Dispositions and Impairments (Details Textuals)		1 Months Ended	2 Months Ended	3 Months Ended	9 Months Ended
	Jul. 01, 2021 USD ($) shares	Jun. 30, 2021 USD ($)	Aug. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Long-term debt issued				$ 4,100,000,000	$ 4,100,000,000
Redemption of long-term debt			$ 2,600,000,000		3,242,000,000	$ 682,000,000
Net assets of DT Midstream				3,999,000,000
DTE Vantage
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment charge					27,000,000
DTE Vantage | Property, plant and equipment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment of long-lived assets held for use					18,000,000
DTE Vantage | Other noncurrent assets
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment of long-lived assets held for use					9,000,000
DT Midstream | Discontinued operations, spinoff
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total Assets of Discontinued Operations for DTE Energy				0	0		$ 8,076,000,000
Total Liabilities of Discontinued Operations for DTE Energy				0	$ 0		$ 935,000,000
Net assets of DT Midstream	$ 4,000,000,000
Maximum | DT Midstream | Discontinued operations, spinoff
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Transition Services Agreement period	24 months
Senior Notes
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Redemption of long-term debt				$ 2,600,000,000
DT Midstream
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Distribution of shares (in shares) | shares	96,732,466
Share distribution ratio	0.5
Discount and debt issuance costs		$ 53,000,000
Cash payment for dividend to DTE Energy		501,000,000
DT Midstream | June 2021 Variable Rate Term Loan maturing in 2028
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Long-term debt issued		1,000,000,000
DT Midstream | Senior Notes
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Long-term debt issued		2,100,000,000
DT Midstream | Affiliates
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash payment for short-term borrowings due to DTE Energy		2,537,000,000
Net cash payment for accounts receivable due from and accounts payable due to DTE Energy		$ 9,000,000