Consolidated Statements of Operations (Unaudited) (USD $) In Millions, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Consolidated Statements of Operations [Abstract]
Operating Revenues	$ 2,028	$ 1,792	$ 4,459	$ 4,245
Operating Expenses
Fuel, purchased power and gas	771	608	1,842	1,603
Operation and maintenance	647	597	1,278	1,249
Depreciation, depletion and amortization	248	253	493	504
Taxes other than income	77	80	160	162
Asset (gains) and losses, reserves and impairments, net	(3)	(2)	8	(1)
Total operating expenses	1,740	1,536	3,781	3,517
Operating Income	288	256	678	728
Other (Income) and Deductions
Interest expense	124	136	250	276
Interest income	(2)	(3)	(5)	(6)
Other income	(18)	(23)	(39)	(42)
Other expenses	8	15	15	23
Total Other (Income) and Deductions	112	125	221	251
Income Before Income Taxes	176	131	457	477
Income Tax Provision (Benefit)	(24)	44	79	160
Net Income	200	87	378	317
Less: Net Income (Loss) Attributable to Noncontrolling Interests	(2)	1		2
Net Income Attributable to DTE Energy Company	$ 202	$ 86	$ 378	$ 315
Basic Earnings per Common Share
Net Income Attributable to DTE Energy Company	$ 1.19	$ 0.51	$ 2.23	$ 1.88
Diluted Earnings per Common Share
Net Income Attributable to DTE Energy Company	$ 1.19	$ 0.51	$ 2.23	$ 1.88
Weighted Average Common Shares Outstanding
Basic	169	169	169	167
Diluted	170	169	170	168
Dividends Declared per Common Share	$ 0.59	$ 0.53	$ 1.15	$ 1.06