CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Cash Flows from Operating Activities
Net income (loss)	$ 1,737		$ 1,131		$ 1,531
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Depreciation	1,237		1,161		1,100
Amortization	228		222		186
Defined benefit plans - expense	90		176		166
Deferred income taxes and investment tax credits	640		72		424
Unrealized (gains) losses on derivatives, and other hedging activities	(175)		236		27
Adjustment to WPD line loss accrual	65		45		(90)
Stock compensation expense	64		51		49
Pre-tax gain from the sale of the Montana hydroelectric generation business	(246)		0		0
Loss on lease termination	0		426		0
Other	57		49		31
Change in current assets and current liabilities
Accounts receivable	(83)		(165)		7
Accounts payable	(4)		25		(29)
Unbilled revenues	90		27		(19)
Fuel, materials and supplies	(134)		(27)		(18)
Counterparty collateral	(17)		(81)		(34)
Taxes payable	158		20		24
Uncertain tax positions	0		(114)		(4)
Other	80		(35)		55
Other operating activities
Defined benefit plans - funding	(419)		(563)		(607)
Other assets	12		7		(33)
Other liabilities	23		194		(2)
Net cash provided by (used in) operating activities	3,403		2,857		2,764
Cash Flows from Investing Activities
Expenditures for property, plant and equipment	(4,090)		(4,212)		(3,105)
Proceeds from the sale of the Montana hydroelectric generation business	900		0		0
Ironwood Acquisition, net of cash acquired	0		0		(84)
Expenditures for intangible assets	(95)		(95)		(71)
Purchases of nuclear plant decommissioning trust investments	(170)		(159)		(154)
Proceeds from the sale of nuclear plant decommissioning trust investments	154	[1]	144	[1]	139	[1]
Proceeds from receipt of grants	164		4		4
Purchases of other investments	(120)		0		0
Net (increase) decrease in restricted cash and cash equivalents	(89)		(20)		96
Other investing activities	17		43		52
Net cash provided by (used in) investing activities	(3,329)		(4,295)		(3,123)
Cash Flows from Financing Activities
Issuance of long-term debt	296		2,038		1,223
Retirement of long-term debt	(546)		(747)		(108)
Repurchase of common stock	0		(74)		0
Issuance of common stock	1,074		1,411		72
Payment of common stock dividends	(967)		(878)		(833)
Redemption of preference stock of a subsidiary	0		0		(250)
Debt issuance and credit facility costs	(22)		(49)		(17)
Contract adjustment payments on Equity Units	(22)		(82)		(94)
Net increase (decrease) in short-term debt	777		49		74
Other financing activities	(7)		(37)		(19)
Net cash provided by (used in) financing activities	583		1,631		48
Effect of Exchange Rates on Cash and Cash Equivalents	(8)		8		10
Net Increase (Decrease) in Cash and Cash Equivalents	649		201		(301)
Cash and Cash Equivalents at Beginning of Period	1,102		901		1,202
Cash and Cash Equivalents at End of Period	1,751		1,102		901
Supplemental Disclosures of Cash Flow Information:
Interest - net of amount capitalized	959		916		847
Income taxes - net	190		128		73
PPL Energy Supply LLC [Member]
Cash Flows from Operating Activities
Net income (loss)	410		(229)		475
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Depreciation	313		318		285
Amortization	163		156		119
Defined benefit plans - expense	42		51		43
Deferred income taxes and investment tax credits	(26)		(296)		152
Impairment of assets	20		65		3
Unrealized (gains) losses on derivatives, and other hedging activities	4		171		(41)
Pre-tax gain from the sale of the Montana hydroelectric generation business	(315)		0		0
Loss on lease termination	0		426		0
Other	36		2		19
Change in current assets and current liabilities
Accounts receivable	17		23		(54)
Accounts payable	2		(56)		(22)
Unbilled revenues	68		83		33
Fuel, materials and supplies	(97)		(31)		(29)
Prepayments	(53)		(5)		(1)
Counterparty collateral	(17)		(81)		(34)
Price risk management assets and liabilities	(30)		7		(21)
Taxes payable	(3)		(31)		(27)
Other	(40)		(16)		(17)
Other operating activities
Defined benefit plans - funding	(35)		(113)		(75)
Other assets	3		(4)		(41)
Other liabilities	0		(30)		17
Net cash provided by (used in) operating activities	462		410		784
Cash Flows from Investing Activities
Expenditures for property, plant and equipment	(416)		(583)		(648)
Proceeds from the sale of the Montana hydroelectric generation business	900		0		0
Ironwood Acquisition, net of cash acquired	0		0		(84)
Expenditures for intangible assets	(46)		(42)		(45)
Purchases of nuclear plant decommissioning trust investments	(170)		(159)		(154)
Proceeds from the sale of nuclear plant decommissioning trust investments	154	[1]	144	[1]	139	[1]
Proceeds from receipt of grants	164		3		0
Net (increase) decrease in notes receivable from affiliates	0		0		198
Net (increase) decrease in restricted cash and cash equivalents	(108)		(22)		104
Other investing activities	19		28		21
Net cash provided by (used in) investing activities	497		(631)		(469)
Cash Flows from Financing Activities
Retirement of long-term debt	(309)		(747)		(9)
Contributions from member	739		1,577		563
Distributions to member	(1,906)		(408)		(787)
Net increase (decrease) in short-term debt	630		(356)		(44)
Other financing activities	0		(19)		(4)
Net cash provided by (used in) financing activities	(846)		47		(281)
Net Increase (Decrease) in Cash and Cash Equivalents	113		(174)		34
Cash and Cash Equivalents at Beginning of Period	239		413		379
Cash and Cash Equivalents at End of Period	352		239		413
Supplemental Disclosures of Cash Flow Information:
Interest - net of amount capitalized	122		157		150
Income taxes - net	310		189		128
PPL Electric Utilities Corp [Member]
Cash Flows from Operating Activities
Net income (loss)	263	[2]	209	[2]	136	[2]
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Depreciation	185		178		160
Amortization	19		19		18
Defined benefit plans - expense	15		21		22
Deferred income taxes and investment tax credits	87		127		114
Other	(23)		(9)		(9)
Change in current assets and current liabilities
Accounts receivable	(64)		(29)		3
Accounts payable	30		12		38
Prepayments	1		36		2
Taxes payable	75		49		12
Other	18		(15)		(14)
Other operating activities
Defined benefit plans - funding	(23)		(93)		(59)
Other assets	19		8		(3)
Other liabilities	11		10		(31)
Net cash provided by (used in) operating activities	613		523		389
Cash Flows from Investing Activities
Expenditures for property, plant and equipment	(931)		(903)		(624)
Expenditures for intangible assets	(26)		(39)		(9)
Net (increase) decrease in notes receivable from affiliates	150		(150)		0
Other investing activities	16		12		20
Net cash provided by (used in) investing activities	(791)		(1,080)		(613)
Cash Flows from Financing Activities
Issuance of long-term debt	296		348		249
Retirement of long-term debt	(10)		0		0
Contributions from parent	263		205		150
Redemption of preference stock of a subsidiary	0		0		(250)
Payment of common stock dividends to parent	(158)		(127)		(95)
Net increase (decrease) in short-term debt	(20)		20		0
Other financing activities	(4)		(4)		(10)
Net cash provided by (used in) financing activities	367		442		44
Net Increase (Decrease) in Cash and Cash Equivalents	189		(115)		(180)
Cash and Cash Equivalents at Beginning of Period	25		140		320
Cash and Cash Equivalents at End of Period	214		25		140
Supplemental Disclosures of Cash Flow Information:
Interest - net of amount capitalized	110		87		81
Income taxes - net	40		(45)		(42)
LG And E And KU Energy LLC [Member]
Cash Flows from Operating Activities
Net income (loss)	344		347		219
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Depreciation	354		334		346
Amortization	25		22		27
Defined benefit plans - expense	25		48		40
Deferred income taxes and investment tax credits	449		254		133
Impairment of assets	0		0		25
Other	16		5		2
Change in current assets and current liabilities
Accounts receivable	(20)		(91)		(9)
Accounts payable	12		40		1
Accounts payable to affiliates	(1)		1		(1)
Unbilled revenues	13		(24)		(10)
Fuel, materials and supplies	(32)		(1)		8
Income tax receivable	(136)		1		2
Taxes payable	(3)		13		1
Other	(1)		22		0
Other operating activities
Defined benefit plans - funding	(45)		(168)		(70)
Settlement of interest rate swaps	0		86		0
Other assets	(7)		9		(8)
Other liabilities	6		22		38
Net cash provided by (used in) operating activities	999		920		744
Cash Flows from Investing Activities
Expenditures for property, plant and equipment	(1,262)		(1,434)		(768)
Net (increase) decrease in notes receivable from affiliates	70		(70)		15
Other investing activities	1		2		0
Net cash provided by (used in) investing activities	(1,191)		(1,502)		(753)
Cash Flows from Financing Activities
Issuance of long-term debt	0		496		0
Contributions from member	248		243		0
Distributions to member	(436)		(254)		(155)
Debt issuance and credit facility costs	(5)		(6)		(2)
Net increase (decrease) in notes payable to affiliates	41		(25)		25
Net increase (decrease) in short-term debt	330		120		125
Net cash provided by (used in) financing activities	178		574		(7)
Net Increase (Decrease) in Cash and Cash Equivalents	(14)		(8)		(16)
Cash and Cash Equivalents at Beginning of Period	35		43		59
Cash and Cash Equivalents at End of Period	21		35		43
Supplemental Disclosures of Cash Flow Information:
Interest - net of amount capitalized	157		137		139
Income taxes - net	(75)		(67)		(45)
Louisville Gas And Electric Co [Member]
Cash Flows from Operating Activities
Net income (loss)	169	[3]	163	[3]	123	[3]
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Depreciation	157		148		152
Amortization	12		6		11
Defined benefit plans - expense	9		18		18
Deferred income taxes and investment tax credits	118		26		69
Other	2		9		(13)
Change in current assets and current liabilities
Accounts receivable	(35)		(23)		(2)
Accounts payable	25		16		0
Accounts payable to affiliates	(4)		1		(3)
Unbilled revenues	9		(13)		(7)
Fuel, materials and supplies	(8)		(12)		0
Income tax receivable	(74)		0		0
Taxes payable	8		9		(7)
Other	0		8		(7)
Other operating activities
Defined benefit plans - funding	(13)		(48)		(27)
Settlement of interest rate swaps	0		43		0
Other assets	(2)		9		(24)
Other liabilities	(2)		6		22
Net cash provided by (used in) operating activities	371		366		305
Cash Flows from Investing Activities
Expenditures for property, plant and equipment	(656)		(577)		(286)
Net cash provided by (used in) investing activities	(656)		(577)		(286)
Cash Flows from Financing Activities
Issuance of long-term debt	0		248		0
Contributions from parent	157		86		0
Payment of common stock dividends to parent	(112)		(99)		(75)
Debt issuance and credit facility costs	(2)		(3)		(2)
Net increase (decrease) in short-term debt	244		(35)		55
Net cash provided by (used in) financing activities	287		197		(22)
Net Increase (Decrease) in Cash and Cash Equivalents	2		(14)		(3)
Cash and Cash Equivalents at Beginning of Period	8		22		25
Cash and Cash Equivalents at End of Period	10		8		22
Supplemental Disclosures of Cash Flow Information:
Interest - net of amount capitalized	46		36		39
Income taxes - net	65		51		5
Kentucky Utilities Co [Member]
Cash Flows from Operating Activities
Net income (loss)	220	[2]	228	[2]	137	[2]
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Depreciation	197		186		193
Amortization	11		14		14
Defined benefit plans - expense	5		18		11
Deferred income taxes and investment tax credits	224		69		99
Impairment of assets	0		0		25
Other	13		(3)		10
Change in current assets and current liabilities
Accounts receivable	(9)		(37)		(17)
Accounts payable	(10)		23		1
Accounts payable to affiliates	22		(8)		0
Unbilled revenues	4		(11)		(3)
Fuel, materials and supplies	(25)		10		7
Income tax receivable	(60)		0		0
Taxes payable	(19)		7		15
Other	(5)		10		6
Other operating activities
Defined benefit plans - funding	(5)		(65)		(21)
Settlement of interest rate swaps	0		43		0
Other assets	(4)		1		(3)
Other liabilities	7		10		26
Net cash provided by (used in) operating activities	566		495		500
Cash Flows from Investing Activities
Expenditures for property, plant and equipment	(604)		(855)		(480)
Other investing activities	1		2		0
Net cash provided by (used in) investing activities	(603)		(853)		(480)
Cash Flows from Financing Activities
Issuance of long-term debt	0		248		0
Contributions from parent	91		157		0
Payment of common stock dividends to parent	(148)		(124)		(100)
Debt issuance and credit facility costs	(2)		(3)		0
Net increase (decrease) in short-term debt	86		80		70
Net cash provided by (used in) financing activities	27		358		(30)
Net Increase (Decrease) in Cash and Cash Equivalents	(10)		0		(10)
Cash and Cash Equivalents at Beginning of Period	21		21		31
Cash and Cash Equivalents at End of Period	11		21		21
Supplemental Disclosures of Cash Flow Information:
Interest - net of amount capitalized	73		61		62
Income taxes - net	$ 0		$ 47		$ (39)

[1] These proceeds are used to pay income taxes and fees related to managing the trust. Remaining proceeds are reinvested in the trust.

[2] Net income approximates comprehensive income.

[3] Net income equals comprehensive income.