Regulatory Matters Regulatory Matters (Schedule of Regulatory Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Regulatory Liabilities [Line Items]
Regulatory liabilities	$ 589	$ 610
Less amount included in Current Liabilities	(34)	(41)
Regulatory liabilities	555	569
Removal costs liability
Regulatory Liabilities [Line Items]
Regulatory liabilities	266	291
Renewable energy
Regulatory Liabilities [Line Items]
Regulatory liabilities	145	197
Negative other postretirement offset
Regulatory Liabilities [Line Items]
Regulatory liabilities	56	0
Negative pension offset
Regulatory Liabilities [Line Items]
Regulatory liabilities	36	46
Fermi 2 refueling outage
Regulatory Liabilities [Line Items]
Regulatory liabilities	27	4
Refundable self-implemented rates
Regulatory Liabilities [Line Items]
Regulatory liabilities	27	0
Refundable income taxes
Regulatory Liabilities [Line Items]
Regulatory liabilities	11	23
Accrued PSCR/GCR refund
Regulatory Liabilities [Line Items]
Regulatory liabilities	7	37
Energy optimization
Regulatory Liabilities [Line Items]
Regulatory liabilities	4	10
Other
Regulatory Liabilities [Line Items]
Regulatory liabilities	10	2
DTE Electric
Regulatory Liabilities [Line Items]
Regulatory liabilities	256	218
Less amount included in Current Liabilities	(27)	(19)
Regulatory liabilities	229	199
DTE Electric | Removal costs liability
Regulatory Liabilities [Line Items]
Regulatory liabilities	0	0
DTE Electric | Renewable energy
Regulatory Liabilities [Line Items]
Regulatory liabilities	145	197
DTE Electric | Negative other postretirement offset
Regulatory Liabilities [Line Items]
Regulatory liabilities	55	0
DTE Electric | Negative pension offset
Regulatory Liabilities [Line Items]
Regulatory liabilities	0	0
DTE Electric | Fermi 2 refueling outage
Regulatory Liabilities [Line Items]
Regulatory liabilities	27	4
DTE Electric | Refundable self-implemented rates
Regulatory Liabilities [Line Items]
Regulatory liabilities	27	0
DTE Electric | Refundable income taxes
Regulatory Liabilities [Line Items]
Regulatory liabilities	0	0
DTE Electric | Accrued PSCR/GCR refund
Regulatory Liabilities [Line Items]
Regulatory liabilities	0	15
DTE Electric | Energy optimization
Regulatory Liabilities [Line Items]
Regulatory liabilities	0	0
DTE Electric | Other
Regulatory Liabilities [Line Items]
Regulatory liabilities	$ 2	$ 2