenues	70		72
Accounts receivable from affiliates	8		14
Fuel, materials and supplies	117		142
Prepayments	7		7
Price risk management assets from affiliates	36		7
Regulatory assets	21		19
Other current assets	1		1
Total Current Assets	366		359
Property, Plant and Equipment
Regulated utility plant	3,279		3,187
Less: accumulated depreciation - regulated utility plant	282		220
Regulated utility plant, net	2,997		2,967
Non-regulated property, plant and equipment
Construction work in progress	407		259
Property, Plant and Equipment, net	3,404		3,226
Assets, Noncurrent [Abstract]
Regulatory assets	369		400
Goodwill	389		389
Other intangibles	132		144
Other noncurrent assets	34		44
Total Other Noncurrent Assets	924		977
Total Assets	4,694		4,562
Current Liabilities
Short-term debt	80		55
Accounts payable	146		117
Accounts payable to affiliates	21		23
Customer deposits	24		23
Taxes	14		2
Interest	5		5
Price risk management liabilities	4		5
Regulatory liabilities	5		4
Other current liabilities	40		34
Total Current Liabilities	339		268
Long-term Debt	1,112		1,112
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes	567		544
Investment tax credits	39		40
Price risk management liabilities	39		53
Accrued pension obligations	57		102
Asset retirement obligations	57		56
Regulatory liabilities	488		471
Other deferred credits and noncurrent liabilities	107		106
Total Deferred Credits and Other Noncurrent Liabilities	1,354		1,372
Commitments and Contingent Liabilities
Equity
Common stock	424	[4]	424	[4]
Additional paid-in capital	1,332		1,278
Earnings reinvested	133		108
Total Stockholders' Equity	1,889		1,810
Total Liabilities and Equity	4,694		4,562
Kentucky Utilities Co [Member]
Current Assets
Cash and cash equivalents	10		21
Accounts receivable (less reserve:)
Customer	118		74
Other	11		13
Unbilled revenues	88		84
Accounts receivable from affiliates	9		7
Fuel, materials and supplies	134		134
Prepayments	7		10
Price risk management assets from affiliates	36		7
Deferred income taxes	2		3
Regulatory assets	8
Other current assets	5		3
Total Current Assets	428		356
Property, Plant and Equipment
Regulated utility plant	4,953		4,886
Less: accumulated depreciation - regulated utility plant	365		299
Regulated utility plant, net	4,588		4,587
Non-regulated property, plant and equipment
Other, net	1		1
Construction work in progress	704		490
Property, Plant and Equipment, net	5,293		5,078
Assets, Noncurrent [Abstract]
Regulatory assets	212		230
Goodwill	607		607
Other intangibles	113		127
Other noncurrent assets	57		57
Total Other Noncurrent Assets	989		1,021
Total Assets	6,710		6,455
Current Liabilities
Short-term debt	172		70
Accounts payable	146		147
Accounts payable to affiliates	26		33
Customer deposits	25		25
Taxes	16		26
Interest	10		10
Regulatory liabilities	1		5
Other current liabilities	37		33
Total Current Liabilities	433		349
Long-term Debt	1,842		1,842
Deferred Credits and Other Noncurrent Liabilities
Deferred income taxes	657		587
Investment tax credits	98		98
Accrued pension obligations	45		104
Asset retirement obligations	70		69
Regulatory liabilities	551		531
Other deferred credits and noncurrent liabilities	86		92
Total Deferred Credits and Other Noncurrent Liabilities	1,507		1,481
Commitments and Contingent Liabilities
Equity
Common stock	308	[5]	308	[5]
Additional paid-in capital	2,440		2,348
Earnings reinvested	179		126
Accumulated other comprehensive income (loss)	1		1
Total Stockholders' Equity	2,928		2,783
Total Liabilities and Equity	$ 6,710		$ 6,455

[1] At June 30, 2013 and December 31, 2012, includes $416 million and $428 million of PP&E, consisting primarily of "Generation," including leasehold improvements from the consolidation of a VIE that is the owner/lessor of the Lower Mt. Bethel plant.

[2] 780,000 shares authorized; 591,622 and 581,944 shares issued and outstanding at June 30, 2013 and December 31, 2012.

[3] 170,000 shares authorized; 66,368 shares issued and outstanding at June 30, 2013 and December 31, 2012.

[4] 75,000 shares authorized; 21,294 shares issued and outstanding at June 30, 2013 and December 31, 2012.

[5] 80,000 shares authorized; 37,818 shares issued and outstanding at June 30, 2013 and December 31, 2012.