Property, Plant and Equipment (Components of PP&E) (Details) (USD $)							12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2013 Electric generation and distribution facilities	Dec. 31, 2012 Electric generation and distribution facilities	Dec. 31, 2013 Electric generation and distribution facilities Minimum	Dec. 31, 2013 Electric generation and distribution facilities Maximum	Dec. 31, 2013 Other buildings	Dec. 31, 2012 Other buildings	Dec. 31, 2013 Other buildings Minimum	Dec. 31, 2013 Other buildings Maximum	Dec. 31, 2013 Furniture, fixtures and equipment	Dec. 31, 2012 Furniture, fixtures and equipment	Dec. 31, 2013 Furniture, fixtures and equipment Minimum	Dec. 31, 2013 Furniture, fixtures and equipment Maximum	Dec. 31, 2013 Other	Dec. 31, 2012 Other	Dec. 31, 2013 Other Minimum	Dec. 31, 2013 Other Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life							6 years	68 years			5 years	50 years			3 years	30 years			1 year	46 years
Electric generation, distribution assets and other	$ 30,596,000,000		$ 30,278,000,000		$ 27,619,000,000	$ 26,385,000,000			$ 1,726,000,000	$ 2,616,000,000			$ 312,000,000	$ 386,000,000			$ 939,000,000	$ 891,000,000
Accumulated depreciation	(9,604,000,000)		(9,145,000,000)
Net electric generation and distribution assets and other	20,992,000,000	[1],[2]	21,133,000,000	[1],[2]
Net electronic generation and distribution assets and other related to held for sale business	1,200,000,000		1,300,000,000
Capitalized computer software, net	$ 133,000,000		$ 141,000,000

[1] Net electric generation and distribution assets and other related to the Company's held-for-sale businesses of $1.2 billion and $1.3 billion as of December 31, 2013 and 2012, respectively, were excluded from the table above and were included in the noncurrent assets of discontinued and held-for-sale businesses in the consolidated balance sheets.

[2] Net electric generation and distribution assets, and other include unamortized internal use software costs of $133 million and $141 million as of December 31, 2013 and 2012, respectively.