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Revenue from Contracts with Customers (Tables)
 6 Months Ended
Jun. 30, 2021
Revenue from Contracts with Customers [Line Items]  
Disaggregation of Revenue [Table Text Block]
The following tables show revenues from contracts with customers disaggregated by customer class for the periods ended June 30.
2021 Three Months
PPLPPL ElectricLG&EKU
Residential$567 $279 $144 $144 
Commercial297 83 107 107 
Industrial 154 13 43 98 
Other (a)93 13 31 39 
Wholesale - municipality5 — — 5 
Wholesale - other (b)13 — 14 11 
Transmission173 173 — — 
Revenues from Contracts with Customers$1,302 $561 $339 $404 
2020 Three Months
PPLPPL ElectricLG&EKU
Residential$583 $290 $149 $144 
Commercial274 74 100 100 
Industrial 134 12 38 84 
Other (a)83 12 28 34 
Wholesale - municipality3 — — 3 
Wholesale - other (b)9 — 5 14 
Transmission164 164 — — 
Revenues from Contracts with Customers$1,250 $552 $320 $379 
2021 Six Months
PPLPPL ElectricLG&EKU
Residential$1,341 $640 $349 $352 
Commercial610 165 228 217 
Industrial 306 25 89 192 
Other (a)184 25 65 76 
Wholesale - municipality11 — — 11 
Wholesale - other (b)33 — 33 24 
Transmission333 333 — — 
Revenues from Contracts with Customers$2,818 $1,188 $764 $872 
2020 Six Months
PPLPPL ElectricLG&EKU
Residential$1,297 $634 $336 $327 
Commercial586 155 224 207 
Industrial 278 20 83 175 
Other (a)170 26 56 72 
Wholesale - municipality8 — — 8 
Wholesale - other (b)17 — 22 19 
Transmission323 323 — — 
Revenues from Contracts with Customers$2,679 $1,158 $721 $808 

(a)Primarily includes revenues from pole attachments, street lighting, other public authorities and other non-core businesses.
(b)Includes wholesale power and transmission revenues. LG&E and KU amounts include intercompany power sales and transmission revenues, which are eliminated upon consolidation at the Kentucky Regulated segment.
Credit Loss Recognized from Contracts with Customers [Table Text Block]
The following table shows the accounts receivable and unbilled revenues balances that were impaired for the periods ended June 30.
Three MonthsSix Months
2021202020212020
PPL$— $6 $2 $12 
PPL Electric— 5 1 9 
LG&E— — — 1 
KU— 1 1 2 
Contract with Customer, Asset and Liability [Table Text Block] The following table shows the balances and certain activity of contract liabilities resulting from contracts with customers.
PPLPPL ElectricLG&EKU
Contract liabilities at December 31, 2020
$40 $23 $5 $6 
Contract liabilities at June 30, 2021
31 16 5 5 
Revenue recognized during the six months ended June 30, 2021 that was included in the contract liability balance at December 31, 2020
24 11 5 6 
Contract liabilities at December 31, 2019
$37 $21 $5 $4 
Contract liabilities at June 30, 2020
30 16 4 5 
Revenue recognized during the six months ended June 30, 2020 that was included in the contract liability balance at December 31, 2019
21 9 5 4