Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2015

Asset Retirement Obligation [Line Items]

Asset Retirement Obligation Roll Forward

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

			PPL				LKE				LG&E				KU
			2015		2014		2015		2014		2015		2014		2015		2014
ARO at beginning of period			$	336	$	301	$	285	$	252	$	74	$	74	$	211	$	178
	Accretion			19		16		18		14		5		4		13		10
	Obligations incurred			5		1		5		1		3				2		1
	Changes in estimated cash flow
		or settlement date		235		25		234		23		98		1		136		22
	Effect of foreign currency
		exchange rates		(2)		(2)
	Obligations settled			(7)		(5)		(7)		(5)		(5)		(5)		(2)
ARO at end of period			$	586	$	336	$	535	$	285	$	175	$	74	$	360	$	211

LG And E And KU Energy LLC [Member]

Asset Retirement Obligation [Line Items]

Asset Retirement Obligation Roll Forward

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

			PPL				LKE				LG&E				KU
			2015		2014		2015		2014		2015		2014		2015		2014
ARO at beginning of period			$	336	$	301	$	285	$	252	$	74	$	74	$	211	$	178
	Accretion			19		16		18		14		5		4		13		10
	Obligations incurred			5		1		5		1		3				2		1
	Changes in estimated cash flow
		or settlement date		235		25		234		23		98		1		136		22
	Effect of foreign currency
		exchange rates		(2)		(2)
	Obligations settled			(7)		(5)		(7)		(5)		(5)		(5)		(2)
ARO at end of period			$	586	$	336	$	535	$	285	$	175	$	74	$	360	$	211

Louisville Gas And Electric Co [Member]

Asset Retirement Obligation [Line Items]

Asset Retirement Obligation Roll Forward

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

			PPL				LKE				LG&E				KU
			2015		2014		2015		2014		2015		2014		2015		2014
ARO at beginning of period			$	336	$	301	$	285	$	252	$	74	$	74	$	211	$	178
	Accretion			19		16		18		14		5		4		13		10
	Obligations incurred			5		1		5		1		3				2		1
	Changes in estimated cash flow
		or settlement date		235		25		234		23		98		1		136		22
	Effect of foreign currency
		exchange rates		(2)		(2)
	Obligations settled			(7)		(5)		(7)		(5)		(5)		(5)		(2)
ARO at end of period			$	586	$	336	$	535	$	285	$	175	$	74	$	360	$	211

Kentucky Utilities Co [Member]

Asset Retirement Obligation [Line Items]

Asset Retirement Obligation Roll Forward

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

			PPL				LKE				LG&E				KU
			2015		2014		2015		2014		2015		2014		2015		2014
ARO at beginning of period			$	336	$	301	$	285	$	252	$	74	$	74	$	211	$	178
	Accretion			19		16		18		14		5		4		13		10
	Obligations incurred			5		1		5		1		3				2		1
	Changes in estimated cash flow
		or settlement date		235		25		234		23		98		1		136		22
	Effect of foreign currency
		exchange rates		(2)		(2)
	Obligations settled			(7)		(5)		(7)		(5)		(5)		(5)		(2)
ARO at end of period			$	586	$	336	$	535	$	285	$	175	$	74	$	360	$	211