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Goodwill And Other Intangibles (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Goodwill [Line Items]    
Goodwill $ 16us-gaap_Goodwill $ 16us-gaap_Goodwill
Intangible assets 84us-gaap_IntangibleAssetsNetExcludingGoodwill 33us-gaap_IntangibleAssetsNetExcludingGoodwill
Power [Member]    
Goodwill [Line Items]    
Goodwill 16us-gaap_Goodwill
/ dei_LegalEntityAxis
= pseg_PowerMember		 16us-gaap_Goodwill
/ dei_LegalEntityAxis
= pseg_PowerMember
Intangible assets $ 84us-gaap_IntangibleAssetsNetExcludingGoodwill
/ dei_LegalEntityAxis
= pseg_PowerMember		 $ 33us-gaap_IntangibleAssetsNetExcludingGoodwill
/ dei_LegalEntityAxis
= pseg_PowerMember