Changes In Capitalization (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Power [Member]
Cash Dividends Paid to Parent Company	$ 375
Contributed Capital	0	8
PSE And G [Member]
Contributed Capital	175	100
Securitization Debt [Member] | PSE And G [Member]
Repayments of Long-term Debt	$ 54