Retirement Benefits and Trusteed Assets (OPEB - Benefits related to Qualified and Nonqualified Pension Plans Expected to be paid in the Next Ten Years) (Details) - Other postretirement benefit plan $ in Millions	Dec. 31, 2022 USD ($)
Defined Benefit Plan Disclosure [Line Items]
2023	$ 84
2024	89
2025	90
2026	91
2027	94
2028-2032	488
Total	936
DTE Electric
Defined Benefit Plan Disclosure [Line Items]
2023	64
2024	67
2025	68
2026	69
2027	71
2028-2032	371
Total	$ 710