Income Tax (Tables)

12 Months Ended

Dec. 31, 2011

Income Tax [Abstract]

Schedule Of Components Of Income Tax

	Con Edison									CECONY
(millions of dollars)	2011			2010			2009			2011			2010			2009
State
Current	$	56		$	23		$	(12	)	$	53		$	13		$	(1	)
Deferred		63			106			118			55			100			103
Federal
Current		53			(144	)		16			43			(139	)		42
Deferred		434			569			324			413			527			266
Amortization of investment tax credits		(6	)		(6	)		(6	)		(6	)		(6	)		(6	)
Total charge to income tax expense	$	600		$	548		$	440		$	558		$	495		$	404

Schedule Of Differences On Deferred Tax Assets And Liabilities

	Con Edison						CECONY
(millions of dollars)	2011			2010			2011			2010
Deferred tax liabilities:
Depreciation	$	3,699		$	3,083		$	3,464		$	2,915
Regulatory asset – future income tax		1,971			1,760			1,891			1,666
Unrecognized pension and other postretirement costs		2,554			1,775			2,255			1,686
State income tax		892			759			811			677
Capitalized overheads		536			508			470			444
Pension		682			625			709			638
Investment tax credits		55			61			52			58
Other		696			720			467			448
Total deferred tax liabilities		11,085			9,291			10,119			8,532
Deferred tax assets:
Unrecognized pension and other postretirement costs		2,554			1,775			2,255			1,686
Regulatory liability – future income tax		173			168			167			152
Other		1,061			741			933			623
Total deferred tax assets		3,788			2,684			3,355			2,461
Net deferred tax liabilities and investment tax credits	$	7,297		$	6,607		$	6,764		$	6,071
Deferred tax liabilities and investment tax credits – Non current	$	7,563		$	6,769		$	6,921		$	6,202
Deferred tax assets – Current		(266	)		(162	)		(157	)		(131	)
Total deferred tax liabilities and investment tax credits	$	7,297		$	6,607		$	6,764		$	6,071

Schedule Of Income Tax Reconciliation

	Con Edison									CECONY
(% of Pre-tax income)	2011			2010			2009			2011			2010			2009
STATUTORY TAX RATE
Federal		35	%		35	%		35	%		35	%		35	%		35	%
Changes in computed taxes resulting from:
State income tax		5			5			5			5			5			6
Depreciation related differences		—			—			1			—			—			1
Cost of removal		(4	)		(4	)		(5	)		(4	)		(4	)		(6	)
Other		—			(1	)		(3	)		—			(1	)		(2	)
Effective Tax Rate		36	%		35	%		33	%		36	%		35	%		34	%

Summary Of Unrecognized Tax Benefits

	Con Edison									CECONY
(millions of dollars)	2011			2010			2009			2011			2010			2009
Balance at the beginning of the year	$	93		$	86		$	118		$	79		$	92		$	108
Additions based on tax positions related to the current year		76			5			—			74			4			—
Additions based on tax positions of prior years		4			67			3			3			49			1
Reductions for tax positions of prior years		(43	)		(4	)		(21	)		(42	)		(4	)		(5	)
Settlements		—			(61	)		(14	)		—			(62	)		(12	)
Balance at the end of the year	$	130		$	93		$	86		$	114		$	79		$	92