Revenue from Contracts with Customers (Tables)

3 Months Ended

Mar. 31, 2019

Revenue from Contracts with Customers [Line Items]

Reconciliation of Revenue from Contracts with Customers [Table Text Block]

The following tables reconcile "Operating Revenues" included in each Registrant's Statement of Income with revenues generated from contracts with customers for the periods ended March 31.

	Three Months
	2019
	PPL			PPL Electric			LKE			LG&E			KU
Operating Revenues (a)	$	2,079		$	645		$	845		$	410		$	450
Revenues derived from:
Alternative revenue programs (b)	(6		)	(4		)	(2		)	(2		)	—
Other (c)	(10		)	(3		)	(4		)	(1		)	(3		)
Revenues from Contracts with Customers	$	2,063		$	638		$	839		$	407		$	447

	Three Months
	2018
	PPL			PPL Electric			LKE			LG&E			KU
Operating Revenues (a)	$	2,126		$	639		$	872		$	419		$	471
Revenues derived from:
Alternative revenue programs (b)	32			2			30			14			16
Other (c)	(16		)	(4		)	(5		)	(1		)	(4		)
Revenues from Contracts with Customers	$	2,142		$	637		$	897		$	432		$	483

(a) PPL includes $583 million and $615 million for the three months ended March 31, 2019 and 2018 of revenues from external customers reported by the U.K. Regulated segment. PPL Electric and LKE represent revenues from external customers reported by the Pennsylvania Regulated and Kentucky Regulated segments. See Note 3 for additional information.

(b) Alternative revenue programs for PPL Electric include the over/under-collection of its transmission formula rate. Alternative revenue programs for LKE, LG&E and KU include the over/under collection for the ECR and DSM programs as well as LG&E's over/under collection of its GLT program and KU's over/under collection of its generation formula rate. Over-collections of revenue are shown as positive amounts in the table above; under-collections are shown as negative amounts.

(c) Represents additional revenues outside the scope of revenues from contracts with customers such as leases and other miscellaneous revenues.

Disaggregation of Revenue [Table Text Block]

The following tables show revenues from contracts with customers disaggregated by customer class for the periods ended March 31.

	Three Months
	2019
	PPL		PPL Electric		LKE		LG&E		KU
Licensed energy suppliers (a)	$	556	$	—	$	—	$	—	$	—
Residential	778		407		371		189		182
Commercial	319		95		224		121		103
Industrial	150		17		133		44		89
Other (b)	114		14		70		33		37
Wholesale - municipal	28		—		28		—		28
Wholesale - other (c)	13		—		13		20		8
Transmission	105		105		—		—		—
Revenues from Contracts with Customers	$	2,063	$	638	$	839	$	407	$	447

	Three Months
	2018
	PPL		PPL Electric		LKE		LG&E		KU
Licensed energy suppliers (a)	$	584	$	—	$	—	$	—	$	—
Residential	804		408		396		197		199
Commercial	325		98		227		124		103
Industrial	155		13		142		44		98
Other (b)	105		13		68		31		37
Wholesale - municipal	30		—		30		—		30
Wholesale - other (c)	34		—		34		36		16
Transmission	105		105		—		—		—
Revenues from Contracts with Customers	$	2,142	$	637	$	897	$	432	$	483

(a) Represents customers of WPD.

(b) Primarily includes revenues from pole attachments, street lighting, other public authorities and other non-core businesses.

(c) Includes wholesale power and transmission revenues. LG&E and KU amounts include intercompany power sales and transmission revenues, which are eliminated upon consolidation at LKE.

Credit Loss Recognized from Contracts with Customers [Table Text Block]

The following table shows the accounts receivable balances that were impaired for the periods ended March 31.

	2019		2018
PPL	$	9	$	10
PPL Electric	6		7
LKE	2		2
LG&E	1		1
KU	1		1