Segment and Related Information (Financial Data) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Total operating revenues	$ (2,874)	$ (2,928)	$ (2,262)	$ (2,566)	$ (2,487)	$ (2,598)	$ (2,268)	$ (2,984)	$ (10,630)	$ (10,337)	$ (12,301)
Utility operations									6,497	6,238	6,884
Non-utility operations									4,133	4,099	5,417
Depreciation and amortization									976	852	1,145
Interest expense									472	450	429
Interest income									(20)	(13)	(10)
Equity in earnings of equity method investees									68	66	48
Income Tax Expense (Benefit)									271	230	364
Net Income (Loss) Attributable to DTE Energy Company	131	$ 338	$ 152	$ 247	80	$ 265	$ 109	$ 273	868	727	905
Investments in equity method investees	752				514				752	514	434
Capital expenditures and acquisitions									3,269	2,261	2,049
Goodwill	2,286				2,018				2,286	2,018	2,018
Total Assets	32,041				28,662				32,041	28,662	27,827
Gas Storage and Pipelines
Segment Reporting Information [Line Items]
Investments in equity method investees	538				296				538	296
Operating Segments | DTE Electric
Segment Reporting Information [Line Items]
Utility operations									5,225	4,901	5,283
Non-utility operations									0	0	0
Depreciation and amortization									750	637	933
Interest expense									264	258	250
Interest income									(8)	0	(1)
Equity in earnings of equity method investees									2	2	1
Income Tax Expense (Benefit)									353	290	296
Net Income (Loss) Attributable to DTE Energy Company									622	542	528
Investments in equity method investees	11				10				11	10	8
Capital expenditures and acquisitions									1,503	1,785	1,561
Goodwill	1,208				1,208				1,208	1,208	1,208
Total Assets	20,417				19,503				20,417	19,503	18,678
Operating Segments | DTE Gas
Segment Reporting Information [Line Items]
Utility operations									1,324	1,376	1,636
Non-utility operations									0	0	0
Depreciation and amortization									106	104	99
Interest expense									60	62	57
Interest income									(6)	(7)	(7)
Equity in earnings of equity method investees									6	6	7
Income Tax Expense (Benefit)									77	72	78
Net Income (Loss) Attributable to DTE Energy Company									138	132	140
Investments in equity method investees	10				9				10	9	10
Capital expenditures and acquisitions									395	273	224
Goodwill	743				743				743	743	743
Total Assets	4,729				4,294				4,729	4,294	4,242
Operating Segments | Gas Storage and Pipelines
Segment Reporting Information [Line Items]
Utility operations									0	0	0
Non-utility operations									302	243	203
Depreciation and amortization									45	30	34
Interest expense									39	24	22
Interest income									(9)	(8)	(6)
Equity in earnings of equity method investees									60	47	35
Income Tax Expense (Benefit)									71	70	53
Net Income (Loss) Attributable to DTE Energy Company									119	107	82
Investments in equity method investees	538				296				538	296	224
Capital expenditures and acquisitions									1,322	161	184
Goodwill	292				24				292	24	24
Total Assets	2,417				1,047				2,417	1,047	883
Operating Segments | Power and Industrial Projects
Segment Reporting Information [Line Items]
Utility operations									0	0	0
Non-utility operations									1,906	2,224	2,289
Depreciation and amortization									72	78	77
Interest expense									32	32	28
Interest income									(8)	(8)	(5)
Equity in earnings of equity method investees									0	8	5
Income Tax Expense (Benefit)									(140)	(140)	(100)
Net Income (Loss) Attributable to DTE Energy Company									95	16	90
Investments in equity method investees	166				183				166	183	184
Capital expenditures and acquisitions									39	36	77
Goodwill	26				26				26	26	26
Total Assets	683				860				683	860	998
Operating Segments | Energy Trading
Segment Reporting Information [Line Items]
Utility operations									0	0	0
Non-utility operations									2,575	2,459	3,762
Depreciation and amortization									3	2	1
Interest expense									6	6	7
Interest income									(1)	(2)	0
Equity in earnings of equity method investees									0	0	0
Income Tax Expense (Benefit)									(29)	(15)	77
Net Income (Loss) Attributable to DTE Energy Company									(45)	(22)	122
Investments in equity method investees	0				0				0	0	0
Capital expenditures and acquisitions									7	6	3
Goodwill	17				17				17	17	17
Total Assets	660				590				660	590	755
Corporate and Other
Segment Reporting Information [Line Items]
Utility operations									0	0	0
Non-utility operations									2	2	2
Depreciation and amortization									0	1	1
Interest expense									148	132	122
Interest income									(65)	(52)	(48)
Equity in earnings of equity method investees									0	3	0
Income Tax Expense (Benefit)									(61)	(47)	(40)
Net Income (Loss) Attributable to DTE Energy Company									(61)	(48)	(57)
Investments in equity method investees	27				16				27	16	8
Capital expenditures and acquisitions									3	0	0
Goodwill	0				0				0	0	0
Total Assets	4,648				3,496				4,648	3,496	3,177
Reclassifications and Eliminations
Segment Reporting Information [Line Items]
Total operating revenues									704	868	874
Utility operations									(52)	(39)	(35)
Non-utility operations									(652)	(829)	(839)
Depreciation and amortization									0	0	0
Interest expense									(77)	(64)	(57)
Interest income									77	64	57
Equity in earnings of equity method investees									0	0	0
Income Tax Expense (Benefit)									0	0	0
Net Income (Loss) Attributable to DTE Energy Company									0	0	0
Investments in equity method investees	0				0				0	0	0
Capital expenditures and acquisitions									0	0	0
Goodwill	0				0				0	0	0
Total Assets	$ (1,513)				$ (1,128)				(1,513)	(1,128)	(906)
Reclassifications and Eliminations | DTE Electric | Continuing Operations
Segment Reporting Information [Line Items]
Total operating revenues									43	36	29
Reclassifications and Eliminations | DTE Gas | Continuing Operations
Segment Reporting Information [Line Items]
Total operating revenues									9	3	6
Reclassifications and Eliminations | Gas Storage and Pipelines | Continuing Operations
Segment Reporting Information [Line Items]
Total operating revenues									9	8	9
Reclassifications and Eliminations | Power and Industrial Projects | Continuing Operations
Segment Reporting Information [Line Items]
Total operating revenues									602	785	794
Reclassifications and Eliminations | Energy Trading | Continuing Operations
Segment Reporting Information [Line Items]
Total operating revenues									39	32	33
Reclassifications and Eliminations | Corporate and Other | Continuing Operations
Segment Reporting Information [Line Items]
Total operating revenues									$ 2	$ 4	$ 3