Consolidated Statements of Comprehensive Income (Unaudited) - DTE Energy Company (Parenthetical) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Tax effect on benefit obligations	$ 0
Tax effect on net unrealized losses on derivatives during the period	$ (1)	$ 8

Amount, after reclassification adjustment, of tax (expense) benefit for (increase) decrease in accumulated other comprehensive income of defined benefit plan.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 810
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Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
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