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Changes In Capitalization (Details) (USD $) In Millions, unless otherwise specified			3 Months Ended
	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2012 Power [Member]	Mar. 31, 2012 PSE And G [Member]	Mar. 31, 2012 Pollution Control Revenue Bond, 5.00% [Member[ Power [Member]
Long-term debt	$ 7,978	$ 8,094			$ 66
Stated interest rate of debt instrument					5.00%
Cash dividend paid			300
Transition Funding's securitization debt				$ 49

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date. May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

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