CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Receivables Net Current [Abstract]
Accounts receivable reserve for uncollectible accounts	$ 47	$ 46
Equity
Common stock par value	$ 0.01	$ 0.01
Common stock shares authorized	780,000us-gaap_CommonStockSharesAuthorized	780,000us-gaap_CommonStockSharesAuthorized
Common stock shares issued	667,713us-gaap_CommonStockSharesIssued	665,849us-gaap_CommonStockSharesIssued
Common stock shares outstanding	667,713us-gaap_CommonStockSharesOutstanding	665,849us-gaap_CommonStockSharesOutstanding
PPL Electric Utilities Corp [Member]
Receivables Net Current [Abstract]
Accounts receivable reserve for uncollectible accounts	17	17
Equity
Common stock no par value
Common stock shares authorized	170,000	170,000
Common stock shares issued	66,368	66,368
Common stock shares outstanding	66,368	66,368
LG And E And KU Energy LLC [Member]
Receivables Net Current [Abstract]
Accounts receivable reserve for uncollectible accounts	26	25
Louisville Gas And Electric Co [Member]
Receivables Net Current [Abstract]
Accounts receivable reserve for uncollectible accounts	2	2
Equity
Common stock no par value
Common stock shares authorized	75,000	75,000
Common stock shares issued	21,294	21,294
Common stock shares outstanding	21,294	21,294
Kentucky Utilities Co [Member]
Receivables Net Current [Abstract]
Accounts receivable reserve for uncollectible accounts	$ 3	$ 2
Equity
Common stock no par value
Common stock shares authorized	80,000	80,000
Common stock shares issued	37,818	37,818
Common stock shares outstanding	37,818	37,818

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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