COMMITMENTS AND CONTINGENCIES	6 Months Ended
COMMITMENTS AND CONTINGENCIES	Jun. 30, 2018
Statement [Line Items]
Commitments and Contingencies Disclosure [Text Block]	COMMITMENTS AND CONTINGENCIES Abandoned Nuclear Project SCE&G, on behalf of itself and as agent for Santee Cooper, entered into the EPC Contract with the Consortium in 2008 for the design and construction of Unit 2 and Unit 3. Various difficulties were encountered which affected the ability of the Consortium to adhere to established budgets and construction schedules for the Nuclear Project and which, in light of Santee Cooper's decision to suspend construction of the Nuclear Project, led to the Company's decision on July 31, 2017 to stop the construction and seek recovery under the abandonment provisions of the BLRA. These difficulties and other developments occurring prior to the bankruptcy filing by WEC and WECTEC and other matters are described in Note 10 to the consolidated financial statements included in the Company's and Consolidated SCE&G's combined Form 10-K for the year ended December 31, 2017. Significant developments and continuing contingencies regarding the abandoned Nuclear Project subsequent to December 31, 2017 are discussed below. EPC Contract and BLRA Matters Contractor Bankruptcy Proceedings and Related Uncertainties On March 29, 2017, WEC and WECTEC, the two members of the Consortium, and certain of their affiliates filed petitions for protection under Chapter 11 of the U.S. Bankruptcy Code, citing a liquidity crisis arising from project contract losses attributable to the Nuclear Project and similar units being built for an unaffiliated company as a material factor that caused WEC and WECTEC to seek protection under the bankruptcy laws. As part of such filing, WEC and WECTEC publicly announced their inability to complete Unit 2 and Unit 3 under the terms of the EPC Contract. On September 1, 2017, SCE&G, for itself and as agent for Santee Cooper, filed with the Bankruptcy Court Proofs of Claim for unliquidated damages against each of WEC and WECTEC. These Proofs of Claim are based upon the anticipatory repudiation and material breach by the Consortium of the EPC Contract, and assert against WEC and WECTEC any and all claims that are based thereon or that may be related thereto. These claims were sold to Citibank on September 27, 2017 as part of a monetization transaction discussed below. Notwithstanding the sale of the claims, SCE&G and Santee Cooper remain responsible for any claims that may be made by WEC and WECTEC against them relating to the EPC Contract. WEC’s Reorganization Plan was confirmed by the Bankruptcy Court on March 28, 2018, and became effective August 1, 2018. In connection with the effectiveness of the Reorganization Plan, the EPC Contract was deemed rejected. Initially, WEC had projected that its Reorganization Plan would pay in full or nearly in full its pre-petition trade creditors, including several of the WEC Subcontractors which have alleged non-payment by the Consortium for amounts owed for work performed on the Nuclear Project and have filed liens on property in Fairfield County, South Carolina, where Unit 2 and Unit 3 were to be located (Unit 2/3 Property). SCE&G is contesting approximately $290 million of filed liens in Fairfield County. Most of these asserted liens are “pre-petition” claims that relate to work performed by WEC Subcontractors before the WEC bankruptcy, although some of them are “post-petition” claims arising from work performed after the WEC bankruptcy. WEC has now indicated that some unsecured creditors have sought or may seek amounts beyond what WEC allocated when it submitted the Reorganization Plan. If any unsecured creditor is successful in its attempt to include its claim as part of the class of general unsecured creditors beyond the amounts in the Reorganization Plan allocated by WEC, it is possible that the Reorganization Plan will not provide for payment in full or nearly in full to its pre-petition trade creditors. The shortfall could be significant. See also discussion below regarding limitations with respect to SCE&G’s pre-petition lien obligations arising from its monetization of the Toshiba Settlement. SCE&G and Santee Cooper are responsible for amounts owed to WEC for valid work performed by WEC Subcontractors on the Nuclear Project after the WEC bankruptcy filing (i.e., post-petition). While SCE&G and Santee Cooper funded amounts to WEC for such post-petition obligations on a weekly basis, SCE&G and Santee Cooper remain obligated to the extent amounts owed exceed (1) the amounts advanced to WEC for such purposes while the IAA was in effect or (2) the amounts held by WEC after the IAA was terminated. SCE&G intends to oppose any previously unasserted claim that is asserted against it, whether directly or indirectly by a claim through the IAA. Some WEC Subcontractors have made claims against SCE&G and Santee Cooper for damages the WEC Subcontractors claim arose after termination of the IAA. SCE&G intends to oppose these claims. To the extent any such claim is determined to be valid, SCE&G may be responsible for paying its 55% share thereof. Toshiba Settlement and Subsequent Monetization Payment and performance obligations under the EPC Contract are joint and several obligations of WEC and WECTEC. In 2015 Toshiba, WEC’s parent company, reaffirmed its guaranty of WEC’s payment obligations. In satisfaction of such guaranty obligations, on July 27, 2017, the Toshiba Settlement was executed under which Toshiba was to make periodic settlement payments beginning in October 2017 in the total amount of approximately $2.2 billion ($1.2 billion for SCE&G’s 55% share), subject to certain offsets for payments by WEC in bankruptcy that would have the effect of satisfying the liens discussed above and below. In September and October 2017, proceeds totaling approximately $1.997 billion were received in full satisfaction of the Toshiba Settlement ($1.098 billion for SCE&G's 55% share). The proceeds were obtained through the receipt of a payment from Toshiba and a payment from Citibank arising from its purchase of all other scheduled payments, including amounts related to the contractor liens discussed below. The purchase agreement with Citibank provides that SCE&G and Santee Cooper (each according to its pro rata share) would indemnify Citibank for its losses arising from misrepresentations or covenant defaults under the purchase agreement. SCE&G and Santee Cooper also assigned their claims under the WEC bankruptcy process to Citibank, and agreed to use commercially reasonable efforts to cooperate with Citibank and provide reasonable support necessary for its enforcement of those claims. The proceeds received under or arising from the monetization of the Toshiba Settlement are recorded as a regulatory liability on the accompanying condensed consolidated balance sheets, as the net value of the proceeds will be utilized to benefit SCE&G's customers in a manner to be determined by the SCPSC. As described above, several WEC Subcontractors have filed liens against the Unit 2/3 Property, which SCE&G is contesting. Payments under the Toshiba Settlement are subject to reduction if WEC pays WEC Subcontractors holding pre-petition liens directly. Under these circumstances, SCE&G and Santee Cooper, each in its pro rata share, would be required to make Citibank whole for the reduction. On January 2, 2018, the purchase agreement with Citibank was amended to limit the amount that SCE&G and Santee Cooper could be required to reimburse Citibank for valid subcontractor and vendor pre-petition liens to $60 million ($33 million for SCE&G's 55% share). Regulatory, Political and Legal Developments In September 2017, the Company was served with a subpoena issued by the United States Attorney’s Office for the District of South Carolina seeking documents relating to the Nuclear Project. The subpoena requires the Company to produce a broad range of documents related to the project. Also, SLED is conducting a criminal investigation into the handling of the Nuclear Project by SCANA and SCE&G. In October 2017, the staff of the SEC's Division of Enforcement also issued a subpoena for documents related to an investigation they are conducting related to the Nuclear Project. These investigations are ongoing, and the Company and Consolidated SCE&G intend to fully cooperate with them. Also in connection with the abandonment of the Nuclear Project, various state and local governmental authorities have attempted and may further attempt to challenge, reverse or revoke previously-approved tax or economic development incentives, benefits or exemptions and have attempted and may further attempt to apply such actions retroactively. No assurance can be given as to the timing or outcome of these matters. See Claims and Litigation for a description of specific challenges. On September 26, 2017, the South Carolina Office of Attorney General issued an opinion stating, among other things, that "as applied, portions of the BLRA are constitutionally suspect," including the abandonment provisions. Also on September 26, 2017, and in reliance on the opinion from the Office of Attorney General, the ORS filed the Request seeking an order from the SCPSC directing SCE&G to immediately suspend all revised rates collections from customers which were previously approved by the SCPSC pursuant to the authority of the BLRA. In the Request, the ORS noted the existence of an allegation that SCE&G failed to disclose information to the ORS, which the ORS believes should have been disclosed, that would have appeared to provide a basis for challenging prior requests, and asserted that SCE&G should not be allowed to continue to benefit from nondisclosure. The ORS also asked for an order that, if the BLRA is found to be unconstitutional or the South Carolina General Assembly amends or revokes the BLRA, then SCE&G should make credits to future bills or refunds to customers for prior revised rates collections. On October 17, 2017, the ORS filed a motion with the SCPSC to amend the Request, in which motion the ORS asked the SCPSC to consider the most prudent manner by which SCE&G will enable its customers to realize the value of the monetized Toshiba Settlement payments and other payments made by Toshiba towards satisfaction of its obligations to SCE&G. On December 20, 2017, the SCPSC denied a motion by SCE&G to dismiss the Request and the SCPSC requested that the ORS carry out an inspection, audit and examination of SCE&G's revenue requirements to assist the SCPSC in determining whether SCE&G's present schedule of rates is fair and reasonable. Parties who have intervened in the Request or who filed a letter in support of it include the state's Governor, Office of Attorney General and Speaker of the House of Representatives, the Electric Cooperatives of South Carolina, Santee Cooper, the SCEUC, certain large industrial customers, and several environmental groups. The SCPSC has scheduled a hearing on the Joint Petition and two other dockets related to the Nuclear Project, namely the Request by the ORS and a June 2017 complaint filed by the Friends of the Earth and the Sierra Club, to begin November 1, 2018. This schedule was established in response to legislation described below. SCE&G intends to continue vigorously contesting the Request, but cannot give any assurance as to the timing or outcome of this matter. See also Note 2. In 2017, special committees of the South Carolina General Assembly, both in the House of Representatives and in the Senate, conducted public hearings regarding the Company's decision to abandon the Nuclear Project. Several legislative proposals adverse to the Company and Consolidated SCE&G resulted from the work of these committees, two of which became law in 2018 and are described below. On June 27, 2018, the South Carolina General Assembly adopted Act 258, which became law June 28, 2018, to temporarily reduce the amount SCE&G can collect from customers under the BLRA. Act 258 requires the SCPSC to order a reduction in the portion of SCE&G's retail electric rates associated with the Nuclear Project from approximately 18% of the average residential electric customer’s bill to approximately 3.2%, or a reduction of approximately $31 million per month, retroactive to April 1, 2018. Absent an earlier ruling from the SCPSC, which could be issued only on the SCPSC’s own initiative, these lower rates are to be effective until the SCPSC renders a final decision on the merits of the Joint Petition. On July 2 and 3, 2018, the SCPSC issued orders implementing the temporary rate reduction required by Act 258. Unless the relief discussed in the next paragraph is granted, the new rates and retroactive credits required by Act 258 are to be put into effect with the first billing cycle of August 2018. Retroactive credits for billed and unbilled amounts for the period April 1, 2018 through June 30, 2018 total approximately $109.3 million, which amount has been deferred within Revenue subject to refund on the condensed consolidated balance sheet of the Company and Consolidated SCE&G. The initial recognition of such retroactive credits includes the effects of cycle billing on unbilled usage. In addition to the reduction of electric rates (which rates had been previously approved by the SCPSC), Act 258 alters various procedures previously applicable under the BLRA, including redefining the standard of care required by the BLRA and supplying definitions of key terms that would affect the evidence required to establish SCE&G’s ability to recover its costs associated with the Nuclear Project. On June 29, 2018, SCE&G filed a lawsuit in the District Court challenging the constitutionality of Act 258 along with joint resolution S. 954, which became law on July 2, 2018. Among other things, S. 954 prohibits the SCPSC from holding a hearing on the merits of the Joint Petition before November 1, 2018, and requires it to issue an order on the merits of the Joint Petition by December 21, 2018. In the lawsuit, which was subsequently amended, SCE&G seeks a declaration that the new laws are unconstitutional and asks the court to issue an injunction prohibiting the SCPSC from implementing Act 258. A hearing on SCE&G’s motion for the issuance of a preliminary injunction was held July 30-31, 2018. Dominion Energy and Sedona would not be obligated to complete the pending merger with SCANA if Act 258 remains in effect and is implemented. The Company and Consolidated SCE&G cannot predict the timing or outcome of this matter. Proposals to Resolve Outstanding Issues On November 16, 2017, SCE&G announced for public consideration a proposal to resolve outstanding issues relating to the Nuclear Project. Under the proposal, SCE&G electric customers were to receive a 3.5% electric rate reduction, the addition of an existing 540-MW natural gas fired power plant by SCE&G with the acquisition cost borne by SCANA shareholders, and the addition of approximately 100-MW of large scale solar energy by SCE&G. The proposal also provided for the recovery of the nuclear construction costs (net of the proceeds of the Toshiba Settlement not utilized for liquidation of project liens) over 50 years. While SCE&G’s proposal was not formally submitted for regulatory approval at that time, discussions with key stakeholders over the ensuing weeks indicated that SCE&G's proposal would not be sufficient to resolve the outstanding issues. On January 2, 2018, SCANA entered into the Merger Agreement with Dominion Energy, and on January 12, 2018, SCE&G and Dominion Energy filed the Joint Petition requesting SCPSC approval of the merger or a finding that either the merger is in the public interest or that there is an absence of harm arising from the merger. In this petition, the parties commit to providing an up-front, one time rate credit to SCE&G's electric customers totaling approximately $1.3 billion within 90 days of the merger's closing, providing at least a 5% reduction in customer bills (later adjusted to approximately 7% in light of the effects of the Tax Act), shortening the amortization period for costs related to the Nuclear Project to 20 years, forgoing recovery of approximately $1.7 billion in costs related to the Nuclear Project, and to SCE&G's purchasing an existing 540-MW natural gas fired power plant with no initial investment borne by customers. The SCPSC is scheduled to hold a hearing on the Joint Petition beginning on November 1, 2018, and as noted above, pursuant to S. 954 the SCPSC is required to issue an order related to the Joint Petition no later than December 21, 2018. No assurance can be given as to the timing or outcome of efforts to consummate the Merger Agreement or to obtain approval of the Joint Petition. On May 9, 2018, SCE&G completed its purchase of CEC, the existing 540-MW natural gas fired power plant referred to above, for approximately $180 million. As disclosed in Note 10 to the Company's and Consolidated SCE&G's Form 10-K for December 31, 2017, an impairment loss recorded in the fourth quarter of 2017 included $180 million related to SCE&G's commitment to not seek recovery from customers for the acquisition cost of this natural gas fired power plant, and accordingly, this amount was recorded as a reduction to unrecovered Nuclear Project costs within regulatory assets on the Company's and Consolidated SCE&G's consolidated balance sheets at December 31, 2017. As indicated above, the cost of the plant is being borne by SCANA shareholders. As such, the Company's and Consolidated SCE&G's condensed consolidated balance sheet as of June 30, 2018 reflect the cost for CEC within Utility Plant in Service, and the $180 million impairment initially recorded as unrecovered Nuclear Project costs within regulatory assets is now reflected within Accumulated Depreciation and Amortization, which results in the carrying value of CEC being entirely written off. SCE&G’s commitment to not seek recovery from customers for the acquisition cost of CEC was one element of certain broader rate mitigation proposals contained within the Joint Petition. Assuming that the SCPSC approves either of the mitigating proposals as outlined in the Joint Petition, SCE&G will not seek recovery of CEC acquisition costs. Impairment Considerations At June 30, 2018, SCE&G estimated that revised rates collections previously approved under the BLRA totaled approximately $445 million annually. SCE&G estimates that such revised rates collections for 2018 would be reduced by approximately $279 million if Act 258 remains in effect and is implemented through December 21, 2018, which is the expected pendency of the SCPSC proceeding with respect to the Joint Petition and related dockets. This reduction is comprised of the retroactive credits described above of approximately $109.3 million which are recorded as revenues subject to refund, with the remainder being related to revenues subject to refund that SCE&G expects to collect in July 2018 and lower revised rates during the period from the first billing cycle in August 2018 until the date new rates take effect. Such new rates would take effect after the SCPSC issues an order on the Joint Petition and other related matters pending before it, which order is to be issued no later than December 21, 2018. On a cumulative basis, at June 30, 2018, SCE&G estimated that revised rates collections previously approved under the BLRA totaled approximately $2.1 billion. Such estimates include the approximately $109.3 million of revenues subject to refund. On June 28, 2018, SCANA's Board of Directors declared a dividend of $0.1237 per share payable on July 18, 2018 to shareholders of record on July 10, 2018. This quarterly cash dividend reflects a reduction from the $0.6125 per share paid on SCANA’s common stock for the first quarter of 2018. The approximately eighty percent reduction in the dividend corresponds to the portion of the dividend attributable to SCE&G's electric operations and serves to partially mitigate the liquidity impacts arising from the reduced revenues resulting from the implementation of Act 258. Under the current regulatory construct in South Carolina, pursuant to the BLRA or through other means, the ability of SCE&G to recover costs incurred in connection with Unit 2 and Unit 3, and a reasonable return on them, will be subject to review and approval by the SCPSC. In light of the contentious nature of activity involving the General Assembly and other officials and the Request being considered by the SCPSC that could result in the suspension of all rates currently being collected under the BLRA, as well as the return of such amounts previously collected, there is significant uncertainty as to SCE&G’s ultimate ability to recover its costs of Unit 2 and Unit 3 and a return on them from its customers. SCE&G continues to contest the specific challenges described above. However, based on the consideration of those challenges, and particularly in light of SCE&G's proposed solution announced on November 16, 2017 and details in the Joint Petition filed by SCE&G and Dominion Energy with the SCPSC on January 12, 2018, the Company and Consolidated SCE&G determined that a disallowance of recovery of part of the cost of the abandoned Nuclear Project is both probable and reasonably estimable under applicable accounting guidance. In addition, the Company and Consolidated SCE&G determined that full recovery of certain other related costs deferred within regulatory assets is less than probable. As a result, in 2017 the Company and Consolidated SCE&G recognized a pre-tax impairment loss totaling $1.118 billion ($690 million net of tax). Also, in the first quarter of 2018, the Company and Consolidated SCE&G recognized an additional pre-tax impairment loss of approximately $3.6 million ($2.7 million net of tax) in order to further reduce to estimated fair value the carrying value of nuclear fuel which had been acquired for use in Unit 2 and Unit 3. It is reasonably possible that a change in estimated impairment loss could occur in the near term and could be material; however, all such changes cannot be reasonably estimated. The impairment loss recorded in 2017 reflects impacts similar to those that would have resulted had the proposed solution announced on November 16, 2017 been implemented. If the merger benefits and cost recovery plan outlined in the Joint Petition are implemented (upon closing of the merger as contemplated in the Merger Agreement), an additional impairment loss and other charges totaling as much as approximately $1.7 billion (approximately $1.3 billion net of tax) would be expected to be recorded. This additional impairment loss would result from the write-off of unrecovered Nuclear Project costs of approximately $842 million recorded within regulatory assets and the recording of additional liabilities for customer refunds totaling approximately $1.875 billion, net of approximately $1.065 billion, which amount represents the monetization of guaranty settlement recorded within regulatory liabilities less amounts that may be required to settle contractor liens. If (i) the SCPSC does not approve the Joint Petition and instead approves the Request by the ORS; (ii) the BLRA is found to be unconstitutional; or (iii) the General Assembly further amends or revokes the BLRA or approves other legislation with a similar effect, the Company and Consolidated SCE&G may be required to record an additional impairment loss and other charges totaling as much as approximately $4.9 billion (approximately $3.7 billion net of tax). This additional impairment loss would result from the write-off of approximately $3.962 billion in regulatory assets (comprised of remaining unrecovered Nuclear Project costs of $4.142 billion offset by $180 million in previously impaired costs related to CEC, which would result from the proposals put forward in the Joint Petition not being approved by the SCPSC) and the refund of revised rates collections under the BLRA described above of approximately $2.0 billion (comprised of the $2.1 billion revised rates collections on a cumulative basis as of June 30, 2018, offset by $109.3 million of such collections that have been recorded as revenue subject to refund), net of the monetization of guaranty settlement recorded within regulatory liabilities less amounts that may be required to settle contractor liens. While Act 258 requires the Company and Consolidated SCE&G to refund certain revenues collected from customers beginning April 1, 2018, the Company and Consolidated SCE&G do not currently anticipate that any amounts collected prior to April 1, 2018, will be subject to refund (other than amounts arising due to the effects of the Tax Act); however, no assurance can be given as to the outcome of this matter. At June 30, 2018, the Company and Consolidated SCE&G included considerations of the impact of Act 258 in the evaluation as to their ability to recover the remaining Nuclear Project costs and a reasonable return on those costs. Because Act 258 explicitly provides for an experimental rate that is temporary and does not disallow any of the costs currently deferred as a regulatory asset, and because the experimental rate is to be replaced by rates that the SCPSC is to determine and order no later than December 21, 2018, the Company and Consolidated SCE&G have concluded that the recording of additional impairment charges related to unrecovered Nuclear Project costs would not be appropriate at this time. However, if a disallowance were ordered or the rates under Act 258 were made other than temporary by the SCPSC in the Joint Petition proceeding, the Company and Consolidated SCE&G would reevaluate this conclusion. Were a disallowance ordered or were the rates under Act 258 made other than temporary following the SCPSC's final decision on the Joint Petition, and without consideration of any other factors that may be embodied in such an order, an additional pre-tax impairment charge totaling as much as approximately $1.7 billion may be required. Liquidity Considerations As a result of the legislative and regulatory reactions to the decision to stop construction of Unit 2 and Unit 3, downgrades by credit ratings agencies occurred. The Company and Consolidated SCE&G have significant obligations that must be paid within the next 12 months, including long-term debt maturities and capital lease payments of $568 million for the Company (including $564 million for Consolidated SCE&G), short-term borrowings of $517 million for the Company (including $457 million for Consolidated SCE&G), interest payments of approximately $318 million for the Company (including $238 million for Consolidated SCE&G), future minimum payments for operating leases of $11 million for the Company (including $3 million for Consolidated SCE&G), and revenues collected subject to refund arising from the effects of the Tax Act of approximately $55 million for the Company (including $46 million for Consolidated SCE&G). Working capital requirements, such as those for fuel supply and similar obligations, also arise due to the lag between when such amounts are paid and when related collection of such costs through customer rates occurs. In addition, as described above under Impairment Considerations, SCE&G has been ordered to reduce revised rates previously approved under the BLRA by approximately $279 million in 2018. This reduction assumes that Act 258 remains in effect and is implemented through December 21, 2018, which is the expected pendency of the SCPSC proceeding with respect to the Joint Petition and related dockets, and would include a refund of approximately $109.3 million previously recorded for the period April 1 through June 30, 2018. During the pendency of SCE&G's lawsuit filed June 29, 2018 in the District Court, as amended, SCE&G may be required to escrow funds or to secure a bond corresponding to the amount it may be required to refund if its lawsuit is unsuccessful. In addition, any adverse final judgment by a court in any matter of litigation, or any levy for amounts assessed by a regulatory agency, including but not limited to matters described in Claims and Litigation, could require the Company and/or Consolidated SCE&G to escrow funds or to post one or more bonds equal to the monetary amount of the judgment or assessment while the decision is being appealed or challenged. Management believes as of the date of issuance of these financial statements that it has access to available sources of cash to pay obligations when due over the next 12 months. These sources include committed, long-term lines of credit that expire in December 2020 totaling $1.8 billion for the Company (including $1.2 billion for Consolidated SCE&G). In addition, as of the date of issuance of these financial statements, SCE&G continues to collect the BLRA-related customer rates that remain after reductions ordered as a result of Act 258, as well as amounts provided for in other orders related to non-BLRA electric and gas rates. In 2018, however, certain of SCANA's credit ratings have fallen below investment grade, which has constrained its ability and that of Fuel Company to issue commercial paper. Regulatory and legislative proceedings described above, and/or proceedings described under Claims and Litigation below, which are outside of the Company’s and Consolidated SCE&G’s control, may result in the temporary or permanent suspension of all or a portion of the approximately $445 million annually of rates being collected currently under the BLRA, the return of such amounts collected through June 30, 2018, of $2.1 billion, or the requirement that SCE&G's share of payments received from the Toshiba Settlement ($1.098 billion) be placed in escrow or be refunded to customers in the near term. Neither the Company nor Consolidated SCE&G can predict if or when these matters may be resolved or what additional actions, if any, may be proposed or taken, including other legislative or regulatory actions related to the BLRA or other litigation. Were the SCPSC to grant the relief sought by the ORS in the Request or grant similar relief resulting from legislative action, and as further discussed above in Impairment Considerations, an additional impairment loss or other charges totaling as much as approximately $4.9 billion (approximately $3.7 billion net of tax) may be required. Such an impairment loss or other charges would further stress the Company’s and Consolidated SCE&G’s debt to total capitalization ratio and may result in the Company’s and Consolidated SCE&G’s ratio of debt to total capitalization exceeding maximum levels prescribed in their respective credit agreements. Such an event likely would limit the Company’s and Consolidated SCE&G’s ability to borrow under their commercial paper programs and credit facilities and their ability to pay future dividends or may trigger events of default under such agreements. Known and knowable conditions and events when considered in the aggregate as of the date of issuance of these financial statements do not suggest it is probable that the Company and Consolidated SCE&G will not be able to meet obligations as they come due over the next 12 months. However, possible future actions, including but not limited to actions related to the disallowance of all or part of the remaining unrecovered nuclear regulatory asset, rate reductions, refunds or lawsuits, could have a material adverse impact on the Company’s and Consolidated SCE&G’s financial condition, liquidity, results of operations and cash flows such that management’s conclusion with respect to its ability to pay obligations when due could change. Claims and Litigation Following the Company’s decision to stop construction of Unit 2 and Unit 3, purported derivative and class action lawsuits have been filed in multiple state circuit courts and federal district court on behalf of customers, shareholders and SCANA (in the case of the derivative shareholder actions), against SCANA, SCE&G, or both, and in certain cases some of their officers and/or directors. The plaintiffs allege various causes of action, including but not limited to waste, breach of fiduciary duty, negligence, unfair trade practices, unjust enrichment, conspiracy, fraud, constructive fraud, misrepresentation and negligent misrepresentation, promissory estoppel, constructive trust, and money had and received, among other causes of action. Plaintiffs generally seek compensatory and consequential damages and statutory treble damages and such further relief as the court deems just and proper. In addition, certain plaintiffs seek a declaration that SCE&G may not charge its customers to reimburse itself for past and continuing costs of the Nuclear Project. Certain plaintiffs also seek to freeze or appoint a receiver for certain of SCE&G’s assets, including all money SCE&G has received under the Toshiba payment guaranty and related settlement agreement and money to be collected from customers for the Nuclear Project. Purported class action lawsuits have been filed on behalf of investors in federal court against SCANA and certain of its current and former executive officers and directors. The plaintiffs allege, among other things, that defendants violated Section 10(b) of the Exchange Act and Rule 10b-5 promulgated thereunder and RICO. In addition, one plaintiff alleges that director defendants violated Section 14(a) of the Exchange Act and SEC Rule 14a-9 by allowing or causing misleading proxy statements to be issued. The plaintiffs in each of these suits seek compensatory and consequential damages and such further relief as the court deems proper. The plaintiffs also allege, among other things, that defendants violated their fiduciary duties to shareholders by executing a merger agreement that unfairly deprived plaintiffs of the true value of their SCANA stock, and that Dominion Energy and Sedona aided and abetted these actions. Among other remedies, the plaintiffs seek to enjoin the merger and rescind the Merger Agreement or to have the Merger Agreement amended to provide more favorable terms for plaintiffs, monetary damages, attorneys' fees and such further relief as the court deems proper. Lawsuits seeking class action status have also been filed on behalf of investors and shareholder derivative actions have been filed in the Court of Common Pleas in the Counties of Lexington and Richland, South Carolina, against SCANA, its CEO and directors, Dominion Energy and Sedona. Following removal of certain of these class action lawsuits and shareholder derivative actions from state courts to federal court and remand from the District Court back to state courts, in at least one instance such action was appealed to the United States Court of Appeals for the Fourth Circuit on July 26, 2018 by Dominion Energy. On July 13, 2018, SCANA’s Board of Directors elected two new, independent directors and exercised its right under South Carolina corporate law to form a Special Litigation Committee comprised solely of these newly elected members ("SLC") to investigate the claims asserted against current and former officers and directors of SCANA in derivative shareholder actions and related actions ("Derivative Litigation") and to determine SCANA’s best interests with respect to these actions. On July 24, 2018, SCANA, acting at the direction of the SLC, filed a motion to stay all federal court proceedings in the Derivative Litigation (In Re SCANA Corporation Derivative Litigation) to allow time for the SLC to conduct an independent investigation into the facts and circumstances giving rise to the Derivative Litigation, and to determine what course of action is in the best interests of SCANA and its shareholders with respect to the Derivative Litigation (e.g., prosecution of the claims in the name of SCANA, seeking dismissal of some or all of the claims, or taking other remedial actions). A complaint has been filed by Fairfield County against SCE&G making allegations of breach of contract, fraud, negligent misrepresentation, breach of fiduciary duty, breach of the implied duty of good faith and fair dealing, and unfair trade practices related to SCE&G’s termination of the FILOT agreement. Plaintiff seeks injunctive relief to prevent SCE&G from terminating the FILOT agreement; actual and consequential damages; treble damages; punitive damages; and attorneys’ fees. The Company has also been served with subpoenas issued by the United States Attorney’s Office for the District of South Carolina and the staff of the SEC's Division of Enforcement seeking documents relating to the Nuclear Project. Also, SLED is conducting a criminal investigation into the handling of the Nuclear Project by SCANA and SCE&G. These investigations are ongoing, and the Company and Consolidated SCE&G intend to fully cooperate with them. The DOR has initiated an audit of SCE&G's sales and use tax returns for the periods September 1, 2008 through December 31, 2017. The DOR's position is that the exemption for sales and use tax for purchases related to the Nuclear Project should not apply because Unit 2 and Unit 3 will not be placed into service and no electricity will be manufactured for sale. On June 1, 2018, SCE&G received from the DOR a notice of proposed assessment arising from that audit of approximately $410 million, plus interest. While SCE&G intends to protest the proposed assessment, it is reasonably possible that a loss estimated to be as much as $410 million, plus interest, could be incurred, of which SCE&G's proportionate share as a co-owner of the Nuclear Project would be 55%. On July 17, 2018, a case filed in the District Court styled Pennington et al. v. SCANA, Fluor Corporation and Fluor Enterprises was certified as a class action on behalf of persons who were formerly employed at the Nuclear Project. The plaintiffs allege, among other things, that the defendants violated the WARN Act in connection with the decision to stop construction at the Nuclear Project. The plaintiffs allege that the defendants failed to provide adequate advance written notice of their terminations of employment. While SCANA and SCE&G intend to contest this case, it is reasonably possible that a loss estimated to be as much as $75 million could be incurred, due to the likelihood the Fluor defendants would seek indemnification from them, of which SCE&G's proportionate share as a co-owner of the Nuclear Project would be 55%. While the Company and Consolidated SCE&G intend to vigorously contest the lawsuits, claims, and audit positions which have been filed or initiated against them, they cannot predict the timing or outcome of these matters or others that may arise, including any claims that may be asserted by or against Santee Cooper, and adverse outcomes from some of these matters would not be covered by insurance. Except as noted above, the various claims for damages do not specify an amount for those damages and the number of plaintiffs that are ultimately certified in any class action lawsuits is unknown. In addition, each of the cases referred to above is in its early stages. For these reasons, the Company and Consolidated SCE&G (i) have not determined that a loss is probable and (ii) except as noted above, cannot provide any estimate or range of potential loss for these matters at this time. Therefore, no accrual for these potential losses has been included in the condensed consolidated financial statements. However, outcomes could have a material adverse impact on the Company's and Consolidated SCE&G's results of operations, cash flows and financial condition. The Company and Consolidated SCE&G are subject to various other claims and litigation incidental to their business operations which management anticipates will be resolved without a material impact on the Company's and Consolidated SCE&G's results of operations, cash flows or financial condition. Nuclear Insurance Under Price-Anderson, SCE&G (for itself and on behalf of Santee-Cooper) maintains agreements of indemnity with the NRC that, together with private insurance, cover third-party liability arising from any nuclear incident occurring at Unit 1. Price-Anderson provides funds up to $13.1 billion for public liability claims that could arise from a single nuclear incident. Each nuclear plant is insured against this liability to a maximum of $450 million by ANI with the remaining coverage provided by a mandatory program of deferred premiums that could be assessed, after a nuclear incident, against all owners of commercial nuclear reactors. Each reactor licensee is liable for up to $127.3 million per reactor owned for each nuclear incident occurring at any reactor in the United States, provided that not more than $18.9 million of the liability per reactor would be assessed per year. SCE&G’s maximum assessment, based on its two-thirds ownership of Unit 1, would be $84.8 million per incident, but not more than $12.6 million per year. Both the maximum assessment per reactor and the maximum yearly assessment are adjusted for inflation at least every five years. SCE&G currently maintains insurance policies (for itself and on behalf of Santee Cooper) with NEIL. The policies provide coverage to Unit 1 for property damage and outage costs up to $2.75 billion resulting from an event of nuclear origin and up to $2.33 billion resulting from an event of a non-nuclear origin. The NEIL policies in aggregate, are subject to a maximum loss of $2.75 billion for any single loss occurrence. The NEIL policies permit retrospective assessments under certain conditions to cover insurer’s losses. Based on the current annual premium, SCE&G’s portion of the retrospective premium assessment would not exceed $23.4 million. SCE&G currently maintains an excess property insurance policy (for itself and on behalf of Santee Cooper) with EMANI. The policy provides coverage to Unit 1 for property damage and outage costs up to $415 million resulting from an event of a non-nuclear origin. The EMANI policy permits retrospective assessments under certain conditions to cover insurer's losses. Based on the current annual premium, SCE&G's portion of the retrospective premium assessment would not exceed $2.0 million. To the extent that insurable claims for property damage, decontamination, repair and replacement and other costs and expenses arising from an incident at Unit 1 exceed the policy limits of insurance, or to the extent such insurance becomes unavailable in the future, and to the extent that SCE&G's rates would not recover the cost of any purchased replacement power, SCE&G will retain the risk of loss as a self-insurer. SCE&G has no reason to anticipate a serious nuclear or other incident. However, if such an incident were to occur, it likely would have a material impact on the Company’s and Consolidated SCE&G's results of operations, cash flows and financial position. Environmental On August 3, 2015, the EPA issued a revised standard for new power plants by re-proposing NSPS under the CAA for emissions of CO₂from newly constructed fossil fuel-fired units. The final rule required all new coal-fired power plants to meet a carbon emission rate of 1,400 pounds CO₂per MWh and new natural gas units to meet 1,000 pounds CO₂per MWh. While most new natural gas plants will not be required to include any new technologies, no new coal-fired plants could be constructed without partial carbon capture and sequestration capabilities. The Company and Consolidated SCE&G are monitoring the final rule, but do not plan to construct new coal-fired units in the foreseeable future. On August 3, 2015, the EPA issued its final rule on emission guidelines for states to follow in developing plans to address GHG emissions from existing units. The rule included state-specific goals for reducing national CO₂ emissions by 32% from 2005 levels by 2030, and established a phased-in compliance approach beginning in 2022. The rule gave each state from one to three years to issue its SIP, which would ultimately define the specific compliance methodology that would be applied to existing units in that state. On February 9, 2016, the Supreme Court stayed the rule pending disposition of a petition of review of the rule in the Court of Appeals. As a result of an Executive Order on March 28, 2017, the EPA placed the rule under review and the Court of Appeals agreed to hold the case in abeyance. On October 10, 2017, the Administrator of the EPA signed a notice proposing to repeal the rule on the grounds that it exceeded the EPA's statutory authority. In a separate but related action, the EPA issued an Advance Notice of Proposed Rulemaking on December 18, 2017, to solicit information from the public about a potential future rulemaking to limit greenhouse gas emissions from existing units. The Company and Consolidated SCE&G expect any costs incurred to comply with such rule to be recoverable through rates. In July 2011, the EPA issued the CSAPR to reduce emissions of SO₂and NO_X from power plants in the eastern half of the United States. The CSAPR replaces the CAIR and requires a total of 28 states to reduce annual SO₂ emissions and annual and ozone season NO_X emissions to assist in attaining the ozone and fine particle NAAQS. The rule establishes an emissions cap for SO₂and NO_X and limits the trading for emission allowances by separating affected states into two groups with no trading between the groups. The State of South Carolina has chosen to remain in the CSAPR program, even though recent court rulings exempted the state. This allows the state to remain compliant with regional haze standards. Air quality control installations that SCE&G and GENCO have already completed have positioned them to comply with the existing allowances set by the CSAPR. Any costs incurred to comply with CSAPR are expected to be recoverable through rates. In April 2012, the EPA's MATS rule containing new standards for mercury and other specified air pollutants became effective. The MATS rule has been the subject of ongoing litigation even while it remains in effect. Rulings on this litigation are not expected to have an impact on SCE&G or GENCO due to plant retirements, conversions, and enhancements. SCE&G and GENCO are in compliance with the MATS rule and expect to remain in compliance. The CWA provides for the imposition of effluent limitations that require treatment for wastewater discharges. Under the CWA, compliance with applicable limitations is achieved under state-issued NPDES permits such that, as a facility’s NPDES permit is renewed, any new effluent limitations would be incorporated. The ELG Rule had become effective on January 4, 2016, after which state regulators could modify facility NPDES permits to match more restrictive standards, which would require facilities to retrofit with new wastewater treatment technologies. Compliance dates varied by type of wastewater, and some were based on a facility's five-year permit cycle and thus could range from 2018 to 2023. However, the ELG Rule is under reconsideration by the EPA and has been stayed administratively. The EPA has decided to conduct a new rulemaking that could result in revisions to certain flue gas desulfurization wastewater and bottom ash transport water requirements in the ELG Rule. Accordingly, in September 2017 the EPA finalized a rule that resets compliance dates under the ELG Rule to a range from November 1, 2020 to December 31, 2023. The EPA indicates that the new rulemaking process may take up to three years to complete, such that any revisions to the ELG Rule likely would not be final until the summer of 2020. While the Company and Consolidated SCE&G expect that wastewater treatment technology retrofits will be required at Williams and Wateree Stations, any costs incurred to comply with the ELG Rule are expected to be recoverable through rates. The CWA Section 316(b) Existing Facilities Rule became effective in October 2014. This rule establishes national requirements for the location, design, construction and capacity of cooling water intake structures at existing facilities that reflect the best technology available for minimizing the adverse environmental impacts of impingement and entrainment. SCE&G and GENCO are conducting studies and implementing plans as required by the rule to determine appropriate intake structure modifications to ensure compliance with this rule. Any costs incurred to comply with this rule are expected to be recoverable through rates. The EPA's final rule for CCR became effective in the fourth quarter of 2015. This rule regulates CCR as a non-hazardous waste under Subtitle D of the Resource Conservation and Recovery Act and imposes certain requirements on ash storage ponds and other CCR management facilities at SCE&G's and GENCO's coal-fired generating facilities. SCE&G and GENCO have already closed or have begun the process of closure of all of their ash storage ponds and have previously recognized AROs for such ash storage ponds under existing requirements. The Company and Consolidated SCE&G do not expect the incremental compliance costs associated with this rule to be significant and expect to recover such costs in future rates. SCE&G is responsible for four decommissioned MGP sites in South Carolina which contain residues of by-product chemicals. These sites are in various stages of investigation, remediation and monitoring under work plans approved by or under review by DHEC and the EPA. SCE&G anticipates that major remediation activities at all these sites will continue at least through 2019 and will cost an additional $9.8 million, which is accrued in Other within Deferred Credits and Other Liabilities on the condensed consolidated balance sheet. SCE&G expects to recover any cost arising from the remediation of MGP sites through rates. At June 30, 2018, deferred amounts, net of amounts previously recovered through rates and insurance settlements, totaled $23.9 million and are included in regulatory assets. Other The Company and Consolidated SCE&G have recorded an estimated liability for amounts collected in customer rates during the period that arise from the impact of the Tax Act and from the impact of the legislatively-mandated refund related to rates previously approved under the BLRA. Such amounts have been recorded subject to refund, and are described in Note 2.
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Commitments and Contingencies Disclosure [Text Block]	COMMITMENTS AND CONTINGENCIES Abandoned Nuclear Project SCE&G, on behalf of itself and as agent for Santee Cooper, entered into the EPC Contract with the Consortium in 2008 for the design and construction of Unit 2 and Unit 3. Various difficulties were encountered which affected the ability of the Consortium to adhere to established budgets and construction schedules for the Nuclear Project and which, in light of Santee Cooper's decision to suspend construction of the Nuclear Project, led to the Company's decision on July 31, 2017 to stop the construction and seek recovery under the abandonment provisions of the BLRA. These difficulties and other developments occurring prior to the bankruptcy filing by WEC and WECTEC and other matters are described in Note 10 to the consolidated financial statements included in the Company's and Consolidated SCE&G's combined Form 10-K for the year ended December 31, 2017. Significant developments and continuing contingencies regarding the abandoned Nuclear Project subsequent to December 31, 2017 are discussed below. EPC Contract and BLRA Matters Contractor Bankruptcy Proceedings and Related Uncertainties On March 29, 2017, WEC and WECTEC, the two members of the Consortium, and certain of their affiliates filed petitions for protection under Chapter 11 of the U.S. Bankruptcy Code, citing a liquidity crisis arising from project contract losses attributable to the Nuclear Project and similar units being built for an unaffiliated company as a material factor that caused WEC and WECTEC to seek protection under the bankruptcy laws. As part of such filing, WEC and WECTEC publicly announced their inability to complete Unit 2 and Unit 3 under the terms of the EPC Contract. On September 1, 2017, SCE&G, for itself and as agent for Santee Cooper, filed with the Bankruptcy Court Proofs of Claim for unliquidated damages against each of WEC and WECTEC. These Proofs of Claim are based upon the anticipatory repudiation and material breach by the Consortium of the EPC Contract, and assert against WEC and WECTEC any and all claims that are based thereon or that may be related thereto. These claims were sold to Citibank on September 27, 2017 as part of a monetization transaction discussed below. Notwithstanding the sale of the claims, SCE&G and Santee Cooper remain responsible for any claims that may be made by WEC and WECTEC against them relating to the EPC Contract. WEC’s Reorganization Plan was confirmed by the Bankruptcy Court on March 28, 2018, and became effective August 1, 2018. In connection with the effectiveness of the Reorganization Plan, the EPC Contract was deemed rejected. Initially, WEC had projected that its Reorganization Plan would pay in full or nearly in full its pre-petition trade creditors, including several of the WEC Subcontractors which have alleged non-payment by the Consortium for amounts owed for work performed on the Nuclear Project and have filed liens on property in Fairfield County, South Carolina, where Unit 2 and Unit 3 were to be located (Unit 2/3 Property). SCE&G is contesting approximately $290 million of filed liens in Fairfield County. Most of these asserted liens are “pre-petition” claims that relate to work performed by WEC Subcontractors before the WEC bankruptcy, although some of them are “post-petition” claims arising from work performed after the WEC bankruptcy. WEC has now indicated that some unsecured creditors have sought or may seek amounts beyond what WEC allocated when it submitted the Reorganization Plan. If any unsecured creditor is successful in its attempt to include its claim as part of the class of general unsecured creditors beyond the amounts in the Reorganization Plan allocated by WEC, it is possible that the Reorganization Plan will not provide for payment in full or nearly in full to its pre-petition trade creditors. The shortfall could be significant. See also discussion below regarding limitations with respect to SCE&G’s pre-petition lien obligations arising from its monetization of the Toshiba Settlement. SCE&G and Santee Cooper are responsible for amounts owed to WEC for valid work performed by WEC Subcontractors on the Nuclear Project after the WEC bankruptcy filing (i.e., post-petition). While SCE&G and Santee Cooper funded amounts to WEC for such post-petition obligations on a weekly basis, SCE&G and Santee Cooper remain obligated to the extent amounts owed exceed (1) the amounts advanced to WEC for such purposes while the IAA was in effect or (2) the amounts held by WEC after the IAA was terminated. SCE&G intends to oppose any previously unasserted claim that is asserted against it, whether directly or indirectly by a claim through the IAA. Some WEC Subcontractors have made claims against SCE&G and Santee Cooper for damages the WEC Subcontractors claim arose after termination of the IAA. SCE&G intends to oppose these claims. To the extent any such claim is determined to be valid, SCE&G may be responsible for paying its 55% share thereof. Toshiba Settlement and Subsequent Monetization Payment and performance obligations under the EPC Contract are joint and several obligations of WEC and WECTEC. In 2015 Toshiba, WEC’s parent company, reaffirmed its guaranty of WEC’s payment obligations. In satisfaction of such guaranty obligations, on July 27, 2017, the Toshiba Settlement was executed under which Toshiba was to make periodic settlement payments beginning in October 2017 in the total amount of approximately $2.2 billion ($1.2 billion for SCE&G’s 55% share), subject to certain offsets for payments by WEC in bankruptcy that would have the effect of satisfying the liens discussed above and below. In September and October 2017, proceeds totaling approximately $1.997 billion were received in full satisfaction of the Toshiba Settlement ($1.098 billion for SCE&G's 55% share). The proceeds were obtained through the receipt of a payment from Toshiba and a payment from Citibank arising from its purchase of all other scheduled payments, including amounts related to the contractor liens discussed below. The purchase agreement with Citibank provides that SCE&G and Santee Cooper (each according to its pro rata share) would indemnify Citibank for its losses arising from misrepresentations or covenant defaults under the purchase agreement. SCE&G and Santee Cooper also assigned their claims under the WEC bankruptcy process to Citibank, and agreed to use commercially reasonable efforts to cooperate with Citibank and provide reasonable support necessary for its enforcement of those claims. The proceeds received under or arising from the monetization of the Toshiba Settlement are recorded as a regulatory liability on the accompanying condensed consolidated balance sheets, as the net value of the proceeds will be utilized to benefit SCE&G's customers in a manner to be determined by the SCPSC. As described above, several WEC Subcontractors have filed liens against the Unit 2/3 Property, which SCE&G is contesting. Payments under the Toshiba Settlement are subject to reduction if WEC pays WEC Subcontractors holding pre-petition liens directly. Under these circumstances, SCE&G and Santee Cooper, each in its pro rata share, would be required to make Citibank whole for the reduction. On January 2, 2018, the purchase agreement with Citibank was amended to limit the amount that SCE&G and Santee Cooper could be required to reimburse Citibank for valid subcontractor and vendor pre-petition liens to $60 million ($33 million for SCE&G's 55% share). Regulatory, Political and Legal Developments In September 2017, the Company was served with a subpoena issued by the United States Attorney’s Office for the District of South Carolina seeking documents relating to the Nuclear Project. The subpoena requires the Company to produce a broad range of documents related to the project. Also, SLED is conducting a criminal investigation into the handling of the Nuclear Project by SCANA and SCE&G. In October 2017, the staff of the SEC's Division of Enforcement also issued a subpoena for documents related to an investigation they are conducting related to the Nuclear Project. These investigations are ongoing, and the Company and Consolidated SCE&G intend to fully cooperate with them. Also in connection with the abandonment of the Nuclear Project, various state and local governmental authorities have attempted and may further attempt to challenge, reverse or revoke previously-approved tax or economic development incentives, benefits or exemptions and have attempted and may further attempt to apply such actions retroactively. No assurance can be given as to the timing or outcome of these matters. See Claims and Litigation for a description of specific challenges. On September 26, 2017, the South Carolina Office of Attorney General issued an opinion stating, among other things, that "as applied, portions of the BLRA are constitutionally suspect," including the abandonment provisions. Also on September 26, 2017, and in reliance on the opinion from the Office of Attorney General, the ORS filed the Request seeking an order from the SCPSC directing SCE&G to immediately suspend all revised rates collections from customers which were previously approved by the SCPSC pursuant to the authority of the BLRA. In the Request, the ORS noted the existence of an allegation that SCE&G failed to disclose information to the ORS, which the ORS believes should have been disclosed, that would have appeared to provide a basis for challenging prior requests, and asserted that SCE&G should not be allowed to continue to benefit from nondisclosure. The ORS also asked for an order that, if the BLRA is found to be unconstitutional or the South Carolina General Assembly amends or revokes the BLRA, then SCE&G should make credits to future bills or refunds to customers for prior revised rates collections. On October 17, 2017, the ORS filed a motion with the SCPSC to amend the Request, in which motion the ORS asked the SCPSC to consider the most prudent manner by which SCE&G will enable its customers to realize the value of the monetized Toshiba Settlement payments and other payments made by Toshiba towards satisfaction of its obligations to SCE&G. On December 20, 2017, the SCPSC denied a motion by SCE&G to dismiss the Request and the SCPSC requested that the ORS carry out an inspection, audit and examination of SCE&G's revenue requirements to assist the SCPSC in determining whether SCE&G's present schedule of rates is fair and reasonable. Parties who have intervened in the Request or who filed a letter in support of it include the state's Governor, Office of Attorney General and Speaker of the House of Representatives, the Electric Cooperatives of South Carolina, Santee Cooper, the SCEUC, certain large industrial customers, and several environmental groups. The SCPSC has scheduled a hearing on the Joint Petition and two other dockets related to the Nuclear Project, namely the Request by the ORS and a June 2017 complaint filed by the Friends of the Earth and the Sierra Club, to begin November 1, 2018. This schedule was established in response to legislation described below. SCE&G intends to continue vigorously contesting the Request, but cannot give any assurance as to the timing or outcome of this matter. See also Note 2. In 2017, special committees of the South Carolina General Assembly, both in the House of Representatives and in the Senate, conducted public hearings regarding the Company's decision to abandon the Nuclear Project. Several legislative proposals adverse to the Company and Consolidated SCE&G resulted from the work of these committees, two of which became law in 2018 and are described below. On June 27, 2018, the South Carolina General Assembly adopted Act 258, which became law June 28, 2018, to temporarily reduce the amount SCE&G can collect from customers under the BLRA. Act 258 requires the SCPSC to order a reduction in the portion of SCE&G's retail electric rates associated with the Nuclear Project from approximately 18% of the average residential electric customer’s bill to approximately 3.2%, or a reduction of approximately $31 million per month, retroactive to April 1, 2018. Absent an earlier ruling from the SCPSC, which could be issued only on the SCPSC’s own initiative, these lower rates are to be effective until the SCPSC renders a final decision on the merits of the Joint Petition. On July 2 and 3, 2018, the SCPSC issued orders implementing the temporary rate reduction required by Act 258. Unless the relief discussed in the next paragraph is granted, the new rates and retroactive credits required by Act 258 are to be put into effect with the first billing cycle of August 2018. Retroactive credits for billed and unbilled amounts for the period April 1, 2018 through June 30, 2018 total approximately $109.3 million, which amount has been deferred within Revenue subject to refund on the condensed consolidated balance sheet of the Company and Consolidated SCE&G. The initial recognition of such retroactive credits includes the effects of cycle billing on unbilled usage. In addition to the reduction of electric rates (which rates had been previously approved by the SCPSC), Act 258 alters various procedures previously applicable under the BLRA, including redefining the standard of care required by the BLRA and supplying definitions of key terms that would affect the evidence required to establish SCE&G’s ability to recover its costs associated with the Nuclear Project. On June 29, 2018, SCE&G filed a lawsuit in the District Court challenging the constitutionality of Act 258 along with joint resolution S. 954, which became law on July 2, 2018. Among other things, S. 954 prohibits the SCPSC from holding a hearing on the merits of the Joint Petition before November 1, 2018, and requires it to issue an order on the merits of the Joint Petition by December 21, 2018. In the lawsuit, which was subsequently amended, SCE&G seeks a declaration that the new laws are unconstitutional and asks the court to issue an injunction prohibiting the SCPSC from implementing Act 258. A hearing on SCE&G’s motion for the issuance of a preliminary injunction was held July 30-31, 2018. Dominion Energy and Sedona would not be obligated to complete the pending merger with SCANA if Act 258 remains in effect and is implemented. The Company and Consolidated SCE&G cannot predict the timing or outcome of this matter. Proposals to Resolve Outstanding Issues On November 16, 2017, SCE&G announced for public consideration a proposal to resolve outstanding issues relating to the Nuclear Project. Under the proposal, SCE&G electric customers were to receive a 3.5% electric rate reduction, the addition of an existing 540-MW natural gas fired power plant by SCE&G with the acquisition cost borne by SCANA shareholders, and the addition of approximately 100-MW of large scale solar energy by SCE&G. The proposal also provided for the recovery of the nuclear construction costs (net of the proceeds of the Toshiba Settlement not utilized for liquidation of project liens) over 50 years. While SCE&G’s proposal was not formally submitted for regulatory approval at that time, discussions with key stakeholders over the ensuing weeks indicated that SCE&G's proposal would not be sufficient to resolve the outstanding issues. On January 2, 2018, SCANA entered into the Merger Agreement with Dominion Energy, and on January 12, 2018, SCE&G and Dominion Energy filed the Joint Petition requesting SCPSC approval of the merger or a finding that either the merger is in the public interest or that there is an absence of harm arising from the merger. In this petition, the parties commit to providing an up-front, one time rate credit to SCE&G's electric customers totaling approximately $1.3 billion within 90 days of the merger's closing, providing at least a 5% reduction in customer bills (later adjusted to approximately 7% in light of the effects of the Tax Act), shortening the amortization period for costs related to the Nuclear Project to 20 years, forgoing recovery of approximately $1.7 billion in costs related to the Nuclear Project, and to SCE&G's purchasing an existing 540-MW natural gas fired power plant with no initial investment borne by customers. The SCPSC is scheduled to hold a hearing on the Joint Petition beginning on November 1, 2018, and as noted above, pursuant to S. 954 the SCPSC is required to issue an order related to the Joint Petition no later than December 21, 2018. No assurance can be given as to the timing or outcome of efforts to consummate the Merger Agreement or to obtain approval of the Joint Petition. On May 9, 2018, SCE&G completed its purchase of CEC, the existing 540-MW natural gas fired power plant referred to above, for approximately $180 million. As disclosed in Note 10 to the Company's and Consolidated SCE&G's Form 10-K for December 31, 2017, an impairment loss recorded in the fourth quarter of 2017 included $180 million related to SCE&G's commitment to not seek recovery from customers for the acquisition cost of this natural gas fired power plant, and accordingly, this amount was recorded as a reduction to unrecovered Nuclear Project costs within regulatory assets on the Company's and Consolidated SCE&G's consolidated balance sheets at December 31, 2017. As indicated above, the cost of the plant is being borne by SCANA shareholders. As such, the Company's and Consolidated SCE&G's condensed consolidated balance sheet as of June 30, 2018 reflect the cost for CEC within Utility Plant in Service, and the $180 million impairment initially recorded as unrecovered Nuclear Project costs within regulatory assets is now reflected within Accumulated Depreciation and Amortization, which results in the carrying value of CEC being entirely written off. SCE&G’s commitment to not seek recovery from customers for the acquisition cost of CEC was one element of certain broader rate mitigation proposals contained within the Joint Petition. Assuming that the SCPSC approves either of the mitigating proposals as outlined in the Joint Petition, SCE&G will not seek recovery of CEC acquisition costs. Impairment Considerations At June 30, 2018, SCE&G estimated that revised rates collections previously approved under the BLRA totaled approximately $445 million annually. SCE&G estimates that such revised rates collections for 2018 would be reduced by approximately $279 million if Act 258 remains in effect and is implemented through December 21, 2018, which is the expected pendency of the SCPSC proceeding with respect to the Joint Petition and related dockets. This reduction is comprised of the retroactive credits described above of approximately $109.3 million which are recorded as revenues subject to refund, with the remainder being related to revenues subject to refund that SCE&G expects to collect in July 2018 and lower revised rates during the period from the first billing cycle in August 2018 until the date new rates take effect. Such new rates would take effect after the SCPSC issues an order on the Joint Petition and other related matters pending before it, which order is to be issued no later than December 21, 2018. On a cumulative basis, at June 30, 2018, SCE&G estimated that revised rates collections previously approved under the BLRA totaled approximately $2.1 billion. Such estimates include the approximately $109.3 million of revenues subject to refund. On June 28, 2018, SCANA's Board of Directors declared a dividend of $0.1237 per share payable on July 18, 2018 to shareholders of record on July 10, 2018. This quarterly cash dividend reflects a reduction from the $0.6125 per share paid on SCANA’s common stock for the first quarter of 2018. The approximately eighty percent reduction in the dividend corresponds to the portion of the dividend attributable to SCE&G's electric operations and serves to partially mitigate the liquidity impacts arising from the reduced revenues resulting from the implementation of Act 258. Under the current regulatory construct in South Carolina, pursuant to the BLRA or through other means, the ability of SCE&G to recover costs incurred in connection with Unit 2 and Unit 3, and a reasonable return on them, will be subject to review and approval by the SCPSC. In light of the contentious nature of activity involving the General Assembly and other officials and the Request being considered by the SCPSC that could result in the suspension of all rates currently being collected under the BLRA, as well as the return of such amounts previously collected, there is significant uncertainty as to SCE&G’s ultimate ability to recover its costs of Unit 2 and Unit 3 and a return on them from its customers. SCE&G continues to contest the specific challenges described above. However, based on the consideration of those challenges, and particularly in light of SCE&G's proposed solution announced on November 16, 2017 and details in the Joint Petition filed by SCE&G and Dominion Energy with the SCPSC on January 12, 2018, the Company and Consolidated SCE&G determined that a disallowance of recovery of part of the cost of the abandoned Nuclear Project is both probable and reasonably estimable under applicable accounting guidance. In addition, the Company and Consolidated SCE&G determined that full recovery of certain other related costs deferred within regulatory assets is less than probable. As a result, in 2017 the Company and Consolidated SCE&G recognized a pre-tax impairment loss totaling $1.118 billion ($690 million net of tax). Also, in the first quarter of 2018, the Company and Consolidated SCE&G recognized an additional pre-tax impairment loss of approximately $3.6 million ($2.7 million net of tax) in order to further reduce to estimated fair value the carrying value of nuclear fuel which had been acquired for use in Unit 2 and Unit 3. It is reasonably possible that a change in estimated impairment loss could occur in the near term and could be material; however, all such changes cannot be reasonably estimated. The impairment loss recorded in 2017 reflects impacts similar to those that would have resulted had the proposed solution announced on November 16, 2017 been implemented. If the merger benefits and cost recovery plan outlined in the Joint Petition are implemented (upon closing of the merger as contemplated in the Merger Agreement), an additional impairment loss and other charges totaling as much as approximately $1.7 billion (approximately $1.3 billion net of tax) would be expected to be recorded. This additional impairment loss would result from the write-off of unrecovered Nuclear Project costs of approximately $842 million recorded within regulatory assets and the recording of additional liabilities for customer refunds totaling approximately $1.875 billion, net of approximately $1.065 billion, which amount represents the monetization of guaranty settlement recorded within regulatory liabilities less amounts that may be required to settle contractor liens. If (i) the SCPSC does not approve the Joint Petition and instead approves the Request by the ORS; (ii) the BLRA is found to be unconstitutional; or (iii) the General Assembly further amends or revokes the BLRA or approves other legislation with a similar effect, the Company and Consolidated SCE&G may be required to record an additional impairment loss and other charges totaling as much as approximately $4.9 billion (approximately $3.7 billion net of tax). This additional impairment loss would result from the write-off of approximately $3.962 billion in regulatory assets (comprised of remaining unrecovered Nuclear Project costs of $4.142 billion offset by $180 million in previously impaired costs related to CEC, which would result from the proposals put forward in the Joint Petition not being approved by the SCPSC) and the refund of revised rates collections under the BLRA described above of approximately $2.0 billion (comprised of the $2.1 billion revised rates collections on a cumulative basis as of June 30, 2018, offset by $109.3 million of such collections that have been recorded as revenue subject to refund), net of the monetization of guaranty settlement recorded within regulatory liabilities less amounts that may be required to settle contractor liens. While Act 258 requires the Company and Consolidated SCE&G to refund certain revenues collected from customers beginning April 1, 2018, the Company and Consolidated SCE&G do not currently anticipate that any amounts collected prior to April 1, 2018, will be subject to refund (other than amounts arising due to the effects of the Tax Act); however, no assurance can be given as to the outcome of this matter. At June 30, 2018, the Company and Consolidated SCE&G included considerations of the impact of Act 258 in the evaluation as to their ability to recover the remaining Nuclear Project costs and a reasonable return on those costs. Because Act 258 explicitly provides for an experimental rate that is temporary and does not disallow any of the costs currently deferred as a regulatory asset, and because the experimental rate is to be replaced by rates that the SCPSC is to determine and order no later than December 21, 2018, the Company and Consolidated SCE&G have concluded that the recording of additional impairment charges related to unrecovered Nuclear Project costs would not be appropriate at this time. However, if a disallowance were ordered or the rates under Act 258 were made other than temporary by the SCPSC in the Joint Petition proceeding, the Company and Consolidated SCE&G would reevaluate this conclusion. Were a disallowance ordered or were the rates under Act 258 made other than temporary following the SCPSC's final decision on the Joint Petition, and without consideration of any other factors that may be embodied in such an order, an additional pre-tax impairment charge totaling as much as approximately $1.7 billion may be required. Liquidity Considerations As a result of the legislative and regulatory reactions to the decision to stop construction of Unit 2 and Unit 3, downgrades by credit ratings agencies occurred. The Company and Consolidated SCE&G have significant obligations that must be paid within the next 12 months, including long-term debt maturities and capital lease payments of $568 million for the Company (including $564 million for Consolidated SCE&G), short-term borrowings of $517 million for the Company (including $457 million for Consolidated SCE&G), interest payments of approximately $318 million for the Company (including $238 million for Consolidated SCE&G), future minimum payments for operating leases of $11 million for the Company (including $3 million for Consolidated SCE&G), and revenues collected subject to refund arising from the effects of the Tax Act of approximately $55 million for the Company (including $46 million for Consolidated SCE&G). Working capital requirements, such as those for fuel supply and similar obligations, also arise due to the lag between when such amounts are paid and when related collection of such costs through customer rates occurs. In addition, as described above under Impairment Considerations, SCE&G has been ordered to reduce revised rates previously approved under the BLRA by approximately $279 million in 2018. This reduction assumes that Act 258 remains in effect and is implemented through December 21, 2018, which is the expected pendency of the SCPSC proceeding with respect to the Joint Petition and related dockets, and would include a refund of approximately $109.3 million previously recorded for the period April 1 through June 30, 2018. During the pendency of SCE&G's lawsuit filed June 29, 2018 in the District Court, as amended, SCE&G may be required to escrow funds or to secure a bond corresponding to the amount it may be required to refund if its lawsuit is unsuccessful. In addition, any adverse final judgment by a court in any matter of litigation, or any levy for amounts assessed by a regulatory agency, including but not limited to matters described in Claims and Litigation, could require the Company and/or Consolidated SCE&G to escrow funds or to post one or more bonds equal to the monetary amount of the judgment or assessment while the decision is being appealed or challenged. Management believes as of the date of issuance of these financial statements that it has access to available sources of cash to pay obligations when due over the next 12 months. These sources include committed, long-term lines of credit that expire in December 2020 totaling $1.8 billion for the Company (including $1.2 billion for Consolidated SCE&G). In addition, as of the date of issuance of these financial statements, SCE&G continues to collect the BLRA-related customer rates that remain after reductions ordered as a result of Act 258, as well as amounts provided for in other orders related to non-BLRA electric and gas rates. In 2018, however, certain of SCANA's credit ratings have fallen below investment grade, which has constrained its ability and that of Fuel Company to issue commercial paper. Regulatory and legislative proceedings described above, and/or proceedings described under Claims and Litigation below, which are outside of the Company’s and Consolidated SCE&G’s control, may result in the temporary or permanent suspension of all or a portion of the approximately $445 million annually of rates being collected currently under the BLRA, the return of such amounts collected through June 30, 2018, of $2.1 billion, or the requirement that SCE&G's share of payments received from the Toshiba Settlement ($1.098 billion) be placed in escrow or be refunded to customers in the near term. Neither the Company nor Consolidated SCE&G can predict if or when these matters may be resolved or what additional actions, if any, may be proposed or taken, including other legislative or regulatory actions related to the BLRA or other litigation. Were the SCPSC to grant the relief sought by the ORS in the Request or grant similar relief resulting from legislative action, and as further discussed above in Impairment Considerations, an additional impairment loss or other charges totaling as much as approximately $4.9 billion (approximately $3.7 billion net of tax) may be required. Such an impairment loss or other charges would further stress the Company’s and Consolidated SCE&G’s debt to total capitalization ratio and may result in the Company’s and Consolidated SCE&G’s ratio of debt to total capitalization exceeding maximum levels prescribed in their respective credit agreements. Such an event likely would limit the Company’s and Consolidated SCE&G’s ability to borrow under their commercial paper programs and credit facilities and their ability to pay future dividends or may trigger events of default under such agreements. Known and knowable conditions and events when considered in the aggregate as of the date of issuance of these financial statements do not suggest it is probable that the Company and Consolidated SCE&G will not be able to meet obligations as they come due over the next 12 months. However, possible future actions, including but not limited to actions related to the disallowance of all or part of the remaining unrecovered nuclear regulatory asset, rate reductions, refunds or lawsuits, could have a material adverse impact on the Company’s and Consolidated SCE&G’s financial condition, liquidity, results of operations and cash flows such that management’s conclusion with respect to its ability to pay obligations when due could change. Claims and Litigation Following the Company’s decision to stop construction of Unit 2 and Unit 3, purported derivative and class action lawsuits have been filed in multiple state circuit courts and federal district court on behalf of customers, shareholders and SCANA (in the case of the derivative shareholder actions), against SCANA, SCE&G, or both, and in certain cases some of their officers and/or directors. The plaintiffs allege various causes of action, including but not limited to waste, breach of fiduciary duty, negligence, unfair trade practices, unjust enrichment, conspiracy, fraud, constructive fraud, misrepresentation and negligent misrepresentation, promissory estoppel, constructive trust, and money had and received, among other causes of action. Plaintiffs generally seek compensatory and consequential damages and statutory treble damages and such further relief as the court deems just and proper. In addition, certain plaintiffs seek a declaration that SCE&G may not charge its customers to reimburse itself for past and continuing costs of the Nuclear Project. Certain plaintiffs also seek to freeze or appoint a receiver for certain of SCE&G’s assets, including all money SCE&G has received under the Toshiba payment guaranty and related settlement agreement and money to be collected from customers for the Nuclear Project. Purported class action lawsuits have been filed on behalf of investors in federal court against SCANA and certain of its current and former executive officers and directors. The plaintiffs allege, among other things, that defendants violated Section 10(b) of the Exchange Act and Rule 10b-5 promulgated thereunder and RICO. In addition, one plaintiff alleges that director defendants violated Section 14(a) of the Exchange Act and SEC Rule 14a-9 by allowing or causing misleading proxy statements to be issued. The plaintiffs in each of these suits seek compensatory and consequential damages and such further relief as the court deems proper. The plaintiffs also allege, among other things, that defendants violated their fiduciary duties to shareholders by executing a merger agreement that unfairly deprived plaintiffs of the true value of their SCANA stock, and that Dominion Energy and Sedona aided and abetted these actions. Among other remedies, the plaintiffs seek to enjoin the merger and rescind the Merger Agreement or to have the Merger Agreement amended to provide more favorable terms for plaintiffs, monetary damages, attorneys' fees and such further relief as the court deems proper. Lawsuits seeking class action status have also been filed on behalf of investors and shareholder derivative actions have been filed in the Court of Common Pleas in the Counties of Lexington and Richland, South Carolina, against SCANA, its CEO and directors, Dominion Energy and Sedona. Following removal of certain of these class action lawsuits and shareholder derivative actions from state courts to federal court and remand from the District Court back to state courts, in at least one instance such action was appealed to the United States Court of Appeals for the Fourth Circuit on July 26, 2018 by Dominion Energy. On July 13, 2018, SCANA’s Board of Directors elected two new, independent directors and exercised its right under South Carolina corporate law to form a Special Litigation Committee comprised solely of these newly elected members ("SLC") to investigate the claims asserted against current and former officers and directors of SCANA in derivative shareholder actions and related actions ("Derivative Litigation") and to determine SCANA’s best interests with respect to these actions. On July 24, 2018, SCANA, acting at the direction of the SLC, filed a motion to stay all federal court proceedings in the Derivative Litigation (In Re SCANA Corporation Derivative Litigation) to allow time for the SLC to conduct an independent investigation into the facts and circumstances giving rise to the Derivative Litigation, and to determine what course of action is in the best interests of SCANA and its shareholders with respect to the Derivative Litigation (e.g., prosecution of the claims in the name of SCANA, seeking dismissal of some or all of the claims, or taking other remedial actions). A complaint has been filed by Fairfield County against SCE&G making allegations of breach of contract, fraud, negligent misrepresentation, breach of fiduciary duty, breach of the implied duty of good faith and fair dealing, and unfair trade practices related to SCE&G’s termination of the FILOT agreement. Plaintiff seeks injunctive relief to prevent SCE&G from terminating the FILOT agreement; actual and consequential damages; treble damages; punitive damages; and attorneys’ fees. The Company has also been served with subpoenas issued by the United States Attorney’s Office for the District of South Carolina and the staff of the SEC's Division of Enforcement seeking documents relating to the Nuclear Project. Also, SLED is conducting a criminal investigation into the handling of the Nuclear Project by SCANA and SCE&G. These investigations are ongoing, and the Company and Consolidated SCE&G intend to fully cooperate with them. The DOR has initiated an audit of SCE&G's sales and use tax returns for the periods September 1, 2008 through December 31, 2017. The DOR's position is that the exemption for sales and use tax for purchases related to the Nuclear Project should not apply because Unit 2 and Unit 3 will not be placed into service and no electricity will be manufactured for sale. On June 1, 2018, SCE&G received from the DOR a notice of proposed assessment arising from that audit of approximately $410 million, plus interest. While SCE&G intends to protest the proposed assessment, it is reasonably possible that a loss estimated to be as much as $410 million, plus interest, could be incurred, of which SCE&G's proportionate share as a co-owner of the Nuclear Project would be 55%. On July 17, 2018, a case filed in the District Court styled Pennington et al. v. SCANA, Fluor Corporation and Fluor Enterprises was certified as a class action on behalf of persons who were formerly employed at the Nuclear Project. The plaintiffs allege, among other things, that the defendants violated the WARN Act in connection with the decision to stop construction at the Nuclear Project. The plaintiffs allege that the defendants failed to provide adequate advance written notice of their terminations of employment. While SCANA and SCE&G intend to contest this case, it is reasonably possible that a loss estimated to be as much as $75 million could be incurred, due to the likelihood the Fluor defendants would seek indemnification from them, of which SCE&G's proportionate share as a co-owner of the Nuclear Project would be 55%. While the Company and Consolidated SCE&G intend to vigorously contest the lawsuits, claims, and audit positions which have been filed or initiated against them, they cannot predict the timing or outcome of these matters or others that may arise, including any claims that may be asserted by or against Santee Cooper, and adverse outcomes from some of these matters would not be covered by insurance. Except as noted above, the various claims for damages do not specify an amount for those damages and the number of plaintiffs that are ultimately certified in any class action lawsuits is unknown. In addition, each of the cases referred to above is in its early stages. For these reasons, the Company and Consolidated SCE&G (i) have not determined that a loss is probable and (ii) except as noted above, cannot provide any estimate or range of potential loss for these matters at this time. Therefore, no accrual for these potential losses has been included in the condensed consolidated financial statements. However, outcomes could have a material adverse impact on the Company's and Consolidated SCE&G's results of operations, cash flows and financial condition. The Company and Consolidated SCE&G are subject to various other claims and litigation incidental to their business operations which management anticipates will be resolved without a material impact on the Company's and Consolidated SCE&G's results of operations, cash flows or financial condition. Nuclear Insurance Under Price-Anderson, SCE&G (for itself and on behalf of Santee-Cooper) maintains agreements of indemnity with the NRC that, together with private insurance, cover third-party liability arising from any nuclear incident occurring at Unit 1. Price-Anderson provides funds up to $13.1 billion for public liability claims that could arise from a single nuclear incident. Each nuclear plant is insured against this liability to a maximum of $450 million by ANI with the remaining coverage provided by a mandatory program of deferred premiums that could be assessed, after a nuclear incident, against all owners of commercial nuclear reactors. Each reactor licensee is liable for up to $127.3 million per reactor owned for each nuclear incident occurring at any reactor in the United States, provided that not more than $18.9 million of the liability per reactor would be assessed per year. SCE&G’s maximum assessment, based on its two-thirds ownership of Unit 1, would be $84.8 million per incident, but not more than $12.6 million per year. Both the maximum assessment per reactor and the maximum yearly assessment are adjusted for inflation at least every five years. SCE&G currently maintains insurance policies (for itself and on behalf of Santee Cooper) with NEIL. The policies provide coverage to Unit 1 for property damage and outage costs up to $2.75 billion resulting from an event of nuclear origin and up to $2.33 billion resulting from an event of a non-nuclear origin. The NEIL policies in aggregate, are subject to a maximum loss of $2.75 billion for any single loss occurrence. The NEIL policies permit retrospective assessments under certain conditions to cover insurer’s losses. Based on the current annual premium, SCE&G’s portion of the retrospective premium assessment would not exceed $23.4 million. SCE&G currently maintains an excess property insurance policy (for itself and on behalf of Santee Cooper) with EMANI. The policy provides coverage to Unit 1 for property damage and outage costs up to $415 million resulting from an event of a non-nuclear origin. The EMANI policy permits retrospective assessments under certain conditions to cover insurer's losses. Based on the current annual premium, SCE&G's portion of the retrospective premium assessment would not exceed $2.0 million. To the extent that insurable claims for property damage, decontamination, repair and replacement and other costs and expenses arising from an incident at Unit 1 exceed the policy limits of insurance, or to the extent such insurance becomes unavailable in the future, and to the extent that SCE&G's rates would not recover the cost of any purchased replacement power, SCE&G will retain the risk of loss as a self-insurer. SCE&G has no reason to anticipate a serious nuclear or other incident. However, if such an incident were to occur, it likely would have a material impact on the Company’s and Consolidated SCE&G's results of operations, cash flows and financial position. Environmental On August 3, 2015, the EPA issued a revised standard for new power plants by re-proposing NSPS under the CAA for emissions of CO₂from newly constructed fossil fuel-fired units. The final rule required all new coal-fired power plants to meet a carbon emission rate of 1,400 pounds CO₂per MWh and new natural gas units to meet 1,000 pounds CO₂per MWh. While most new natural gas plants will not be required to include any new technologies, no new coal-fired plants could be constructed without partial carbon capture and sequestration capabilities. The Company and Consolidated SCE&G are monitoring the final rule, but do not plan to construct new coal-fired units in the foreseeable future. On August 3, 2015, the EPA issued its final rule on emission guidelines for states to follow in developing plans to address GHG emissions from existing units. The rule included state-specific goals for reducing national CO₂ emissions by 32% from 2005 levels by 2030, and established a phased-in compliance approach beginning in 2022. The rule gave each state from one to three years to issue its SIP, which would ultimately define the specific compliance methodology that would be applied to existing units in that state. On February 9, 2016, the Supreme Court stayed the rule pending disposition of a petition of review of the rule in the Court of Appeals. As a result of an Executive Order on March 28, 2017, the EPA placed the rule under review and the Court of Appeals agreed to hold the case in abeyance. On October 10, 2017, the Administrator of the EPA signed a notice proposing to repeal the rule on the grounds that it exceeded the EPA's statutory authority. In a separate but related action, the EPA issued an Advance Notice of Proposed Rulemaking on December 18, 2017, to solicit information from the public about a potential future rulemaking to limit greenhouse gas emissions from existing units. The Company and Consolidated SCE&G expect any costs incurred to comply with such rule to be recoverable through rates. In July 2011, the EPA issued the CSAPR to reduce emissions of SO₂and NO_X from power plants in the eastern half of the United States. The CSAPR replaces the CAIR and requires a total of 28 states to reduce annual SO₂ emissions and annual and ozone season NO_X emissions to assist in attaining the ozone and fine particle NAAQS. The rule establishes an emissions cap for SO₂and NO_X and limits the trading for emission allowances by separating affected states into two groups with no trading between the groups. The State of South Carolina has chosen to remain in the CSAPR program, even though recent court rulings exempted the state. This allows the state to remain compliant with regional haze standards. Air quality control installations that SCE&G and GENCO have already completed have positioned them to comply with the existing allowances set by the CSAPR. Any costs incurred to comply with CSAPR are expected to be recoverable through rates. In April 2012, the EPA's MATS rule containing new standards for mercury and other specified air pollutants became effective. The MATS rule has been the subject of ongoing litigation even while it remains in effect. Rulings on this litigation are not expected to have an impact on SCE&G or GENCO due to plant retirements, conversions, and enhancements. SCE&G and GENCO are in compliance with the MATS rule and expect to remain in compliance. The CWA provides for the imposition of effluent limitations that require treatment for wastewater discharges. Under the CWA, compliance with applicable limitations is achieved under state-issued NPDES permits such that, as a facility’s NPDES permit is renewed, any new effluent limitations would be incorporated. The ELG Rule had become effective on January 4, 2016, after which state regulators could modify facility NPDES permits to match more restrictive standards, which would require facilities to retrofit with new wastewater treatment technologies. Compliance dates varied by type of wastewater, and some were based on a facility's five-year permit cycle and thus could range from 2018 to 2023. However, the ELG Rule is under reconsideration by the EPA and has been stayed administratively. The EPA has decided to conduct a new rulemaking that could result in revisions to certain flue gas desulfurization wastewater and bottom ash transport water requirements in the ELG Rule. Accordingly, in September 2017 the EPA finalized a rule that resets compliance dates under the ELG Rule to a range from November 1, 2020 to December 31, 2023. The EPA indicates that the new rulemaking process may take up to three years to complete, such that any revisions to the ELG Rule likely would not be final until the summer of 2020. While the Company and Consolidated SCE&G expect that wastewater treatment technology retrofits will be required at Williams and Wateree Stations, any costs incurred to comply with the ELG Rule are expected to be recoverable through rates. The CWA Section 316(b) Existing Facilities Rule became effective in October 2014. This rule establishes national requirements for the location, design, construction and capacity of cooling water intake structures at existing facilities that reflect the best technology available for minimizing the adverse environmental impacts of impingement and entrainment. SCE&G and GENCO are conducting studies and implementing plans as required by the rule to determine appropriate intake structure modifications to ensure compliance with this rule. Any costs incurred to comply with this rule are expected to be recoverable through rates. The EPA's final rule for CCR became effective in the fourth quarter of 2015. This rule regulates CCR as a non-hazardous waste under Subtitle D of the Resource Conservation and Recovery Act and imposes certain requirements on ash storage ponds and other CCR management facilities at SCE&G's and GENCO's coal-fired generating facilities. SCE&G and GENCO have already closed or have begun the process of closure of all of their ash storage ponds and have previously recognized AROs for such ash storage ponds under existing requirements. The Company and Consolidated SCE&G do not expect the incremental compliance costs associated with this rule to be significant and expect to recover such costs in future rates. SCE&G is responsible for four decommissioned MGP sites in South Carolina which contain residues of by-product chemicals. These sites are in various stages of investigation, remediation and monitoring under work plans approved by or under review by DHEC and the EPA. SCE&G anticipates that major remediation activities at all these sites will continue at least through 2019 and will cost an additional $9.8 million, which is accrued in Other within Deferred Credits and Other Liabilities on the condensed consolidated balance sheet. SCE&G expects to recover any cost arising from the remediation of MGP sites through rates. At June 30, 2018, deferred amounts, net of amounts previously recovered through rates and insurance settlements, totaled $23.9 million and are included in regulatory assets. Other The Company and Consolidated SCE&G have recorded an estimated liability for amounts collected in customer rates during the period that arise from the impact of the Tax Act and from the impact of the legislatively-mandated refund related to rates previously approved under the BLRA. Such amounts have been recorded subject to refund, and are described in Note 2.