Acquisitions (Details Textuals) $ in Millions				1 Months Ended		3 Months Ended
	Feb. 18, 2020 USD ($) MW	Dec. 04, 2019 USD ($)	Sep. 12, 2019 USD ($) MW	Jan. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)
Business Acquisition [Line Items]
Consideration paid for entity acquired, paid in cash						$ 128	$ 0
Liability for contingent consideration payment and related accretion expense					$ 379	382
Goodwill					2,464	2,466
Operating Revenues — Non-utility operations						1,289	1,650
Net Income						342	$ 408
Power and Industrial Projects | South Jersey Industries, Combined Heat and Power Generation Facility
Business Acquisition [Line Items]
Amount of power associated with purchase of renewable energy project | MW	8
Consideration paid for entity acquired, paid in cash	$ 97
Power and Industrial Projects | South Jersey Industries, Combined Heat and Power Generation Facility | Contract intangibles
Business Acquisition [Line Items]
Intangible assets, amortization period	13 years
Intangible assets recorded as a result of acquisition	$ 18
Electric | Heritage Sustainable Energy, Renewable Energy Project | DTE Sustainable Generation
Business Acquisition [Line Items]
Amount of power associated with purchase of renewable energy project | MW			89
Total consideration provided for acquired entity			$ 175
Electric | Heritage Sustainable Energy, Renewable Energy Project | DTE Sustainable Generation | Contract intangibles
Business Acquisition [Line Items]
Intangible assets recorded as a result of acquisition			$ 109
Electric | Heritage Sustainable Energy, Renewable Energy Project | DTE Sustainable Generation | Contract intangibles | Minimum
Business Acquisition [Line Items]
Intangible assets, amortization period			11 years
Electric | Heritage Sustainable Energy, Renewable Energy Project | DTE Sustainable Generation | Contract intangibles | Maximum
Business Acquisition [Line Items]
Intangible assets, amortization period			13 years
Electric | Heritage Sustainable Energy, Additional Renewable Energy Project | DTE Sustainable Generation
Business Acquisition [Line Items]
Consideration paid for entity acquired, paid in cash				$ 33
Gas Storage and Pipelines | Blue Union and LEAP
Business Acquisition [Line Items]
Consideration paid for entity acquired, paid in cash		$ 2,360
Total consideration provided for acquired entity		$ 2,740
Percent of assets acquired		100.00%
Contingent consideration to be paid upon completion		$ 380
Contingent payment, low end of range		0
Contingent payment, high end of range		385
Liability for contingent consideration payment and related accretion expense						2
Cash consideration paid and held in escrow		100
Goodwill		$ 173				173
Goodwill, working capital adjustments						$ 2
Direct transaction costs incurred					18
Issuance costs related to acquisition financing					49
Operating Revenues — Non-utility operations					15
Net Income					3
Gas Storage and Pipelines | Blue Union and LEAP | Mortgage bonds, notes, and other
Business Acquisition [Line Items]
Issuance costs related to acquisition financing					10
Gas Storage and Pipelines | Blue Union and LEAP | Common Stock
Business Acquisition [Line Items]
Issuance costs related to acquisition financing					$ 39
Gas Storage and Pipelines | Blue Union and LEAP | 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