Defined Benefit Plan, Plan Assets, Additional Contributions by Employer

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- Definition

Defined benefit plan, expected return on plan assets next fiscal year

+ References

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- Definition

Retiree Health Care Allowance will increase at lower of the rate of medical inflation or a set percentage

+ References

No definition available.

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- Definition

Amount of contribution received by defined benefit plan from employer which increases plan assets.

+ References

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- Definition

Amount of decrease in accumulated postretirement benefit obligation from one-percentage-point decrease in assumed health care cost trend rate.

+ References

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- Definition

Amount of decrease in service and interest cost components of net periodic postretirement benefit cost from one-percentage-point decrease in assumed health care cost trend rate.

+ References

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- Definition

Amount of increase in accumulated postretirement benefit obligation from one-percentage-point increase in assumed health care cost trend rate.

+ References

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- Definition

Amount of increase in service and interest cost components of net periodic postretirement benefit cost from one-percentage-point increase in assumed health care cost trend rate.

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- Definition

Amount of contributions expected to be received by defined benefit plan from employer in next fiscal year following latest fiscal year.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of cost for defined contribution plan.

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- Definition

Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

+ References

No definition available.

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- Definition

Amount of cost (reversal of cost) for pension benefits. Excludes other postretirement benefits.

+ References

No definition available.

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Retirement Benefits and Trusteed Assets (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan, cost recognized		$ 65	$ 61	$ 57
Annual contributions per employee, percentage		4.00%
DTE Electric
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan, cost recognized		$ 31	29	27
DTE Gas
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Annual contributions per employee, percentage		8.00%
Pension plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Cash contributions to qualified pension plans		$ 168	185
Expected return on plan assets for next fiscal year		7.10%
Pension plan \| Qualified Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Additional cash contributions to qualified pension plans		$ 50
Cash contributions to qualified pension plans		150	175	223
Pension plan \| DTE Electric
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Allocated pension benefit costs		93	120	136
Pension plan \| DTE Electric \| Qualified Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Allocated pension benefit costs	$ 100
Cash contributions to qualified pension plans		100	175	185
Pension plan \| Maximum \| Qualified Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Estimated future employer contributions in next fiscal year		185
Pension plan \| Maximum \| DTE Electric \| Qualified Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Estimated future employer contributions in next fiscal year		$ 160
Other postretirement benefit plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected return on plan assets for next fiscal year		7.20%
Retiree health care allowance will increase at lower of the rate of medical inflation or a set percentage		2.00%
Defined benefit plan, effect of one percentage point increase on service and interest cost components		$ 3
Defined benefit plan, effect of one percentage point increase on accumulated postretirement benefit obligation		62
Defined benefit plan, effect of one percentage point decrease on service and interest cost components		3
Defined benefit plan, effect of one percentage point decrease on accumulated postretirement benefit obligation		54
Other postretirement benefit plan \| DTE Electric
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, effect of one percentage point increase on service and interest cost components		2
Defined benefit plan, effect of one percentage point increase on accumulated postretirement benefit obligation		44
Defined benefit plan, effect of one percentage point decrease on service and interest cost components		2
Defined benefit plan, effect of one percentage point decrease on accumulated postretirement benefit obligation		39
Retiree healthcare plan (VEBA)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan, cost recognized		13	11	8
Retiree healthcare plan (VEBA) \| DTE Electric
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan, cost recognized		$ 6	$ 5	$ 5