Retirement and Postemployment Benefits (Plan Assets and Expected Cash Flows) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			12 Months Ended							12 Months Ended																																																								12 Months Ended								12 Months Ended								12 Months Ended																																12 Months Ended																																12 Months Ended									12 Months Ended													12 Months Ended										12 Months Ended			12 Months Ended									12 Months Ended								12 Months Ended								12 Months Ended								12 Months Ended								12 Months Ended								12 Months Ended																12 Months Ended								12 Months Ended																								12 Months Ended				12 Months Ended										12 Months Ended			12 Months Ended				12 Months Ended							12 Months Ended																		12 Months Ended																												12 Months Ended		12 Months Ended							12 Months Ended																																																								12 Months Ended								12 Months Ended								12 Months Ended																																12 Months Ended																																12 Months Ended									12 Months Ended													12 Months Ended										12 Months Ended						12 Months Ended		12 Months Ended							12 Months Ended																																																								12 Months Ended								12 Months Ended								12 Months Ended																																12 Months Ended																																12 Months Ended									12 Months Ended													12 Months Ended										12 Months Ended			12 Months Ended		12 Months Ended																																																		12 Months Ended							12 Months Ended																																																								12 Months Ended								12 Months Ended								12 Months Ended																																12 Months Ended																																12 Months Ended									12 Months Ended													12 Months Ended										12 Months Ended
	Dec. 31, 2012 Master Trust [Member] Other Debt Securities [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United States [Member]	Dec. 31, 2011 Pension Benefits United States [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Integer		Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Receivables And Payables Net [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Receivables And Payables Net [Member]		Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Account 401 H [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Account 401 H [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Total Trust Assets Not Including 401 H Assets [Member]	Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Total Trust Assets Not Including 401 H Assets [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member]		Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member] Equity Securities [Member]		Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member] Equity Securities [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member] Debt Securities [Member]		Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member] Debt Securities [Member]		Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member] Alternative Investments [Member]		Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member] Alternative Investments [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Immunizing Portfolio [Member]		Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Immunizing Portfolio [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Immunizing Portfolio [Member] Debt Securities [Member]		Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Immunizing Portfolio [Member] Debt Securities [Member]		Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Immunizing Portfolio [Member] Derivatives [Member]		Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Immunizing Portfolio [Member] Derivatives [Member]	Dec. 31, 2013 Pension Benefits United States [Member] Master Trust [Member] Liquidity Portfolio [Member]		Dec. 31, 2012 Pension Benefits United States [Member] Master Trust [Member] Liquidity Portfolio [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Integer	Dec. 31, 2012 Pension Benefits United Kingdom [Member]	Dec. 31, 2011 Pension Benefits United Kingdom [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Cash And Cash Equivalents [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Cash And Cash Equivalents [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Cash And Cash Equivalents [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Cash And Cash Equivalents [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Cash And Cash Equivalents [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Cash And Cash Equivalents [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Cash And Cash Equivalents [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Cash And Cash Equivalents [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] UK Companies Equity Securities [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] UK Companies Equity Securities [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] UK Companies Equity Securities [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] UK Companies Equity Securities [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] UK Companies Equity Securities [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] UK Companies Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] UK Companies Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] UK Companies Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] European Companies Excluding UK Equity Securities [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] European Companies Excluding UK Equity Securities [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] European Companies Excluding UK Equity Securities [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] European Companies Excluding UK Equity Securities [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] European Companies Excluding UK Equity Securities [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] European Companies Excluding UK Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] European Companies Excluding UK Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] European Companies Excluding UK Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Asian Pacific Companies Equity Securities [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Asian Pacific Companies Equity Securities [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Asian Pacific Companies Equity Securities [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Asian Pacific Companies Equity Securities [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Asian Pacific Companies Equity Securities [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Asian Pacific Companies Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Asian Pacific Companies Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Asian Pacific Companies Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] North American Companies Equity Securities [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] North American Companies Equity Securities [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] North American Companies Equity Securities [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] North American Companies Equity Securities [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] North American Companies Equity Securities [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] North American Companies Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] North American Companies Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] North American Companies Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Emerging Markets Companies Equity Securities [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Emerging Markets Companies Equity Securities [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Emerging Markets Companies Equity Securities [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Emerging Markets Companies Equity Securities [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Emerging Markets Companies Equity Securities [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Emerging Markets Companies Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Emerging Markets Companies Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Emerging Markets Companies Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Global Equities Equity Securities [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Global Equities Equity Securities [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Global Equities Equity Securities [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Global Equities Equity Securities [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Global Equities Equity Securities [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Global Equities Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Global Equities Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Global Equities Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Currency Equity Securities [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Currency Equity Securities [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Currency Equity Securities [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Currency Equity Securities [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Currency Equity Securities [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Currency Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Currency Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Currency Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Global Tactical Asset Allocation Equity Securities [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Global Tactical Asset Allocation Equity Securities [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Global Tactical Asset Allocation Equity Securities [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Global Tactical Asset Allocation Equity Securities [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Global Tactical Asset Allocation Equity Securities [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Global Tactical Asset Allocation Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Global Tactical Asset Allocation Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Global Tactical Asset Allocation Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] UK Corporate Bonds Commingled Debt Equity Securities [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] UK Corporate Bonds Commingled Debt Equity Securities [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] UK Corporate Bonds Commingled Debt Equity Securities [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] UK Corporate Bonds Commingled Debt Equity Securities [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] UK Corporate Bonds Commingled Debt Equity Securities [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] UK Corporate Bonds Commingled Debt Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] UK Corporate Bonds Commingled Debt Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] UK Corporate Bonds Commingled Debt Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] UK Gilts Commingled Debt Equity Securities [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] UK Gilts Commingled Debt Equity Securities [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] UK Gilts Commingled Debt Equity Securities [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] UK Gilts Commingled Debt Equity Securities [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] UK Gilts Commingled Debt Equity Securities [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] UK Gilts Commingled Debt Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] UK Gilts Commingled Debt Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] UK Gilts Commingled Debt Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Debt Securities [Member]		Dec. 31, 2012 Pension Benefits United Kingdom [Member] Debt Securities [Member]		Dec. 31, 2013 Pension Benefits United Kingdom [Member] Alternative Investments [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Alternative Investments [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Real Estate Alternative Investments [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Real Estate Alternative Investments [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Real Estate Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Real Estate Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Real Estate Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Real Estate Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2013 Pension Benefits United Kingdom [Member] Real Estate Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2012 Pension Benefits United Kingdom [Member] Real Estate Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2013 Other Postretirement Benefits United States [Member]	Dec. 31, 2012 Other Postretirement 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States Large Cap Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 Other Postretirement Benefits United States [Member] United States Large Cap Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 Other Postretirement Benefits United States [Member] United States Large Cap Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 Other Postretirement Benefits United States [Member] United States Commingled Debt Equity Securities [Member]	Dec. 31, 2012 Other Postretirement Benefits United States [Member] United States Commingled Debt Equity Securities [Member]	Dec. 31, 2013 Other Postretirement Benefits United States [Member] United States Commingled Debt Equity Securities [Member] Level 1 [Member]	Dec. 31, 2012 Other Postretirement Benefits United States [Member] United States Commingled Debt Equity Securities [Member] Level 1 [Member]	Dec. 31, 2013 Other Postretirement Benefits United States [Member] United States Commingled Debt Equity Securities [Member] Level 2 [Member]	Dec. 31, 2012 Other Postretirement Benefits United States [Member] United States Commingled Debt Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 Other Postretirement Benefits United States [Member] United States Commingled Debt Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 Other Postretirement Benefits United States [Member] United States Commingled Debt Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 Other Postretirement Benefits United States [Member] Debt Securities [Member]		Dec. 31, 2012 Other Postretirement Benefits United States [Member] Debt Securities [Member]		Dec. 31, 2013 Other Postretirement Benefits United States [Member] Municipalities Debt Securities [Member]	Dec. 31, 2012 Other Postretirement Benefits United States [Member] Municipalities Debt Securities [Member]	Dec. 31, 2013 Other Postretirement Benefits United States [Member] Municipalities Debt Securities [Member] Level 1 [Member]	Dec. 31, 2012 Other Postretirement Benefits 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Postretirement Benefits United States [Member] Total Trust Assets Not Including 401 H Assets [Member]	Dec. 31, 2012 Other Postretirement Benefits United States [Member] Total Trust Assets Not Including 401 H Assets [Member]	Dec. 31, 2013 Other Postretirement Benefits United States [Member] Total Trust Assets Not Including 401 H Assets [Member] Level 1 [Member]	Dec. 31, 2012 Other Postretirement Benefits United States [Member] Total Trust Assets Not Including 401 H Assets [Member] Level 1 [Member]	Dec. 31, 2013 Other Postretirement Benefits United States [Member] Total Trust Assets Not Including 401 H Assets [Member] Level 2 [Member]	Dec. 31, 2012 Other Postretirement Benefits United States [Member] Total Trust Assets Not Including 401 H Assets [Member] Level 2 [Member]	Dec. 31, 2013 Other Postretirement Benefits United States [Member] Total Trust Assets Not Including 401 H Assets [Member] Level 3 [Member]	Dec. 31, 2012 Other Postretirement Benefits United States [Member] Total Trust Assets Not Including 401 H Assets [Member] Level 3 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member]	Dec. 31, 2011 PPL Energy Supply LLC [Member] Pension Benefits United States [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Integer		Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Level 1 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Level 1 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Level 2 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Level 2 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Level 3 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Level 3 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member] Level 1 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member] Level 1 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member] Level 2 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member] Level 2 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member] Level 3 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member] Level 3 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member] Level 1 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member] Level 1 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member] Level 2 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member] Level 1 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member] Level 1 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member] Level 2 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member] Level 1 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member] Level 1 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member] Level 2 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member] Level 1 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member] Level 1 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member] Level 2 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member] Level 1 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member] Level 1 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member] Level 2 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member] Level 2 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member] Level 3 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member] Level 3 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member] Level 1 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member] Level 1 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member] Level 2 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member] Level 2 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member] Level 3 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member] Level 3 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member] Level 1 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member] Level 1 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member] Level 2 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member] Level 2 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member] Level 3 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member] Level 3 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member] Level 1 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member] Level 1 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member] Level 2 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member] Level 2 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member] Level 3 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member] Level 3 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member] Level 1 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member] Level 1 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member] Level 2 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member] Level 2 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member] Level 3 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member] Level 3 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member] Level 1 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member] Level 1 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member] Level 2 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member] Level 2 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member] Level 3 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member] Level 3 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member] Level 1 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member] Level 1 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member] Level 2 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member] Level 2 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member] Level 3 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member] Level 3 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member] Level 1 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member] Level 1 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member] Level 2 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member] Level 2 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member] Level 3 [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member] Level 3 [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Receivables And Payables Net [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Receivables And Payables Net [Member]		Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Account 401 H [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Account 401 H [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Total Trust Assets Not Including 401 H Assets [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Total Trust Assets Not Including 401 H Assets [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member]		Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member] Equity Securities [Member]		Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member] Equity Securities [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member] Debt Securities [Member]		Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member] Debt Securities [Member]		Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member] Alternative Investments [Member]		Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member] Alternative Investments [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Immunizing Portfolio [Member]		Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Immunizing Portfolio [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Immunizing Portfolio [Member] Debt Securities [Member]		Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Immunizing Portfolio [Member] Debt Securities [Member]		Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Immunizing Portfolio [Member] Derivatives [Member]		Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Immunizing Portfolio [Member] Derivatives [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Liquidity Portfolio [Member]		Dec. 31, 2012 PPL Energy Supply LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Liquidity Portfolio [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member] Other Postretirement Benefits United States [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Other Postretirement Benefits United States [Member]	Dec. 31, 2011 PPL Energy Supply LLC [Member] Other Postretirement Benefits United States [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member]	Dec. 31, 2011 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Integer		Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Level 1 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Level 1 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Level 2 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Level 2 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Level 3 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Level 3 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member] Level 1 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member] Level 1 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member] Level 2 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member] Level 2 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member] Level 3 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member] Level 3 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member] Level 1 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member] Level 1 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member] Level 2 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member] Level 1 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member] Level 1 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member] Level 2 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member] Level 1 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member] Level 1 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member] Level 2 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member] Level 1 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member] Level 1 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member] Level 2 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member] Level 1 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member] Level 1 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member] Level 2 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member] Level 2 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member] Level 3 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member] Level 3 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member] Level 1 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member] Level 1 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member] Level 2 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member] Level 2 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member] Level 3 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member] Level 3 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member] Level 1 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member] Level 1 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member] Level 2 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member] Level 2 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member] Level 3 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member] Level 3 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member] Level 1 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member] Level 1 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member] Level 2 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member] Level 2 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member] Level 3 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member] Level 3 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member] Level 1 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member] Level 1 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member] Level 2 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member] Level 2 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member] Level 3 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member] Level 3 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member] Level 1 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member] Level 1 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member] Level 2 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member] Level 2 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member] Level 3 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member] Level 3 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member] Level 1 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member] Level 1 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member] Level 2 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member] Level 2 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member] Level 3 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member] Level 3 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member] Level 1 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member] Level 1 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member] Level 2 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member] Level 2 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member] Level 3 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member] Level 3 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Receivables And Payables Net [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Receivables And Payables Net [Member]		Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Account 401 H [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Account 401 H [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Total Trust Assets Not Including 401 H Assets [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Total Trust Assets Not Including 401 H Assets [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member]		Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member] Equity Securities [Member]		Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member] Equity Securities [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member] Debt Securities [Member]		Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member] Debt Securities [Member]		Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member] Alternative Investments [Member]		Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member] Alternative Investments [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Immunizing Portfolio [Member]		Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Immunizing Portfolio [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Immunizing Portfolio [Member] Debt Securities [Member]		Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Immunizing Portfolio [Member] Debt Securities [Member]		Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Immunizing Portfolio [Member] Derivatives [Member]		Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Immunizing Portfolio [Member] Derivatives [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Liquidity Portfolio [Member]		Dec. 31, 2012 LG And E And KU Energy LLC [Member] Pension Benefits United States [Member] Master Trust [Member] Liquidity Portfolio [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member]	Dec. 31, 2011 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] Money Market Funds [Member] Integer	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] Money Market Funds [Member] Level 1 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] Money Market Funds [Member] Level 1 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] Money Market Funds [Member] Level 2 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] Money Market Funds [Member] Level 2 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] Money Market Funds [Member] Level 3 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] Money Market Funds [Member] Level 3 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] United States Large Cap Equity Securities [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] United States Large Cap Equity Securities [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] United States Large Cap Equity Securities [Member] Level 1 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] United States Large Cap Equity Securities [Member] Level 1 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] United States Large Cap Equity Securities [Member] Level 2 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] United States Large Cap Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] United States Large Cap Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] United States Large Cap Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] United States Commingled Debt Equity Securities [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] United States Commingled Debt Equity Securities [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] United States Commingled Debt Equity Securities [Member] Level 1 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] United States Commingled Debt Equity Securities [Member] Level 1 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] United States Commingled Debt Equity Securities [Member] Level 2 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] United States Commingled Debt Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] United States Commingled Debt Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] United States Commingled Debt Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] Municipalities Debt Securities [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] Municipalities Debt Securities [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] Municipalities Debt Securities [Member] Level 1 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] Municipalities Debt Securities [Member] Level 1 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] Municipalities Debt Securities [Member] Level 2 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] Municipalities Debt Securities [Member] Level 2 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] Municipalities Debt Securities [Member] Level 3 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] Municipalities Debt Securities [Member] Level 3 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] Receivables And Payables Net [Member]		Dec. 31, 2012 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] Receivables And Payables Net [Member]		Dec. 31, 2013 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] Account 401 H [Member]		Dec. 31, 2012 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] Account 401 H [Member]		Dec. 31, 2013 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] Total Trust Assets Not Including 401 H Assets [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] Total Trust Assets Not Including 401 H Assets [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] Total Trust Assets Not Including 401 H Assets [Member] Level 1 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] Total Trust Assets Not Including 401 H Assets [Member] Level 1 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] Total Trust Assets Not Including 401 H Assets [Member] Level 2 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] Total Trust Assets Not Including 401 H Assets [Member] Level 2 [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] Total Trust Assets Not Including 401 H Assets [Member] Level 3 [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Other Postretirement Benefits United States [Member] Total Trust Assets Not Including 401 H Assets [Member] Level 3 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member]	Dec. 31, 2011 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Integer		Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Level 1 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Level 1 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Level 2 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Level 2 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Level 3 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Level 3 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member] Level 1 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member] Level 1 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member] Level 2 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member] Level 2 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member] Level 3 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Cash And Cash Equivalents [Member] Level 3 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member] Level 1 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member] Level 1 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member] Level 2 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] United States Large Cap Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member] Level 1 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member] Level 1 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member] Level 2 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] United States Small Cap Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member] Level 1 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member] Level 1 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member] Level 2 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] United States Commingled Debt Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member] Level 1 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member] Level 1 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member] Level 2 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member] Level 2 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member] Level 3 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] International Equity Securities [Member] Level 3 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member] Level 1 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member] Level 1 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member] Level 2 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member] Level 2 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member] Level 3 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] US Treasury And US Government Sponsored Agency Debt Securities [Member] Level 3 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member] Level 1 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member] Level 1 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member] Level 2 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member] Level 2 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member] Level 3 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Residential - Commercial Backed Debt Securities [Member] Level 3 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member] Level 1 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member] Level 1 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member] Level 2 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member] Level 2 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member] Level 3 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Corporate Debt Securities [Member] Level 3 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member] Level 1 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member] Level 1 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member] Level 2 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member] Level 2 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member] Level 3 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Other Debt Securities [Member] Level 3 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member] Level 1 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member] Level 1 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member] Level 2 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member] Level 2 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member] Level 3 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] International Debt Securities [Member] Level 3 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Commodities Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Real Estate Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Private Equity Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member] Level 1 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member] Level 2 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Hedge Fund Of Funds Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member] Level 1 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member] Level 1 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member] Level 2 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member] Level 2 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member] Level 3 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Other Derivatives [Member] Level 3 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member] Level 1 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member] Level 1 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member] Level 2 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member] Level 2 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member] Level 3 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Interest Rate Swaps Derivatives [Member] Level 3 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member] Level 1 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member] Level 1 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member] Level 2 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member] Level 2 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member] Level 3 [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Insurance Contracts [Member] Level 3 [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Receivables And Payables Net [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Receivables And Payables Net [Member]		Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Account 401 H [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Account 401 H [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Total Trust Assets Not Including 401 H Assets [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Total Trust Assets Not Including 401 H Assets [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member]		Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member] Equity Securities [Member]		Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member] Equity Securities [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member] Debt Securities [Member]		Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member] Debt Securities [Member]		Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member] Alternative Investments [Member]		Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Growth Portfolio [Member] Alternative Investments [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Immunizing Portfolio [Member]		Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Immunizing Portfolio [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Immunizing Portfolio [Member] Debt Securities [Member]		Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Immunizing Portfolio [Member] Debt Securities [Member]		Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Immunizing Portfolio [Member] Derivatives [Member]		Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Immunizing Portfolio [Member] Derivatives [Member]	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Liquidity Portfolio [Member]		Dec. 31, 2012 Louisville Gas And Electric Co [Member] Pension Benefits United States [Member] Master Trust [Member] Liquidity Portfolio [Member]
Information About Plan Assets (Numeric) [Abstract]
Value of plan U.S. pension trust assets that relate to PPL subsidiary																																																																																																																																																																																																																																																																																																																																																																			$ 147		$ 149																																																																																																																																																																																					$ 1,200		$ 1,100																																																																																																																																																																																																																																				$ 281		$ 287
Undivided interest percentage in each asset category that PPL subsidiary holds																																																																																																																																																																																																																																																																																																																																																																			3.00%		4.00%																																																																																																																																																																																					29.00%		26.00%																																																																																																																																																																																																																																				7.00%		7.00%
Assumptions Used in Calculations (Numeric) [Abstract]
The limited lives of four partnership of private equity investments (in years)				10																																																																																																																																																																																																																																																																																																																																																															10																																																																																																																																																																																							10																																																																																																																																																																																																																																						10
The limited lives of fifth partnership of private equity investments (in years)				15																																																																																																																																																																																																																																																																																																																																																															15																																																																																																																																																																																							15																																																																																																																																																																																																																																						15
The amount of potential liability that maybe required to be funded by the master trust during life of the partnership				76																																																																																																																																																																																																																																																																																																																																																															76																																																																																																																																																																																							76																																																																																																																																																																																																																																						76
Number of months from date of purchase that investment must mature																																																																																																																																																																																																																																																																																																												13																																																																																																																																																																																																																																																																																																																																																																																																																																		13
Minimum number of days notice required to redeem shares for investments in hedge funds				65																																																																																																																																																																																																																																																																																																																																																															65																																																																																																																																																																																							65																																																																																																																																																																																																																																						65
Maximum number of days notice required to redeem shares for investments in hedge funds				95																																																																																																																																																																																																																																																																																																																																																															95																																																																																																																																																																																							95																																																																																																																																																																																																																																						95
Actual Allocation by Plan Asset (Details) [Abstract]
Percentage of trust assets				100.00%	[1]	100.00%																																																																																																																																																						59.00%	[1]	58.00%	30.00%	[1]	31.00%	17.00%	[1],[2]	18.00%	[2]	12.00%	[1]	9.00%	39.00%	[1]	41.00%	40.00%	[1],[2]	40.00%	[2]	(1.00%)	[1]	1.00%	2.00%	[1]	1.00%	100.00%	100.00%								0.00%	0.00%							7.00%	6.00%							5.00%	14.00%							3.00%	0.00%							5.00%	0.00%							8.00%	3.00%															7.00%	2.00%							19.00%	18.00%																							40.00%	[3]	51.00%	[3]	6.00%	6.00%									100.00%	100.00%		4.00%	[4]	3.00%	[4]								55.00%	46.00%																	41.00%	[5]	51.00%	[5]																											100.00%	[1]	100.00%																																																																																																																																																						59.00%	[1]	58.00%	30.00%	[1]	31.00%	17.00%	[1],[2]	18.00%	[2]	12.00%	[1]	9.00%	39.00%	[1]	41.00%	40.00%	[1],[2]	40.00%	[2]	(1.00%)	[1]	1.00%	2.00%	[1]	1.00%						100.00%	[1]	100.00%																																																																																																																																																						59.00%	[1]	58.00%	30.00%	[1]	31.00%	17.00%	[1],[2]	18.00%	[2]	12.00%	[1]	9.00%	39.00%	[1]	41.00%	40.00%	[1],[2]	40.00%	[2]	(1.00%)	[1]	1.00%	2.00%	[1]	1.00%																																																					100.00%	[1]	100.00%																																																																																																																																																						59.00%	[1]	58.00%	30.00%	[1]	31.00%	17.00%	[1],[2]	18.00%	[2]	12.00%	[1]	9.00%	39.00%	[1]	41.00%	40.00%	[1],[2]	40.00%	[2]	(1.00%)	[1]	1.00%	2.00%	[1]	1.00%
Target Allocations (Details ) [Abstract]
Target asset allocation				100.00%	[1]																																																																																																																																																							55.00%	[1]												43.00%	[1]									2.00%	[1]		100.00%																	7.00%								4.00%								3.00%								5.00%								8.00%																3.00%								19.00%																								45.00%	[3]			6.00%										100.00%			5.00%	[4]										45.00%																		50.00%	[5]																													100.00%	[1]																																																																																																																																																							55.00%	[1]												43.00%	[1]									2.00%	[1]							100.00%	[1]																																																																																																																																																							55.00%	[1]												43.00%	[1]									2.00%	[1]																																																						100.00%	[1]																																																																																																																																																							55.00%	[1]												43.00%	[1]									2.00%	[1]
Target asset allocation - PPL Plans				100.00%	[1]																																																																																																																																																							55.00%	[1]												43.00%	[1]									2.00%	[1]																																																																																																																																																																															100.00%	[1]																																																																																																																																																							55.00%	[1]												43.00%	[1]									2.00%	[1]
Target asset allocation - LKE Plans				100.00%	[1]																																																																																																																																																							55.00%	[1]												43.00%	[1]									2.00%	[1]																																																																																																																																																																																																																																																																																																																																																																						100.00%	[1]																																																																																																																																																							55.00%	[1]												43.00%	[1]									2.00%	[1]																																																						100.00%	[1]																																																																																																																																																							55.00%	[1]												43.00%	[1]									2.00%	[1]
Defined benefit plan fair value of plan assets (Details) [Abstract]
Fair value at end of period		4,156	3,471	4,271			1,130	1,288	3,000	2,618	141	146	120	84	120	84					480	558	134	206	346	352			137	124	137	124					749	676	13	56	736	620			630	557	163	184	467	373			617	704	563	634	54	70			12	12			11	11	1	1	963	874			940	847	23	27	24	24			24	23		1	7	7			7	7			108	59			108	59			134	93			134	93			80	75					80	75	210	125			210	125			12	2			12	2			(49)	36			(49)	36			37	42					37	42		(11)	[6]	(115)	(102)	4,156	3,939																											7,284		6,351	1,112	957	6,172	5,954			10		10	14					523		267	223	256	217			355		275	720	80	236			226		180		46				352		254		98				411		126		285	231			161				161				485				485	127			1,384				1,384	1,220			504	593			504	593			2,426	2,907			2,426	2,907									447	423			447	423			446		391					12	12	13							182	145			182	145			100	119			100	119							36	41			36	41			1	[6]	1	[6]	115	[7]	102	[7]	330	318	12	13	318	305			147	132	4,271		4,052	1,130	1,288	3,000	2,618	141	146	120	84	120	84					480	558	134	206	346	352			137	124	137	124					749	676	13	56	736	620			630	557	163	184	467	373			617	704	563	634	54	70			12	12			11	11	1	1	963	874			940	847	23	27	24	24			24	23		1	7	7			7	7			108	59			108	59			134	93			134	93			80	75					80	75	210	125			210	125			12	2			12	2			(49)	36			(49)	36			37	42					37	42		(11)	[6]	(115)	(102)	4,156	3,939																														1,173	944	4,271		4,052	1,130	1,288	3,000	2,618	141	146	120	84	120	84					480	558	134	206	346	352			137	124	137	124					749	676	13	56	736	620			630	557	163	184	467	373			617	704	563	634	54	70			12	12			11	11	1	1	963	874			940	847	23	27	24	24			24	23		1	7	7			7	7			108	59			108	59			134	93			134	93			80	75					80	75	210	125			210	125			12	2			12	2			(49)	36			(49)	36			37	42					37	42		(11)	[6]	(115)	(102)	4,156	3,939																											74	58	12	12	13					182	145			182	145			100	119			100	119			36	41			36	41			1	[6]	1	[6]	115	[7]	102	[7]	330	318	12	13	318	305			281	287	256	4,271		4,052	1,130	1,288	3,000	2,618	141	146	120	84	120	84					480	558	134	206	346	352			137	124	137	124					749	676	13	56	736	620			630	557	163	184	467	373			617	704	563	634	54	70			12	12			11	11	1	1	963	874			940	847	23	27	24	24			24	23		1	7	7			7	7			108	59			108	59			134	93			134	93			80	75					80	75	210	125			210	125			12	2			12	2			(49)	36			(49)	36			37	42					37	42		(11)	[6]	(115)	(102)	4,156	3,939
Change in Fair Value of Level 3 Plan Assets [Roll Forward]
Balance at beginning of period		3,939	3,471	4,052			1,130	1,288	3,000	2,618	146	98	120	84	120	84					480	558	134	206	346	352			137	124	137	124					749	676	13	56	736	620			630	557	163	184	467	373			617	704	563	634	54	70			12	12			11	11	1		963	874			940	847	27	7	24	24			24	23	1		7	7			7	7			108	59			108	59			134	93			134	93			80	75					75	45	210	125			210	125			12	2			12	2			(49)	36			(49)	36			37	42					42	46		(11)	[6]	(115)	(102)	4,156	3,939																											6,911		6,351	1,112	957	6,172	5,954			14		10	14					440		267	223	256	217			956		275	720	80	236					180		46						254		98				231		126		285	231			161				161				127				485	127			1,220				1,384	1,220			504	593			504	593			2,426	2,907			2,426	2,907									447	423			447	423			421		391					13	12	13							182	145			182	145			100	119			100	119							36	41			36	41			1	[6]	1	[6]	115	[7]	102	[7]	330	318	12	13	318	305			149	132	4,052			1,130	1,288	3,000	2,618	146	98	120	84	120	84					480	558	134	206	346	352			137	124	137	124					749	676	13	56	736	620			630	557	163	184	467	373			617	704	563	634	54	70			12	12			11	11	1		963	874			940	847	27	7	24	24			24	23	1		7	7			7	7			108	59			108	59			134	93			134	93			80	75					75	45	210	125			210	125			12	2			12	2			(49)	36			(49)	36			37	42					42	46		(11)	[6]	(115)	(102)	4,156	3,939																														1,070	944	4,052			1,130	1,288	3,000	2,618	146	98	120	84	120	84					480	558	134	206	346	352			137	124	137	124					749	676	13	56	736	620			630	557	163	184	467	373			617	704	563	634	54	70			12	12			11	11	1		963	874			940	847	27	7	24	24			24	23	1		7	7			7	7			108	59			108	59			134	93			134	93			80	75					75	45	210	125			210	125			12	2			12	2			(49)	36			(49)	36			37	42					42	46		(11)	[6]	(115)	(102)	4,156	3,939																											68	58	13	12	13					182	145			182	145			100	119			100	119			36	41			36	41			1	[6]	1	[6]	115	[7]	102	[7]	330	318	12	13	318	305			281	287	256	4,052			1,130	1,288	3,000	2,618	146	98	120	84	120	84					480	558	134	206	346	352			137	124	137	124					749	676	13	56	736	620			630	557	163	184	467	373			617	704	563	634	54	70			12	12			11	11	1		963	874			940	847	27	7	24	24			24	23	1		7	7			7	7			108	59			108	59			134	93			134	93			80	75					75	45	210	125			210	125			12	2			12	2			(49)	36			(49)	36			37	42					42	46		(11)	[6]	(115)	(102)	4,156	3,939
Actual return on plan assets relating to assets still held at the reporting date											5	14																																																																1																																							3	10																															2	3																																																																																																																																																																																																																						5	14																																																																1																																							3	10																															2	3																																														5	14																																																																1																																							3	10																															2	3																																																																																													5	14																																																																1																																							3	10																															2	3
Actual return on plan assets relating to assets sold during the period											5	2																																																															5	2																																																																																																																																																																																																																																																																																														5	2																																																															5	2																																																																																																																						5	2																																																															5	2																																																																																																																																																																					5	2																																																															5	2
Purchases, sales and settlements											(14)	35																																																								1							(9)	21																																							2	20																															(7)	(7)																																																																																																																																																																																																																						(14)	35																																																								1							(9)	21																																							2	20																															(7)	(7)																																														(14)	35																																																								1							(9)	21																																							2	20																															(7)	(7)																																																																																													(14)	35																																																								1							(9)	21																																							2	20																															(7)	(7)
Transfers from level 2 to level 3												1																																																																								1																																																																																																																																																																																																																																																																																							1																																																																								1																																																																																																															1																																																																								1																																																																																																																																																														1																																																																								1
Transfers from level 3 to level 2											(1)	(4)																																																																(4)							(1)																																																																																																																																																																																																																																																																																							(1)	(4)																																																																(4)							(1)																																																																																																															(1)	(4)																																																																(4)							(1)																																																																																																																																																														(1)	(4)																																																																(4)							(1)
Balance at end of period		4,156	3,471	4,271			1,130	1,288	3,000	2,618	141	146	120	84	120	84					480	558	134	206	346	352			137	124	137	124					749	676	13	56	736	620			630	557	163	184	467	373			617	704	563	634	54	70			12	12			11	11	1	1	963	874			940	847	23	27	24	24			24	23		1	7	7			7	7			108	59			108	59			134	93			134	93			80	75					80	75	210	125			210	125			12	2			12	2			(49)	36			(49)	36			37	42					37	42		(11)	[6]	(115)	(102)	4,156	3,939																											7,284		6,351	1,112	957	6,172	5,954			10		10	14					523		267	223	256	217			355		275	720	80	236			226		180		46				352		254		98				411		126		285	231			161				161				485				485	127			1,384				1,384	1,220			504	593			504	593			2,426	2,907			2,426	2,907									447	423			447	423			446		391					12	12	13							182	145			182	145			100	119			100	119							36	41			36	41			1	[6]	1	[6]	115	[7]	102	[7]	330	318	12	13	318	305			147	132	4,271		4,052	1,130	1,288	3,000	2,618	141	146	120	84	120	84					480	558	134	206	346	352			137	124	137	124					749	676	13	56	736	620			630	557	163	184	467	373			617	704	563	634	54	70			12	12			11	11	1	1	963	874			940	847	23	27	24	24			24	23		1	7	7			7	7			108	59			108	59			134	93			134	93			80	75					80	75	210	125			210	125			12	2			12	2			(49)	36			(49)	36			37	42					37	42		(11)	[6]	(115)	(102)	4,156	3,939																														1,173	944	4,271		4,052	1,130	1,288	3,000	2,618	141	146	120	84	120	84					480	558	134	206	346	352			137	124	137	124					749	676	13	56	736	620			630	557	163	184	467	373			617	704	563	634	54	70			12	12			11	11	1	1	963	874			940	847	23	27	24	24			24	23		1	7	7			7	7			108	59			108	59			134	93			134	93			80	75					80	75	210	125			210	125			12	2			12	2			(49)	36			(49)	36			37	42					37	42		(11)	[6]	(115)	(102)	4,156	3,939																											74	58	12	12	13					182	145			182	145			100	119			100	119			36	41			36	41			1	[6]	1	[6]	115	[7]	102	[7]	330	318	12	13	318	305			281	287	256	4,271		4,052	1,130	1,288	3,000	2,618	141	146	120	84	120	84					480	558	134	206	346	352			137	124	137	124					749	676	13	56	736	620			630	557	163	184	467	373			617	704	563	634	54	70			12	12			11	11	1	1	963	874			940	847	23	27	24	24			24	23		1	7	7			7	7			108	59			108	59			134	93			134	93			80	75					80	75	210	125			210	125			12	2			12	2			(49)	36			(49)	36			37	42					37	42		(11)	[6]	(115)	(102)	4,156	3,939
Defined Benefit Plan Estimated Future Employer Contributions (Numeric) [Abstract]
Amount to be contributed to plan in the next fiscal year		96																																																																																																																																																																																				313																																																																																																															21																																																												6																																																																																																																																																																																							35																																																																																																																																																																																				13
Expected amount of benefit payments in the next period for non-qualified plans		8																																																																																																																																																																																																																																																																																																																																																																																																																																																																																																																																																						3
Recurrence of formal actuarial valuations (in years)																																																																																																																																																																																						3
Percentage of deficit funding requirements permitted to recover in rates																																																																																																																																																																																						75.00%
Estimated Future Benefit Payments (Details) [Abstract]
2014		211																																																																																																																																																																																				387																																																																																																															53																																																												5																																																																																																																																																																																				1			58																																																																																																																																																																																				13																																																	15
2015		222																																																																																																																																																																																				392																																																																																																															55																																																												6																																																																																																																																																																																				2			57																																																																																																																																																																																				13																																																	15
2016		234																																																																																																																																																																																				397																																																																																																															57																																																												6																																																																																																																																																																																				2			60																																																																																																																																																																																				14																																																	15
2017		250																																																																																																																																																																																				402																																																																																																															59																																																												7																																																																																																																																																																																				2			64																																																																																																																																																																																				14																																																	16
2018		264																																																																																																																																																																																				410																																																																																																															62																																																												8																																																																																																																																																																																				2			69																																																																																																																																																																																				15																																																	17
2019-2023		1,545																																																																																																																																																																																				2,128																																																																																																															338																																																												52																																																																																																																																																																																				11			425																																																																																																																																																																																				81																																																	99
Expected Federal Subsidy (Details) [Abstract]
Federal subsidy 2014																																																																																																																																																																																																																																																																																																					1																																																																																																																																																																																																																																																																																																																																																																																																																																							1
Federal subsidy 2015																																																																																																																																																																																																																																																																																																					1
Federal subsidy 2016																																																																																																																																																																																																																																																																																																					1																																																																																																																																																																																																																																																																																																																																																																																																																																							1
Federal subsidy 2017																																																																																																																																																																																																																																																																																																					1
Federal subsidy 2018																																																																																																																																																																																																																																																																																																					1																																																																																																																																																																																																																																																																																																																																																																																																																																							1
Federal subsidy 2019-2023																																																																																																																																																																																																																																																																																																					$ 3																																																																																																																																																																																																																																																																																																																																																																																																																																							$ 2

[1] Allocations exclude consideration of cash for the WKE Bargaining Employees' Retirement Plan and a guaranteed annuity contract held by the LG&E and KU Retirement Plan.

[2] Includes commingled debt funds, which PPL treats as debt securities for asset allocation purposes.

[3] Includes commingled debt funds.

[4] Includes money market funds.

[5] Includes commingled debt funds and debt securities.

[6] Receivables and payables represent amounts for investments sold/purchased but not yet settled along with interest and dividends earned but not yet received.

[7] LKE's other postretirement benefit plan was invested primarily in a 401(h) account as disclosed in the PPL Services Corporation Master Trust.