Income Taxes (Tables)

12 Months Ended

Dec. 31, 2014

Income Taxes [Abstract]

Provision (Benefit) For Income Taxes

		2014		2013		2012
	(in millions)
Current:
Federal	$	11	$	(12)	$	16
State		10		1		3
		21		(11)		19
Deferred:
Federal		501		408		(388)
State		2		88		(72)
Foreign		1		1		(2)
		504		497		(462)
Provision (benefit) for income taxes	$	525	$	486	$	(443)

Reconciliation Of Provision For Income Taxes

		2014		2013		2012
	(in millions)
Expected provision (benefit) at federal statutory rate	$	507	$	417	$	(403)
Increase (decrease) resulting from:
State income taxes, net of federal income tax effect		58		53		(44)
Nondeductible expenses		3		3		2
State rate redetermination		(48)		4		2
Other		5		9		–
Provision (benefit) for income taxes	$	525	$	486	$	(443)

Schedule Of Deferred Tax Assets And Liabilities

		2014		2013
	(in millions)
Deferred tax liabilities:
Differences between book and tax basis of property	$	2,504	$	2,115
Derivative activity		122		13
Other		21		11
		2,647		2,139
Deferred tax assets:
Accrued compensation		23		16
Alternative minimum tax credit carryforward		131		77
Stored natural gas		5		9
Accrued pension costs		17		2
Asset retirement obligations		79		54
Net operating loss carryforward		318		412
Differences between book and tax basis of property - state		6		11
Other		8		7
		587		588
Net deferred tax liability	$	2,060	$	1,551

Reconciliation Of Beginning And Ending Balances Of Unrecognized Tax Benefits

		2014
		(in millions)
Unrecognized tax benefits at beginning of period	$	-
Additions based on tax positions related to the current year		15
Additions to tax positions of prior years		29
Settlements		-
Unrecognized tax benefits at end of period	$	44