Related Party Transactions (Details) - USD ($)	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Related Party Transaction [Line Items]
Dividends declared	$ 653,000,000	$ 602,000,000	$ 548,000,000
Dividends paid	620,000,000	592,000,000	531,000,000
DTE Electric
Related Party Transaction [Line Items]
Other services	(4,000,000)	(4,000,000)	(1,000,000)
Dividends declared	461,000,000	432,000,000	420,000,000
Dividends paid	461,000,000	432,000,000	420,000,000
DTE Electric \| Energy sales
Related Party Transaction [Line Items]
Revenues	9,000,000	9,000,000	10,000,000
DTE Electric \| Shared capital assets
Related Party Transaction [Line Items]
Revenues	43,000,000	39,000,000	33,000,000
DTE Electric \| Fuel and purchased power
Related Party Transaction [Line Items]
Costs	7,000,000	6,000,000	10,000,000
DTE Electric \| Other services and interest
Related Party Transaction [Line Items]
Costs	33,000,000	(2,000,000)	(1,000,000)
DTE Electric \| Corporate expenses, net
Related Party Transaction [Line Items]
Costs	377,000,000	370,000,000	370,000,000
DTE Electric \| DTE Energy
Related Party Transaction [Line Items]
Dividends declared	461,000,000	432,000,000	420,000,000
Dividends paid	461,000,000	432,000,000	420,000,000
Capital contribution from DTE Energy	325,000,000	100,000,000	120,000,000
DTE Electric \| DTE Energy Foundation
Related Party Transaction [Line Items]
Charitable contributions to foundation	$ 0	$ 7,000,000	$ 0

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- Definition

Charitable Contributions To Foundation

+ References

No definition available.

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- Definition

Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
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- Definition

Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
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- Definition

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
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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

Reflects the sum of all other revenue and income realized from sales and other transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party during the period.

+ References

No definition available.

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- Definition

Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 220
-Section S99
-Paragraph 1
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