Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

Summary of Significant Accounting Policies [Line Items]

Weighted-average Rates of Depreciation

Following are the weighted-average annual rates of depreciation, for regulated utility plant, for the years ended December 31:

	2020		2019		2018
PPL	2.81	%	2.84	%	2.77	%
PPL Electric	2.99	%	3.05	%	3.01	%
LKE	4.00	%	3.96	%	3.69	%
LG&E	4.00	%	3.87	%	3.63	%
KU	4.00	%	4.02	%	3.74	%

Schedule of Utility Inventory

"Fuel, materials and supplies" on the Balance Sheets consisted of the following at December 31:

	2020
	PPL		PPL Electric		LKE		LG&E		KU
Fuel	$	95	$	—	$	95	$	38	$	57
Natural gas stored underground	30		—		30		30		—
Materials and supplies	236		59		117		51		66
Total	$	361	$	59	$	242	$	119	$	123

	2019
	PPL		PPL Electric		LKE		LG&E		KU
Fuel	$	106	$	—	$	106	$	43	$	63
Natural gas stored underground	35		—		35		35		—
Materials and supplies	191		33		109		44		65
Total	$	332	$	33	$	250	$	122	$	128

Reconciliation of Cash, Cash Equivalents and Restricted Cash from the Balance Sheet to Cash Flow

The following provides a reconciliation of Cash, Cash Equivalents and Restricted Cash reported within the Balance Sheets to the amounts shown on the Statements of Cash Flows:

	PPL				PPL Electric
	December 31, 2020		December 31, 2019		December 31, 2020		December 31, 2019
Cash and cash equivalents	$	708	$	815	$	40	$	262
Restricted cash - current	1		3		—		2
Restricted cash - noncurrent (a)	18		18		—		—
Total Cash, Cash Equivalents and Restricted Cash	$	727	$	836	$	40	$	264

(a)Bank deposits and other cash equivalents that are restricted by agreement or that have been clearly designated for a specific purpose are classified as restricted cash. On the Balance Sheets, the current portion of restricted cash is included in "Other current assets," while the noncurrent portion is included in "Other noncurrent assets."

Accounts Receivable, Allowance for Credit Loss

The changes in the allowance for doubtful accounts are included in the following table. Amounts relate to “accounts receivable-customer” except as noted.

				Additions
	Balance at Beginning of Period			Charged to Income		Charged to Other Accounts		Deductions (b)		Balance at End of Period
PPL
2020 (a)	$	60	(a)	$	31	$	—	$	16	$	75	(c) (d)
2019	56			37		3		38		58
2018	51			41		3		39		56
PPL Electric
2020	$	30	(a)	$	19	$	—	$	8	$	41	(c)
2019	27			26		—		25		28
2018	24			29		—		26		27
LKE
2020	$	28		$	9	$	—	$	5	$	32	(d)
2019	27			8		3		10		28
2018	25			10		3		11		27
LG&E
2020	$	1		$	4	$	—	$	2	$	3
2019	1			2		2		4		1
2018	1			4		1		5		1
KU
2020	$	1		$	4	$	—	$	3	$	2
2019	2			4		1		6		1
2018	1			5		2		6		2

(a)Adjusted for $2 million cumulative-effect adjustment upon adoption of current expected credit loss guidance.

(b)Primarily related to uncollectible accounts written off.

(c)Includes $3 million related to other receivables.

(d)Includes $27 million related to other receivables.

PPL Electric Utilities Corp [Member]

Summary of Significant Accounting Policies [Line Items]

Intercompany tax receivables (payables)

At December 31, the following intercompany tax receivables (payables) were recorded:

	2020		2019
PPL Electric	$	(9)	$	3
LKE	(12)		(8)
LG&E	(1)		(4)
KU	(5)		(6)

Reconciliation of Cash, Cash Equivalents and Restricted Cash from the Balance Sheet to Cash Flow

The following provides a reconciliation of Cash, Cash Equivalents and Restricted Cash reported within the Balance Sheets to the amounts shown on the Statements of Cash Flows:

	PPL				PPL Electric
	December 31, 2020		December 31, 2019		December 31, 2020		December 31, 2019
Cash and cash equivalents	$	708	$	815	$	40	$	262
Restricted cash - current	1		3		—		2
Restricted cash - noncurrent (a)	18		18		—		—
Total Cash, Cash Equivalents and Restricted Cash	$	727	$	836	$	40	$	264

(a)Bank deposits and other cash equivalents that are restricted by agreement or that have been clearly designated for a specific purpose are classified as restricted cash. On the Balance Sheets, the current portion of restricted cash is included in "Other current assets," while the noncurrent portion is included in "Other noncurrent assets."

LG And E And KU Energy LLC [Member]

Summary of Significant Accounting Policies [Line Items]

Intercompany tax receivables (payables)

At December 31, the following intercompany tax receivables (payables) were recorded:

	2020		2019
PPL Electric	$	(9)	$	3
LKE	(12)		(8)
LG&E	(1)		(4)
KU	(5)		(6)

Louisville Gas And Electric Co [Member]

Summary of Significant Accounting Policies [Line Items]

Intercompany tax receivables (payables)

At December 31, the following intercompany tax receivables (payables) were recorded:

	2020		2019
PPL Electric	$	(9)	$	3
LKE	(12)		(8)
LG&E	(1)		(4)
KU	(5)		(6)

Kentucky Utilities Co [Member]

Summary of Significant Accounting Policies [Line Items]

Intercompany tax receivables (payables)

At December 31, the following intercompany tax receivables (payables) were recorded:

	2020		2019
PPL Electric	$	(9)	$	3
LKE	(12)		(8)
LG&E	(1)		(4)
KU	(5)		(6)