Regulatory Matters (Schedule of Regulatory Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Regulatory Assets [Line Items]
Regulatory assets	$ 3,913	$ 3,724
Less amount included in Current Assets	(42)	(32)
Regulatory assets, noncurrent	3,871	3,692
Pension
Regulatory Assets [Line Items]
Regulatory assets	2,159	2,112
Other postretirement costs
Regulatory Assets [Line Items]
Regulatory assets	286	256
Asset retirement obligation
Regulatory Assets [Line Items]
Regulatory assets	613	565
Recoverable Michigan income taxes
Regulatory Assets [Line Items]
Regulatory assets	231	248
Removal costs asset
Regulatory Assets [Line Items]
Regulatory assets	193	118
Deferred environmental costs
Regulatory Assets [Line Items]
Regulatory assets	78	54
Recoverable income taxes related to AFUDC equity
Regulatory Assets [Line Items]
Regulatory assets	59	49
Unamortized loss on reacquired debt
Regulatory Assets [Line Items]
Regulatory assets	59	63
Other recoverable income taxes
Regulatory Assets [Line Items]
Regulatory assets	57	61
Customer360 deferred costs
Regulatory Assets [Line Items]
Regulatory assets	33	16
Transitional Reconciliation Mechanism
Regulatory Assets [Line Items]
Regulatory assets	30	43
Accrued PSCR/GCR revenue
Regulatory Assets [Line Items]
Regulatory assets	22	12
Cost to achieve Performance Excellence Process
Regulatory Assets [Line Items]
Regulatory assets	12	33
Other
Regulatory Assets [Line Items]
Regulatory assets	81	94
DTE Electric
Regulatory Assets [Line Items]
Regulatory assets	3,149	2,986
Less amount included in Current Assets	(36)	(17)
Regulatory assets, noncurrent	3,113	2,969
DTE Electric | Pension
Regulatory Assets [Line Items]
Regulatory assets	1,642	1,592
DTE Electric | Other postretirement costs
Regulatory Assets [Line Items]
Regulatory assets	207	198
DTE Electric | Asset retirement obligation
Regulatory Assets [Line Items]
Regulatory assets	613	565
DTE Electric | Recoverable Michigan income taxes
Regulatory Assets [Line Items]
Regulatory assets	187	203
DTE Electric | Removal costs asset
Regulatory Assets [Line Items]
Regulatory assets	193	118
DTE Electric | Deferred environmental costs
Regulatory Assets [Line Items]
Regulatory assets	0	0
DTE Electric | Recoverable income taxes related to AFUDC equity
Regulatory Assets [Line Items]
Regulatory assets	53	44
DTE Electric | Unamortized loss on reacquired debt
Regulatory Assets [Line Items]
Regulatory assets	39	41
DTE Electric | Other recoverable income taxes
Regulatory Assets [Line Items]
Regulatory assets	57	61
DTE Electric | Customer360 deferred costs
Regulatory Assets [Line Items]
Regulatory assets	33	16
DTE Electric | Transitional Reconciliation Mechanism
Regulatory Assets [Line Items]
Regulatory assets	30	43
DTE Electric | Accrued PSCR/GCR revenue
Regulatory Assets [Line Items]
Regulatory assets	19	0
DTE Electric | Cost to achieve Performance Excellence Process
Regulatory Assets [Line Items]
Regulatory assets	10	28
DTE Electric | Other
Regulatory Assets [Line Items]
Regulatory assets	$ 66	$ 77