Rate and Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2011

Rate and Regulatory Matters [Abstract]

Details of Other regulatory assets included in Entergy Corporation and Subsidiaries

Entergy

	2011		2010
	(In Millions)
Asset Retirement Obligation – recovery dependent upon timing of decommissioning (Note 9) (b)	$	395.9	$	406.4
Deferred capacity (Note 2 – Retail Rate Proceedings – Filings with the LPSC)		—		15.8
Grand Gulf fuel – non-current and power management rider – recovered through rate riders when rates are redetermined periodically (Note 2 – Fuel and purchased power cost recovery)		12.4		17.4
New nuclear generation development costs (Note 2)		56.8		—
Gas hedging costs – recovered through fuel rates		30.3		1.9
Pension & postretirement costs (Note 11 – Qualified Pension Plans, Other Postretirement Benefits, and Non-Qualified Pension Plans) (b)		2,542.0		1,734.7
Postretirement benefits – recovered through 2012 (Note 11 – Other Postretirement Benefits) (b)		2.4		4.8
Provision for storm damages, including hurricane costs – recovered through securitization, insurance proceeds, and retail rates (Note 2 – Storm Cost Recovery Filings with Retail Regulators)		996.4		1,026.0
Removal costs – recovered through depreciation rates (Note 9) (b)		81.2		81.5
River Bend AFUDC – recovered through August 2025 (Note 1 – River Bend AFUDC)		24.3		26.2
Sale-leaseback deferral (Note 10 – Sale and Leaseback Transactions – Grand Gulf Lease Obligations)		—		22.3
Spindletop gas storage facility – recovered through December 2032 (a)		31.0		32.6
Transition to competition costs – recovered over a 15-year period through February 2021		89.2		95.8
Little Gypsy cost proceeding – recovered through securitization (Note 5 – Entergy Louisiana Securitization Bonds – Little Gypsy)		198.4		200.9
Incremental ice storm costs – recovered through 2032		10.5		11.1
Michoud plant maintenance – recovered over a 7-year period through September 2018		12.9		—
Unamortized loss on reacquired debt – recovered over term of debt		108.8		122.5
Other		44.4		38.3
Total	$	4,636.9	$	3,838.2

The amount of deferred fuel costs, that Entergy expects to recover (or return to customers) through fuel mechanisms, subject to subsequent regulatory review

	2011			2010
	(In Millions)
Entergy Arkansas	$	209.8		$	61.5
Entergy Gulf States Louisiana (a)	$	2.9		$	77.8
Entergy Louisiana (a)	$	1.5		$	8.8
Entergy Mississippi	($	15.8	)	$	3.2
Entergy New Orleans (a)	($	7.5	)	($	2.8	)
Entergy Texas	($	64.7	)	($	77.4	)

(a) 2011 and 2010 include $100.1 million for Entergy Gulf States Louisiana, $68 million for Entergy Louisiana, and $4.1 million for Entergy New Orleans of fuel, purchased power, and capacity costs, which do not currently earn a return on investment and whose recovery periods are indeterminate but are expected to be over a period greater than twelve months.

Utility Operating Companies Current Retail Base Rates

Company	Authorized Return on Common Equity
Entergy Arkansas	10.2%	-   Current retail base rates implemented in the July 2010 billing cycle pursuant to a settlement approved by the APSC.
Entergy Gulf States Louisiana	9.9%- 11.4% Electric; 10.0%- 11.0% Gas	-   Current retail electric base rates implemented based on Entergy Gulf States Louisiana’s 2010 test year formula rate plan filing approved by the LPSC. -   Current retail gas base rates reflect the rate stabilization plan filing for the 2010 test year ended September 2010.
Entergy Louisiana	9.45%- 11.05%	-   Current retail base rates based on Entergy Louisiana’s 2010 test year formula rate plan filing approved by the LPSC.
Entergy Mississippi	10.54%- 12.72%	-   Current retail base rates reflect Entergy Mississippi’s latest formula rate plan filing, based on the 2010 test year, and a stipulation approved by the MPSC.
Entergy New Orleans	10.7% - 11.5% Electric; 10.25% - 11.25% Gas	-   Current retail base rates reflect Entergy New Orleans’s 2010 test year formula rate plan filing and a settlement approved by the City Council.
Entergy Texas	10.125%	-   Current retail base rates reflect Entergy Texas’s 2009 base rate case filing and a settlement approved by the PUCT.

Estimate of payments or receipts among utility operating companies

	Payments  or (Receipts)
	(In Millions)
Entergy Arkansas	$	156
Entergy Gulf States Louisiana	($	75	)
Entergy Louisiana	$	—
Entergy Mississippi	($	33	)
Entergy New Orleans	($	5	)
Entergy Texas	($	43	)

Estimate of payments or receipts among utility operating companies production cost based on 2011

	Payments  or (Receipts)
	(In Millions)
Entergy Arkansas	$	37
Entergy Gulf States Louisiana	$	—
Entergy Louisiana	($	37	)
Entergy Mississippi	$	—
Entergy New Orleans	$	—
Entergy Texas	$	—

Estimate of Payments or Receipts among Utility Operating Companies Production Cost Based on 2010

	Payments  or (Receipts)
	(In Millions)
Entergy Arkansas	$	77
Entergy Gulf States Louisiana	($	12	)
Entergy Louisiana	$	—
Entergy Mississippi	($	40	)
Entergy New Orleans	($	25	)
Entergy Texas	$	—

Payments/receipts among the Utility operating companies to achieve rough production cost equalization

	2007 Payments or (Receipts) Based on 2006 Costs			2008 Payments or (Receipts) Based on 2007 Costs			2009 Payments or (Receipts) Based on 2008 Costs			2010 Payments or  (Receipts) Based on 2009 Costs
	(In Millions)
Entergy Arkansas	$	252		$	252		$	390		$	41
Entergy Gulf States Louisiana	($	120	)	($	124	)	($	107	)	$	—
Entergy Louisiana	($	91	)	($	36	)	($	140	)	($	22	)
Entergy Mississippi	($	41	)	($	20	)	($	24	)	($	19	)
Entergy New Orleans	$	—		($	7	)	$	—		$	—
Entergy Texas	($	30	)	($	65	)	($	119	)	$	—