Contingencies and Regulatory Matters (Tables)

9 Months Ended

Sep. 30, 2014

Commitments and Contingencies Disclosure [Abstract]

Schedule of Recovery Balance of Each Regulatory Clause

The recovery balance of each regulatory clause follows:

Regulatory Clause	Balance Sheet Line Item	September 30, 2014		December 31, 2013
		(in millions)
Rate CNP Environmental – Under	Deferred under recovered regulatory clause revenues	$	—	$	7
	Under recovered regulatory clause revenues, current	25		—
Rate CNP PPA – Under	Deferred under recovered regulatory clause revenues	46		18
	Under recovered regulatory clause revenues, current	9		—
Retail Energy Cost Recovery – Over	Other regulatory liabilities, current	44		27
	Deferred over recovered regulatory clause revenues	—		15
Natural Disaster Reserve	Other regulatory liabilities, deferred	87		96

Recovery Position of Each Regulatory Clause

The recovery balance of each regulatory clause follows:

Recovery Clause	Balance Sheet Location	September 30, 2014		December 31, 2013
		(in millions)
Fuel Cost Recovery – Under	Under recovered regulatory clause revenues	$	41.3	$	21.0
Purchased Power Capacity Recovery – Over	Other regulatory liabilities, current	6.8		—
Purchased Power Capacity Recovery – Under	Under recovered regulatory clause revenues	—		2.8
Environmental Cost Recovery – Under	Under recovered regulatory clause revenues	6.3		14.4
Energy Conservation Cost Recovery – Under	Under recovered regulatory clause revenues	2.6		7.0

Current And Actual Cost Estimate for Kemper IGCC

Mississippi Power's 2010 project estimate, current cost estimate, and actual costs incurred as of September 30, 2014 for the Kemper IGCC are as follows:

Cost Category	2010 Project Estimate(f)		Current Estimate		Actual Costs at September 30, 2014
	(in billions)
Plant Subject to Cost Cap(a)	$	2.40	$	4.86	$	4.06
Lignite Mine and Equipment	0.21		0.23		0.23
CO2 Pipeline Facilities	0.14		0.11		0.10
AFUDC(b)(c)	0.17		0.62		0.41
Combined Cycle and Related Assets Placed in Service – Incremental(d)	—		—		—
General Exceptions	0.05		0.10		0.07
Regulatory Asset(c)(e)	—		0.18		0.10
Total Kemper IGCC(a)(c)	$	2.97	$	6.10	$	4.97

(a) The 2012 MPSC CPCN Order approved a construction cost cap of up to $2.88 billion, net of the DOE Grants and excluding the Cost Cap Exceptions. The Current Estimate and Actual Costs include non-incremental operating and maintenance costs related to the combined cycle and associated common facilities placed in service in August 2014 that are subject to the $2.88 billion cost cap.

(b) Mississippi Power's original estimate included recovery of financing costs during construction rather than the accrual of AFUDC. This approach was not approved by the Mississippi PSC in 2012 as described in "Rate Recovery of Kemper IGCC Costs."

(c) Amounts in the Current Estimate reflect costs through March 31, 2016.

(d) Incremental operating and maintenance costs related to the combined cycle and associated common facilities placed in service on August 9, 2014, net of costs related to energy sales.

(e) The 2012 MPSC CPCN Order approved deferral of non-capital Kemper IGCC-related costs during construction as described in "Rate Recovery of Kemper IGCC Costs – Regulatory Assets and Liabilities."

(f) The 2010 Project Estimate is the certificated cost estimate adjusted to include the certificated estimate for the CO₂ pipeline facilities which was approved in 2011 by the Mississippi PSC.