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Retirement Benefits and Trusteed Assets (Details Textuals) - USD ($) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Annual contributions per employee, percentage | 4.00% |  |
Defined contribution plan cost | $ 75,000,000 | $ 73,000,000 | $ 70,000,000
DTE Electric |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Defined contribution plan cost | $ 35,000,000 | 35,000,000 | 34,000,000
DTE Gas |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Annual contributions per employee, percentage | 8.00% |  |
Pension plan |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Estimated future employer contributions in next fiscal year | $ 0 |  |
Pension cost (credit) | $ (69,000,000) | 123,000,000 | 139,000,000
Expected return on plan assets for next fiscal year | 8.00% |  |
Pension plan | DTE Electric |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Pension funds transferred to (from) plan | $ 50,000,000 | 50,000,000 |
Pension cost (credit) | (39,000,000) | 101,000,000 | 107,000,000
Pension plan | DTE Gas |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Pension funds transferred to (from) plan | (50,000,000) | (50,000,000) |
Other postretirement benefit plan |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Pension cost (credit) | $ (38,000,000) | (66,000,000) | (59,000,000)
Expected return on plan assets for next fiscal year | 7.60% |  |
Retiree health care allowance will increase at lower of the rate of medical inflation or a set percentage | 2.00% |  |
Other postretirement benefit plan | DTE Electric |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Pension cost (credit) | $ (24,000,000) | $ (37,000,000) | $ (31,000,000)

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- Definition Amount of contribution expected to be received by defined benefit plan from employer in next fiscal year following current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-18 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 70 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480794/715-70-50-1 + Details
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