Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Revenues
Utility operations	$ 7,288	$ 6,845	$ 6,638
Non-utility operations	7,676	4,578	5,530
Operating Revenues	14,964	11,423	12,168
Operating Expenses
Fuel, purchased power, and gas — utility	1,904	1,719	1,798
Fuel, purchased power, gas, and other — non-utility	7,304	4,120	5,035
Operation and maintenance	2,420	2,305	2,316
Depreciation and amortization	1,377	1,292	1,169
Taxes other than income	431	395	406
Asset (gains) losses and impairments, net	33	37	14
Operating Expenses	13,469	9,868	10,738
Operating Income	1,495	1,555	1,430
Other (Income) and Deductions
Interest expense	630	601	568
Interest income	(22)	(29)	(9)
Non-operating retirement benefits, net	17	50	39
Loss on extinguishment of debt	393	6	0
Other income	(254)	(259)	(250)
Other expenses	75	104	69
Other (Income) and Deductions	839	473	417
Income Before Income Taxes	656	1,082	1,013
Income Tax Expense (Benefit) (Note 10)	(130)	37	71
Net Income from Continuing Operations	786	1,045	942
Net Income from Discontinued Operations, Net of Taxes (Note 4)	117	326	230
Net Income	903	1,371	1,172
Less: Net Income (Loss) Attributable to Noncontrolling Interests
Continuing operations	(10)	(9)	(13)
Discontinued operations	6	12	16
Net Income Attributable to DTE Energy Company/DTE Electric Company	$ 907	$ 1,368	$ 1,169
Basic Earnings per Common Share
Continuing operations (in dollars per share)	$ 4.11	$ 5.46	$ 5.16
Discontinued operations (in dollars per share)	0.57	1.63	1.16
Basic Earnings per Common Share (in dollars per share)	4.68	7.09	6.32
Diluted Earnings per Common Share
Continuing operations (in dollars per share)	4.10	5.45	5.15
Discontinued operations (in dollars per share)	0.57	1.63	1.16
Diluted Earnings per Common Share (in dollars per share)	$ 4.67	$ 7.08	$ 6.31
Weighted Average Common Shares Outstanding
Basic (in shares)	193	193	185
Diluted (in shares)	194	193	185