Accumulated Other Comprehensive Income (Loss) (After-tax Changes by Component) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	$ (1,940)	$ (788)	$ (479)
Amounts arising during the period	323
Reclassifications from accumulated other comprehensive income	52
Net other comprehensive income during the period	375	(1,152)	(309)
Balance at end of period	(1,565)	(1,940)	(788)
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(149)	(243)	(195)
Amounts arising during the period	138
Reclassifications from accumulated other comprehensive income
Net other comprehensive income during the period	138	94	(48)
Balance at end of period	(11)	(149)	(243)
Available For Sale Securities Unrealized Gains (Losses) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	112	90	88
Amounts arising during the period	67
Reclassifications from accumulated other comprehensive income	(6)
Net other comprehensive income during the period	61	22	2
Balance at end of period	173	112	90
Qualifying Derivatives Unrealized Gains (Losses) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	132	527	695
Amounts arising during the period	45
Reclassifications from accumulated other comprehensive income	(83)
Net other comprehensive income during the period	(38)	(395)	(168)
Balance at end of period	94	132	527
Equity Investees Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	1	(1)	(4)
Amounts arising during the period
Reclassifications from accumulated other comprehensive income
Net other comprehensive income during the period		2	3
Balance at end of period	1	1	(1)
Defined Benefit Plans Prior Service Costs [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(14)	(25)	(32)
Amounts arising during the period	2
Reclassifications from accumulated other comprehensive income	6
Net other comprehensive income during the period	8	11	7
Balance at end of period	(6)	(14)	(25)
Defined Benefit Plans Actuarial Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(2,023)	(1,137)	(1,032)
Amounts arising during the period	71
Reclassifications from accumulated other comprehensive income	135
Net other comprehensive income during the period	206	(886)	(105)
Balance at end of period	(1,817)	(2,023)	(1,137)
Defined Benefit Plans Transition Assset Obligation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	1	1	1
Amounts arising during the period
Reclassifications from accumulated other comprehensive income
Net other comprehensive income during the period
Balance at end of period	1	1	1
PPL Energy Supply LLC [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	48	487	(355)
Amounts arising during the period	140
Distribution of membership interest In PPL Global			939
Reclassifications from accumulated other comprehensive income	(111)
Net other comprehensive income during the period	29	(439)	(97)
Balance at end of period	77	48	487
PPL Energy Supply LLC [Member] | Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period			(195)
Amounts arising during the period
Distribution of membership interest In PPL Global			195
Reclassifications from accumulated other comprehensive income
Net other comprehensive income during the period
Balance at end of period
PPL Energy Supply LLC [Member] | Available For Sale Securities Unrealized Gains (Losses) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	112	90	88
Amounts arising during the period	67
Distribution of membership interest In PPL Global
Reclassifications from accumulated other comprehensive income	(6)
Net other comprehensive income during the period	61	22	2
Balance at end of period	173	112	90
PPL Energy Supply LLC [Member] | Qualifying Derivatives Unrealized Gains (Losses) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	211	606	733
Amounts arising during the period
Distribution of membership interest In PPL Global			(41)
Reclassifications from accumulated other comprehensive income	(123)
Net other comprehensive income during the period	(123)	(395)	(86)
Balance at end of period	88	211	606
PPL Energy Supply LLC [Member] | Equity Investees Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period			(3)
Amounts arising during the period
Distribution of membership interest In PPL Global
Reclassifications from accumulated other comprehensive income
Net other comprehensive income during the period			3
Balance at end of period
PPL Energy Supply LLC [Member] | Defined Benefit Plans Prior Service Costs [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(10)	(16)	(23)
Amounts arising during the period	2
Distribution of membership interest In PPL Global			5
Reclassifications from accumulated other comprehensive income	4
Net other comprehensive income during the period	6	6	2
Balance at end of period	(4)	(10)	(16)
PPL Energy Supply LLC [Member] | Defined Benefit Plans Actuarial Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(265)	(193)	(955)
Amounts arising during the period	71
Distribution of membership interest In PPL Global			780
Reclassifications from accumulated other comprehensive income	14
Net other comprehensive income during the period	85	(72)	(18)
Balance at end of period	(180)	(265)	(193)
PPL Energy Supply LLC [Member] | Defined Benefit Plans Transition Assset Obligation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period
Amounts arising during the period
Distribution of membership interest In PPL Global
Reclassifications from accumulated other comprehensive income
Net other comprehensive income during the period
Balance at end of period
LG And E And KU Energy LLC [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(15)	4	6
Amounts arising during the period	28
Net other comprehensive income during the period	28	(19)	(2)
Balance at end of period	13	(15)	4
LG And E And KU Energy LLC [Member] | Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period
Amounts arising during the period
Net other comprehensive income during the period
Balance at end of period
LG And E And KU Energy LLC [Member] | Available For Sale Securities Unrealized Gains (Losses) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period
Amounts arising during the period
Net other comprehensive income during the period
Balance at end of period
LG And E And KU Energy LLC [Member] | Qualifying Derivatives Unrealized Gains (Losses) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period
Amounts arising during the period
Net other comprehensive income during the period
Balance at end of period
LG And E And KU Energy LLC [Member] | Equity Investees Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	1
Amounts arising during the period
Net other comprehensive income during the period		1
Balance at end of period	1	1
LG And E And KU Energy LLC [Member] | Defined Benefit Plans Prior Service Costs [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(2)	(2)
Amounts arising during the period
Net other comprehensive income during the period			(2)
Balance at end of period	(2)	(2)	(2)
LG And E And KU Energy LLC [Member] | Defined Benefit Plans Actuarial Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(14)	6	6
Amounts arising during the period	28
Net other comprehensive income during the period	28	(20)
Balance at end of period	14	(14)	6
LG And E And KU Energy LLC [Member] | Defined Benefit Plans Transition Assset Obligation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period
Amounts arising during the period
Net other comprehensive income during the period
Balance at end of period