Long-Term Debt (Debt Issuances) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Nov. 30, 2024	Oct. 31, 2024	Aug. 31, 2024	May 31, 2024	Feb. 29, 2024
Debt Instrument [Line Items]
Amount	$ 4,570
Senior Notes | February 2024 5.10% Senior Notes Maturing In 2029
Debt Instrument [Line Items]
Interest Rate						5.10%
Amount						$ 1,200
Senior Notes | May 2024 5.85% Senior Notes Maturing In 2034
Debt Instrument [Line Items]
Interest Rate					5.85%
Amount					$ 850
Senior Notes | August 2024 4.95% Senior Notes Maturing in 2027
Debt Instrument [Line Items]
Interest Rate				4.95%
Amount				$ 1,200
Senior Notes | Series C 2.53% Senior Notes Due October 1, 2024
Debt Instrument [Line Items]
Interest Rate	2.53%
Amount	$ 675
Senior Notes | Series F 4.22% Senior Notes Due November 1, 2024
Debt Instrument [Line Items]
Interest Rate	4.22%	4.22%
Amount	$ 1,300
DTE Electric | Mortgage Bonds | February 2024 4.85% Mortgage Bonds Maturing In 2026
Debt Instrument [Line Items]
Interest Rate						4.85%
Amount						$ 500
DTE Electric | Mortgage Bonds | February 2024 5.20% Mortgage Bonds Maturing In 2034
Debt Instrument [Line Items]
Interest Rate						5.20%
Amount						$ 500
DTE Gas | Mortgage Bonds | October 2024 4.87% First Mortgage Bonds Maturing In 2034
Debt Instrument [Line Items]
Interest Rate			4.87%
Amount			$ 160
DTE Gas | Mortgage Bonds | October 2024 5.43% First Mortgage Bonds Maturing In 2054
Debt Instrument [Line Items]
Interest Rate			5.43%
Amount			$ 160