Preferred Securities	12 Months Ended
Dec. 31, 2011
PPL Corp [Member]
Preferred Securities [Line Items]
Preferred Securities	3. Preferred Securities Preferred Stock (PPL) PPL is authorized to issue up to 10 million shares of preferred stock. No PPL preferred stock was issued or outstanding in 2011, 2010, or 2009. PPL classifies preferred securities of a subsidiary as "Noncontrolling interests" on the Balance Sheets. Dividend requirements of $16 million for 2011, $17 million for 2010 and $18 million for 2009 were included in "Net Income Attributable to Noncontrolling Interests" on the Statements of Income. (PPL Electric) PPL Electric is authorized to issue up to 629,936 shares of 4-1/2% Preferred Stock and 10 million shares of series preferred stock. There were 247,524 shares of 4-1/2% Preferred Stock (amounting to $25 million) and an aggregate of 257,665 shares of four series of preferred stock (amounting to $26 million) issued and outstanding at December 31, 2009. In April 2010, PPL Electric redeemed all of its outstanding preferred stock, with a par value in the aggregate of $51 million, for $54 million including accumulated dividends. The redeemed shares are no longer outstanding and represent only the right to receive the applicable redemption price, to the extent the shares have not yet been presented for payment. The premium of $3 million is included in "Distributions on Preferred Securities" on the Statement of Income. (LG&E) LG&E is authorized to issue up to 1,720,000 shares of preferred stock at a $25 par value and 6,750,000 shares of preferred stock without par value. LG&E had no preferred stock issued or outstanding in 2011, 2010 or 2009. (KU) KU is authorized to issue up to 5,300,000 shares of preferred stock without par value. KU had no preferred stock issued or outstanding in 2011, 2010 or 2009. (KU) KU is authorized to issue up to 2,000,000 shares of preference stock without par value. KU had no preference stock issued or outstanding in 2011, 2010 or 2009.
PPL Electric [Member]
Preferred Securities [Line Items]
Preferred Securities	3. Preferred Securities Preferred Stock (PPL) PPL is authorized to issue up to 10 million shares of preferred stock. No PPL preferred stock was issued or outstanding in 2011, 2010, or 2009. PPL classifies preferred securities of a subsidiary as "Noncontrolling interests" on the Balance Sheets. Dividend requirements of $16 million for 2011, $17 million for 2010 and $18 million for 2009 were included in "Net Income Attributable to Noncontrolling Interests" on the Statements of Income. (PPL Electric) PPL Electric is authorized to issue up to 629,936 shares of 4-1/2% Preferred Stock and 10 million shares of series preferred stock. There were 247,524 shares of 4-1/2% Preferred Stock (amounting to $25 million) and an aggregate of 257,665 shares of four series of preferred stock (amounting to $26 million) issued and outstanding at December 31, 2009. In April 2010, PPL Electric redeemed all of its outstanding preferred stock, with a par value in the aggregate of $51 million, for $54 million including accumulated dividends. The redeemed shares are no longer outstanding and represent only the right to receive the applicable redemption price, to the extent the shares have not yet been presented for payment. The premium of $3 million is included in "Distributions on Preferred Securities" on the Statement of Income. (LG&E) LG&E is authorized to issue up to 1,720,000 shares of preferred stock at a $25 par value and 6,750,000 shares of preferred stock without par value. LG&E had no preferred stock issued or outstanding in 2011, 2010 or 2009. (KU) KU is authorized to issue up to 5,300,000 shares of preferred stock without par value. KU had no preferred stock issued or outstanding in 2011, 2010 or 2009. Preference Stock (PPL Electric) Of the 10 million shares of Preference Stock authorized, PPL Electric had 2.5 million shares of 6.25% Series Preference Stock (Preference Shares) issued and outstanding in 2011, 2010 and 2009. The Preference Shares are held by a bank that acts as depositary for 10 million depositary shares, each of which represents a one-quarter interest in a Preference Share. Holders of the depositary shares are entitled to all proportional rights and preferences of the Preference Shares, including dividend, voting, redemption and liquidation rights, exercised through the bank acting as a depositary. The Preference Shares rank senior to PPL Electric's common stock but have no voting rights, except as provided by law, and they have a liquidation preference of $100 per share (equivalent to $25 per depositary share). The Preference Shares, which have no stated maturity date and no sinking fund requirements, have been redeemable by PPL Electric since April 6, 2011 for $100 per share (equivalent to $25 per depositary share). Dividends on the Preference Shares are not cumulative and will be paid when, as and if declared by the Board of Directors at a fixed annual rate of 6.25%, or $1.5625 per depositary share per year. PPL Electric may not pay dividends on, or redeem, purchase or make a liquidation payment with respect to any of its common stock, except in certain circumstances, unless full dividends on the Preference Shares have been paid for the then-current dividend period. (KU) KU is authorized to issue up to 2,000,000 shares of preference stock without par value. KU had no preference stock issued or outstanding in 2011, 2010 or 2009.
LGE [Member]
Preferred Securities [Line Items]
Preferred Securities	3. Preferred Securities Preferred Stock (PPL) PPL is authorized to issue up to 10 million shares of preferred stock. No PPL preferred stock was issued or outstanding in 2011, 2010, or 2009. PPL classifies preferred securities of a subsidiary as "Noncontrolling interests" on the Balance Sheets. Dividend requirements of $16 million for 2011, $17 million for 2010 and $18 million for 2009 were included in "Net Income Attributable to Noncontrolling Interests" on the Statements of Income. (PPL Electric) PPL Electric is authorized to issue up to 629,936 shares of 4-1/2% Preferred Stock and 10 million shares of series preferred stock. There were 247,524 shares of 4-1/2% Preferred Stock (amounting to $25 million) and an aggregate of 257,665 shares of four series of preferred stock (amounting to $26 million) issued and outstanding at December 31, 2009. In April 2010, PPL Electric redeemed all of its outstanding preferred stock, with a par value in the aggregate of $51 million, for $54 million including accumulated dividends. The redeemed shares are no longer outstanding and represent only the right to receive the applicable redemption price, to the extent the shares have not yet been presented for payment. The premium of $3 million is included in "Distributions on Preferred Securities" on the Statement of Income. (LG&E) LG&E is authorized to issue up to 1,720,000 shares of preferred stock at a $25 par value and 6,750,000 shares of preferred stock without par value. LG&E had no preferred stock issued or outstanding in 2011, 2010 or 2009. (KU) KU is authorized to issue up to 5,300,000 shares of preferred stock without par value. KU had no preferred stock issued or outstanding in 2011, 2010 or 2009. Preference Stock (PPL Electric) Of the 10 million shares of Preference Stock authorized, PPL Electric had 2.5 million shares of 6.25% Series Preference Stock (Preference Shares) issued and outstanding in 2011, 2010 and 2009. The Preference Shares are held by a bank that acts as depositary for 10 million depositary shares, each of which represents a one-quarter interest in a Preference Share. Holders of the depositary shares are entitled to all proportional rights and preferences of the Preference Shares, including dividend, voting, redemption and liquidation rights, exercised through the bank acting as a depositary. The Preference Shares rank senior to PPL Electric's common stock but have no voting rights, except as provided by law, and they have a liquidation preference of $100 per share (equivalent to $25 per depositary share). The Preference Shares, which have no stated maturity date and no sinking fund requirements, have been redeemable by PPL Electric since April 6, 2011 for $100 per share (equivalent to $25 per depositary share). Dividends on the Preference Shares are not cumulative and will be paid when, as and if declared by the Board of Directors at a fixed annual rate of 6.25%, or $1.5625 per depositary share per year. PPL Electric may not pay dividends on, or redeem, purchase or make a liquidation payment with respect to any of its common stock, except in certain circumstances, unless full dividends on the Preference Shares have been paid for the then-current dividend period. (KU) KU is authorized to issue up to 2,000,000 shares of preference stock without par value. KU had no preference stock issued or outstanding in 2011, 2010 or 2009.
KU [Member]
Preferred Securities [Line Items]
Preferred Securities	3. Preferred Securities Preferred Stock (PPL) PPL is authorized to issue up to 10 million shares of preferred stock. No PPL preferred stock was issued or outstanding in 2011, 2010, or 2009. PPL classifies preferred securities of a subsidiary as "Noncontrolling interests" on the Balance Sheets. Dividend requirements of $16 million for 2011, $17 million for 2010 and $18 million for 2009 were included in "Net Income Attributable to Noncontrolling Interests" on the Statements of Income. (PPL Electric) PPL Electric is authorized to issue up to 629,936 shares of 4-1/2% Preferred Stock and 10 million shares of series preferred stock. There were 247,524 shares of 4-1/2% Preferred Stock (amounting to $25 million) and an aggregate of 257,665 shares of four series of preferred stock (amounting to $26 million) issued and outstanding at December 31, 2009. In April 2010, PPL Electric redeemed all of its outstanding preferred stock, with a par value in the aggregate of $51 million, for $54 million including accumulated dividends. The redeemed shares are no longer outstanding and represent only the right to receive the applicable redemption price, to the extent the shares have not yet been presented for payment. The premium of $3 million is included in "Distributions on Preferred Securities" on the Statement of Income. (LG&E) LG&E is authorized to issue up to 1,720,000 shares of preferred stock at a $25 par value and 6,750,000 shares of preferred stock without par value. LG&E had no preferred stock issued or outstanding in 2011, 2010 or 2009. (KU) KU is authorized to issue up to 5,300,000 shares of preferred stock without par value. KU had no preferred stock issued or outstanding in 2011, 2010 or 2009. Preference Stock (PPL Electric) Of the 10 million shares of Preference Stock authorized, PPL Electric had 2.5 million shares of 6.25% Series Preference Stock (Preference Shares) issued and outstanding in 2011, 2010 and 2009. The Preference Shares are held by a bank that acts as depositary for 10 million depositary shares, each of which represents a one-quarter interest in a Preference Share. Holders of the depositary shares are entitled to all proportional rights and preferences of the Preference Shares, including dividend, voting, redemption and liquidation rights, exercised through the bank acting as a depositary. The Preference Shares rank senior to PPL Electric's common stock but have no voting rights, except as provided by law, and they have a liquidation preference of $100 per share (equivalent to $25 per depositary share). The Preference Shares, which have no stated maturity date and no sinking fund requirements, have been redeemable by PPL Electric since April 6, 2011 for $100 per share (equivalent to $25 per depositary share). Dividends on the Preference Shares are not cumulative and will be paid when, as and if declared by the Board of Directors at a fixed annual rate of 6.25%, or $1.5625 per depositary share per year. PPL Electric may not pay dividends on, or redeem, purchase or make a liquidation payment with respect to any of its common stock, except in certain circumstances, unless full dividends on the Preference Shares have been paid for the then-current dividend period. (KU) KU is authorized to issue up to 2,000,000 shares of preference stock without par value. KU had no preference stock issued or outstanding in 2011, 2010 or 2009.

3. Preferred Securities

Preferred Stock

(PPL)

PPL is authorized to issue up to 10 million shares of preferred stock. No PPL preferred stock was issued or outstanding in 2011, 2010, or 2009.

PPL classifies preferred securities of a subsidiary as "Noncontrolling interests" on the Balance Sheets. Dividend requirements of $16 million for 2011, $17 million for 2010 and $18 million for 2009 were included in "Net Income Attributable to Noncontrolling Interests" on the Statements of Income.

(PPL Electric)

PPL Electric is authorized to issue up to 629,936 shares of 4-1/2% Preferred Stock and 10 million shares of series preferred stock. There were 247,524 shares of 4-1/2% Preferred Stock (amounting to $25 million) and an aggregate of 257,665 shares of four series of preferred stock (amounting to $26 million) issued and outstanding at December 31, 2009.

In April 2010, PPL Electric redeemed all of its outstanding preferred stock, with a par value in the aggregate of $51 million, for $54 million including accumulated dividends. The redeemed shares are no longer outstanding and represent only the right to receive the applicable redemption price, to the extent the shares have not yet been presented for payment. The premium of $3 million is included in "Distributions on Preferred Securities" on the Statement of Income.

(LG&E)

LG&E is authorized to issue up to 1,720,000 shares of preferred stock at a $25 par value and 6,750,000 shares of preferred stock without par value. LG&E had no preferred stock issued or outstanding in 2011, 2010 or 2009.

(KU)

KU is authorized to issue up to 5,300,000 shares of preferred stock without par value. KU had no preferred stock issued or outstanding in 2011, 2010 or 2009.

Preference Stock

(PPL Electric)

Of the 10 million shares of Preference Stock authorized, PPL Electric had 2.5 million shares of 6.25% Series Preference Stock (Preference Shares) issued and outstanding in 2011, 2010 and 2009. The Preference Shares are held by a bank that acts as depositary for 10 million depositary shares, each of which represents a one-quarter interest in a Preference Share. Holders of the depositary shares are entitled to all proportional rights and preferences of the Preference Shares, including dividend, voting, redemption and liquidation rights, exercised through the bank acting as a depositary. The Preference Shares rank senior to PPL Electric's common stock but have no voting rights, except as provided by law, and they have a liquidation preference of $100 per share (equivalent to $25 per depositary share). The Preference Shares, which have no stated maturity date and no sinking fund requirements, have been redeemable by PPL Electric since April 6, 2011 for $100 per share (equivalent to $25 per depositary share).

Dividends on the Preference Shares are not cumulative and will be paid when, as and if declared by the Board of Directors at a fixed annual rate of 6.25%, or $1.5625 per depositary share per year. PPL Electric may not pay dividends on, or redeem, purchase or make a liquidation payment with respect to any of its common stock, except in certain circumstances, unless full dividends on the Preference Shares have been paid for the then-current dividend period.

(KU)

KU is authorized to issue up to 2,000,000 shares of preference stock without par value. KU had no preference stock issued or outstanding in 2011, 2010 or 2009.

Preferred Securities [Line Items]

Preferred Securities

3. Preferred Securities

Preferred Stock

(PPL)

PPL is authorized to issue up to 10 million shares of preferred stock. No PPL preferred stock was issued or outstanding in 2011, 2010, or 2009.

PPL classifies preferred securities of a subsidiary as "Noncontrolling interests" on the Balance Sheets. Dividend requirements of $16 million for 2011, $17 million for 2010 and $18 million for 2009 were included in "Net Income Attributable to Noncontrolling Interests" on the Statements of Income.

(PPL Electric)

PPL Electric is authorized to issue up to 629,936 shares of 4-1/2% Preferred Stock and 10 million shares of series preferred stock. There were 247,524 shares of 4-1/2% Preferred Stock (amounting to $25 million) and an aggregate of 257,665 shares of four series of preferred stock (amounting to $26 million) issued and outstanding at December 31, 2009.

In April 2010, PPL Electric redeemed all of its outstanding preferred stock, with a par value in the aggregate of $51 million, for $54 million including accumulated dividends. The redeemed shares are no longer outstanding and represent only the right to receive the applicable redemption price, to the extent the shares have not yet been presented for payment. The premium of $3 million is included in "Distributions on Preferred Securities" on the Statement of Income.

(LG&E)

LG&E is authorized to issue up to 1,720,000 shares of preferred stock at a $25 par value and 6,750,000 shares of preferred stock without par value. LG&E had no preferred stock issued or outstanding in 2011, 2010 or 2009.

(KU)

KU is authorized to issue up to 5,300,000 shares of preferred stock without par value. KU had no preferred stock issued or outstanding in 2011, 2010 or 2009.

Preference Stock

(PPL Electric)

Of the 10 million shares of Preference Stock authorized, PPL Electric had 2.5 million shares of 6.25% Series Preference Stock (Preference Shares) issued and outstanding in 2011, 2010 and 2009. The Preference Shares are held by a bank that acts as depositary for 10 million depositary shares, each of which represents a one-quarter interest in a Preference Share. Holders of the depositary shares are entitled to all proportional rights and preferences of the Preference Shares, including dividend, voting, redemption and liquidation rights, exercised through the bank acting as a depositary. The Preference Shares rank senior to PPL Electric's common stock but have no voting rights, except as provided by law, and they have a liquidation preference of $100 per share (equivalent to $25 per depositary share). The Preference Shares, which have no stated maturity date and no sinking fund requirements, have been redeemable by PPL Electric since April 6, 2011 for $100 per share (equivalent to $25 per depositary share).

Dividends on the Preference Shares are not cumulative and will be paid when, as and if declared by the Board of Directors at a fixed annual rate of 6.25%, or $1.5625 per depositary share per year. PPL Electric may not pay dividends on, or redeem, purchase or make a liquidation payment with respect to any of its common stock, except in certain circumstances, unless full dividends on the Preference Shares have been paid for the then-current dividend period.

(KU)

KU is authorized to issue up to 2,000,000 shares of preference stock without par value. KU had no preference stock issued or outstanding in 2011, 2010 or 2009.