Contingencies and Regulatory Matters - (Tables)

6 Months Ended

Jun. 30, 2018

Commitments and Contingencies Disclosure [Abstract]

Cost Recovery Clauses

The balance of each regulatory clause recovery on the balance sheet follows:

Regulatory Clause	Balance Sheet Line Item	June 30, 2018		December 31, 2017
		(in millions)
Rate CNP Compliance	Deferred under recovered regulatory clause revenues	$	30	$	17
Rate CNP PPA	Deferred under recovered regulatory clause revenues	11		12
Retail Energy Cost Recovery	Deferred under recovered regulatory clause revenues	80		25
	Under recovered regulatory clause revenues	28		—
Natural Disaster Reserve	Other regulatory liabilities, deferred	30		38

Regulatory clause recovery balances included in the balance sheets are as follows:

Regulatory Clause	Balance Sheet Line Item	June 30, 2018		December 31, 2017
		(in millions)
Fuel Cost Recovery	Under recovered regulatory clause revenues	$	—	$	22
Fuel Cost Recovery	Other regulatory liabilities, current	5		—
Purchased Power Capacity Recovery	Under recovered regulatory clause revenues	2		2
Environmental Cost Recovery(*)	Under recovered regulatory clause revenues	1		2
Energy Conservation Cost Recovery	Other regulatory liabilities, current	1		—

(*) At June 30, 2018 and December 31, 2017, the under recovered balance included in the balance sheets represents the current portion of the regulatory assets associated with projected environmental expenditures of approximately $11 million and $13 million, respectively, partially offset by the over recovered environmental cost recovery balance of approximately $10 million and $11 million, respectively.

Revised Cost and Schedule

Georgia Power's approximate proportionate share of the remaining estimated capital cost to complete Plant Vogtle Units 3 and 4 by the expected in-service dates of November 2021 and November 2022, respectively, is as follows:

	(in billions)
Base project capital cost forecast(a)(b)	$	8.0
Construction contingency estimate	0.4
Total project capital cost forecast(a)(b)	8.4
Net investment as of June 30, 2018(b)	(4.0		)
Remaining estimate to complete(a)	$	4.4

(a) Excludes financing costs expected to be capitalized through AFUDC of approximately $350 million.

(b) Net of $1.7 billion received from Toshiba in 2017 under the Guarantee Settlement Agreement and $188 million in Customer Refunds recognized as a regulatory liability in 2017.