Consolidated Statements of Operations (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating Revenues	$ 2,516	$ 2,239
Operating Expenses
Fuel, purchased power and gas	1,024	889
Operation and maintenance	735	721
Depreciation, depletion and amortization	259	227
Taxes other than income	94	95
Asset (gains) and losses, reserves and impairments, net	(6)	(5)
Total operating expenses	2,106	1,927
Operating Income	410	312
Other (Income) and Deductions
Interest expense	109	113
Interest income	(2)	(2)
Other income	(44)	(37)
Other expenses	7	7
Total Other (Income) and Deductions	70	81
Income Before Income Taxes	340	231
Income Tax Expense	105	73
Net Income	235	158
Less: Net Income Attributable to Noncontrolling Interests	1	2
Net Income Attributable to DTE Energy Company	$ 234	$ 156
Basic Earnings per Common Share
Net Income Attributable to DTE Energy Company	$ 1.35	$ 0.91
Income from continuing operations	$ 1.35	$ 0.91
Diluted Earnings per Common Share
Net Income Attributable to DTE Energy Company	$ 1.34	$ 0.91
Income from continuing operations	$ 1.34	$ 0.91
Weighted Average Common Shares Outstanding
Basic	173	170
Diluted	173	170
Dividends Declared per Common Share	$ 0.62	$ 0.59