Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2013

Asset Retirement Obligations [Line Items]

Asset Retirement Obligation Roll Forward

The changes in the carrying amounts of AROs were as follows.

		PPL				PPL Energy Supply
		2013		2012		2013		2012
ARO at beginning of period		$	552	$	497	$	375	$	359
	Accretion expense		38		36		29		28
	Obligations incurred		6		9		6		3
	Changes in estimated cash flow or settlement date		123		31		1		(7)
	Effect of foreign currency exchange rates		1		1
	Obligations settled		(15)		(22)		(7)		(8)
ARO at end of period		$	705	$	552	$	404	$	375

			LKE				LG&E				KU
			2013		2012		2013		2012		2013		2012
ARO at beginning of period			$	131	$	118	$	62	$	57	$	69	$	61
	Accretion expense			7		6		3		3		4		3
	Obligations incurred					6								6
	Changes in estimated cash flow
		or settlement date		122		15		17		5		105		10
	Obligations settled			(8)		(14)		(8)		(3)				(11)
ARO at end of period			$	252	$	131	$	74	$	62	$	178	$	69

PPL Energy Supply LLC [Member]

Asset Retirement Obligations [Line Items]

Asset Retirement Obligation Roll Forward

The changes in the carrying amounts of AROs were as follows.

		PPL				PPL Energy Supply
		2013		2012		2013		2012
ARO at beginning of period		$	552	$	497	$	375	$	359
	Accretion expense		38		36		29		28
	Obligations incurred		6		9		6		3
	Changes in estimated cash flow or settlement date		123		31		1		(7)
	Effect of foreign currency exchange rates		1		1
	Obligations settled		(15)		(22)		(7)		(8)
ARO at end of period		$	705	$	552	$	404	$	375

			LKE				LG&E				KU
			2013		2012		2013		2012		2013		2012
ARO at beginning of period			$	131	$	118	$	62	$	57	$	69	$	61
	Accretion expense			7		6		3		3		4		3
	Obligations incurred					6								6
	Changes in estimated cash flow
		or settlement date		122		15		17		5		105		10
	Obligations settled			(8)		(14)		(8)		(3)				(11)
ARO at end of period			$	252	$	131	$	74	$	62	$	178	$	69

LG And E And KU Energy LLC [Member]

Asset Retirement Obligations [Line Items]

Asset Retirement Obligation Roll Forward

The changes in the carrying amounts of AROs were as follows.

		PPL				PPL Energy Supply
		2013		2012		2013		2012
ARO at beginning of period		$	552	$	497	$	375	$	359
	Accretion expense		38		36		29		28
	Obligations incurred		6		9		6		3
	Changes in estimated cash flow or settlement date		123		31		1		(7)
	Effect of foreign currency exchange rates		1		1
	Obligations settled		(15)		(22)		(7)		(8)
ARO at end of period		$	705	$	552	$	404	$	375

			LKE				LG&E				KU
			2013		2012		2013		2012		2013		2012
ARO at beginning of period			$	131	$	118	$	62	$	57	$	69	$	61
	Accretion expense			7		6		3		3		4		3
	Obligations incurred					6								6
	Changes in estimated cash flow
		or settlement date		122		15		17		5		105		10
	Obligations settled			(8)		(14)		(8)		(3)				(11)
ARO at end of period			$	252	$	131	$	74	$	62	$	178	$	69

Louisville Gas And Electric Co [Member]

Asset Retirement Obligations [Line Items]

Asset Retirement Obligation Roll Forward

The changes in the carrying amounts of AROs were as follows.

		PPL				PPL Energy Supply
		2013		2012		2013		2012
ARO at beginning of period		$	552	$	497	$	375	$	359
	Accretion expense		38		36		29		28
	Obligations incurred		6		9		6		3
	Changes in estimated cash flow or settlement date		123		31		1		(7)
	Effect of foreign currency exchange rates		1		1
	Obligations settled		(15)		(22)		(7)		(8)
ARO at end of period		$	705	$	552	$	404	$	375

			LKE				LG&E				KU
			2013		2012		2013		2012		2013		2012
ARO at beginning of period			$	131	$	118	$	62	$	57	$	69	$	61
	Accretion expense			7		6		3		3		4		3
	Obligations incurred					6								6
	Changes in estimated cash flow
		or settlement date		122		15		17		5		105		10
	Obligations settled			(8)		(14)		(8)		(3)				(11)
ARO at end of period			$	252	$	131	$	74	$	62	$	178	$	69

Kentucky Utilities Co [Member]

Asset Retirement Obligations [Line Items]

Asset Retirement Obligation Roll Forward

The changes in the carrying amounts of AROs were as follows.

		PPL				PPL Energy Supply
		2013		2012		2013		2012
ARO at beginning of period		$	552	$	497	$	375	$	359
	Accretion expense		38		36		29		28
	Obligations incurred		6		9		6		3
	Changes in estimated cash flow or settlement date		123		31		1		(7)
	Effect of foreign currency exchange rates		1		1
	Obligations settled		(15)		(22)		(7)		(8)
ARO at end of period		$	705	$	552	$	404	$	375

			LKE				LG&E				KU
			2013		2012		2013		2012		2013		2012
ARO at beginning of period			$	131	$	118	$	62	$	57	$	69	$	61
	Accretion expense			7		6		3		3		4		3
	Obligations incurred					6								6
	Changes in estimated cash flow
		or settlement date		122		15		17		5		105		10
	Obligations settled			(8)		(14)		(8)		(3)				(11)
ARO at end of period			$	252	$	131	$	74	$	62	$	178	$	69