Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Schedule of Long-term Purchase Commitments

The Registrants estimate the following commitments from 2018 through 2051 for DTE Energy, and 2018 through 2033 for DTE Electric, as detailed in the following table:

	DTE Energy		DTE Electric
	(In millions)
2018	$	2,731	$	930
2019	1,045		320
2020	638		192
2021	474		149
2022	371		88
2023 and thereafter	2,277		820
	$	7,536	$	2,499