CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) shares in Thousands, $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Receivables, Net, Current [Abstract]
Accounts receivable reserve for doubtful accounts	$ 62	$ 58
Unbilled Contracts Receivable, Allowance for Credit Loss, Current	$ 3	$ 0
Equity
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock shares authorized (in shares)	1,560,000	1,560,000
Common stock shares issued (in shares)	768,266	767,233
Common stock shares outstanding (in shares)	768,266	767,233
PPL Electric Utilities Corp [Member]
Receivables, Net, Current [Abstract]
Accounts receivable reserve for doubtful accounts	$ 31	$ 28
Unbilled Contracts Receivable, Allowance for Credit Loss, Current	$ 2	$ 0
Equity
Common stock, no par value (in dollars per share)	$ 0.00	$ 0.00
Common stock shares authorized (in shares)	170,000	170,000
Common stock shares issued (in shares)	66,368	66,368
Common stock shares outstanding (in shares)	66,368	66,368
LG And E And KU Energy LLC [Member]
Receivables, Net, Current [Abstract]
Accounts receivable reserve for doubtful accounts	$ 27	$ 28
Unbilled Contracts Receivable, Allowance for Credit Loss, Current	0	0
Louisville Gas And Electric Co [Member]
Receivables, Net, Current [Abstract]
Accounts receivable reserve for doubtful accounts	1	1
Unbilled Contracts Receivable, Allowance for Credit Loss, Current	$ 0	$ 0
Equity
Common stock, no par value (in dollars per share)	$ 0.00	$ 0.00
Common stock shares authorized (in shares)	75,000	75,000
Common stock shares issued (in shares)	21,294	21,294
Common stock shares outstanding (in shares)	21,294	21,294
Kentucky Utilities Co [Member]
Receivables, Net, Current [Abstract]
Accounts receivable reserve for doubtful accounts	$ 1	$ 1
Unbilled Contracts Receivable, Allowance for Credit Loss, Current	$ 0	$ 0
Equity
Common stock, no par value (in dollars per share)	$ 0.00	$ 0.00
Common stock shares authorized (in shares)	80,000	80,000
Common stock shares issued (in shares)	37,818	37,818
Common stock shares outstanding (in shares)	37,818	37,818

Unbilled Contracts Receivable, Allowance for Credit Loss, Current

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Amount of allowance for credit loss on accounts receivable, classified as current.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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-Section S99
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Face amount or stated value per share of common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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