Consolidated Statements of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Statement [Abstract]
Operating Revenue	$ 9,661	$ 8,791	$ 8,858
Operating Expenses
Fuel, purchased power and gas	4,055	3,296	3,537
Operation and maintenance	2,978	2,892	2,612
Depreciation, depletion and amortization	1,094	995	977
Taxes other than income	340	332	310
Asset (gains) and losses, reserves and impairments, net	(9)	(3)	1
Total operating expenses	8,458	7,512	7,437
Operating Income	1,203	1,279	1,421
Other (Income) and Deductions
Interest expense	436	440	488
Interest income	(9)	(10)	(10)
Other Income	(201)	(173)	(117)
Other expenses	55	62	69
Total Other (Income) and Deductions	281	319	430
Income Before Income Taxes	922	960	991
Income Tax Expense	254	286	268
Income from Continuing Operations	668	674	723
Discontinued Operations Income (Loss), net of tax	0	(56)	(3)
Net Income	668	618	720
Less: Net Income Attributable to Noncontrolling Interests	7	8	9
Net Income Attributable to DTE Energy Company	$ 661	$ 610	$ 711
Basic Earnings per Common Share
Income from continuing operations	$ 3.76	$ 3.89	$ 4.21
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share	$ 0.00	$ (0.33)	$ (0.02)
Total Basic Earnings per Common Share	$ 3.76	$ 3.56	$ 4.19
Diluted Earnings per Common Share
Income from continuing operations	$ 3.76	$ 3.88	$ 4.20
Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share	$ 0.00	$ (0.33)	$ (0.02)
Total Diluted Earnings per Common Share	$ 3.76	$ 3.55	$ 4.18
Weighted Average Common Shares Outstanding
Basic	175	171	169
Weighted Average Number Diluted Shares Outstanding Adjustment	175	172	170
Dividends Declared per Common Share	$ 2.59	$ 2.42	$ 2.32