Capitalization (Tables)

3 Months Ended

Mar. 31, 2012

Capitalization [Abstract]

Carrying Amounts And Fair Values Of Long-term Debt

(millions of dollars)	March 31, 2012				December 31, 2011
Long-Term Debt (including current portion)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Con Edison	$	11,071	$	12,892	$	10,673	$	12,744
CECONY	$	10,143	$	11,757	$	9,745	$	11,593