Related Party Transactions (DTE Electric Transactions with Affiliated Companies) (Details) - USD ($)	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Related Party Transaction [Line Items]
Dividends declared	$ 752,000,000	$ 796,000,000	$ 714,000,000
Dividends paid	791,000,000	760,000,000	692,000,000
DTE Electric
Related Party Transaction [Line Items]
Dividends declared	588,000,000	539,000,000	494,000,000
Dividends paid	588,000,000	539,000,000	494,000,000
DTE Electric \| Energy sales
Related Party Transaction [Line Items]
Revenues and Other Income	9,000,000	8,000,000	10,000,000
DTE Electric \| Other services and interest
Related Party Transaction [Line Items]
Other services and interest	2,000,000	2,000,000	5,000,000
Costs	0	1,000,000	24,000,000
DTE Electric \| Shared capital assets
Related Party Transaction [Line Items]
Revenues and Other Income	49,000,000	47,000,000	42,000,000
DTE Electric \| Fuel and purchased power
Related Party Transaction [Line Items]
Costs	13,000,000	16,000,000	6,000,000
DTE Electric \| Corporate expenses
Related Party Transaction [Line Items]
Costs	391,000,000	367,000,000	372,000,000
DTE Electric \| DTE Energy
Related Party Transaction [Line Items]
Dividends declared	588,000,000	539,000,000	494,000,000
Dividends paid	588,000,000	539,000,000	494,000,000
Capital contribution from DTE Energy	555,000,000	636,000,000	180,000,000
DTE Electric \| DTE Energy Foundation
Related Party Transaction [Line Items]
Charitable contributions to foundation	$ 2,000,000	$ 20,000,000	$ 0

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

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