Regulatory Matters (Schedule of Regulatory Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Regulatory Liabilities [Line Items]
Regulatory liabilities	$ 3,262	$ 3,402
Less amount included in Current Liabilities	(156)	(39)
Regulatory liabilities, noncurrent	3,106	3,363
Refundable federal income taxes
Regulatory Liabilities [Line Items]
Regulatory liabilities	2,117	2,255
Removal costs liability
Regulatory Liabilities [Line Items]
Regulatory liabilities	679	831
Negative other postretirement offset
Regulatory Liabilities [Line Items]
Regulatory liabilities	150	122
Non-service pension and other postretirement costs
Regulatory Liabilities [Line Items]
Regulatory liabilities	110	78
Incremental tree trim surge
Regulatory Liabilities [Line Items]
Regulatory liabilities	90	0
COVID-19 voluntary refund
Regulatory Liabilities [Line Items]
Regulatory liabilities	30	30
Energy Waste Reduction
Regulatory Liabilities [Line Items]
Regulatory liabilities	27	15
Renewable energy
Regulatory Liabilities [Line Items]
Regulatory liabilities	13	21
Other
Regulatory Liabilities [Line Items]
Regulatory liabilities	46	50
DTE Electric
Regulatory Liabilities [Line Items]
Regulatory liabilities	2,375	2,450
Less amount included in Current Liabilities	(154)	(18)
Regulatory liabilities, noncurrent	2,221	2,432
DTE Electric | Refundable federal income taxes
Regulatory Liabilities [Line Items]
Regulatory liabilities	1,729	1,827
DTE Electric | Removal costs liability
Regulatory Liabilities [Line Items]
Regulatory liabilities	283	410
DTE Electric | Negative other postretirement offset
Regulatory Liabilities [Line Items]
Regulatory liabilities	106	86
DTE Electric | Non-service pension and other postretirement costs
Regulatory Liabilities [Line Items]
Regulatory liabilities	54	36
DTE Electric | Incremental tree trim surge
Regulatory Liabilities [Line Items]
Regulatory liabilities	90	0
DTE Electric | COVID-19 voluntary refund
Regulatory Liabilities [Line Items]
Regulatory liabilities	30	30
DTE Electric | Energy Waste Reduction
Regulatory Liabilities [Line Items]
Regulatory liabilities	27	15
DTE Electric | Renewable energy
Regulatory Liabilities [Line Items]
Regulatory liabilities	13	21
DTE Electric | Other
Regulatory Liabilities [Line Items]
Regulatory liabilities	$ 43	$ 25