Consolidated Statements of Financial Position - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Current Assets
Cash and cash equivalents	$ 37	$ 48
Restricted cash	23	120
Accounts receivable (less allowance for doubtful accounts of $49 and $54, respectively DTE Electric $28 and $29, respectively)
Customer	1,276	1,504
Other	72	94
Inventories
Fuel and gas	480	512
Materials and supplies	323	292
Derivative assets	129	128
Notes receivable
Regulatory assets	32	76
Other	203	238
Total Current Assets	2,575	3,012
Investments
Nuclear decommissioning trust funds	1,236	1,241
Investments in equity method investees	514	434
Other	186	194
Total Investments	1,936	1,869
Property
Property, plant, and equipment	28,121	26,538
Less accumulated depreciation and amortization	(10,087)	(9,718)
Property, plant and equipment, net	18,034	16,820
Other Assets
Goodwill	2,018	2,018
Regulatory assets	3,692	3,651
Securitized regulatory assets	0	34
Intangible assets	89	102
Notes receivable	85	90
Derivative assets	54	44
Other	254	259
Total Noncurrent Assets	6,192	6,198
Total Assets	28,737	27,899
Current Liabilities
Accounts payable	809	973
Accrued interest	89	86
Dividends payable	131	122
Short-term borrowings	499	398
Current portion long-term debt, including capital leases	473	274
Derivative liabilities	57	77
Regulatory liabilities	41	153
Other	429	494
Total Current Liabilities	2,528	2,577
Long-Term Debt (net of current portion)
Mortgage bonds, notes, and other	8,340	7,860
Junior subordinated debentures	480	480
Capital lease obligations	15	3
Total Long-Term Debt (net of current portion)	8,835	8,343
Other Liabilities
Deferred income taxes	3,923	3,701
Regulatory liabilities	569	667
Asset retirement obligations	2,194	1,962
Unamortized investment tax credit	62	41
Derivative liabilities	86	8
Accrued pension liability	1,133	1,280
Accrued postretirement liability	228	515
Nuclear decommissioning	177	182
Other	207	281
Total Noncurrent Liabilities	$ 8,579	$ 8,637
Commitments and Contingencies (Notes 8 and 17)
Equity
Common stock, without par value, 400,000,000 shares authorized, and 179,470,213 and 176,991,231 shares issued and outstanding, respectively	$ 4,123	$ 3,904
Retained earnings	4,794	4,578
Accumulated other comprehensive loss	(145)	(155)
Total DTE Energy Company Equity	8,772	8,327
Noncontrolling interests	23	15
Total Equity	8,795	8,342
Total Liabilities and Equity	28,737	27,899
DTE Electric
Current Assets
Cash and cash equivalents	15	14
Restricted cash	0	96
Accounts receivable (less allowance for doubtful accounts of $49 and $54, respectively DTE Electric $28 and $29, respectively)
Customer	657	688
Affiliates	14	31
Other	40	15
Inventories
Fuel and gas	271	269
Materials and supplies	251	231
Notes receivable
Affiliates	0	8
Other	0	8
Regulatory assets	17	46
Other	66	73
Total Current Assets	1,331	1,479
Investments
Nuclear decommissioning trust funds	1,236	1,241
Other	35	172
Total Investments	1,271	1,413
Property
Property, plant, and equipment	21,391	19,805
Less accumulated depreciation and amortization	(7,646)	(7,216)
Property, plant and equipment, net	13,745	12,589
Other Assets
Regulatory assets	2,969	2,913
Securitized regulatory assets	0	34
Intangible assets	34	37
Prepaid postretirement costs — affiliates	24	0
Other	180	182
Total Noncurrent Assets	3,207	3,166
Total Assets	19,554	18,647
Current Liabilities
Affiliates	40	60
Other	329	366
Accrued interest	62	58
Current portion long-term debt, including capital leases	157	118
Regulatory liabilities	19	150
Affiliates	75	84
Other	272	50
Other	138	151
Total Current Liabilities	1,092	1,037
Long-Term Debt (net of current portion)
Mortgage bonds, notes, and other	5,473	5,144
Capital lease obligations	15	0
Total Long-Term Debt (net of current portion)	5,488	5,144
Other Liabilities
Deferred income taxes	3,498	3,186
Regulatory liabilities	199	245
Asset retirement obligations	2,020	1,796
Unamortized investment tax credit	58	36
Nuclear decommissioning	177	182
Accrued pension liability — affiliates	976	1,200
Accrued postretirement liability — affiliates	307	520
Other	66	105
Total Noncurrent Liabilities	7,301	7,270
Commitments and Contingencies (Notes 8 and 17)	0	0
Equity
Common stock, without par value, 400,000,000 shares authorized, and 179,470,213 and 176,991,231 shares issued and outstanding, respectively	4,086	3,786
Retained earnings	1,585	1,436
Accumulated other comprehensive loss	2	(26)
Total DTE Energy Company Equity	5,673	5,196
Total Liabilities and Equity	$ 19,554	$ 18,647