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Organization and Basis of Presentation | 12 Months Ended
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Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Organization and Basis of Presentation | ORGANIZATION AND BASIS OF PRESENTATION Corporate Structure DTE Energy owns the following businesses: •DTE Electric is a public utility engaged in the generation, purchase, distribution, and sale of electricity to approximately 2.3 million customers in southeastern Michigan; •DTE Gas is a public utility engaged in the purchase, storage, transportation, distribution, and sale of natural gas to approximately 1.3 million customers throughout Michigan and the sale of storage and transportation capacity; and •Other businesses include 1) DTE Vantage, which is primarily involved in renewable natural gas projects and providing custom energy solutions to industrial, commercial, and institutional customers, and 2) energy marketing and trading operations. DTE Electric and DTE Gas are regulated by the MPSC. Certain activities of DTE Electric and DTE Gas, as well as various other aspects of businesses under DTE Energy, are regulated by the FERC. In addition, the Registrants are regulated by other federal and state regulatory agencies including the NRC, the EPA, EGLE, and for DTE Energy, the CFTC and CARB. Basis of Presentation The accompanying Consolidated Financial Statements of the Registrants are prepared using accounting principles generally accepted in the United States of America. These accounting principles require management to use estimates and assumptions that impact reported amounts of assets, liabilities, revenues and expenses, and the disclosure of contingent assets and liabilities. Actual results may differ from the Registrants' estimates. The information in these combined notes relates to each of the Registrants as noted in the Index of Combined Notes to Consolidated Financial Statements. However, DTE Electric does not make any representation as to information related solely to DTE Energy or the subsidiaries of DTE Energy other than itself. Certain prior year balances for the Registrants were reclassified to match the current year's Consolidated Financial Statements presentation. Separation of DT Midstream On July 1, 2021, DTE Energy completed the separation of DT Midstream, its former natural gas pipeline, storage and gathering non-utility business. Financial results of DT Midstream in prior periods are presented as Income from discontinued operations, net of taxes on DTE Energy's Consolidated Statements of Operations. No adjustments were made to the historical activity within the Consolidated Statements of Comprehensive Income, Consolidated Statements of Cash Flows, or the Consolidated Statements of Changes in Equity. Unless noted otherwise, discussion in the Notes to the Consolidated Financial Statements relate to continuing operations. Refer to Note 4 to the Consolidated Financial Statements, “Discontinued Operations,” for additional information. Principles of Consolidation The Registrants consolidate all majority-owned subsidiaries and investments in entities in which they have controlling influence. Non-majority owned investments are accounted for using the equity method when the Registrants are able to significantly influence the operating policies of the investee. When the Registrants do not influence the operating policies of an investee, the equity investment is valued at cost minus any impairments, if applicable. These Consolidated Financial Statements also reflect the Registrants' proportionate interests in certain jointly-owned utility plants. The Registrants eliminate all intercompany balances and transactions. The Registrants evaluate whether an entity is a VIE whenever reconsideration events occur. The Registrants consolidate VIEs for which they are the primary beneficiary. If a Registrant is not the primary beneficiary and an ownership interest is held, the VIE is accounted for under the equity method of accounting. When assessing the determination of the primary beneficiary, a Registrant considers all relevant facts and circumstances, including: the power, through voting or similar rights, to direct the activities of the VIE that most significantly impact the VIE's economic performance and the obligation to absorb the expected losses and/or the right to receive the expected returns of the VIE. The Registrants perform ongoing reassessments of all VIEs to determine if the primary beneficiary status has changed. Legal entities within the DTE Vantage segment enter into long-term contractual arrangements with customers to supply energy-related products or services. The entities are generally designed to pass-through the commodity risk associated with these contracts to the customers, with DTE Energy retaining operational and customer default risk. These entities generally are VIEs and consolidated when DTE Energy is the primary beneficiary. In addition, DTE Energy has interests in certain VIEs through which control of all significant activities is shared with partners, and therefore are generally accounted for under the equity method. The Registrants hold ownership interests in certain limited partnerships. The limited partnerships include investment funds which support regional development and economic growth, and an operational business providing energy-related products. These entities are generally VIEs as a result of certain characteristics of the limited partnership voting rights. The ownership interests are accounted for under the equity method as the Registrants are not the primary beneficiaries. DTE Energy has variable interests in VIEs through certain of its long-term purchase and sale contracts. DTE Electric has variable interests in VIEs through certain of its long-term purchase contracts. As of December 31, 2022, the carrying amount of assets and liabilities in DTE Energy's Consolidated Statements of Financial Position that relate to its variable interests under long-term purchase and sale contracts are predominantly related to working capital accounts and generally represent the amounts owed by or to DTE Energy for the deliveries associated with the current billing cycle under the contracts. As of December 31, 2022, the carrying amount of assets and liabilities in DTE Electric's Consolidated Statements of Financial Position that relate to its variable interests under long-term purchase contracts are predominantly related to working capital accounts and generally represent the amounts owed by DTE Electric for the deliveries associated with the current billing cycle under the contracts. The Registrants have not provided any significant form of financial support associated with these long-term contracts. There is no material potential exposure to loss as a result of DTE Energy's variable interests through these long-term purchase and sale contracts. In addition, there is no material potential exposure to loss as a result of DTE Electric's variable interests through these long-term purchase contracts. In the first quarter 2022, DTE Electric financed regulatory assets for previously deferred costs related to the River Rouge generation plant and tree trimming surge program through the sale of bonds by a wholly-owned special purpose entity, DTE Securitization. DTE Securitization is a VIE. DTE Electric has the power to direct the most significant activities of DTE Securitization, including performing servicing activities such as billing and collecting surcharge revenue. Accordingly, DTE Electric is the primary beneficiary and DTE Securitization is consolidated by the Registrants. Securitization bond holders have no recourse to the Registrants' assets, except for those held by DTE Securitization. Surcharges collected by DTE Electric to pay for bond servicing and other qualified costs reflect securitization property solely owned by DTE Securitization. These surcharges are remitted to a trustee and are not available to other creditors of the Registrants. The maximum risk exposure for consolidated VIEs is reflected on the Registrants' Consolidated Statements of Financial Position. For non-consolidated VIEs, the maximum risk exposure of the Registrants is generally limited to their investment, notes receivable, and future funding commitments. The following table summarizes the major Consolidated Statements of Financial Position items for consolidated VIEs as of December 31, 2022 and 2021. All assets and liabilities of a consolidated VIE are presented where it has been determined that a consolidated VIE has either (1) assets that can be used only to settle obligations of the VIE or (2) liabilities for which creditors do not have recourse to the general credit of the primary beneficiary. VIEs, in which DTE Energy holds a majority voting interest and is the primary beneficiary, that meet the definition of a business and whose assets can be used for purposes other than the settlement of the VIE's obligations have been excluded from the table below. Amounts for the Registrants' consolidated VIEs are as follows:
| December 31,
| 2022 |  | 2021
| DTE Energy |  | DTE Electric(a) |  | DTE Energy
| (In millions)
ASSETS |  |  |  |  |
Cash and cash equivalents | $ | 14 |  |  | $ | — |  |  | $ | 11 |
Restricted cash | 9 |  |  | 9 |  |  | 6 |
Securitized regulatory assets | 206 |  |  | 206 |  |  | — |
Notes receivable | 81 |  |  | — |  |  | 70 |
Other current and long-term assets | 14 |  |  | 3 |  |  | 8 |
| $ | 324 |  |  | $ | 218 |  |  | $ | 95 |
LIABILITIES |  |  |  |  |
Short-term borrowings | $ | 81 |  |  | $ | — |  |  | $ | 75 |
Securitization bonds(b) | 211 |  |  | 211 |  |  | — |
Other current and long-term liabilities | 14 |  |  | 9 |  |  | 5 |
| $ | 306 |  |  | $ | 220 |  |  | $ | 80 |
_______________________________________ (a)DTE Electric amounts reflect DTE Securitization, which was a new VIE beginning the first quarter of 2022. See Note 9 to the Consolidated Financial Statements, "Regulatory Matters." (b)Includes $39 million reported in Current portion of long-term debt on the Registrants' Consolidated Statements of Financial Position for the period ended December 31, 2022. Amounts for DTE Energy's non-consolidated VIEs are as follows:
| December 31,
| 2022 |  | 2021
| (In millions)
Investments in equity method investees | $ | 137 |  |  | $ | 172 |
Notes receivable | $ | 15 |  |  | $ | 13 |
Future funding commitments | $ | 2 |  |  | $ | 3 |
Equity Method Investments Investments in non-consolidated affiliates that are not controlled by the Registrants, but over which they have significant influence, are accounted for using the equity method. Certain of the equity method investees are also considered VIEs and disclosed in the non-consolidated VIEs table above. At December 31, 2022 and 2021, DTE Energy's Investments in equity method investees were $165 million and $187 million, respectively. The balances are primarily comprised of investments in the DTE Vantage and Corporate and Other segments, of which no investment is individually significant. DTE Vantage investments include projects that deliver energy and utility-type products and services to industrial customers, sell electricity from renewable energy projects under long-term power purchase agreements, and produce and sell metallurgical coke. Corporate and Other holds various ownership interests in limited partnerships that include investment funds supporting regional development and economic growth. For further information by segment, see Note 22 to the Consolidated Financial Statements, "Segment and Related Information." At December 31, 2022 and 2021, DTE Energy's share of the underlying equity in the net assets of the investees exceeded the carrying amounts of Investments in equity method investees by $99 million for both periods. The difference is being amortized over the life of the underlying assets.

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