Acquisitions and Dispositions (Details Textuals) $ in Millions					1 Months Ended		12 Months Ended
	Jul. 27, 2020 USD ($) installment	Feb. 18, 2020 USD ($) MW	Dec. 04, 2019 USD ($)	Sep. 12, 2019 USD ($) MW	Jan. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Business Acquisition [Line Items]
Operating Revenues — Non-utility operations							$ 5,332	$ 6,031	$ 7,542
Net Income							$ 1,371	1,172	$ 1,118
Contract intangibles | Minimum
Business Acquisition [Line Items]
Intangible assets, amortization period							6 years
Contract intangibles | Maximum
Business Acquisition [Line Items]
Intangible assets, amortization period							26 years
Customer relationships | Minimum
Business Acquisition [Line Items]
Intangible assets, amortization period							25 years
Customer relationships | Maximum
Business Acquisition [Line Items]
Intangible assets, amortization period							40 years
South Jersey Industries, Combined Heat and Power Generation Facility | Power and Industrial Projects
Business Acquisition [Line Items]
Amount of power associated with purchase of renewable energy project | MW		8
Consideration paid for entity acquired, paid in cash		$ 95
South Jersey Industries, Combined Heat and Power Generation Facility | Power and Industrial Projects | Contract intangibles
Business Acquisition [Line Items]
Intangible assets, amortization period		13 years
Intangible assets recorded as a result of acquisition		$ 17
Heritage Sustainable Energy, Renewable Energy Project | Electric | DTE Sustainable Generation
Business Acquisition [Line Items]
Amount of power associated with purchase of renewable energy project | MW				89
Consideration paid for entity acquired, paid in cash				$ 175
Heritage Sustainable Energy, Renewable Energy Project | Electric | DTE Sustainable Generation | Contract intangibles
Business Acquisition [Line Items]
Intangible assets recorded as a result of acquisition				$ 109
Heritage Sustainable Energy, Renewable Energy Project | Electric | DTE Sustainable Generation | Contract intangibles | Minimum
Business Acquisition [Line Items]
Intangible assets, amortization period				11 years
Heritage Sustainable Energy, Renewable Energy Project | Electric | DTE Sustainable Generation | Contract intangibles | Maximum
Business Acquisition [Line Items]
Intangible assets, amortization period				13 years
Heritage Sustainable Energy, Additional Renewable Energy Project | Electric | DTE Sustainable Generation
Business Acquisition [Line Items]
Consideration paid for entity acquired, paid in cash					$ 33
Blue Union and LEAP | Gas Storage and Pipelines
Business Acquisition [Line Items]
Consideration paid for entity acquired, paid in cash			$ 2,360
Percent of assets acquired			100.00%
Total consideration provided for acquired entity			$ 2,740
Contingent consideration to be paid upon completion			$ 380
Accretion expense related to liability for contingent consideration payment						$ 1	$ 5
Payment of consideration upon achievement of final milestone	$ 385
Number of equal payment installments made upon achievement of final milestone | installment	2
Goodwill, working capital adjustments							$ 2
Direct transaction costs incurred						18		18
Issuance costs related to acquisition financing						49		49
Operating Revenues — Non-utility operations						15
Net Income						3
Blue Union and LEAP | Gas Storage and Pipelines | Mortgage bonds, notes, and other
Business Acquisition [Line Items]
Issuance costs related to acquisition financing						10		10
Blue Union and LEAP | Gas Storage and Pipelines | Common Stock
Business Acquisition [Line Items]
Issuance costs related to acquisition financing						$ 39		$ 39
Blue Union and LEAP | Gas Storage and Pipelines | Customer relationships
Business Acquisition [Line Items]
Intangible assets, amortization period			40 years
Intangible assets recorded as a result of acquisition			$ 1,473
Existing intangible asset weighted-average amortization life			13 years