Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Summary of Significant Accounting Policies [Line Items]

Schedule of Prospective Adoption of New Accounting Pronouncements [Table Text Block]

The following table shows the amounts recorded on the Balance Sheets as of January 1, 2019 as a result of the adoption of the new lease guidance using a modified retrospective transition method with transition applied as of the beginning of the period of adoption:

	PPL		LKE		LG&E		KU
Right-of-Use Asset (a)	$	81	$	56	$	23	$	31
Lease Liability - Current (b)	23		18		9		9
Lease Liability - Noncurrent (c)	67		46		18		26

(a) Right-of-Use Assets are recorded in "Other noncurrent assets" on the Balance Sheets.

(b) Current lease liabilities are recorded in "Other current liabilities" on the Balance Sheets.

(c)

Noncurrent lease liabilities are recorded in "Other deferred credits and noncurrent liabilities" on the Balance Sheets.

Schedule of Valuation and Qualifying Accounts Disclosure

The changes in the allowance for doubtful accounts were:

			Additions
	Balance at Beginning of Period		Charged to Income		Charged to Other Accounts			Deductions (a)		Balance at End of Period
PPL
2019	$	56	$	37	$	3		$	38	$	58
2018	51		41		3			39		56
2017	54		28		(1		)	30		51
PPL Electric
2019	$	27	$	26	$	—		$	25	$	28
2018	24		29		—			26		27
2017	28		18		—			22		24
LKE
2019	$	27	$	8	$	3		$	10	$	28
2018	25		10		3			11		27
2017	24		8		(1		)	6		25
LG&E
2019	$	1	$	2	$	2		$	4	$	1
2018	1		4		1			5		1
2017	2		2		(1		)	2		1
KU
2019	$	2	$	4	$	1		$	6	$	1
2018	1		5		2			6		2
2017	2		4		(1		)	4		1

(a) Primarily related to uncollectible accounts written off.

Weighted-average Rates of Depreciation

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

	2019		2018		2017
PPL	2.84	%	2.77	%	2.65	%
PPL Electric	3.05	%	3.01	%	2.86	%
LKE	3.96	%	3.69	%	3.64	%
LG&E	3.87	%	3.63	%	3.63	%
KU	4.02	%	3.74	%	3.66	%

Schedule of Utility Inventory

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

	PPL				LKE				LG&E				KU
	2019		2018		2019		2018		2019		2018		2019		2018
Fuel	$	106	$	98	$	106	$	98	$	43	$	42	$	63	$	56
Natural gas stored underground	35		41		35		41		35		41		—		—
Materials and supplies	191		164		109		109		44		44		65		65
Total	$	332	$	303	$	250	$	248	$	122	$	127	$	128	$	121

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 that sum to the total of the same amounts shown on the Statements of Cash Flows:

	PPL				PPL Electric
	December 31, 2019		December 31, 2018		December 31, 2019		December 31, 2018
Cash and cash equivalents	$	815	$	621	$	262	$	267
Restricted cash - current	3		3		2		2
Restricted cash - noncurrent (a)	18		19		—		—
Total Cash, Cash Equivalents and Restricted Cash	$	836	$	643	$	264	$	269

(a)

Primarily consists of funds received by WPD, which are to be spent on approved initiatives to support a low carbon environment.

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:

	2019			2018
PPL Electric	$	3		$	19
LKE	(8		)	(16		)
LG&E	(4		)	—
KU	(6		)	(5		)

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 that sum to the total of the same amounts shown on the Statements of Cash Flows:

	PPL				PPL Electric
	December 31, 2019		December 31, 2018		December 31, 2019		December 31, 2018
Cash and cash equivalents	$	815	$	621	$	262	$	267
Restricted cash - current	3		3		2		2
Restricted cash - noncurrent (a)	18		19		—		—
Total Cash, Cash Equivalents and Restricted Cash	$	836	$	643	$	264	$	269

(a)

Primarily consists of funds received by WPD, which are to be spent on approved initiatives to support a low carbon environment.

LG And E And KU Energy LLC [Member]

Summary of Significant Accounting Policies [Line Items]

Schedule of Prospective Adoption of New Accounting Pronouncements [Table Text Block]

The following table shows the amounts recorded on the Balance Sheets as of January 1, 2019 as a result of the adoption of the new lease guidance using a modified retrospective transition method with transition applied as of the beginning of the period of adoption:

	PPL		LKE		LG&E		KU
Right-of-Use Asset (a)	$	81	$	56	$	23	$	31
Lease Liability - Current (b)	23		18		9		9
Lease Liability - Noncurrent (c)	67		46		18		26

(a) Right-of-Use Assets are recorded in "Other noncurrent assets" on the Balance Sheets.

(b) Current lease liabilities are recorded in "Other current liabilities" on the Balance Sheets.

(c)

Noncurrent lease liabilities are recorded in "Other deferred credits and noncurrent liabilities" on the Balance Sheets.

Intercompany tax receivables (payables)

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

	2019			2018
PPL Electric	$	3		$	19
LKE	(8		)	(16		)
LG&E	(4		)	—
KU	(6		)	(5		)

Schedule of Utility Inventory

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

	PPL				LKE				LG&E				KU
	2019		2018		2019		2018		2019		2018		2019		2018
Fuel	$	106	$	98	$	106	$	98	$	43	$	42	$	63	$	56
Natural gas stored underground	35		41		35		41		35		41		—		—
Materials and supplies	191		164		109		109		44		44		65		65
Total	$	332	$	303	$	250	$	248	$	122	$	127	$	128	$	121

Louisville Gas And Electric Co [Member]

Summary of Significant Accounting Policies [Line Items]

Schedule of Prospective Adoption of New Accounting Pronouncements [Table Text Block]

The following table shows the amounts recorded on the Balance Sheets as of January 1, 2019 as a result of the adoption of the new lease guidance using a modified retrospective transition method with transition applied as of the beginning of the period of adoption:

	PPL		LKE		LG&E		KU
Right-of-Use Asset (a)	$	81	$	56	$	23	$	31
Lease Liability - Current (b)	23		18		9		9
Lease Liability - Noncurrent (c)	67		46		18		26

(a) Right-of-Use Assets are recorded in "Other noncurrent assets" on the Balance Sheets.

(b) Current lease liabilities are recorded in "Other current liabilities" on the Balance Sheets.

(c)

Noncurrent lease liabilities are recorded in "Other deferred credits and noncurrent liabilities" on the Balance Sheets.

Intercompany tax receivables (payables)

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

	2019			2018
PPL Electric	$	3		$	19
LKE	(8		)	(16		)
LG&E	(4		)	—
KU	(6		)	(5		)

Schedule of Utility Inventory

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

	PPL				LKE				LG&E				KU
	2019		2018		2019		2018		2019		2018		2019		2018
Fuel	$	106	$	98	$	106	$	98	$	43	$	42	$	63	$	56
Natural gas stored underground	35		41		35		41		35		41		—		—
Materials and supplies	191		164		109		109		44		44		65		65
Total	$	332	$	303	$	250	$	248	$	122	$	127	$	128	$	121

Kentucky Utilities Co [Member]

Summary of Significant Accounting Policies [Line Items]

Schedule of Prospective Adoption of New Accounting Pronouncements [Table Text Block]

The following table shows the amounts recorded on the Balance Sheets as of January 1, 2019 as a result of the adoption of the new lease guidance using a modified retrospective transition method with transition applied as of the beginning of the period of adoption:

	PPL		LKE		LG&E		KU
Right-of-Use Asset (a)	$	81	$	56	$	23	$	31
Lease Liability - Current (b)	23		18		9		9
Lease Liability - Noncurrent (c)	67		46		18		26

(a) Right-of-Use Assets are recorded in "Other noncurrent assets" on the Balance Sheets.

(b) Current lease liabilities are recorded in "Other current liabilities" on the Balance Sheets.

(c)

Noncurrent lease liabilities are recorded in "Other deferred credits and noncurrent liabilities" on the Balance Sheets.

Intercompany tax receivables (payables)

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

	2019			2018
PPL Electric	$	3		$	19
LKE	(8		)	(16		)
LG&E	(4		)	—
KU	(6		)	(5		)

Schedule of Utility Inventory

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

	PPL				LKE				LG&E				KU
	2019		2018		2019		2018		2019		2018		2019		2018
Fuel	$	106	$	98	$	106	$	98	$	43	$	42	$	63	$	56
Natural gas stored underground	35		41		35		41		35		41		—		—
Materials and supplies	191		164		109		109		44		44		65		65
Total	$	332	$	303	$	250	$	248	$	122	$	127	$	128	$	121