CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011
Cash Flows from Operating Activities
Net income	$ 816		$ 605
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Depreciation	535		446
Amortization	88		126
Defined benefit plans - expense	84		71
Deferred income taxes and investment tax credits	364		337
Unrealized (gains) losses on derivatives, and other hedging activities	(209)		(165)
Other	25		67
Change in current assets and current liabilities
Accounts receivable	21		(36)
Accounts payable	(126)		(60)
Unbilled revenues	72		194
Prepayments	(97)		111
Counterparty collateral	57		(258)
Taxes	29		(63)
Accrued interest	(87)		(9)
Other	(71)		36
Other operating activities
Defined benefit plans - funding	(493)		(550)
Other assets	(16)		(42)
Other liabilities	(45)		4
Net cash provided by (used in) operating activities	947		814
Cash Flows from Investing Activities
Expenditures for property, plant and equipment	(1,309)		(1,003)
Proceeds from the sale of certain non-core generation facilities	0		381
Ironwood Acquisition, net of cash acquired	(84)		0
Acquisition of WPD Midlands	0		(5,763)
Purchases of nuclear plant decommissioning trust investments	(85)		(107)
Proceeds from the sale of nuclear plant decommissioning trust investments	79		100
Proceeds from the sale of other investments	21		163
Net (increase) decrease in restricted cash and cash equivalents	54		(22)
Other investing activities	(29)		(48)
Net cash provided by (used in) investing activities	(1,353)		(6,299)
Cash Flows from Financing Activities
Issuance of long-term debt	575		4,350
Issuance of common stock	35		2,266
Payment of common stock dividends	(413)		(340)
Redemption of preference stock of a subsidiary	(250)		0
Net increase (decrease) in short-term debt	311		(321)
Other financing activities	(67)		(108)
Net cash provided by (used in) financing activities	191		5,847
Effect of Exchange Rates on Cash and Cash Equivalents	(6)		(18)
Net Increase (Decrease) in Cash and Cash Equivalents	(221)		344
Cash and Cash Equivalents at Beginning of Period	1,202		925
Cash and Cash Equivalents at End of Period	981		1,269
PPL Energy Supply LLC [Member]
Cash Flows from Operating Activities
Net income	328		303
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Depreciation	133		120
Amortization	57		50
Defined benefit plans - expense	22		17
Deferred income taxes and investment tax credits	165		186
Unrealized (gains) losses on derivatives, and other hedging activities	(216)		(163)
Other	28		29
Change in current assets and current liabilities
Accounts receivable	(2)		57
Accounts payable	(57)		(104)
Unbilled revenues	61		126
Fuel, materials and supplies	(74)		(26)
Counterparty collateral	57		(258)
Taxes	(58)		31
Other	(40)		(43)
Other operating activities
Defined benefit plans - funding	(69)		(137)
Other assets	(19)		(25)
Other liabilities	(8)		25
Net cash provided by (used in) operating activities	308		188
Cash Flows from Investing Activities
Expenditures for property, plant and equipment	(316)		(324)
Proceeds from the sale of certain non-core generation facilities	0		381
Ironwood Acquisition, net of cash acquired	(84)		0
Purchases of nuclear plant decommissioning trust investments	(85)		(107)
Proceeds from the sale of nuclear plant decommissioning trust investments	79		100
Net (increase) decrease in notes receivable from affiliates	198		(37)
Net (increase) decrease in restricted cash and cash equivalents	57		(14)
Other investing activities	(22)		(35)
Net cash provided by (used in) investing activities	(173)		(36)
Cash Flows from Financing Activities
Contributions from member	472		168
Distributions to member	(657)		(134)
Cash included in net assets of subsidiary distributed to member	0		(325)
Net increase (decrease) in short-term debt	120		(100)
Other financing activities	(3)		0
Net cash provided by (used in) financing activities	(68)		(391)
Net Increase (Decrease) in Cash and Cash Equivalents	67		(239)
Cash and Cash Equivalents at Beginning of Period	379		661
Cash and Cash Equivalents at End of Period	446		422
PPL Electric Utilities Corp [Member]
Cash Flows from Operating Activities
Net income	66	[1]	96	[1]
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Depreciation	78		70
Amortization	9		0
Defined benefit plans - expense	11		9
Deferred income taxes and investment tax credits	59		(19)
Other	5		2
Change in current assets and current liabilities
Accounts receivable	19		(48)
Accounts payable	(37)		(75)
Unbilled revenues	11		47
Prepayments	(18)		38
Regulatory assets and liabilities, net	(12)		63
Taxes	0		10
Other	(11)		(16)
Other operating activities
Defined benefit plans - funding	(54)		(102)
Other assets	2		(7)
Other liabilities	(27)		(5)
Net cash provided by (used in) operating activities	101		63
Cash Flows from Investing Activities
Expenditures for property, plant and equipment	(256)		(244)
Other investing activities	(1)		4
Net cash provided by (used in) investing activities	(257)		(240)
Cash Flows from Financing Activities
Payment of common stock dividends to parent	(56)		(52)
Redemption of preference stock of a subsidiary	(250)		0
Net increase (decrease) in notes payable to affiliates	0		37
Net increase (decrease) in short-term debt	195		0
Distributions on preference stock	(8)		(8)
Net cash provided by (used in) financing activities	(119)		(23)
Net Increase (Decrease) in Cash and Cash Equivalents	(275)		(200)
Cash and Cash Equivalents at Beginning of Period	320		204
Cash and Cash Equivalents at End of Period	45		4
LG And E And KU Energy LLC [Member]
Cash Flows from Operating Activities
Net income	97	[1]	128	[1]
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Depreciation	172		165
Amortization	14		13
Defined benefit plans - expense	20		25
Deferred income taxes and investment tax credits	56		146
Other	(2)		(15)
Change in current assets and current liabilities
Accounts receivable	(11)		17
Accounts payable	17		(20)
Unbilled revenues	1		38
Fuel, materials and supplies	1		42
Income tax receivable	2		40
Taxes	33		(6)
Other	(8)		(18)
Other operating activities
Defined benefit plans - funding	(62)		(157)
Other assets	0		(1)
Other liabilities	24		10
Net cash provided by (used in) operating activities	354		407
Cash Flows from Investing Activities
Expenditures for property, plant and equipment	(324)		(180)
Proceeds from the sale of other investments	0		163
Net (increase) decrease in notes receivable from affiliates	3		(29)
Net (increase) decrease in restricted cash and cash equivalents	(2)		(4)
Net cash provided by (used in) investing activities	(323)		(50)
Cash Flows from Financing Activities
Distributions to member	(60)		(146)
Net increase (decrease) in short-term debt	0		(163)
Debt issuance and credit facility costs	(1)		(3)
Net cash provided by (used in) financing activities	(61)		(312)
Net Increase (Decrease) in Cash and Cash Equivalents	(30)		45
Cash and Cash Equivalents at Beginning of Period	59		11
Cash and Cash Equivalents at End of Period	29		56
Louisville Gas And Electric Co [Member]
Cash Flows from Operating Activities
Net income	51	[1]	59	[1]
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Depreciation	76		73
Amortization	6		6
Defined benefit plans - expense	9		11
Deferred income taxes and investment tax credits	28		27
Other	(6)		0
Change in current assets and current liabilities
Accounts receivable	(11)		24
Accounts payable	11		(11)
Accounts payable to affiliates	(10)		(7)
Unbilled revenues	6		27
Fuel, materials and supplies	6		41
Other	19		(9)
Other operating activities
Defined benefit plans - funding	(25)		(67)
Other assets	(1)		0
Other liabilities	1		3
Net cash provided by (used in) operating activities	160		177
Cash Flows from Investing Activities
Expenditures for property, plant and equipment	(120)		(79)
Proceeds from the sale of other investments	0		163
Net (increase) decrease in notes receivable from affiliates	(6)		0
Net (increase) decrease in restricted cash and cash equivalents	(2)		(4)
Net cash provided by (used in) investing activities	(128)		80
Cash Flows from Financing Activities
Payment of common stock dividends to parent	(31)		(42)
Net increase (decrease) in notes payable to affiliates	0		(12)
Net increase (decrease) in short-term debt	0		(163)
Debt issuance and credit facility costs	(1)		(1)
Net cash provided by (used in) financing activities	(32)		(218)
Net Increase (Decrease) in Cash and Cash Equivalents	0		39
Cash and Cash Equivalents at Beginning of Period	25		2
Cash and Cash Equivalents at End of Period	25		41
Kentucky Utilities Co [Member]
Cash Flows from Operating Activities
Net income	68	[1]	88	[1]
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Depreciation	96		92
Amortization	7		6
Defined benefit plans - expense	5		7
Deferred income taxes and investment tax credits	53		49
Other	0		(10)
Change in current assets and current liabilities
Accounts receivable	(24)		15
Accounts payable	12		2
Accounts payable to affiliates	1		(19)
Unbilled revenues	(5)		11
Fuel, materials and supplies	(3)		1
Other	15		(15)
Other operating activities
Defined benefit plans - funding	(18)		(45)
Other assets	0		(1)
Other liabilities	10		4
Net cash provided by (used in) operating activities	217		185
Cash Flows from Investing Activities
Expenditures for property, plant and equipment	(203)		(101)
Net cash provided by (used in) investing activities	(203)		(101)
Cash Flows from Financing Activities
Payment of common stock dividends to parent	(48)		(68)
Net increase (decrease) in notes payable to affiliates	6		(10)
Debt issuance and credit facility costs	0		(2)
Net cash provided by (used in) financing activities	(42)		(80)
Net Increase (Decrease) in Cash and Cash Equivalents	(28)		4
Cash and Cash Equivalents at Beginning of Period	31		3
Cash and Cash Equivalents at End of Period	$ 3		$ 7

[1] Net income approximates comprehensive income.