SCHEDULE I - CONDENSED UNCONSOLIDATED BALANCE SHEETS (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current Assets
Cash and cash equivalents	$ 1,102	$ 901	$ 1,202	$ 925
Accounts receivable	923	745
Other current assets	37	19
Total Current Assets	5,153	5,068
Other Noncurrent Assets
Other noncurrent assets	357	637
Total Other Noncurrent Assets	7,112	7,775
Total Assets	46,259	43,634
Current Liabilities
Short-term debt	701	652
Taxes	114	90
Other current liabilities	998	1,219
Total Current Liabilities	4,912	5,625
Long-term Debt
Long-term Debt	20,592	18,725
Total Deferred Credits and Other Noncurrent Liabilities	8,289	8,786
L G And E And K U Energy L L C Unconsolidated [Member]
Current Assets
Cash and cash equivalents	6		2	2
Accounts receivable	2
Accounts receivable from affiliates	11	4
Notes receivable from affiliates	1,682	1,560
Other current assets	10	1
Total Current Assets	1,711	1,565
Investments
Affiliated companies at equity	4,519	4,096
Other Noncurrent Assets
Deferred income taxes	170	184
Other noncurrent assets	6	7
Total Other Noncurrent Assets	176	191
Total Assets	6,406	5,852
Current Liabilities
Short-term debt	75
Notes payable to affiliates		25
Accounts payable to affiliates	843	906
Taxes	12	8
Other current liabilities	6	6
Total Current Liabilities	936	945
Long-term Debt
Long-term Debt	1,121	1,121
Notes payable to affiliates	196
Total Long-term Debt	1,317	1,121
Total Deferred Credits and Other Noncurrent Liabilities	3
Members Equity	4,150	3,786
Total Liabilities and Equity	$ 6,406	$ 5,852