DTE Energy (DTE) 10-Q 28 Apr 22 2022 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information	3 Months Ended
	Mar. 31, 2022shares
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2022
Document Transition Report	false
Entity File Number	1-11607
Entity Registrant Name	DTE Energy Co
Entity Incorporation, State or Country Code	MI
Entity Tax Identification Number	38-3217752
Entity Address, Address Line One	One Energy Plaza
Entity Address, City or Town	Detroit
Entity Address, State or Province	MI
Entity Address, Postal Zip Code	48226-1279
City Area Code	313
Local Phone Number	235-4000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding	193,739,166
Entity Central Index Key	0000936340
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
Amendment Flag	false
DTE Electric
Entity File Number	1-2198
Entity Registrant Name	DTE Electric Co
Entity Incorporation, State or Country Code	MI
Entity Tax Identification Number	38-0478650
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding	138,632,324
Entity Central Index Key	0000028385
Common stock, without par value
Title of 12(b) Security	Common stock, without par value
Trading Symbol	DTE
Security Exchange Name	NYSE
2017 Series E 5.25% Junior Subordinated Debentures due 2077
Title of 12(b) Security	2017 Series E 5.25% Junior Subordinated Debentures due 2077
Trading Symbol	DTW
Security Exchange Name	NYSE
2019 6.25% Corporate Units
Title of 12(b) Security	2019 6.25% Corporate Units
Trading Symbol	DTP
Security Exchange Name	NYSE
2020 Series G 4.375% Junior Subordinated Debentures due 2080
Title of 12(b) Security	2020 Series G 4.375% Junior Subordinated Debentures due 2080
Trading Symbol	DTB
Security Exchange Name	NYSE
2021 Series E 4.375% Junior Subordinated Debentures due 2081
Title of 12(b) Security	2021 Series E 4.375% Junior Subordinated Debentures due 2081
Trading Symbol	DTG
Security Exchange Name	NYSE

Consolidated Statements of Oper

Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating Revenues
Utility operations	$ 2,234	$ 1,953
Non-utility operations	2,343	1,628
Operating Revenues	4,577	3,581
Operating Expenses
Fuel, purchased power, and gas — utility	700	544
Fuel, purchased power, gas, and other — non-utility	2,242	1,595
Operation and maintenance	596	567
Depreciation and amortization	358	327
Taxes other than income	123	115
Operating Expenses	4,019	3,148
Operating Income	558	433
Other (Income) and Deductions
Interest expense	154	155
Interest income	(8)	(4)
Non-operating retirement benefits, net	(3)	4
Other income	(8)	(43)
Other expenses	13	10
Other (Income) and Deductions	148	122
Income Before Income Taxes	410	311
Income Tax Expense (Benefit) (Note 2)	16	(6)
Net Income from Continuing Operations	394	317
Net Income from Discontinued Operations, Net of Taxes (Note 4)	0	80
Net Income	394	397
Less: Net Income (Loss) Attributable to Noncontrolling Interests
Continuing operations	0	(3)
Discontinued operations	0	3
Net Income Attributable to DTE Energy Company/DTE Electric Company	$ 394	$ 397
Basic Earnings per Common Share
Continuing operations (in dollars per share)	$ 2.03	$ 1.65
Discontinued operations (in dollars per share)	0	0.40
Basic Earnings per Common Share (in dollars per share)	2.03	2.05
Diluted Earnings per Common Share
Continuing operations (in dollars per share)	2.03	1.65
Discontinued operations (in dollars per share)	0	0.40
Diluted Earnings per Common Share (in dollars per share)	$ 2.03	$ 2.05
Weighted Average Common Shares Outstanding
Basic (in shares)	193	194
Diluted (in shares)	194	194

Consolidated Statements of Op_2

Consolidated Statements of Operations (Unaudited) - DTE Electric Company - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating Revenues — Utility operations	$ 2,234	$ 1,953
Operating Expenses
Fuel, purchased power, and gas — utility	700	544
Taxes other than income	123	115
Operating Expenses	4,019	3,148
Operating Income	558	433
Other (Income) and Deductions
Interest expense	154	155
Non-operating retirement benefits, net	(3)	4
Other income	(8)	(43)
Other expenses	13	10
Other (Income) and Deductions	148	122
Income Before Income Taxes	410	311
Income Tax Expense	16	(6)
Net Income Attributable to DTE Energy Company/DTE Electric Company	394	397
DTE Electric
Operating Revenues — Utility operations	1,486	1,360
Operating Expenses
Fuel, purchased power, and gas — utility	440	362
Operation and maintenance	381	357
Depreciation and amortization	294	260
Taxes other than income	88	82
Operating Expenses	1,203	1,061
Operating Income	283	299
Other (Income) and Deductions
Interest expense	87	82
Non-operating retirement benefits, net	(1)	0
Other income	(16)	(19)
Other expenses	9	8
Other (Income) and Deductions	79	71
Income Before Income Taxes	204	228
Income Tax Expense	3	20
Net Income Attributable to DTE Energy Company/DTE Electric Company	$ 201	$ 208

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net Income	$ 394	$ 397
Other comprehensive income, net of tax:
Benefit obligations, net of taxes of $1 for both periods	3	2
Net unrealized gains (losses) on derivatives, net of taxes of $— for both periods	0	1
Other comprehensive income	3	3
Comprehensive income	397	400
Less: Comprehensive income attributable to noncontrolling interests	0	0
Comprehensive Income (Loss) Attributable to DTE Energy Company/DTE Electric Company	$ 397	$ 400

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Tax effect on benefit obligations	$ 1	$ 1
Tax effect on net unrealized gains (losses) on derivatives during the period	$ 0	$ 0

Consolidated Statements of Co_3

Consolidated Statements of Comprehensive Income (Unaudited) - DTE Electric Company - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Net Income	$ 394	$ 397
Other comprehensive income	3	3
Comprehensive Income (Loss) Attributable to DTE Energy Company/DTE Electric Company	397	400
DTE Electric
Net Income	201	208
Other comprehensive income	0	0
Comprehensive Income (Loss) Attributable to DTE Energy Company/DTE Electric Company	$ 201	$ 208

Consolidated Statements of Fina

Consolidated Statements of Financial Position (Unaudited) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Current Assets
Cash and cash equivalents	$ 150	$ 28
Restricted cash	6	7
Accounts receivable (less allowance for doubtful accounts of $100 and $92, respectively)
Customer	1,628	1,695
Other	184	135
Inventories
Fuel and gas	226	368
Materials, supplies, and other	503	490
Derivative assets	352	181
Regulatory assets	309	195
Other	252	218
Total Current Assets	3,610	3,317
Investments
Nuclear decommissioning trust funds	2,010	2,071
Investments in equity method investees	174	187
Other	175	194
Total Investments	2,359	2,452
Property
Property, plant, and equipment	37,606	37,083
Accumulated depreciation and amortization	(10,340)	(10,139)
Property, plant, and equipment, net	27,266	26,944
Other Assets
Goodwill	1,993	1,993
Regulatory assets	3,313	3,482
Securitized regulatory assets	229	0
Intangible assets	175	177
Notes receivable	319	310
Derivative assets	114	90
Prepaid postretirement costs	705	678
Operating lease right-of-use assets	93	97
Other	184	179
Total Other Assets	7,125	7,006
Total Assets	40,360	39,719
Current Liabilities
Accounts payable	1,320	1,414
Accrued interest	149	140
Dividends payable	171	171
Short-term borrowings	244	758
Current portion long-term debt, including securitization bonds and finance leases	2,645	2,874
Derivative liabilities	453	238
Gas inventory equalization	108	0
Regulatory liabilities	105	156
Operating lease liabilities	13	14
Other	472	581
Total Current Liabilities	5,680	6,346
Long-Term Debt (net of current portion)
Mortgage bonds, notes, and other	14,520	13,629
Securitization bonds	209	0
Junior subordinated debentures	883	883
Finance lease liabilities	17	19
Total Long-Term Debt (net of current portion)	15,629	14,531
Other Liabilities
Deferred income taxes	2,233	2,163
Regulatory liabilities	3,033	3,106
Asset retirement obligations	3,217	3,162
Unamortized investment tax credit	158	158
Derivative liabilities	280	192
Accrued pension liability	314	339
Accrued postretirement liability	350	358
Nuclear decommissioning	312	321
Operating lease liabilities	71	74
Other	216	256
Total Other Liabilities	10,184	10,129
Commitments and Contingencies (Notes 6 and 13)
Equity
Common stock (No par value, 400,000,000 shares authorized, and 193,739,166 and 193,747,509 shares issued and outstanding at March 31, 2022 and December 31, 2021, respectively)	5,310	5,379
Retained earnings	3,662	3,438
Accumulated other comprehensive loss	(109)	(112)
Total DTE Energy/DTE Electric Company Equity	8,863	8,705
Noncontrolling interests	4	8
Total Equity	8,867	8,713
Total Liabilities and Equity	$ 40,360	$ 39,719

Consolidated Statements of Fi_2

Consolidated Statements of Financial Position (Unaudited) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Current Assets
Allowance for doubtful accounts	$ 100	$ 92
Shareholder’s Equity
Common stock, shares authorized (in shares)	400,000,000	400,000,000
Common stock, shares issued (in shares)	193,739,166	193,747,509
Common stock, shares outstanding (in shares)	193,739,166	193,747,509
DTE Electric
Current Assets
Allowance for doubtful accounts	$ 53	$ 54
Shareholder’s Equity
Common stock, shares authorized (in shares)	400,000,000	400,000,000
Common stock, shares issued (in shares)	138,632,324	138,632,324
Common stock, shares outstanding (in shares)	138,632,324	138,632,324

Consolidated Statements of Fi_3

Consolidated Statements of Financial Position (Unaudited) - DTE Electric Company - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Current Assets
Cash and cash equivalents	$ 150	$ 28
Restricted cash	6	7
Accounts receivable (less allowance for doubtful accounts of $53 and $54, respectively)
Customer	1,628	1,695
Other	184	135
Inventories
Fuel	226	368
Materials and supplies	503	490
Regulatory assets	309	195
Other	252	218
Total Current Assets	3,610	3,317
Investments
Nuclear decommissioning trust funds	2,010	2,071
Other	175	194
Total Investments	2,359	2,452
Property
Property, plant, and equipment	37,606	37,083
Accumulated depreciation and amortization	(10,340)	(10,139)
Property, plant, and equipment, net	27,266	26,944
Other Assets
Regulatory assets	3,313	3,482
Securitized regulatory assets	229	0
Operating lease right-of-use assets	93	97
Other	184	179
Total Other Assets	7,125	7,006
Total Assets	40,360	39,719
Accounts payable
Accrued interest	149	140
Current portion long-term debt, including securitization bonds and finance leases	2,645	2,874
Regulatory liabilities	105	156
Short-term borrowings
Operating lease liabilities	13	14
Other	472	581
Total Current Liabilities	5,680	6,346
Long-Term Debt (net of current portion)
Securitization bonds	209	0
Finance lease liabilities	17	19
Total Long-Term Debt (net of current portion)	15,629	14,531
Other Liabilities
Deferred income taxes	2,233	2,163
Regulatory liabilities	3,033	3,106
Asset retirement obligations	3,217	3,162
Unamortized investment tax credit	158	158
Nuclear decommissioning	312	321
Operating lease liabilities	71	74
Other	216	256
Total Other Liabilities	10,184	10,129
Commitments and Contingencies (Notes 6 and 13)
Equity
Common stock ($10 par value, 400,000,000 shares authorized, and 138,632,324 shares issued and outstanding for both periods)	5,310	5,379
Retained earnings	3,662	3,438
Total DTE Energy/DTE Electric Company Equity	8,863	8,705
Total Liabilities and Equity	40,360	39,719
DTE Electric
Current Assets
Cash and cash equivalents	49	9
Restricted cash	1	0
Accounts receivable (less allowance for doubtful accounts of $53 and $54, respectively)
Customer	659	694
Affiliates	29	36
Other	100	40
Inventories
Fuel	156	171
Materials and supplies	319	316
Regulatory assets	255	168
Prepaid property tax	98	57
Other	49	44
Total Current Assets	1,715	1,535
Investments
Nuclear decommissioning trust funds	2,010	2,071
Other	45	44
Total Investments	2,055	2,115
Property
Property, plant, and equipment	29,260	28,849
Accumulated depreciation and amortization	(7,835)	(7,676)
Property, plant, and equipment, net	21,425	21,173
Other Assets
Regulatory assets	2,825	2,968
Securitized regulatory assets	229	0
Prepaid postretirement costs — affiliates	417	402
Operating lease right-of-use assets	62	64
Other	152	148
Total Other Assets	3,685	3,582
Total Assets	28,880	28,405
Accounts payable
Affiliates	77	83
Other	574	567
Accrued interest	88	95
Current portion long-term debt, including securitization bonds and finance leases	94	322
Regulatory liabilities	102	154
Short-term borrowings
Affiliates	0	53
Other	0	153
Operating lease liabilities	10	10
Other	179	206
Total Current Liabilities	1,124	1,643
Long-Term Debt (net of current portion)
Mortgage bonds, notes, and other	9,479	8,591
Securitization bonds	209	0
Finance lease liabilities	5	7
Total Long-Term Debt (net of current portion)	9,693	8,598
Other Liabilities
Deferred income taxes	2,791	2,741
Regulatory liabilities	2,145	2,221
Asset retirement obligations	2,984	2,932
Unamortized investment tax credit	158	158
Nuclear decommissioning	312	321
Accrued pension liability — affiliates	392	405
Accrued postretirement liability — affiliates	332	340
Operating lease liabilities	44	46
Other	78	97
Total Other Liabilities	9,236	9,261
Commitments and Contingencies (Notes 6 and 13)
Equity
Common stock ($10 par value, 400,000,000 shares authorized, and 138,632,324 shares issued and outstanding for both periods)	6,002	6,002
Retained earnings	2,825	2,901
Total DTE Energy/DTE Electric Company Equity	8,827	8,903
Total Liabilities and Equity	$ 28,880	$ 28,405

Consolidated Statements of Fi_4

Consolidated Statements of Financial Position (Unaudited) - DTE Electric Company (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Current Assets
Allowance for doubtful accounts	$ 100	$ 92
Shareholder’s Equity
Common stock, shares authorized (in shares)	400,000,000	400,000,000
Common stock, shares issued (in shares)	193,739,166	193,747,509
Common stock, shares outstanding (in shares)	193,739,166	193,747,509
Securitization bonds	$ 209	$ 0
DTE Electric
Current Assets
Allowance for doubtful accounts	$ 53	$ 54
Shareholder’s Equity
Par value (in dollars per share)	$ 10	$ 10
Common stock, shares authorized (in shares)	400,000,000	400,000,000
Common stock, shares issued (in shares)	138,632,324	138,632,324
Common stock, shares outstanding (in shares)	138,632,324	138,632,324
Securitization bonds	$ 209	$ 0

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating Activities
Net Income	$ 394	$ 397
Adjustments to reconcile Net Income to Net cash from operating activities:
Depreciation and amortization	358	368
Nuclear fuel amortization	3	15
Allowance for equity funds used during construction	(8)	(7)
Deferred income taxes	18	41
Equity (earnings) losses of equity method investees	11	(32)
Dividends from equity method investees	1	42
Asset (gains) losses and impairments, net	0	1
Changes in assets and liabilities:
Accounts receivable, net	18	107
Inventories	129	52
Prepaid postretirement benefit costs	(27)	(15)
Accounts payable	(42)	(20)
Gas inventory equalization	108	68
Accrued pension liability	(25)	(24)
Accrued postretirement liability	(8)	(3)
Derivative assets and liabilities	108	126
Regulatory assets and liabilities	(154)	128
Other current and noncurrent assets and liabilities	(76)	(187)
Net cash from operating activities	808	1,057
Investing Activities
Plant and equipment expenditures — utility	(737)	(630)
Plant and equipment expenditures — non-utility	(27)	(39)
Proceeds from sale of assets	0	1
Proceeds from sale of nuclear decommissioning trust fund assets	207	271
Investment in nuclear decommissioning trust funds	(209)	(273)
Distributions from equity method investees	2	4
Contributions to equity method investees	(1)	(2)
Notes receivable	(8)	(27)
Other	(9)	(10)
Net cash used for investing activities	(782)	(705)
Financing Activities
Issuance of long-term debt, net of discount and issuance costs	1,119	989
Redemption of long-term debt	(250)	0
Short-term borrowings, net	(514)
Short-term borrowings, net		14
Repurchase of common stock	(55)	(54)
Dividends paid on common stock	(171)	(210)
Contributions from noncontrolling interests	1	12
Distributions to noncontrolling interests	(5)	(14)
Other	(30)	(35)
Net cash from financing activities	95	702
Net Increase in Cash, Cash Equivalents, and Restricted Cash	121	1,054
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	35	516
Cash, Cash Equivalents, and Restricted Cash at End of Period	156	1,570
Supplemental disclosure of non-cash investing and financing activities
Plant and equipment expenditures in accounts payable	$ 300	$ 208

Consolidated Statements of Ca_2

Consolidated Statements of Cash Flows (Unaudited) - DTE Electric Company - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating Activities
Net Income	$ 394	$ 397
Adjustments to reconcile Net Income to Net cash from operating activities:
Depreciation and amortization	358	368
Nuclear fuel amortization	3	15
Allowance for equity funds used during construction	(8)	(7)
Deferred income taxes	18	41
Asset (gains) losses and impairments, net	0	1
Changes in assets and liabilities:
Accounts receivable, net	18	107
Inventories	129	52
Accounts payable	(42)	(20)
Regulatory assets and liabilities	(154)	128
Other current and noncurrent assets and liabilities	(76)	(187)
Net cash from operating activities	808	1,057
Investing Activities
Proceeds from sale of nuclear decommissioning trust fund assets	207	271
Investment in nuclear decommissioning trust funds	(209)	(273)
Other	(9)	(10)
Net cash used for investing activities	(782)	(705)
Financing Activities
Issuance of long-term debt, net of discount and issuance costs	1,119	989
Redemption of long-term debt	(250)	0
Dividends paid on common stock	(171)	(210)
Other	(30)	(35)
Net cash from financing activities	95	702
Net Increase in Cash, Cash Equivalents, and Restricted Cash	121	1,054
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	35	516
Cash, Cash Equivalents, and Restricted Cash at End of Period	156	1,570
Supplemental disclosure of non-cash investing and financing activities
Plant and equipment expenditures in accounts payable	300	208
DTE Electric
Operating Activities
Net Income	201	208
Adjustments to reconcile Net Income to Net cash from operating activities:
Depreciation and amortization	294	260
Nuclear fuel amortization	3	15
Allowance for equity funds used during construction	(7)	(6)
Deferred income taxes	0	15
Changes in assets and liabilities:
Accounts receivable, net	(18)	114
Inventories	12	24
Accounts payable	34	(8)
Prepaid postretirement benefit costs — affiliates	(15)	(8)
Accrued pension liability — affiliates	(13)	(12)
Accrued postretirement liability — affiliates	(8)	(2)
Regulatory assets and liabilities	(165)	121
Other current and noncurrent assets and liabilities	(33)	(150)
Net cash from operating activities	285	571
Investing Activities
Plant and equipment expenditures	(609)	(502)
Proceeds from sale of nuclear decommissioning trust fund assets	207	271
Investment in nuclear decommissioning trust funds	(209)	(273)
Other	(8)	(9)
Net cash used for investing activities	(619)	(513)
Financing Activities
Issuance of long-term debt, net of discount and issuance costs	1,119	989
Redemption of long-term debt	(250)	0
Short-term borrowings, net — affiliate	(53)	(23)
Short-term borrowings, net — other	(153)	0
Dividends paid on common stock	(277)	(147)
Other	(11)	(15)
Net cash from financing activities	375	804
Net Increase in Cash, Cash Equivalents, and Restricted Cash	41	862
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	9	16
Cash, Cash Equivalents, and Restricted Cash at End of Period	50	878
Supplemental disclosure of non-cash investing and financing activities
Plant and equipment expenditures in accounts payable	$ 251	$ 141

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity (Unaudited) - USD ($) $ in Millions	Total	Common Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests
Beginning Balance (in shares) at Dec. 31, 2020		193,771,000
Beginning Balance at Dec. 31, 2020	$ 12,589	$ 5,406	$ 7,156	$ (137)	$ 164
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	397		397		0
Dividends declared on common stock	(210)		(210)
Repurchase of common stock (in shares)		(430,000)
Repurchase of common stock	(54)	$ (54)
Other comprehensive income (loss) , net of tax	3			3
Stock-based compensation, net distributions to noncontrolling interests, and other (in shares)		386,000
Stock-based compensation, net distributions to noncontrolling interests, and other	(11)	$ (8)	(1)		(2)
Ending Balance (in shares) at Mar. 31, 2021		193,727,000
Ending Balance at Mar. 31, 2021	$ 12,714	$ 5,344	7,342	(134)	162
Beginning Balance (in shares) at Dec. 31, 2021	193,747,509	193,748,000
Beginning Balance at Dec. 31, 2021	$ 8,713	$ 5,379	3,438	(112)	8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	394		394
Dividends declared on common stock	(171)		(171)
Repurchase of common stock (in shares)		(465,000)
Repurchase of common stock	(55)	$ (55)
Other comprehensive income (loss) , net of tax	3			3
Stock-based compensation, net distributions to noncontrolling interests, and other (in shares)		456,000
Stock-based compensation, net distributions to noncontrolling interests, and other	$ (17)	$ (14)	1		(4)
Ending Balance (in shares) at Mar. 31, 2022	193,739,166	193,739,000
Ending Balance at Mar. 31, 2022	$ 8,867	$ 5,310	$ 3,662	$ (109)	$ 4

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Stockholders' Equity [Abstract]
Dividends declared on common stock (in dollars per share)	$ 0.89	$ 1.09

Consolidated Statements of Ch_3

Consolidated Statements of Changes in Equity (Unaudited) - DTE Electric Company - USD ($) $ in Millions	Total	Common Stock	Retained Earnings	DTE Electric	DTE ElectricCommon Stock	DTE ElectricAdditional Paid-in Capital	DTE ElectricRetained Earnings
Beginning Balance (in shares) at Dec. 31, 2020		193,771,000			138,632,000
Beginning Balance at Dec. 31, 2020				$ 8,070	$ 1,386	$ 4,061	$ 2,623
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	$ 397			208			208
Dividends declared on common stock	$ (210)		$ (210)	(147)			(147)
Ending Balance (in shares) at Mar. 31, 2021		193,727,000			138,632,000
Ending Balance at Mar. 31, 2021				$ 8,131	$ 1,386	4,061	2,684
Beginning Balance (in shares) at Dec. 31, 2021	193,747,509	193,748,000		138,632,324	138,632,000
Beginning Balance at Dec. 31, 2021	$ 8,705			$ 8,903	$ 1,386	4,616	2,901
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	394			201			201
Dividends declared on common stock	$ (171)		$ (171)	$ (277)			(277)
Ending Balance (in shares) at Mar. 31, 2022	193,739,166	193,739,000		138,632,324	138,632,000
Ending Balance at Mar. 31, 2022	$ 8,863			$ 8,827	$ 1,386	$ 4,616	$ 2,825

Organization and Basis of Prese

Organization and Basis of Presentation	3 Months Ended
	Mar. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Basis of Presentation	ORGANIZATION AND BASIS OF PRESENTATION Corporate Structure DTE Energy owns the following businesses: • DTE Electric is a public utility engaged in the generation, purchase, distribution, and sale of electricity to approximately 2.3 million customers in southeastern Michigan; • DTE Gas is a public utility engaged in the purchase, storage, transportation, distribution, and sale of natural gas to approximately 1.3 million customers throughout Michigan and the sale of storage and transportation capacity; and • Other businesses include (1) DTE Vantage, which is primarily involved in renewable natural gas projects and providing industrial energy services and was formerly involved in reduced emissions fuel projects until 2022, and 2) energy marketing and trading operations. DTE Electric and DTE Gas are regulated by the MPSC. Certain activities of DTE Electric and DTE Gas, as well as various other aspects of businesses under DTE Energy, are regulated by the FERC. In addition, the Registrants are regulated by other federal and state regulatory agencies including the NRC, the EPA, EGLE, and for DTE Energy, the CFTC and CARB. Basis of Presentation The Consolidated Financial Statements should be read in conjunction with the Combined Notes to Consolidated Financial Statements included in the combined DTE Energy and DTE Electric 2021 Annual Report on Form 10-K. The accompanying Consolidated Financial Statements of the Registrants are prepared using accounting principles generally accepted in the United States of America. These accounting principles require management to use estimates and assumptions that impact reported amounts of assets, liabilities, revenues and expenses, and the disclosure of contingent assets and liabilities. Actual results may differ from the Registrants' estimates. The Consolidated Financial Statements are unaudited but, in the Registrants' opinions, include all adjustments necessary to present a fair statement of the results for the interim periods. All adjustments are of a normal recurring nature, except as otherwise disclosed in these Consolidated Financial Statements and Combined Notes to Consolidated Financial Statements. Financial results for this interim period are not necessarily indicative of results that may be expected for any other interim period or for the fiscal year ending December 31, 2022. The information in these combined notes relates to each of the Registrants as noted in the Index of Combined Notes to Consolidated Financial Statements. However, DTE Electric does not make any representation as to information related solely to DTE Energy or the subsidiaries of DTE Energy other than itself. Certain prior year balances for the Registrants were reclassified to match the current year's Consolidated Financial Statements presentation. Separation of DT Midstream On July 1, 2021, DTE Energy completed the separation of DT Midstream, its former natural gas pipeline, storage and gathering non-utility business. Financial results of DT Midstream are presented as Income from discontinued operations, net of taxes on DTE Energy's Consolidated Statements of Operations. Prior periods have been recast to reflect this presentation. No adjustments were made to the historical activity within the Consolidated Statements of Comprehensive Income, Consolidated Statements of Cash Flows, or the Consolidated Statements of Changes in Equity. Unless noted otherwise, discussion in the Notes to the Consolidated Financial Statements relate to continuing operations. Refer to Note 4 to the Consolidated Financial Statements, “Discontinued Operations,” for additional information. Principles of Consolidation The Registrants consolidate all majority-owned subsidiaries and investments in entities in which they have controlling influence. Non-majority owned investments are accounted for using the equity method when the Registrants are able to significantly influence the operating policies of the investee. When the Registrants do not influence the operating policies of an investee, the equity investment is valued at cost minus any impairments, if applicable. These Consolidated Financial Statements also reflect the Registrants' proportionate interests in certain jointly-owned utility plants. The Registrants eliminate all intercompany balances and transactions. The Registrants evaluate whether an entity is a VIE whenever reconsideration events occur. The Registrants consolidate VIEs for which they are the primary beneficiary. If a Registrant is not the primary beneficiary and an ownership interest is held, the VIE is accounted for under the equity method of accounting. When assessing the determination of the primary beneficiary, a Registrant considers all relevant facts and circumstances, including: the power, through voting or similar rights, to direct the activities of the VIE that most significantly impact the VIE's economic performance and the obligation to absorb the expected losses and/or the right to receive the expected returns of the VIE. The Registrants perform ongoing reassessments of all VIEs to determine if the primary beneficiary status has changed. Legal entities within the DTE Vantage segment enter into long-term contractual arrangements with customers to supply energy-related products or services. The entities are generally designed to pass-through the commodity risk associated with these contracts to the customers, with DTE Energy retaining operational and customer default risk. These entities generally are VIEs and consolidated when DTE Energy is the primary beneficiary. In addition, DTE Energy has interests in certain VIEs through which control of all significant activities is shared with partners, and therefore are generally accounted for under the equity method. The Registrants hold ownership interests in certain limited partnerships. The limited partnerships include investment funds which support regional development and economic growth, and an operational business providing energy-related products. These entities are generally VIEs as a result of certain characteristics of the limited partnership voting rights. The ownership interests are accounted for under the equity method as the Registrants are not the primary beneficiaries. DTE Energy has variable interests in VIEs through certain of its long-term purchase and sale contracts. DTE Electric has variable interests in VIEs through certain of its long-term purchase contracts. As of March 31, 2022, the carrying amount of assets and liabilities in DTE Energy's Consolidated Statements of Financial Position that relate to its variable interests under long-term purchase and sale contracts are predominantly related to working capital accounts and generally represent the amounts owed by or to DTE Energy for the deliveries associated with the current billing cycle under the contracts. As of March 31, 2022, the carrying amount of assets and liabilities in DTE Electric's Consolidated Statements of Financial Position that relate to its variable interests under long-term purchase contracts are predominantly related to working capital accounts and generally represent the amounts owed by DTE Electric for the deliveries associated with the current billing cycle under the contracts. The Registrants have not provided any significant form of financial support associated with these long-term contracts. There is no material potential exposure to loss as a result of DTE Energy's variable interests through these long-term purchase and sale contracts. In addition, there is no material potential exposure to loss as a result of DTE Electric's variable interests through these long-term purchase contracts. In the first quarter 2022, DTE Electric financed regulatory assets for previously deferred costs related to the River Rouge generation plant and tree trimming surge program through the sale of bonds by a wholly-owned special purpose entity, DTE Securitization. DTE Securitization is a VIE. DTE Electric has the power to direct the most significant activities of DTE Securitization, including performing servicing activities such as billing and collecting surcharge revenue. Accordingly, DTE Electric is the primary beneficiary and DTE Securitization is consolidated by the Registrants. The maximum risk exposure for consolidated VIEs is reflected on the Registrants' Consolidated Statements of Financial Position. For non-consolidated VIEs, the maximum risk exposure of the Registrants is generally limited to their investment, notes receivable, and future funding commitments. The following table summarizes the major Consolidated Statements of Financial Position items for consolidated VIEs as of March 31, 2022 and December 31, 2021. All assets and liabilities of a consolidated VIE are presented where it has been determined that a consolidated VIE has either (1) assets that can be used only to settle obligations of the VIE or (2) liabilities for which creditors do not have recourse to the general credit of the primary beneficiary. VIEs, in which DTE Energy holds a majority voting interest and is the primary beneficiary, that meet the definition of a business and whose assets can be used for purposes other than the settlement of the VIE's obligations have been excluded from the table below. Amounts for the Registrants' consolidated VIEs are as follows: March 31, 2022 December 31, 2021 DTE Energy DTE Electric (a) DTE Energy (In millions) ASSETS Cash and cash equivalents $ 10 $ — $ 11 Restricted cash 4 1 6 Securitized regulatory assets 229 229 — Notes receivable 80 — 70 Other current and long-term assets 10 2 8 $ 333 $ 232 $ 95 LIABILITIES Short-term borrowings $ 82 $ — $ 75 Securitization bonds (b) 230 230 — Other current and long-term liabilities 7 1 5 $ 319 $ 231 $ 80 _______________________________________ (a) DTE Electric amounts reflect DTE Securitization, which was a new VIE beginning the first quarter of 2022. See Note 6 to the Consolidated Financial Statements, "Regulatory Matters." (b) Includes $21 million reported in Current portion of long-term debt on the Registrants' Consolidated Statements of Financial Position for the period ended March 31, 2022. Amounts for DTE Energy's non-consolidated VIEs are as follows: March 31, 2022 December 31, 2021 (In millions) Investments in equity method investees $ 157 $ 172 Notes receivable $ 13 $ 13 Future funding commitments $ 3 $ 3

Significant Accounting Policies

Significant Accounting Policies	3 Months Ended
	Mar. 31, 2022
Accounting Policies [Abstract]
Significant Accounting Policies	SIGNIFICANT ACCOUNTING POLICIES Other Income The following is a summary of DTE Energy's Other income: Three Months Ended March 31, 2022 2021 (In millions) Allowance for equity funds used during construction $ 8 $ 7 Contract services 7 8 Income from REF entities — 24 Gains from rabbi trust securities (a) — 2 Equity earnings (losses) of equity method investees (11) 1 Other 4 1 $ 8 $ 43 _______________________________________ (a) Losses from rabbi trust securities are recorded separately to Other expenses on the Consolidated Statements of Operations. The following is a summary of DTE Electric's Other income: Three Months Ended March 31, 2022 2021 (In millions) Contract services $ 7 $ 8 Allowance for equity funds used during construction 7 6 Gains from rabbi trust securities allocated from DTE Energy (a) — 2 Other 2 3 $ 16 $ 19 _______________________________________ (a) Losses from rabbi trust securities are recorded separately to Other expenses on the Consolidated Statements of Operations. Changes in Accumulated Other Comprehensive Income (Loss) Comprehensive income (loss) is the change in common shareholders' equity during a period from transactions and events from non-owner sources, including Net Income. The amounts recorded to Accumulated other comprehensive income (loss) for DTE Energy include changes in benefit obligations, consisting of deferred actuarial losses and prior service costs, unrealized gains and losses from derivatives accounted for as cash flow hedges, and foreign currency translation adjustments. DTE Energy releases income tax effects from accumulated other comprehensive income when the circumstances upon which they are premised cease to exist. Changes in Accumulated other comprehensive income (loss) are presented in DTE Energy's Consolidated Statements of Changes in Equity and DTE Electric's Consolidated Statements of Changes in Shareholder's Equity. For the three months ended March 31, 2022 and 2021, reclassifications out of Accumulated other comprehensive income (loss) were not material. Income Taxes The interim effective tax rates of the Registrants are as follows: Effective Tax Rate Three Months Ended March 31, 2022 2021 DTE Energy 4 % (2) % DTE Electric 2 % 9 % These tax rates are affected by estimated annual permanent items, including AFUDC equity, production tax credits, and other flow-through items, as well as discrete items that may occur in any given period, but are not consistent from period to period. The 6% increase in DTE Energy’s effective tax rate for the three months ended March 31, 2022 was primarily due to an increase of 8% due to the closure of the REF business and resulting decrease in production tax credits, partially offset by higher amortization of the TCJA regulatory liability of 2%. The 7% decrease in DTE Electric's effective tax rate for the three months ended March 31, 2022 was primarily due to higher amortization of the TCJA regulatory liability, which was driven by the accelerated amortization approved in DTE Electric's 2021 accounting application to the MPSC. DTE Electric had income tax receivables with DTE Energy related to federal and state taxes of $28 million and $33 million at March 31, 2022 and December 31, 2021, respectively, which are included in Accounts Receivable - Affiliates on the DTE Electric Consolidated Statements of Financial Position. DTE Electric also had income tax payables with DTE Energy related to state taxes of $2 million at December 31, 2021, which is included in Accounts Payable - Affiliates on the DTE Electric Consolidated Statements of Financial Position. Unrecognized Compensation Costs As of March 31, 2022, DTE Energy had $109 million of total unrecognized compensation cost related to non-vested stock incentive plan arrangements. That cost is expected to be recognized over a weighted-average period of 1.8 years. Allocated Stock-Based Compensation DTE Electric received an allocation of costs from DTE Energy associated with stock-based compensation of $12 million and $14 million for the three months ended March 31, 2022 and 2021, respectively. Cash, Cash Equivalents, and Restricted Cash Cash and cash equivalents include cash on hand, cash in banks, and temporary investments purchased with remaining maturities of three months or less. Restricted cash consists of funds held in separate bank accounts to satisfy contractual obligations, fund certain construction projects, and guarantee performance. Restricted cash also includes amounts at DTE Securitization to pay for debt service and other qualified costs. Restricted cash designated for payments within one year is classified as a Current Asset. Financing Receivables Financing receivables are primarily composed of trade receivables, notes receivable, and unbilled revenue. The Registrants' financing receivables are stated at net realizable value. The Registrants monitor the credit quality of their financing receivables on a regular basis by reviewing credit quality indicators and monitoring for trigger events, such as a credit rating downgrade or bankruptcy. Credit quality indicators include, but are not limited to, ratings by credit agencies where available, collection history, collateral, counterparty financial statements and other internal metrics. Utilizing such data, the Registrants have determined three internal grades of credit quality. Internal grade 1 includes financing receivables for counterparties where credit rating agencies have ranked the counterparty as investment grade. To the extent credit ratings are not available, the Registrants utilize other credit quality indicators to determine the level of risk associated with the financing receivable. Internal grade 1 may include financing receivables for counterparties for which credit rating agencies have ranked the counterparty as below investment grade; however, due to favorable information on other credit quality indicators, the Registrants have determined the risk level to be similar to that of an investment grade counterparty. Internal grade 2 includes financing receivables for counterparties with limited credit information and those with a higher risk profile based upon credit quality indicators. Internal grade 3 reflects financing receivables for which the counterparties have the greatest level of risk, including those in bankruptcy status. The following represents the Registrants' financing receivables by year of origination, classified by internal grade of credit risk. The related credit quality indicators and risk ratings utilized to develop the internal grades have been updated through March 31, 2022. DTE Energy DTE Electric Year of Origination 2022 2021 2020 and Prior Total 2022 and Prior (In millions) Notes receivable Internal grade 1 $ — $ — $ 19 $ 19 $ 14 Internal grade 2 1 16 91 108 3 Total notes receivable (a) $ 1 $ 16 $ 110 $ 127 $ 17 Net investment in leases Net investment in leases, internal grade 1 $ — $ — $ 38 $ 38 $ — Net investment in leases, internal grade 2 — — 191 191 — Total net investment in leases (a) $ — $ — $ 229 $ 229 $ — _______________________________________ (a) For DTE Energy, included in Current Assets — Other and Other Assets — Notes Receivable on the Consolidated Statements of Financial Position. For DTE Electric, included in Current Assets — Other on the Consolidated Statements of Financial Position. The allowance for doubtful accounts on accounts receivable for the utility entities is generally calculated using an aging approach that utilizes rates developed in reserve studies. DTE Electric and DTE Gas establish an allowance for uncollectible accounts based on historical losses and management's assessment of existing and future economic conditions, customer trends and other factors. Customer accounts are generally considered delinquent if the amount billed is not received by the due date, which is typically in 21 days, however, factors such as assistance programs may delay aggressive action. DTE Electric and DTE Gas generally assess late payment fees on trade receivables based on past-due terms with customers. Customer accounts are written off when collection efforts have been exhausted. The time period for write-off is 150 days after service has been terminated. The customer allowance for doubtful accounts for non-utility businesses and other receivables for both utility and non-utility businesses is generally calculated based on specific review of probable future collections based on receivable balances generally in excess of 30 days. Existing and future economic conditions, customer trends and other factors are also considered. Receivables are written off on a specific identification basis and determined based upon the specific circumstances of the associated receivable. Notes receivable for DTE Energy are primarily comprised of finance lease receivables and loans that are included in Notes Receivable and Other current assets on DTE Energy's Consolidated Statements of Financial Position. Notes receivable for DTE Electric are primarily comprised of loans. Notes receivable are typically considered delinquent when payment is not received for periods ranging from 60 to 120 days. The Registrants cease accruing interest (nonaccrual status), consider a note receivable impaired, and establish an allowance for credit loss when it is probable that all principal and interest amounts due will not be collected in accordance with the contractual terms of the note receivable. In determining the allowance for credit losses for notes receivable, the Registrants consider the historical payment experience and other factors that are expected to have a specific impact on the counterparty's ability to pay including existing and future economic conditions. Cash payments received on nonaccrual status notes receivable, that do not bring the account contractually current, are first applied to the contractually owed past due interest, with any remainder applied to principal. Accrual of interest is generally resumed when the note receivable becomes contractually current. The following tables present a roll-forward of the activity for the Registrants' financing receivables credit loss reserves: DTE Energy DTE Electric Trade accounts receivable Other receivables Total Trade and other accounts receivable (In millions) Beginning reserve balance, January 1, 2022 $ 89 $ 3 $ 92 $ 54 Current period provision 20 — 20 8 Write-offs charged against allowance (25) — (25) (18) Recoveries of amounts previously written off 13 — 13 9 Ending reserve balance, March 31, 2022 $ 97 $ 3 $ 100 $ 53 DTE Energy DTE Electric Trade accounts receivable Other receivables Total Trade and other accounts receivable (In millions) Beginning reserve balance, January 1, 2021 $ 101 $ 3 $ 104 $ 57 Current period provision 53 1 54 36 Write-offs charged against allowance (126) (1) (127) (77) Recoveries of amounts previously written off 61 — 61 38 Ending reserve balance, December 31, 2021 $ 89 $ 3 $ 92 $ 54 Uncollectible expense for the Registrants is primarily comprised of the current period provision for allowance for doubtful accounts and is summarized as follows: Three Months Ended March 31, 2022 2021 (In millions) DTE Energy $ 20 $ 31 DTE Electric $ 8 $ 11 There are no material amounts of past due financing receivables for the Registrants as of March 31, 2022.

New Accounting Pronouncements

New Accounting Pronouncements	3 Months Ended
	Mar. 31, 2022
Accounting Standards Update and Change in Accounting Principle [Abstract]
New Accounting Pronouncements	NEW ACCOUNTING PRONOUNCEMENTS Recently Adopted Pronouncements In July 2021, the FASB issued ASU No. 2021-05, Leases (Topic 842): Lessors – Certain Leases with Variable Lease Payments. The amendments in this update modify lease classification requirements for lessors, providing that lease contracts with variable lease payments that do not depend on a reference index or a rate should be classified as operating leases if they would have been classified as a sales-type or direct financing lease and resulted in the recognition of a selling loss at lease commencement. The Registrants adopted the ASU effective January 1, 2022 using the prospective approach. The adoption of the ASU did not have a significant impact on the Registrants' Consolidated Financial Statements. In October 2021, the FASB issued ASU No. 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers . The amendments in this update require contract assets and contract liabilities acquired in a business combination to be recognized and measured by the acquirer on the acquisition date in accordance with ASC 606, Revenue from Contracts with Customers . Historically, such amounts were recognized by the acquirer at fair value in acquisition accounting. The Registrants early adopted the ASU effective January 1, 2022, which had no impact on the Registrants' Consolidated Financial Statements for the current period. The Registrants will apply the guidance prospectively to any future business combinations. Recently Issued Pronouncements In March 2022, the FASB issued ASU No. 2022-02, Financial Instruments – Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures. The amendments in this update eliminate the accounting guidance for troubled debt restructurings by creditors that have adopted the Current Expected Credit Loss (“CECL”) model under ASC 326 and enhance the disclosure requirements for loan refinancings and restructurings made with borrowers experiencing financial difficulty. Additionally, the amendments require the disclosure of current period gross write-offs for financing receivables and net investment in leases by year of origination in the vintage disclosures. The ASU is effective for the Registrants for fiscal years beginning after December 15, 2022, and interim periods therein. Early adoption is permitted. The Registrants will apply the guidance prospectively after the effective date.

Discontinued Operations

Discontinued Operations	3 Months Ended
	Mar. 31, 2022
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	DISCONTINUED OPERATIONS Separation of DT Midstream On July 1, 2021, DTE Energy completed the separation of DT Midstream, its former natural gas pipeline, storage, and gathering non-utility business. The table below reflects the financial results of DT Midstream that are included in discontinued operations within the Consolidated Statements of Operations. These results include the impact of tax-related adjustments and all transaction costs related to the separation. General corporate overhead costs have been excluded and no portion of corporate interest costs were allocated to discontinued operations. Three Months Ended March 31, 2021 (In millions) Operating Revenues — Non-utility operations $ 197 Operating Expenses Cost of gas and other — non-utility 5 Operation and maintenance (a) 41 Depreciation and amortization 41 Taxes other than income 7 Asset (gains) losses and impairments, net (1) 93 Operating Income 104 Other (Income) and Deductions Interest expense 26 Interest income (3) Other income (33) (10) Income from Discontinued Operations Before Income Taxes 114 Income Tax Expense 34 Net Income from Discontinued Operations, Net of Taxes 80 Less: Net Income Attributable to Noncontrolling Interests 3 Net Income from Discontinued Operations $ 77 _______________________________________ (a) Includes separation transaction costs of $10 million for the three months ended March 31, 2021 for various legal, accounting and other professional services fees. The following table is a summary of significant non-cash items and capital expenditures of discontinued operations included in DTE Energy's Consolidated Statements of Cash Flows: Three Months Ended March 31, 2021 (In millions) Operating Activities Depreciation and amortization $ 41 Deferred income taxes 33 Equity earnings of equity method investees (31) Investing Activities Plant and equipment expenditures — non-utility $ (27)

Revenue

Revenue	3 Months Ended
	Mar. 31, 2022
Revenue from Contract with Customer [Abstract]
Revenue	REVENUE Disaggregation of Revenue The following is a summary of revenues disaggregated by segment for DTE Energy: Three Months Ended March 31, 2022 2021 (In millions) Electric (a) Residential $ 700 $ 672 Commercial 477 451 Industrial 161 159 Other (b) 152 82 Total Electric operating revenues $ 1,490 $ 1,364 Gas Gas sales $ 596 $ 461 End User Transportation 98 85 Intermediate Transportation 29 26 Other (b) 43 40 Total Gas operating revenues $ 766 $ 612 Other segment operating revenues DTE Vantage $ 179 $ 366 Energy Trading $ 2,203 $ 1,439 _______________________________________ (a) Revenues generally represent those of DTE Electric, except $4 million of Other revenues related to DTE Sustainable Generation for the three months ended March 31, 2022 and 2021. (b) Includes revenue adjustments related to various regulatory mechanisms. Revenues included the following which were outside the scope of Topic 606: Three Months Ended March 31, 2022 2021 (In millions) Electric — Other revenues $ 4 $ 3 Gas — Other revenues $ 2 $ 2 DTE Vantage — Leases $ 20 $ 21 Energy Trading — Derivatives $ 1,734 $ 1,146 Deferred Revenue The following is a summary of deferred revenue activity: DTE Energy (In millions) Beginning Balance, January 1, 2022 $ 78 Increases due to cash received or receivable, excluding amounts recognized as revenue during the period 27 Revenue recognized that was included in the deferred revenue balance at the beginning of the period (26) Ending Balance, March 31, 2022 $ 79 The deferred revenues at DTE Energy generally represent amounts paid by or receivable from customers for which the associated performance obligation has not yet been satisfied. Deferred revenues include amounts associated with REC performance obligations under certain wholesale full requirements power contracts. Deferred revenues associated with RECs are recognized as revenue when control of the RECs has transferred. Other performance obligations associated with deferred revenues include providing products and services related to customer prepayments. Deferred revenues associated with these products and services are recognized when control has transferred to the customer. The following table represents deferred revenue amounts for DTE Energy that are expected to be recognized as revenue in future periods: DTE Energy (In millions) 2022 $ 68 2023 8 2024 1 2025 — 2026 — 2027 and thereafter 2 $ 79 Transaction Price Allocated to the Remaining Performance Obligations In accordance with optional exemptions available under Topic 606, the Registrants did not disclose the value of unsatisfied performance obligations for (1) contracts with an original expected length of one year or less, (2) with the exception of fixed consideration, contracts for which revenue is recognized at the amount to which the Registrants have the right to invoice for goods provided and services performed, and (3) contracts for which variable consideration relates entirely to an unsatisfied performance obligation. Such contracts consist of varying types of performance obligations across the segments, including the supply and delivery of energy related products and services. Contracts with variable volumes and/or variable pricing, including those with pricing provisions tied to a consumer price or other index, have also been excluded as the related consideration under the contract is variable at inception of the contract. Contract lengths vary from cancellable to multi-year. The Registrants expect to recognize revenue for the following amounts related to fixed consideration associated with remaining performance obligations in each of the future periods noted: DTE Energy DTE Electric (In millions) 2022 $ 218 $ 6 2023 296 7 2024 183 7 2025 106 1 2026 63 — 2027 and thereafter 365 — $ 1,231 $ 21

Regulatory Matters

Regulatory Matters	3 Months Ended
	Mar. 31, 2022
Public Utilities, General Disclosures [Abstract]
Regulatory Matters	REGULATORY MATTERS 2021 Securitization Filing On June 23, 2021, the MPSC issued a financing order authorizing DTE Electric to issue Securitization bonds for qualified costs of up to $236 million, including $73 million for the net book value of the River Rouge generation plant, $157 million for tree trimming surge program costs, and $6 million for other qualified costs. The financing order further authorized customer charges for the timely recovery of the debt service costs on the Securitization bonds and other ongoing qualified costs. On March 17, 2022, DTE Electric closed on the issuance of Securitization bonds of $236 million. Refer to Note 10 to the Consolidated Financial Statements, “Long-Term Debt,” for additional information regarding the terms of the bonds and use of proceeds. Upon closing the transaction, DTE Electric recognized Securitized regulatory assets of $230 million, which were reclassified from existing Regulatory assets for the net book value of the River Rouge plant and tree trimming surge program. Debt service costs relating to tree trimming will be recovered over a period not to exceed 5 years, while amounts relating to River Rouge will be recovered over a period not to exceed 14 years. 2022 Electric Rate Case Filing DTE Electric filed a rate case with the MPSC on January 21, 2022 requesting an increase in base rates of $388 million based on a projected twelve-month period ending October 31, 2023. The requested increase in base rates is primarily due to an increase in net plant resulting from generation and distribution investments, as well as related increases to depreciation and property tax expenses. The rate filing also requested an increase in return on equity from 9.9% to 10.25% and includes projected changes in sales. A final MPSC order in this case is expected in November 2022.

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2022
Earnings Per Share [Abstract]
Earnings Per Share	EARNINGS PER SHARE Basic earnings per share is calculated by dividing net income, adjusted for income allocated to participating securities, by the weighted average number of common shares outstanding during the period. Diluted earnings per share reflect the dilution that would occur if any potentially dilutive instruments were exercised or converted into common shares. DTE Energy’s participating securities are restricted shares under the stock incentive program that contain rights to receive non-forfeitable dividends. Equity units and performance shares do not receive cash dividends; as such, these awards are not considered participating securities. The following is a reconciliation of DTE Energy's basic and diluted income per share calculation: Three Months Ended March 31, 2022 2021 (In millions, except per share amounts) Basic Earnings per Share Net Income Attributable to DTE Energy Company — continuing operations $ 394 $ 320 Less: Allocation of earnings to net restricted stock awards 1 — $ 393 $ 320 Net Income Attributable to DTE Energy Company — discontinued operations — 77 Net income available to common shareholders — basic $ 393 $ 397 Average number of common shares outstanding — basic 193 194 Income from continuing operations $ 2.03 $ 1.65 Income from discontinued operations — 0.40 Basic Earnings per Common Share $ 2.03 $ 2.05 Diluted Earnings per Share Net Income Attributable to DTE Energy Company — continuing operations $ 394 $ 320 Less: Allocation of earnings to net restricted stock awards 1 — $ 393 $ 320 Net Income Attributable to DTE Energy Company — discontinued operations — 77 Net income available to common shareholders — diluted $ 393 $ 397 Average number of common shares outstanding — basic 193 194 Average dilutive equity units and performance share awards 1 — Average number of common shares outstanding — diluted 194 194 Income from continuing operations $ 2.03 $ 1.65 Income from discontinued operations — 0.40 Diluted Earnings per Common Share (a) $ 2.03 $ 2.05 _______________________________________ (a) Equity units excluded from the calculation of diluted EPS were approximately 10.7 million and 10.3 million for the three months ended March 31, 2022 and 2021, respectively, as the dilutive stock price threshold was not met.

Fair Value

Fair Value	3 Months Ended
	Mar. 31, 2022
Fair Value Disclosures [Abstract]
Fair Value	FAIR VALUE Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date in a principal or most advantageous market. Fair value is a market-based measurement that is determined based on inputs, which refer broadly to assumptions that market participants use in pricing assets or liabilities. These inputs can be readily observable, market corroborated, or generally unobservable inputs. The Registrants make certain assumptions they believe that market participants would use in pricing assets or liabilities, including assumptions about risk, and the risks inherent in the inputs to valuation techniques. Credit risk of the Registrants and their counterparties is incorporated in the valuation of assets and liabilities through the use of credit reserves, the impact of which was immaterial at March 31, 2022 and December 31, 2021. The Registrants believe they use valuation techniques that maximize the use of observable market-based inputs and minimize the use of unobservable inputs. A fair value hierarchy has been established that prioritizes the inputs to valuation techniques used to measure fair value in three broad levels. The fair value hierarchy gives the highest priority to quoted prices (unadjusted) in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). In some cases, the inputs used to measure fair value might fall in different levels of the fair value hierarchy. All assets and liabilities are required to be classified in their entirety based on the lowest level of input that is significant to the fair value measurement in its entirety. Assessing the significance of a particular input may require judgment considering factors specific to the asset or liability and may affect the valuation of the asset or liability and its placement within the fair value hierarchy. The Registrants classify fair value balances based on the fair value hierarchy defined as follows: • Level 1 — Consists of unadjusted quoted prices in active markets for identical assets or liabilities that the Registrants have the ability to access as of the reporting date. • Level 2 — Consists of inputs other than quoted prices included within Level 1 that are directly observable for the asset or liability or indirectly observable through corroboration with observable market data. • Level 3 — Consists of unobservable inputs for assets or liabilities whose fair value is estimated based on internally developed models or methodologies using inputs that are generally less readily observable and supported by little, if any, market activity at the measurement date. Unobservable inputs are developed based on the best available information and subject to cost-benefit constraints. The following table presents assets and liabilities for DTE Energy measured and recorded at fair value on a recurring basis: March 31, 2022 December 31, 2021 Level Level Level Other (a) Netting (b) Net Balance Level Level Level Other (a) Netting (b) Net Balance (In millions) Assets Cash equivalents (c) $ 123 $ — $ — $ — $ — $ 123 $ 4 $ — $ — $ — $ — $ 4 Nuclear decommissioning trusts Equity securities 851 — — 182 — 1,033 917 — — 190 — 1,107 Fixed income securities 112 398 — 99 — 609 124 418 — 102 — 644 Private equity and other — — — 236 — 236 — — — 205 — 205 Hedge funds and similar investments 65 30 — — — 95 58 18 — — — 76 Cash equivalents 37 — — — — 37 39 — — — — 39 Other investments (d) Equity securities 65 — — — — 65 68 — — — — 68 Fixed income securities 7 — — — — 7 7 — — — — 7 Cash equivalents 71 — — — — 71 86 — — — — 86 Derivative assets Commodity contracts (e) Natural gas 505 135 71 — (679) 32 273 115 66 — (394) 60 Electricity — 1,006 328 — (905) 429 — 500 143 — (441) 202 Environmental & Other — 325 7 — (327) 5 — 285 9 — (285) 9 Total derivative assets 505 1,466 406 — (1,911) 466 273 900 218 — (1,120) 271 Total $ 1,836 $ 1,894 $ 406 $ 517 $ (1,911) $ 2,742 $ 1,576 $ 1,336 $ 218 $ 497 $ (1,120) $ 2,507 Liabilities Derivative liabilities Commodity contracts (e) Natural gas $ (232) $ (372) $ (301) $ — $ 553 $ (352) $ (177) $ (172) $ (245) $ — $ 347 $ (247) Electricity — (880) (445) — 950 (375) — (434) (188) — 443 (179) Environmental & Other — (325) (1) — 326 — — (288) — — 288 — Foreign currency exchange contracts — (6) — — — (6) — (4) — — (4) Total $ (232) $ (1,583) $ (747) $ — $ 1,829 $ (733) $ (177) $ (898) $ (433) $ — $ 1,078 $ (430) Net Assets (Liabilities) at end of period $ 1,604 $ 311 $ (341) $ 517 $ (82) $ 2,009 $ 1,399 $ 438 $ (215) $ 497 $ (42) $ 2,077 Assets Current $ 532 $ 1,128 $ 339 $ — $ (1,524) $ 475 $ 227 $ 646 $ 166 $ — $ (854) $ 185 Noncurrent 1,304 766 67 517 (387) 2,267 1,349 690 52 497 (266) 2,322 Total Assets $ 1,836 $ 1,894 $ 406 $ 517 $ (1,911) $ 2,742 $ 1,576 $ 1,336 $ 218 $ 497 $ (1,120) $ 2,507 Liabilities Current $ (218) $ (1,165) $ (485) $ — $ 1,415 $ (453) $ (168) $ (609) $ (260) $ — $ 799 $ (238) Noncurrent (14) (418) (262) — 414 (280) (9) (289) (173) — 279 (192) Total Liabilities $ (232) $ (1,583) $ (747) $ — $ 1,829 $ (733) $ (177) $ (898) $ (433) $ — $ 1,078 $ (430) Net Assets (Liabilities) at end of period $ 1,604 $ 311 $ (341) $ 517 $ (82) $ 2,009 $ 1,399 $ 438 $ (215) $ 497 $ (42) $ 2,077 _______________________________________ (a) Amounts represent assets valued at NAV as a practical expedient for fair value. (b) Amounts represent the impact of master netting agreements that allow DTE Energy to net gain and loss positions and cash collateral held or placed with the same counterparties. (c) Amounts consisted of $3 million and $1 million of cash equivalents included in Restricted cash on DTE Energy's Consolidated Statements of Financial Position at March 31, 2022 and December 31, 2021, respectively. All other amounts are included in Cash and cash equivalents on DTE Energy's Consolidated Statements of Financial Position. (d) Excludes cash surrender value of life insurance investments. (e) For contracts with a clearing agent, DTE Energy nets all activity across commodities. This can result in some individual commodities having a contra balance. The following table presents assets for DTE Electric measured and recorded at fair value on a recurring basis as of: March 31, 2022 December 31, 2021 Level 1 Level 2 Level 3 Other (a) Net Balance Level 1 Level 2 Level 3 Other (a) Net Balance (In millions) Assets Cash equivalents (b) $ 38 $ — $ — $ — $ 38 $ — $ — $ — $ — $ — Nuclear decommissioning trusts Equity securities 851 — — 182 1,033 917 — — 190 1,107 Fixed income securities 112 398 — 99 609 124 418 — 102 644 Private equity and other — — — 236 236 — — — 205 205 Hedge funds and similar investments 65 30 — — 95 58 18 — — 76 Cash equivalents 37 — — — 37 39 — — — 39 Other investments Equity securities 20 — — — 20 20 — — — 20 Cash equivalents 11 — — — 11 11 — — — 11 Derivative assets — FTRs — — 3 — 3 — — 9 — 9 Total $ 1,134 $ 428 $ 3 $ 517 $ 2,082 $ 1,169 $ 436 $ 9 $ 497 $ 2,111 Assets Current $ 38 $ — $ 3 $ — $ 41 $ — $ — $ 9 $ — $ 9 Noncurrent 1,096 428 — 517 2,041 1,169 436 — 497 2,102 Total Assets $ 1,134 $ 428 $ 3 $ 517 $ 2,082 $ 1,169 $ 436 $ 9 $ 497 $ 2,111 _______________________________________ (a) Amounts represent assets valued at NAV as a practical expedient for fair value. (b) Amounts consisted of $1 million of cash equivalents included in Restricted cash on DTE Electric's Consolidated Statements of Financial Position at March 31, 2022. All other amounts are included in Cash and cash equivalents on DTE Electric's Consolidated Statements of Financial Position. Cash Equivalents Cash equivalents include investments with maturities of three months or less when purchased. The cash equivalents shown in the fair value table are comprised of short-term investments and money market funds. Nuclear Decommissioning Trusts and Other Investments The nuclear decommissioning trusts and other investments hold debt and equity securities directly and indirectly through commingled funds. Exchange-traded debt and equity securities held directly, as well as publicly-traded commingled funds, are valued using quoted market prices in actively traded markets. Non-exchange traded fixed income securities are valued based upon quotations available from brokers or pricing services. Non-publicly traded commingled funds holding exchange-traded equity or debt securities are valued based on stated NAVs. There are no significant restrictions for these funds and investments may be redeemed with 7 to 65 days notice depending on the fund. There is no intention to sell the investment in these commingled funds. Private equity and other assets include a diversified group of funds that are classified as NAV assets. These funds primarily invest in limited partnerships, including private equity, private real estate and private credit. Distributions are received through the liquidation of the underlying fund assets over the life of the funds. There are generally no redemption rights. The limited partner must hold the fund for its life or find a third-party buyer, which may need to be approved by the general partner. The funds are established with varied contractual durations generally in the range of 7 years to 12 years. The fund life can often be extended by several years by the general partner, and further extended with the approval of the limited partners. Unfunded commitments related to these investments totaled $192 million and $199 million as of March 31, 2022 and December 31, 2021, respectively. Hedge funds and similar investments utilize a diversified group of strategies that attempt to capture uncorrelated sources of return. These investments include publicly traded mutual funds that are valued using quoted prices in actively traded markets, as well as insurance-linked and asset-backed securities that are valued using quotations from broker or pricing services. For pricing the nuclear decommissioning trusts and other investments, a primary price source is identified by asset type, class, or issue for each security. The trustee monitors prices supplied by pricing services and may use a supplemental price source or change the primary source of a given security if the trustee determines that another price source is considered preferable. The Registrants have obtained an understanding of how these prices are derived, including the nature and observability of the inputs used in deriving such prices. Derivative Assets and Liabilities Derivative assets and liabilities are comprised of physical and financial derivative contracts, including futures, forwards, options, and swaps that are both exchange-traded and over-the-counter traded contracts. Various inputs are used to value derivatives depending on the type of contract and availability of market data. Exchange-traded derivative contracts are valued using quoted prices in active markets. The Registrants consider the following criteria in determining whether a market is considered active: frequency in which pricing information is updated, variability in pricing between sources or over time, and the availability of public information. Other derivative contracts are valued based upon a variety of inputs including commodity market prices, broker quotes, interest rates, credit ratings, default rates, market-based seasonality, and basis differential factors. The Registrants monitor the prices that are supplied by brokers and pricing services and may use a supplemental price source or change the primary price source of an index if prices become unavailable or another price source is determined to be more representative of fair value. The Registrants have obtained an understanding of how these prices are derived. Additionally, the Registrants selectively corroborate the fair value of their transactions by comparison of market-based price sources. Mathematical valuation models are used for derivatives for which external market data is not readily observable, such as contracts which extend beyond the actively traded reporting period. The Registrants have established a Risk Management Committee whose responsibilities include directly or indirectly ensuring all valuation methods are applied in accordance with predefined policies. The development and maintenance of the Registrants' forward price curves has been assigned to DTE Energy's Risk Management Department, which is separate and distinct from the trading functions within DTE Energy. The following table presents the fair value reconciliation of Level 3 assets and liabilities measured at fair value on a recurring basis for DTE Energy: Three Months Ended March 31, 2022 Three Months Ended March 31, 2021 Natural Gas Electricity Other Total Natural Gas Electricity Other Total (In millions) Net Assets (Liabilities) as of December 31 $ (179) $ (45) $ 9 $ (215) $ (16) $ 10 $ 4 $ (2) Transfers from Level 3 into Level 2 5 — — 5 — — — — Total gains (losses) Included in earnings (a) (171) (50) 3 (218) (67) 26 — (41) Recorded in Regulatory liabilities — — (4) (4) — — (1) (1) Purchases, issuances, and settlements Settlements 115 (22) (2) 91 (6) (55) (2) (63) Net Assets (Liabilities) as of March 31 $ (230) $ (117) $ 6 $ (341) $ (89) $ (19) $ 1 $ (107) Total gains (losses) included in Net Income attributed to the change in unrealized gains (losses) related to assets and liabilities held at March 31 (a) $ (129) $ (64) $ 3 $ (190) $ (93) $ (7) $ — $ (100) _______________________________________ (a) Amounts are reflected in Operating Revenues — Non-utility operations and Fuel, purchased power, gas, and other — non-utility in DTE Energy's Consolidated Statements of Operations. The following table presents the fair value reconciliation of Level 3 assets and liabilities measured at fair value on a recurring basis for DTE Electric: Three Months Ended March 31, 2022 2021 (In millions) Net Assets as of beginning of period $ 9 $ 4 Total losses recorded in Regulatory liabilities (4) (1) Purchases, issuances, and settlements Settlements (2) (2) Net Assets as of March 31 $ 3 $ 1 Derivatives are transferred between levels primarily due to changes in the source data used to construct price curves as a result of changes in market liquidity. Transfers in and transfers out are reflected as if they had occurred at the beginning of the period. There were no transfers from or into Level 3 for DTE Electric during the three months ended March 31, 2022 and 2021. The following tables present the unobservable inputs related to DTE Energy's Level 3 assets and liabilities: March 31, 2022 Commodity Contracts Derivative Assets Derivative Liabilities Valuation Techniques Unobservable Input Range Weighted Average (In millions) Natural Gas $ 71 $ (301) Discounted Cash Flow Forward basis price (per MMBtu) $ (1.54) — $ 6.46 /MMBtu $ (0.10) /MMBtu Electricity $ 328 $ (445) Discounted Cash Flow Forward basis price (per MWh) $ (12) — $ 8 /MWh $ (2) /MWh December 31, 2021 Commodity Contracts Derivative Assets Derivative Liabilities Valuation Techniques Unobservable Input Range Weighted Average (In millions) Natural Gas $ 66 $ (245) Discounted Cash Flow Forward basis price (per MMBtu) $ (1.36) — $ 3.82 /MMBtu $ (0.04) /MMBtu Electricity $ 143 $ (188) Discounted Cash Flow Forward basis price (per MWh) $ (12) — $ 7 /MWh $ (2) /MWh The unobservable inputs used in the fair value measurement of the electricity and natural gas commodity types consist of inputs that are less observable due in part to lack of available broker quotes, supported by little, if any, market activity at the measurement date or are based on internally developed models. Certain basis prices (i.e., the difference in pricing between two locations) included in the valuation of natural gas and electricity contracts were deemed unobservable. The weighted average price for unobservable inputs was calculated using the average of forward price curves for natural gas and electricity and the absolute value of monthly volumes. The inputs listed above would have had a direct impact on the fair values of the above security types if they were adjusted. A significant increase (decrease) in the basis price would have resulted in a higher (lower) fair value for long positions, with offsetting impacts to short positions. Fair Value of Financial Instruments The following table presents the carrying amount and fair value of financial instruments for DTE Energy: March 31, 2022 December 31, 2021 Carrying Fair Value Carrying Fair Value Amount Level 1 Level 2 Level 3 Amount Level 1 Level 2 Level 3 (In millions) Notes receivable (a) , excluding lessor finance leases $ 127 $ — $ — $ 140 $ 150 $ — $ — $ 167 Short-term borrowings $ 244 $ — $ 244 $ — $ 758 $ — $ 758 $ — Notes payable (b) $ 17 $ — $ — $ 17 $ 27 $ — $ — $ 27 Long-term debt (c) $ 18,249 $ 2,247 $ 15,029 $ 1,163 $ 17,378 $ 2,284 $ 15,425 $ 1,207 _______________________________________ (a) Current portion included in Current Assets — Other on DTE Energy's Consolidated Statements of Financial Position. (b) Included in Current Liabilities — Other and Other Liabilities — Other on DTE Energy's Consolidated Statements of Financial Position. (c) Includes debt due within one year and excludes finance lease obligations. Carrying value also includes unamortized debt discounts and issuance costs. The following table presents the carrying amount and fair value of financial instruments for DTE Electric: March 31, 2022 December 31, 2021 Carrying Fair Value Carrying Fair Value Amount Level 1 Level 2 Level 3 Amount Level 1 Level 2 Level 3 (In millions) Notes receivable (a) $ 17 $ — $ — $ 17 $ 17 $ — $ — $ 17 Short-term borrowings — affiliates $ — $ — $ — $ — $ 53 $ — $ — $ 53 Short-term borrowings — other $ — $ — $ — $ — $ 153 $ — $ 153 $ — Notes payable (b) $ 17 $ — $ — $ 17 $ 27 $ — $ — $ 27 Long-term debt (c) $ 9,775 $ — $ 9,824 $ 169 $ 8,907 $ — $ 9,898 $ 150 _______________________________________ (a) Included in Current Assets — Other on DTE Electric's Consolidated Statements of Financial Position. (b) Included in Current Liabilities — Other and Other Liabilities — Other on DTE Electric's Consolidated Statements of Financial Position. (c) Includes debt due within one year and excludes finance lease obligations. Carrying value also includes unamortized debt discounts and issuance costs. For further fair value information on financial and derivative instruments, see Note 9 to the Consolidated Financial Statements, "Financial and Other Derivative Instruments." Nuclear Decommissioning Trust Funds DTE Electric has a legal obligation to decommission its nuclear power plants following the expiration of its operating licenses. This obligation is reflected as an Asset retirement obligation on DTE Electric's Consolidated Statements of Financial Position. Rates approved by the MPSC provide for the recovery of decommissioning costs of Fermi 2 and the disposal of low-level radioactive waste. The following table summarizes DTE Electric's fair value of the nuclear decommissioning trust fund assets: March 31, 2022 December 31, 2021 (In millions) Fermi 2 $ 1,990 $ 2,051 Fermi 1 3 3 Low-level radioactive waste 17 17 $ 2,010 $ 2,071 The costs of securities sold are determined on the basis of specific identification. The following table sets forth DTE Electric's gains and losses and proceeds from the sale of securities by the nuclear decommissioning trust funds: Three Months Ended March 31, 2022 2021 (In millions) Realized gains $ 14 $ 24 Realized losses $ (5) $ (2) Proceeds from sale of securities $ 207 $ 271 Realized gains and losses from the sale of securities and unrealized gains and losses incurred by the Fermi 2 trust are recorded to Regulatory assets and the Nuclear decommissioning liability. Realized gains and losses from the sale of securities and unrealized gains and losses on the low-level radioactive waste funds are recorded to the Nuclear decommissioning liability. The following table sets forth DTE Electric's fair value and unrealized gains and losses for the nuclear decommissioning trust funds: March 31, 2022 December 31, 2021 Fair Unrealized Unrealized Fair Unrealized Unrealized (In millions) Equity securities $ 1,033 $ 488 $ (13) $ 1,107 $ 546 $ (9) Fixed income securities 609 11 (30) 644 23 (6) Private equity and other 236 70 (2) 205 58 (8) Hedge funds and similar investments 95 1 (4) 76 1 (2) Cash equivalents 37 — — 39 — — $ 2,010 $ 570 $ (49) $ 2,071 $ 628 $ (25) The following table summarizes the fair value of the fixed income securities held in nuclear decommissioning trust funds by contractual maturity: March 31, 2022 (In millions) Due within one year $ 20 Due after one through five years 127 Due after five through ten years 98 Due after ten years 265 $ 510 Fixed income securities held in nuclear decommissioning trust funds include $99 million of non-publicly traded commingled funds that do not have a contractual maturity date. Other Securities At March 31, 2022 and December 31, 2021, the Registrants' securities included in Other investments on the Consolidated Statements of Financial Position were comprised primarily of investments within DTE Energy's rabbi trust. The rabbi trust was established to fund certain non-qualified pension benefits, and therefore changes in market value are recognized in earnings. Gains and losses are allocated from DTE Energy to DTE Electric and are included in Other Income or Other Expense, respectively, in the Registrants' Consolidated Statements of Operations. The following table summarizes the Registrant's gains (losses) related to the trust: Three Months Ended March 31, 2022 2021 (In millions) Gains (losses) related to equity securities $ (1) $ 2 Gains (losses) related to fixed income securities — — $ (1) $ 2

Financial and Other Derivative

Financial and Other Derivative Instruments	3 Months Ended
	Mar. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Financial and Other Derivative Instruments	FINANCIAL AND OTHER DERIVATIVE INSTRUMENTS The Registrants recognize all derivatives at their fair value as Derivative assets or liabilities on their respective Consolidated Statements of Financial Position unless they qualify for certain scope exceptions, including the normal purchases and normal sales exception. Further, derivatives that qualify and are designated for hedge accounting are classified as either hedges of a forecasted transaction or the variability of cash flows to be received or paid related to a recognized asset or liability (cash flow hedge); or as hedges of the fair value of a recognized asset or liability or of an unrecognized firm commitment (fair value hedge). For cash flow hedges, the derivative gain or loss is deferred in Accumulated other comprehensive income (loss) and later reclassified into earnings when the underlying transaction occurs. For fair value hedges, changes in fair values for the derivative and hedged item are recognized in earnings each period. For derivatives that do not qualify or are not designated for hedge accounting, changes in fair value are recognized in earnings each period. The Registrants' primary market risk exposure is associated with commodity prices, credit, and interest rates. The Registrants have risk management policies to monitor and manage market risks. The Registrants use derivative instruments to manage some of the exposure. DTE Energy uses derivative instruments for trading purposes in its Energy Trading segment. Contracts classified as derivative instruments include electricity, natural gas, oil, certain environmental contracts, forwards, futures, options, swaps, and foreign currency exchange contracts. Items not classified as derivatives include natural gas and environmental inventory, pipeline transportation contracts, certain environmental contracts, and natural gas storage assets. DTE Electric — DTE Electric generates, purchases, distributes, and sells electricity. DTE Electric uses forward contracts to manage changes in the price of electricity and fuel. Substantially all of these contracts meet the normal purchases and normal sales exception and are therefore accounted for under the accrual method. Other derivative contracts are MTM and recoverable through the PSCR mechanism when settled. This results in the deferral of unrealized gains and losses as Regulatory assets or liabilities until realized. DTE Gas — DTE Gas purchases, stores, transports, distributes, and sells natural gas, and buys and sells transportation and storage capacity. DTE Gas has fixed-priced contracts for portions of its expected natural gas supply requirements through March 2025. Substantially all of these contracts meet the normal purchases and normal sales exception and are therefore accounted for under the accrual method. Forward transportation and storage contracts are generally not derivatives and are therefore accounted for under the accrual method. DTE Vantage — This segment manages and operates renewable gas recovery projects, industrial energy projects, and power generation assets. Long-term contracts and hedging instruments are used in the marketing and management of the segment assets. These contracts and hedging instruments are generally not derivatives and are therefore accounted for under the accrual method. Energy Trading — Commodity Price Risk — Energy Trading markets and trades electricity, natural gas physical products, and energy financial instruments, and provides energy and asset management services utilizing energy commodity derivative instruments. Forwards, futures, options, and swap agreements are used to manage exposure to the risk of market price and volume fluctuations in its operations. These derivatives are accounted for by recording changes in fair value to earnings unless hedge accounting criteria are met. Energy Trading — Foreign Currency Exchange Risk — Energy Trading has foreign currency exchange forward contracts to economically hedge fixed Canadian dollar commitments existing under natural gas and power purchase and sale contracts and natural gas transportation contracts. Energy Trading enters into these contracts to mitigate price volatility with respect to fluctuations of the Canadian dollar relative to the U.S. dollar. These derivatives are accounted for by recording changes in fair value to earnings unless hedge accounting criteria are met. Corporate and Other — Interest Rate Risk — DTE Energy may use interest rate swaps, treasury locks, and other derivatives to hedge the risk associated with interest rate market volatility. Credit Risk — DTE Energy maintains credit policies that significantly minimize overall credit risk. These policies include an evaluation of potential customers’ and counterparties’ financial condition, including the viability of underlying productive assets, credit rating, collateral requirements, or other credit enhancements such as letters of credit or guarantees. DTE Energy generally uses standardized agreements that allow the netting of positive and negative transactions associated with a single counterparty. DTE Energy maintains a provision for credit losses based on factors surrounding the credit risk of its customers, historical trends, and other information. Based on DTE Energy's credit policies and its March 31, 2022 provision for credit losses, DTE Energy’s exposure to counterparty nonperformance is not expected to have a material adverse effect on DTE Energy's Consolidated Financial Statements. Derivative Activities DTE Energy manages its MTM risk on a portfolio basis based upon the delivery period of its contracts and the individual components of the risks within each contract. Accordingly, it records and manages the energy purchase and sale obligations under its contracts in separate components based on the commodity (e.g. electricity or natural gas), the product (e.g. electricity for delivery during peak or off-peak hours), the delivery location (e.g. by region), the risk profile (e.g. forward or option), and the delivery period (e.g. by month and year). The following describes the categories of activities represented by their operating characteristics and key risks: • Asset Optimization — Represents derivative activity associated with assets owned and contracted by DTE Energy, including forward natural gas purchases and sales, natural gas transportation, and storage capacity. Changes in the value of derivatives in this category typically economically offset changes in the value of underlying non-derivative positions, which do not qualify for fair value accounting. The difference in accounting treatment of derivatives in this category and the underlying non-derivative positions can result in significant earnings volatility. • Marketing and Origination — Represents derivative activity transacted by originating substantially hedged positions with wholesale energy marketers, producers, end-users, utilities, retail aggregators, and alternative energy suppliers. • Fundamentals Based Trading — Represents derivative activity transacted with the intent of taking a view, capturing market price changes, or putting capital at risk. This activity is speculative in nature as opposed to hedging an existing exposure. • Other — Includes derivative activity at DTE Electric related to FTRs. Changes in the value of derivative contracts at DTE Electric are recorded as Derivative assets or liabilities, with an offset to Regulatory assets or liabilities as the settlement value of these contracts will be included in the PSCR mechanism when realized. The following table presents the fair value of derivative instruments for DTE Energy: March 31, 2022 December 31, 2021 Derivative Derivative Liabilities Derivative Derivative Liabilities (In millions) Derivatives designated as hedging instruments Foreign currency exchange contracts $ — $ (4) $ — $ (4) Derivatives not designated as hedging instruments Commodity contracts Natural gas $ 711 $ (905) $ 454 $ (594) Electricity 1,334 (1,325) 643 (622) Environmental & Other 332 (326) 294 (288) Foreign currency exchange contracts — (2) — — Total derivatives not designated as hedging instruments $ 2,377 $ (2,558) $ 1,391 $ (1,504) Current $ 1,876 $ (1,868) $ 1,035 $ (1,037) Noncurrent 501 (694) 356 (471) Total derivatives $ 2,377 $ (2,562) $ 1,391 $ (1,508) The fair value of derivative instruments at DTE Electric was $3 million and $9 million at March 31, 2022 and December 31, 2021, respectively, comprised of FTRs recorded to Other current assets on the Consolidated Statements of Financial Position and not designated as hedging instruments. Certain of DTE Energy's derivative positions are subject to netting arrangements which provide for offsetting of asset and liability positions as well as related cash collateral. Such netting arrangements generally do not have restrictions. Under such netting arrangements, DTE Energy offsets the fair value of derivative instruments with cash collateral received or paid for those contracts executed with the same counterparty, which reduces DTE Energy's Total Assets and Liabilities. Cash collateral is allocated between the fair value of derivative instruments and customer accounts receivable and payable with the same counterparty on a pro-rata basis to the extent there is exposure. Any cash collateral remaining, after the exposure is netted to zero, is reflected in Accounts receivable and Accounts payable as collateral paid or received, respectively. DTE Energy also provides and receives collateral in the form of letters of credit which can be offset against net Derivative assets and liabilities as well as Accounts receivable and payable. DTE Energy had issued letters of credit of $13 million and $18 million outstanding at March 31, 2022 and December 31, 2021, respectively, which could be used to offset net Derivative liabilities. Letters of credit received from third parties which could be used to offset net Derivative assets were $45 million and $37 million at March 31, 2022 and December 31, 2021, respectively. Such balances of letters of credit are excluded from the tables below and are not netted with the recognized assets and liabilities in DTE Energy's Consolidated Statements of Financial Position. For contracts with certain clearing agents, the fair value of derivative instruments is netted against realized positions with the net balance reflected as either 1) a Derivative asset or liability or 2) an Account receivable or payable. Other than certain clearing agents, Accounts receivable and Accounts payable that are subject to netting arrangements have not been offset against the fair value of Derivative assets and liabilities. The following table presents net cash collateral offsetting arrangements for DTE Energy: March 31, 2022 December 31, 2021 (In millions) Cash collateral netted against Derivative assets $ (225) $ (90) Cash collateral netted against Derivative liabilities 143 48 Cash collateral recorded in Accounts receivable (a) 36 55 Cash collateral recorded in Accounts payable (a) (16) (21) Total net cash collateral posted (received) $ (62) $ (8) _______________________________________ (a) Amounts are recorded net by counterparty. The following table presents the netting offsets of Derivative assets and liabilities for DTE Energy: March 31, 2022 December 31, 2021 Gross Amounts of Recognized Assets (Liabilities) Gross Amounts Offset in the Consolidated Statements of Financial Position Net Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position Gross Amounts of Recognized Assets (Liabilities) Gross Amounts Offset in the Consolidated Statements of Financial Position Net Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position (In millions) Derivative assets Commodity contracts Natural gas $ 711 $ (679) $ 32 $ 454 $ (394) $ 60 Electricity 1,334 (905) 429 643 (441) 202 Environmental & Other 332 (327) 5 294 (285) 9 Total derivative assets $ 2,377 $ (1,911) $ 466 $ 1,391 $ (1,120) $ 271 Derivative liabilities Commodity contracts Natural gas $ (905) $ 553 $ (352) $ (594) $ 347 $ (247) Electricity (1,325) 950 (375) (622) 443 (179) Environmental & Other (326) 326 — (288) 288 — Foreign currency exchange contracts (6) — (6) (4) — (4) Total derivative liabilities $ (2,562) $ 1,829 $ (733) $ (1,508) $ 1,078 $ (430) The following table presents the netting offsets of Derivative assets and liabilities showing the reconciliation of derivative instruments to DTE Energy's Consolidated Statements of Financial Position: March 31, 2022 December 31, 2021 Derivative Assets Derivative Liabilities Derivative Assets Derivative Liabilities Current Noncurrent Current Noncurrent Current Noncurrent Current Noncurrent (In millions) Total fair value of derivatives $ 1,876 $ 501 $ (1,868) $ (694) $ 1,035 $ 356 $ (1,037) $ (471) Counterparty netting (1,335) (351) 1,335 351 (791) (239) 791 239 Collateral adjustment (189) (36) 80 63 (63) (27) 8 40 Total derivatives as reported $ 352 $ 114 $ (453) $ (280) $ 181 $ 90 $ (238) $ (192) The effect of derivatives not designated as hedging instruments on DTE Energy's Consolidated Statements of Operations is as follows: Location of Gain (Loss) Recognized in Income on Derivatives Gain (Loss) Recognized in Income on Derivatives for the Three Months Ended March 31, 2022 2021 (In millions) Commodity contracts Natural gas Operating Revenues — Non-utility operations $ (231) $ (43) Natural gas Fuel, purchased power, gas, and other — non-utility 65 (55) Electricity Operating Revenues — Non-utility operations 2 33 Environmental & Other Operating Revenues — Non-utility operations (4) (32) Foreign currency exchange contracts Operating Revenues — Non-utility operations (2) (2) Total $ (170) $ (99) Revenues and energy costs related to trading contracts are presented on a net basis in DTE Energy's Consolidated Statements of Operations. Commodity derivatives used for trading purposes, and financial non-trading commodity derivatives, are accounted for using the MTM method with unrealized and realized gains and losses recorded in Operating Revenues — Non-utility operations. Non-trading physical commodity sale and purchase derivative contracts are generally accounted for using the MTM method with unrealized and realized gains and losses for sales recorded in Operating Revenues — Non-utility operations and purchases recorded in Fuel, purchased power, gas, and other — non-utility. The following represents the cumulative gross volume of DTE Energy's derivative contracts outstanding as of March 31, 2022: Commodity Number of Units Natural gas (MMBtu) 2,174,656,330 Electricity (MWh) 38,329,637 Oil (Gallons) 10,428,000 Foreign currency exchange ($ CAD) 116,900,803 Renewable Energy Certificates (MWh) 9,346,692 Carbon emissions (Metric Tons) 1,355,694 Various subsidiaries of DTE Energy have entered into contracts which contain ratings triggers and are guaranteed by DTE Energy. These contracts contain provisions which allow the counterparties to require that DTE Energy post cash or letters of credit as collateral in the event that DTE Energy’s credit rating is downgraded below investment grade. Certain of these provisions (known as "hard triggers") state specific circumstances under which DTE Energy can be required to post collateral upon the occurrence of a credit downgrade, while other provisions (known as "soft triggers") are not as specific. For contracts with soft triggers, it is difficult to estimate the amount of collateral which may be requested by counterparties and/or which DTE Energy may ultimately be required to post. The amount of such collateral which could be requested fluctuates based on commodity prices (primarily natural gas, power, environmental, and coal) and the provisions and maturities of the underlying transactions. As of March 31, 2022, DTE Energy's contractual obligation to post collateral in the form of cash or letters of credit in the event of a downgrade to below investment grade, under both hard trigger and soft trigger provisions, was $813 million. As of March 31, 2022, DTE Energy had $2.2 billion of derivatives in net liability positions, for which hard triggers exist. There is $26 million of collateral that has been posted against such liabilities, including cash and letters of credit. Associated derivative net asset positions for which contractual offset exists were $1.7 billion. The net remaining amount of $510 million is derived from the $813 million noted above.

Long-Term Debt

Long-Term Debt	3 Months Ended
	Mar. 31, 2022
Debt Disclosure [Abstract]
Long-Term Debt	LONG-TERM DEBT Debt Issuances In 2022, the following debt was issued: Company Month Type Interest Rate Maturity Date Amount (In millions) DTE Electric February Mortgage bonds (a) 3.00% 2032 $ 500 DTE Electric February Mortgage bonds (b) 3.65% 2052 400 DTE Electric March Securitization bonds (c) 2.64% 2027 (d) 184 DTE Electric March Securitization bonds (c) 3.11% 2036 (e) 52 $ 1,136 _______________________________________ (a) Proceeds used for the repayment of short-term borrowings, for capital expenditures, and for other general corporate purposes. (b) Bonds were issued as Green Bonds with proceeds to be used for eligible green expenditures, including costs related to the generation of solar and wind energy, purchases of renewable energy from wind and solar power facilities, and energy optimization programs. (c) Proceeds were used to reimburse DTE Electric for qualified costs previously incurred, including the net book value of the River Rouge generation plant, tree trimming surge program costs, and other qualified costs. The securitization financing order from the MPSC required that the net proceeds be subsequently applied by DTE Electric to retire existing debt or equity. Accordingly, DTE Electric used proceeds of $115 million towards retirement of the 2012 Series A Mortgage bonds noted in the Debt Redemptions table below and issued a one-time special dividend of $115 million to DTE Energy. Refer to Note 6 to the Consolidated Financial Statements, “Regulatory Matters,” for additional information (d) Principal payments on the bonds will be made semi-annually beginning December 2022, with the final payment scheduled for December 2026. (e) Principal payments on the bonds will be made semi-annually beginning June 2027, with the final payment scheduled for December 2035. Debt Redemptions In 2022, the following debt was redeemed: Company Month Type Interest Rate Maturity Date Amount (In millions) DTE Electric March Mortgage bonds 2.65% 2022 $ 250 $ 250

Short-Term Credit Arrangements

Short-Term Credit Arrangements and Borrowings	3 Months Ended
	Mar. 31, 2022
Short-term Debt [Abstract]
Short-Term Credit Arrangements and Borrowings	SHORT-TERM CREDIT ARRANGEMENTS AND BORROWINGS DTE Energy, DTE Electric, and DTE Gas have unsecured revolving credit agreements that can be used for general corporate borrowings, but are intended to provide liquidity support for each of the companies’ commercial paper programs. Borrowings under the revolvers are available at prevailing short-term interest rates. DTE Energy also has other facilities to support letter of credit issuance. The unsecured revolving credit agreements have historically required DTE Energy, DTE Electric, and DTE Gas to maintain a total funded debt to capitalization ratio of no more than 0.65 to 1. In June 2021, DTE Energy amended its total funded debt to capitalization ratio requirement to no more than 0.70 to 1 starting with the third quarter of 2021 and ending December 2022. The amendment was a result of temporary balance sheet impacts resulting from the separation of DT Midstream on July 1, 2021. In the agreements, "total funded debt" means all indebtedness of each respective company and their consolidated subsidiaries, including finance lease obligations, hedge agreements, and guarantees of third parties’ debt, but excluding contingent obligations, nonrecourse and junior subordinated debt, and certain equity-linked securities and, except for calculations at the end of the second quarter, certain DTE Gas short-term debt. "Capitalization" means the sum of (a) total funded debt plus (b) "consolidated net worth," which is equal to consolidated total equity of each respective company and their consolidated subsidiaries (excluding pension effects under certain FASB statements), as determined in accordance with accounting principles generally accepted in the United States of America. At March 31, 2022, the total funded debt to total capitalization ratios for DTE Energy, DTE Electric, and DTE Gas were 0.67 to 1, 0.53 to 1, and 0.46 to 1, respectively, and were in compliance with this financial covenant. The availability under these facilities as of March 31, 2022 is shown in the following table: DTE Energy DTE Electric DTE Gas Total (In millions) Unsecured revolving credit facility, expiring April 2025 (a) $ 1,500 $ 500 $ 300 $ 2,300 Unsecured term loan (b) 400 — — 400 Unsecured Canadian revolving credit facility, expiring May 2023 88 — — 88 Unsecured letter of credit facility, expiring February 2023 150 — — 150 Unsecured letter of credit facility, expiring July 2023 70 — — 70 Unsecured letter of credit facility (c) 50 — — 50 2,258 500 300 3,058 Amounts outstanding at March 31, 2022 Revolver borrowings 83 — — 83 Commercial paper issuances 161 — — 161 Letters of credit 288 — — 288 532 — — 532 Net availability at March 31, 2022 $ 1,726 $ 500 $ 300 $ 2,526 _______________________________________ (a) Total availability of $102 million expires in April 2024, including $67 million at DTE Energy, $22 million at DTE Electric, and $13 million at DTE Gas. All other availability expires in April 2025. (b) Term loan initially scheduled to expire June 2022 was terminated in April 2022. (c) Uncommitted letter of credit facility with automatic renewal provision for each July and therefore no expiration. In conjunction with maintaining certain exchange-traded risk management positions, DTE Energy may be required to post collateral with its clearing agents. DTE Energy has demand financing agreements with its clearing agents, including an agreement for up to $50 million with an indefinite term and an agreement for up to $150 million currently contracted through 2022 and subject to renewal. The $50 million agreement, as amended, also allows for up to $50 million of additional margin financing provided that DTE Energy posts a letter of credit for the incremental amount. Both agreements allow the right of setoff with posted collateral. At March 31, 2022, the capacity under the facilities was $250 million. The amounts outstanding under the agreements were $58 million and $103 million at March 31, 2022 and December 31, 2021, respectively, and were fully offset by the posted collateral.

Leases

Leases	3 Months Ended
	Mar. 31, 2022
Leases [Abstract]
Leases	LEASES Lessor During the first quarter 2022, DTE Energy completed construction of and began operating certain energy infrastructure assets for a large industrial customer under a long-term agreement, where the assets will transfer to the customer at the end of the contract term in 2040. DTE Energy has accounted for a portion of the agreement as a finance lease arrangement, recognizing an additional net investment of $33 million. The components of DTE Energy’s net investment in finance leases for remaining periods were as follows: DTE Energy March 31, 2022 (In millions) 2022 $ 19 2023 26 2024 27 2025 27 2026 26 2027 and Thereafter 335 Total minimum future lease receipts 460 Residual value of leased pipeline 17 Less unearned income 248 Net investment in finance lease 229 Less current portion 6 $ 223 Interest income recognized under finance leases was $5 million and $4 million for the three months ended March 31, 2022 and 2021, respectively. DTE Energy’s lease income associated with operating leases, including the line items in which it was included on the Consolidated Statements of Operations, was as follows: Three Months Ended March 31, 2022 2021 (In millions) Fixed payments $ 4 $ 14 Variable payments 16 17 $ 20 $ 31 Operating revenues $ 20 $ 21 Other income — 10 $ 20 $ 31
Leases	LEASES Lessor During the first quarter 2022, DTE Energy completed construction of and began operating certain energy infrastructure assets for a large industrial customer under a long-term agreement, where the assets will transfer to the customer at the end of the contract term in 2040. DTE Energy has accounted for a portion of the agreement as a finance lease arrangement, recognizing an additional net investment of $33 million. The components of DTE Energy’s net investment in finance leases for remaining periods were as follows: DTE Energy March 31, 2022 (In millions) 2022 $ 19 2023 26 2024 27 2025 27 2026 26 2027 and Thereafter 335 Total minimum future lease receipts 460 Residual value of leased pipeline 17 Less unearned income 248 Net investment in finance lease 229 Less current portion 6 $ 223 Interest income recognized under finance leases was $5 million and $4 million for the three months ended March 31, 2022 and 2021, respectively. DTE Energy’s lease income associated with operating leases, including the line items in which it was included on the Consolidated Statements of Operations, was as follows: Three Months Ended March 31, 2022 2021 (In millions) Fixed payments $ 4 $ 14 Variable payments 16 17 $ 20 $ 31 Operating revenues $ 20 $ 21 Other income — 10 $ 20 $ 31
Leases	LEASES Lessor During the first quarter 2022, DTE Energy completed construction of and began operating certain energy infrastructure assets for a large industrial customer under a long-term agreement, where the assets will transfer to the customer at the end of the contract term in 2040. DTE Energy has accounted for a portion of the agreement as a finance lease arrangement, recognizing an additional net investment of $33 million. The components of DTE Energy’s net investment in finance leases for remaining periods were as follows: DTE Energy March 31, 2022 (In millions) 2022 $ 19 2023 26 2024 27 2025 27 2026 26 2027 and Thereafter 335 Total minimum future lease receipts 460 Residual value of leased pipeline 17 Less unearned income 248 Net investment in finance lease 229 Less current portion 6 $ 223 Interest income recognized under finance leases was $5 million and $4 million for the three months ended March 31, 2022 and 2021, respectively. DTE Energy’s lease income associated with operating leases, including the line items in which it was included on the Consolidated Statements of Operations, was as follows: Three Months Ended March 31, 2022 2021 (In millions) Fixed payments $ 4 $ 14 Variable payments 16 17 $ 20 $ 31 Operating revenues $ 20 $ 21 Other income — 10 $ 20 $ 31

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Environmental DTE Electric Air — DTE Electric is subject to the EPA ozone and fine particulate transport and acid rain regulations that limit power plant emissions of SO 2 and NO X . The EPA and the State of Michigan have also issued emission reduction regulations relating to ozone, fine particulate, regional haze, mercury, and other air pollution. These rules have led to controls on fossil-fueled power plants to reduce SO 2 , NO X , mercury, and other emissions. Additional rulemakings may occur over the next few years which could require additional controls for SO 2 , NO X , and other hazardous air pollutants. In 2015, the EPA finalized National Ambient Air Quality Standards ("NAAQS") for ground level ozone. In October 2016, the State of Michigan recommended to the EPA which areas of the State are not attaining the standards. In August 2018, the EPA designated southeast Michigan as "marginal non-attainment" with the 2015 ozone NAAQS. In January 2022, after collecting several years of data, the State submitted a request to the EPA for redesignation of the southeast Michigan ozone non-attainment area to attainment, and to accept their maintenance plan and emission inventories as a revision to the Michigan SIP. On March 14, 2022 the EPA published a proposal in the Federal Register to formally redesignate the southeast Michigan ozone non-attainment areas to attainment with the 2015 ozone NAAQS. The redesignation includes a public comment period. Until the proposed redesignation is finalized, DTE Electric cannot predict the financial impact of this proposal. The EPA has implemented regulatory actions under the Clean Air Act to address emissions of GHGs from the utility sector and other sectors of the economy. Among these actions, in 2015 the EPA finalized performance standards for emissions of carbon dioxide from new and existing fossil-fuel fired EGUs. The performance standards for existing EGUs, known as the EPA Clean Power Plan, were challenged by petitioners and stayed by the U.S. Supreme Court in February 2016 pending final review by the courts. On October 10, 2017, the EPA, under a new administration, proposed to rescind the Clean Power Plan, and in August 2018, the EPA proposed revised emission guidelines for GHGs from existing EGUs. On June 19, 2019, the EPA Administrator officially repealed the Clean Power Plan and finalized its replacement, named the ACE rule. The ACE rule was vacated and remanded back to the EPA in a D.C. Circuit Court decision on January 19, 2021. Petitions were filed asking the Supreme Court to review the D.C. Circuit's decision vacating the ACE rule, and the petition was granted in October 2021. A decision from the Supreme Court is expected by June 2022. The next steps taken by the EPA with respect to regulation of GHGs from EGUs is uncertain. In addition to the GHG standards for existing EGUs, in December 2018, the EPA issued proposed revisions to the carbon dioxide performance standards for new, modified, or reconstructed fossil-fuel fired EGUs. The rule was finalized on January 13, 2021 and immediately challenged. An order vacating the rule was filed by the D.C. Circuit Court of Appeals on April 5, 2021. The carbon standards for new sources are not expected to have a material impact on DTE Electric, since DTE Electric has no plans to build new coal-fired generation and any potential new gas generation is expected to be able to comply with the standards. Pending or future legislation or other regulatory actions could have a material impact on DTE Electric's operations and financial position and the rates charged to its customers. Potential impacts include expenditures for environmental equipment beyond what is currently planned, financing costs related to additional capital expenditures, the purchase of emission credits from market sources, higher costs of purchased power, and the retirement of facilities where control equipment is not economical. DTE Electric would seek to recover these incremental costs through increased rates charged to its utility customers, as authorized by the MPSC. To comply with air pollution requirements, DTE Electric has spent approximately $2.4 billion. DTE Electric does not anticipate additional capital expenditures for air pollution requirements, subject to the results of future rulemakings. Water — In response to an EPA regulation, DTE Electric was required to examine alternatives for reducing the environmental impacts of the cooling water intake structures at several of its facilities. A final rule became effective in October 2014, which required studies to be completed and submitted as part of the NPDES permit application process to determine the type of technology needed to reduce impacts to fish. DTE Electric has completed the required studies and submitted reports for most of its generation plants, and a final study is in-process for Monroe power plant. Final compliance for the installation of any required technology to reduce the impacts of water intake structures will be determined by the state on a case by case, site specific basis. DTE Electric is currently evaluating the compliance options and working with the State of Michigan on determining whether any controls are needed. These evaluations/studies may require modifications to some existing intake structures. It is not possible to quantify the impact of this rule making at this time. Contaminated and Other Sites — Prior to the construction of major interstate natural gas pipelines, gas for heating and other uses was manufactured locally from processes involving coal, coke, or oil. The facilities, which produced gas, have been designated as MGP sites. DTE Electric conducted remedial investigations at contaminated sites, including three former MGP sites. Cleanup of one of the MGP sites is complete, and the site is closed. The investigations have revealed contamination related to the by-products of gas manufacturing at each MGP site. In addition to the MGP sites, DTE Electric is also in the process of cleaning up other contaminated sites, including the area surrounding an ash landfill, electrical distribution substations, electric generating power plants, and underground and above ground storage tank locations. The findings of these investigations indicated that the estimated cost to remediate these sites is expected to be incurred over the next several years. At March 31, 2022 and December 31, 2021, DTE Electric had $12 million and $14 million, respectively, accrued for remediation. These costs are not discounted to their present value. Any change in assumptions, such as remediation techniques, nature and extent of contamination, and regulatory requirements, could impact the estimate of remedial action costs for the sites and affect DTE Electric’s financial position and cash flows. DTE Electric believes the likelihood of a material change to the accrued amount is remote based on current knowledge of the conditions at each site. Coal Combustion Residuals and Effluent Limitations Guidelines — A final EPA rule for the disposal of coal combustion residuals, commonly known as coal ash, became effective in October 2015, and was revised in August 2016, July 2018, August 2020, and November 2020. The rule is based on the continued listing of coal ash as a non-hazardous waste and relies on various self-implementation design and performance standards. DTE Electric owns and operates three permitted engineered coal ash storage facilities to dispose of coal ash from coal-fired power plants and operates a number of smaller impoundments at its power plants subject to certain provisions in the CCR rule. At certain facilities, the rule currently requires ongoing sampling and testing of monitoring wells, compliance with groundwater standards, and the closure of basins at the end of the useful life of the associated power plant. On August 28, 2020, the CCR rule "A Holistic Approach to Closure Part A: Deadline to Initiate Closure and Enhancing Public Access to Information" was published in the Federal Register and required all unlined impoundments (including units previously classified as "clay-lined") to initiate closure as soon as technically feasible, but no later than April 11, 2021. Additionally, the rule amends certain reporting requirements and CCR website requirements. On November 12, 2020, an additional revision to the CCR Rule "A Holistic Approach to Closure Part B: Alternate Demonstration for Unlined Surface Impoundments" was published in the Federal Register that provides a process to determine if certain unlined impoundments consist of an alternative liner system that may be as protective as the current liners specified in the CCR rule, and therefore may continue to operate. DTE Electric has submitted applications to the EPA that support continued use of all impoundments through their active lives. The applications are currently under review and the forced closure date of April 11, 2021 is effectively delayed while the EPA completes their review. At the State level, legislation was signed by the Governor in December 2018 and provides for further regulation of the CCR program in Michigan. Additionally, the statutory revision provides the basis of a CCR program that EGLE has submitted to the EPA for approval to fully regulate the CCR program in Michigan in lieu of a Federal permit program. The EPA is currently working with EGLE in reviewing the submitted State program, and DTE Electric will work with EGLE to implement the State program that may be approved in the future. On April 12, 2017, the EPA granted a petition for reconsideration of the 2015 ELG Rule. The EPA also signed an administrative stay of the 2015 ELG Rule’s compliance deadlines for fly ash transport water, bottom ash transport water, and flue gas desulfurization (FGD) wastewater, among others. On June 6, 2017, the EPA published in the Federal Register a proposed rule (Postponement Rule) to postpone certain applicable deadlines within the 2015 ELG rule. The Postponement Rule was published on September 18, 2017. The Postponement Rule nullified the administrative stay but also extended the earliest compliance deadlines for only FGD wastewater and bottom ash transport water until November 1, 2020 in order for the EPA to propose and finalize a new ruling. On October 13, 2020, the EPA finalized the ELG Reconsideration Rule which revised the regulations from the 2015 ELG rule. The Reconsideration Rule re-establishes the technology-based effluent limitations guidelines and standards applicable to FGD wastewater and bottom ash transport water. The EPA set the applicability dates for bottom ash transport water "as soon as possible" beginning October 13, 2021 and no later than December 31, 2025. FGD wastewater retrofits must be completed "as soon as possible" beginning October 13, 2021 and no later than December 31, 2025 or December 31, 2028 if a permittee decides to pursue the Voluntary Incentives Program (VIP) subcategory for FGD wastewater. If a facility applies for the VIP, they must meet more stringent standards, but are allowed an extended time period to complete the project. The Reconsideration Rule also provides additional compliance opportunities by finalizing low utilization and cessation of coal burning subcategories. The Reconsideration Rule provides new opportunities for DTE Electric to evaluate existing ELG compliance strategies and make any necessary adjustments to ensure full compliance with the ELGs in a cost-effective manner. Compliance schedules for individual facilities and individual waste streams are determined through issuance of new NPDES permits by the State of Michigan. The State of Michigan has issued an NPDES permit for the Belle River power plant establishing compliance deadlines based on the 2020 Reconsideration Rule. On October 11, 2021, in consideration of the deadlines above, DTE Electric submitted the appropriate documentation titled the Notice of Planned Participation (NOPP) to the State of Michigan that formally announced the intent to pursue compliance subcategories as ELG compliance options: the cessation of coal at the Belle River power plant no later than December 31, 2028 and the VIP for FGD wastewater at Monroe power plant by December 31, 2028. On July 27, 2021, the EPA announced they will revisit some of the compliance requirements that were established in the 2020 Reconsideration Rule and plan to release a new proposed rule in Fall of 2022. The 2020 Reconsideration Rule remains in effect until that time. DTE Electric continues to evaluate compliance strategies, technologies and system designs for both FGD wastewater and bottom ash transport water system to achieve compliance with the EPA rules at the Monroe power plant. DTE Electric has estimated the impact of the CCR and ELG rules to be $562 million of capital expenditures, including $457 million for 2022 through 2026. DTE Gas Contaminated and Other Sites — DTE Gas owns or previously owned 14 former MGP sites. Investigations have revealed contamination related to the by-products of gas manufacturing at each site. Cleanup of eight of the MGP sites is complete, and the sites are closed. DTE Gas has also completed partial closure of four additional sites. Cleanup activities associated with the remaining sites will continue over the next several years. The MPSC has established a cost deferral and rate recovery mechanism for investigation and remediation costs incurred at former MGP sites. In addition to the MGP sites, DTE Gas is also in the process of cleaning up other contaminated sites, including gate stations, gas pipeline releases, and underground storage tank locations. As of March 31, 2022 and December 31, 2021, DTE Gas had $24 million accrued for remediation. These costs are not discounted to their present value. Any change in assumptions, such as remediation techniques, nature and extent of contamination, and regulatory requirements, could impact the estimate of remedial action costs for the sites and affect DTE Gas' financial position and cash flows. DTE Gas anticipates the cost amortization methodology approved by the MPSC, which allows for amortization of the MGP costs over a ten-year period beginning with the year subsequent to the year the MGP costs were incurred, will prevent the associated investigation and remediation costs from having a material adverse impact on DTE Gas' results of operations. Non-utility DTE Energy's non-utility businesses are subject to a number of environmental laws and regulations dealing with the protection of the environment from various pollutants. In March 2019, the EPA issued an FOV to EES Coke Battery, LLC ("EES Coke"), the Michigan coke battery facility that is a wholly-owned subsidiary of DTE Energy, alleging that the 2008 and 2014 permits issued by EGLE did not comply with the Clean Air Act. In September 2020, the EPA issued another FOV alleging EES Coke's 2018 and 2019 SO2 emissions exceeded projections and hence violated non-attainment new source review requirements. EES Coke evaluated the EPA's alleged violations and believes that the permits approved by EGLE complied with the Clean Air Act. EES Coke also responded to the EPA's September 2020 allegations demonstrating its actual emissions are compliant with non-attainment new source review requirements. Discussions with the EPA are ongoing. At the present time, DTE Energy cannot predict the outcome or financial impact of this FOV. Additionally, in December 2021, EGLE issued a Notice of Violation to EES Coke alleging excess visible emissions from pushing operations. In January 2022, EES Coke provided EGLE a response describing the corrective actions taken to prevent future recurrences. At the present time, EES Coke cannot predict the outcome or financial impact of this matter. Other In 2010, the EPA finalized a new one-hour SO 2 ambient air quality standard that requires states to submit plans and associated timelines for non-attainment areas that demonstrate attainment with the new SO 2 standard in phases. Phase 1 addresses non-attainment areas designated based on ambient monitoring data. Phase 2 addresses non-attainment areas with large sources of SO 2 and modeled concentrations exceeding the National Ambient Air Quality Standards for SO 2 . Phase 3 addresses smaller sources of SO 2 with modeled or monitored exceedances of the new SO 2 standard. Michigan's Phase 1 non-attainment area includes DTE Energy facilities in southwest Detroit and areas of Wayne County. Modeling runs by EGLE suggest that emission reductions may be required by significant sources of SO 2 emissions in these areas, including DTE Electric power plants and DTE Energy's Michigan coke battery facility. As part Michigan's SIP process, DTE Energy has worked with EGLE to develop air permits reflecting significant SO 2 emission reductions that, in combination with other non-DTE Energy sources' emission reduction strategies, will help the State attain the standard and sustain its attainment. The Michigan SIP was completed and submitted to the EPA on May 31, 2016 and supplemented on June 30, 2016. On March 19, 2021, the EPA published in the Federal Register partial approval and partial disapproval of Michigan's Detroit SO2 non-attainment area plan. The partial disapproval does not appear to impact DTE's sources and further discussions are underway with the EPA to finalize the plan. Since several non-DTE Energy sources are also part of the proposed compliance plan, DTE Energy is unable to determine the full impact of any further emissions reductions that may be required from DTE's facilities at this time. Michigan's Phase 2 non-attainment area includes DTE Electric facilities in St. Clair County. The EPA approved a clean data determination request submitted by EGLE. This determination suspends certain planning requirements and sanctions for the non-attainment area for as long as the area continues to attain the 2010 SO2 air quality standards, but this does not automatically redesignate the area to attainment. Until the area is officially redesignated as attainment, DTE Energy is unable to determine the impacts. REF Guarantees DTE Energy has provided certain guarantees and indemnities in conjunction with the sales of interests in or lease of its REF facilities. The guarantees cover potential commercial, environmental, and tax-related obligations that will survive until 90 days after expiration of all applicable statutes of limitations. DTE Energy estimates that its maximum potential liability under these guarantees at March 31, 2022 was $720 million. Payments under these guarantees are considered remote. Other Guarantees In certain limited circumstances, the Registrants enter into contractual guarantees. The Registrants may guarantee another entity’s obligation in the event it fails to perform and may provide guarantees in certain indemnification agreements. The Registrants may also provide indirect guarantees for the indebtedness of others. DTE Energy’s guarantees are not individually material with maximum potential payments totaling $40 million at March 31, 2022. Payments under these guarantees are considered remote. The Registrants are periodically required to obtain performance surety bonds in support of obligations to various governmental entities and other companies in connection with its operations. As of March 31, 2022, DTE Energy had $135 million of performance bonds outstanding, including $119 million for DTE Electric. In the event that such bonds are called for nonperformance, the Registrants would be obligated to reimburse the issuer of the performance bond. The Registrants are released from the performance bonds as the contractual performance is completed and does not believe that a material amount of any currently outstanding performance bonds will be called. Labor Contracts There are several bargaining units for DTE Energy subsidiaries' approximate 5,200 represented employees, including DTE Electric's approximately 2,700 represented employees. This represents 50% and 56% of DTE Energy's and DTE Electric's total employees, respectively. Of these represented employees, approximately 14% and 21% have contracts expiring within one year for DTE Energy and DTE Electric, respectively. Purchase Commitments Utility capital expenditures and expenditures for non-utility businesses will be approximately $3.7 billion and $2.7 billion in 2022 for DTE Energy and DTE Electric, respectively. The Registrants have made certain commitments in connection with the estimated 2022 annual capital expenditures. Ludington Plant Contract Dispute DTE Electric and Consumers Energy Company ("Consumers"), joint owners of the Ludington Hydroelectric Pumped Storage plant ("Ludington"), are parties to a 2010 engineering, procurement, and construction contract with Toshiba America Energy Systems ("TAES"), under which TAES is charged with performing a major overhaul and upgrade of Ludington. TAES' performance has been unsatisfactory and resulted in overhaul project delays. DTE Electric and Consumers have demanded that TAES provide a comprehensive plan to resolve quality control concerns, including adherence to its warranty commitments and other contractual obligations. DTE Electric and Consumers have taken extensive efforts to resolve these issues with TAES, including a formal demand to TAES' parent, Toshiba Corporation, under a parent guaranty it provided in the contract. TAES has not provided a comprehensive plan or otherwise met its performance obligations. In order to enforce the contract, DTE Electric and Consumers filed a complaint against TAES and Toshiba Corporation in the U.S. District Court for the Eastern District of Michigan in April 2022. DTE Electric cannot predict the financial impact or outcome of this matter. Other Contingencies The Registrants are involved in certain other legal, regulatory, administrative, and environmental proceedings before various courts, arbitration panels, and governmental agencies concerning claims arising in the ordinary course of business. These proceedings include certain contract disputes, additional environmental reviews and investigations, audits, inquiries from various regulators, and pending judicial matters. The Registrants cannot predict the final disposition of such proceedings. The Registrants regularly review legal matters and record provisions for claims that they can estimate and are considered probable of loss. The resolution of these pending proceedings is not expected to have a material effect on the Registrants' Consolidated Financial Statements in the periods they are resolved. For a discussion of contingencies related to regulatory matters and derivatives, see Notes 6 and 9 to the Consolidated Financial Statements, "Regulatory Matters" and "Financial and Other Derivative Instruments," respectively.

Retirement Benefits and Trustee

Retirement Benefits and Trusteed Assets	3 Months Ended
	Mar. 31, 2022
Retirement Benefits [Abstract]
Retirement Benefits and Trusteed Assets	RETIREMENT BENEFITS AND TRUSTEED ASSETS The following tables detail the components of net periodic benefit costs (credits) for pension benefits and other postretirement benefits for DTE Energy: Pension Benefits Other Postretirement Benefits Three Months Ended March 31, 2022 2021 2022 2021 (In millions) Service cost $ 24 $ 27 $ 7 $ 8 Interest cost 41 39 12 11 Expected return on plan assets (87) (84) (32) (32) Amortization of: Net actuarial loss 29 49 1 3 Prior service credit — — (5) (5) Net periodic benefit cost (credit) $ 7 $ 31 $ (17) $ (15) DTE Electric participates in various plans that provide pension and other postretirement benefits for DTE Energy and its affiliates. The plans are primarily sponsored by DTE Energy's subsidiary, DTE Energy Corporate Services, LLC. DTE Electric accounts for its participation in DTE Energy's qualified and non-qualified pension plans by applying multiemployer accounting. DTE Electric accounts for its participation in other postretirement benefit plans by applying multiple-employer accounting. Within multiemployer and multiple-employer plans, participants pool plan assets for investment purposes and to reduce the cost of plan administration. The primary difference between plan types is assets contributed in multiemployer plans can be used to provide benefits for all participating employers, while assets contributed within a multiple-employer plan are restricted for use by the contributing employer. As a result of multiemployer accounting treatment, capitalized costs associated with these plans are reflected in Property, plant, and equipment in DTE Electric's Consolidated Statements of Financial Position. The same capitalized costs are reflected as Regulatory assets and liabilities in DTE Energy's Consolidated Statements of Financial Position. In addition, the service cost and non-service cost components are presented in Operation and maintenance in DTE Electric's Consolidated Statements of Operations. The same non-service cost components are presented in Other (Income) and Deductions — Non-operating retirement benefits, net in DTE Energy's Consolidated Statements of Operations. Plan participants of all plans are solely DTE Energy and affiliate participants. DTE Energy's subsidiaries are responsible for their share of qualified and non-qualified pension benefit costs. DTE Electric's allocated portion of pension benefit costs included in capital expenditures and operating and maintenance expense was $9 million and $26 million for the three months ended March 31, 2022 and 2021, respectively. These amounts include recognized contractual termination benefit charges, curtailment gains, and settlement charges. The following tables detail the components of net periodic benefit costs (credits) for other postretirement benefits for DTE Electric: Three Months Ended March 31, 2022 2021 (In millions) Service cost $ 5 $ 6 Interest cost 9 8 Expected return on plan assets (21) (22) Amortization of: Net actuarial loss 1 3 Prior service credit (3) (3) Net periodic benefit credit $ (9) $ (8) Pension and Other Postretirement Contributions No contributions are currently expected for DTE Energy's qualified pension plans or postretirement benefit plans in 2022. Plans may be updated at the discretion of management and depending on economic and financial market conditions. DTE Energy anticipates a transfer of up to $50 million of qualified pension plan funds from DTE Gas to DTE Electric during 2022.

Segment and Related Information

Segment and Related Information	3 Months Ended
	Mar. 31, 2022
Segment Reporting [Abstract]
Segment and Related Information	SEGMENT AND RELATED INFORMATION DTE Energy sets strategic goals, allocates resources, and evaluates performance based on the following structure: Electric segment consists principally of DTE Electric, which is engaged in the generation, purchase, distribution, and sale of electricity to approximately 2.3 million residential, commercial, and industrial customers in southeastern Michigan. Gas segment consists principally of DTE Gas, which is engaged in the purchase, storage, transportation, distribution, and sale of natural gas to approximately 1.3 million residential, commercial, and industrial customers throughout Michigan and the sale of storage and transportation capacity. DTE Vantage is comprised primarily of renewable energy projects that sell electricity and pipeline-quality gas and projects that deliver energy and utility-type products and services to industrial, commercial, and institutional customers. DTE Vantage formerly included projects that produced reduced emissions fuel; however, these projects were closed as planned in 2022 upon REF facilities exhausting their eligibility for generating production tax credits. Energy Trading consists of energy marketing and trading operations. Corporate and Other includes various holding company activities, holds certain non-utility debt, and holds certain investments, including funds supporting regional development and economic growth. On July 1, 2021, DTE Energy completed the separation of DT Midstream, which was comprised of the former Gas Storage and Pipelines segment and also certain holding company activity within the Corporate and Other segment. Amounts relating to DT Midstream have been classified as discontinued operations, and Gas Storage and Pipelines is no longer a reportable segment of DTE Energy. Refer to Note 4 to the Consolidated Financial Statements, “Discontinued Operations,” for additional information. Inter-segment billing for goods and services exchanged between segments is based upon tariffed or market-based prices of the provider and primarily consists of power sales, natural gas sales, and renewable natural gas sales in the segments below. For the prior period, inter-segment billing also included the sale of reduced emissions fuel at DTE Vantage. Three Months Ended March 31, 2022 2021 (In millions) Electric $ 16 $ 16 Gas 3 4 DTE Vantage 25 162 Energy Trading 17 13 Corporate and Other — 1 $ 61 $ 196 All inter-segment transactions and balances are eliminated in consolidation for DTE Energy. Centrally incurred costs such as labor and overheads are assigned directly to DTE Energy's business segments or allocated based on various cost drivers, depending on the nature of service provided. The federal income tax provisions or benefits of DTE Energy’s subsidiaries are determined on an individual company basis and recognize the tax benefit of tax credits and net operating losses, if applicable. The state and local income tax provisions of the utility subsidiaries are also determined on an individual company basis and recognize the tax benefit of various tax credits and net operating losses, if applicable. The subsidiaries record federal, state, and local income taxes payable to or receivable from DTE Energy based on the federal, state, and local tax provisions of each company. Financial data of DTE Energy's business segments follows: Three Months Ended March 31, 2022 2021 (In millions) Operating Revenues — Utility operations Electric $ 1,486 $ 1,360 Gas 766 612 Operating Revenues — Non-utility operations Electric 4 4 DTE Vantage 179 366 Energy Trading 2,203 1,439 Corporate and Other — 1 Reconciliation and Eliminations (a) (61) (201) Total $ 4,577 $ 3,581 _______________________________________ (a) Includes $5 million for the three months ended March 31, 2021 for eliminations related to DTE Energy's former Gas Storage and Pipelines segment that remain in continuing operations. Eliminations for these revenues are offset by related cost eliminations and have no impact on DTE Energy net income. Three Months Ended March 31, 2022 2021 (In millions) Net Income (Loss) Attributable to DTE Energy by Segment: Electric $ 201 $ 208 Gas 196 169 DTE Vantage 14 28 Energy Trading (9) (55) Corporate and Other (8) (30) Income from Continuing Operations Attributable to DTE Energy Company 394 320 Discontinued Operations — 77 Net Income Attributable to DTE Energy Company $ 394 $ 397

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2022
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The Consolidated Financial Statements should be read in conjunction with the Combined Notes to Consolidated Financial Statements included in the combined DTE Energy and DTE Electric 2021 Annual Report on Form 10-K. The accompanying Consolidated Financial Statements of the Registrants are prepared using accounting principles generally accepted in the United States of America. These accounting principles require management to use estimates and assumptions that impact reported amounts of assets, liabilities, revenues and expenses, and the disclosure of contingent assets and liabilities. Actual results may differ from the Registrants' estimates. The Consolidated Financial Statements are unaudited but, in the Registrants' opinions, include all adjustments necessary to present a fair statement of the results for the interim periods. All adjustments are of a normal recurring nature, except as otherwise disclosed in these Consolidated Financial Statements and Combined Notes to Consolidated Financial Statements. Financial results for this interim period are not necessarily indicative of results that may be expected for any other interim period or for the fiscal year ending December 31, 2022. The information in these combined notes relates to each of the Registrants as noted in the Index of Combined Notes to Consolidated Financial Statements. However, DTE Electric does not make any representation as to information related solely to DTE Energy or the subsidiaries of DTE Energy other than itself. Certain prior year balances for the Registrants were reclassified to match the current year's Consolidated Financial Statements presentation. Separation of DT Midstream On July 1, 2021, DTE Energy completed the separation of DT Midstream, its former natural gas pipeline, storage and gathering non-utility business. Financial results of DT Midstream are presented as Income from discontinued operations, net of taxes on DTE Energy's Consolidated Statements of Operations. Prior periods have been recast to reflect this presentation. No adjustments were made to the historical activity within the Consolidated Statements of Comprehensive Income, Consolidated Statements of Cash Flows, or the Consolidated Statements of Changes in Equity. Unless noted otherwise, discussion in the Notes to the Consolidated Financial Statements relate to continuing operations. Refer to Note 4 to the Consolidated Financial Statements, “Discontinued Operations,” for additional information.
Principles of Consolidation	Principles of Consolidation The Registrants consolidate all majority-owned subsidiaries and investments in entities in which they have controlling influence. Non-majority owned investments are accounted for using the equity method when the Registrants are able to significantly influence the operating policies of the investee. When the Registrants do not influence the operating policies of an investee, the equity investment is valued at cost minus any impairments, if applicable. These Consolidated Financial Statements also reflect the Registrants' proportionate interests in certain jointly-owned utility plants. The Registrants eliminate all intercompany balances and transactions. The Registrants evaluate whether an entity is a VIE whenever reconsideration events occur. The Registrants consolidate VIEs for which they are the primary beneficiary. If a Registrant is not the primary beneficiary and an ownership interest is held, the VIE is accounted for under the equity method of accounting. When assessing the determination of the primary beneficiary, a Registrant considers all relevant facts and circumstances, including: the power, through voting or similar rights, to direct the activities of the VIE that most significantly impact the VIE's economic performance and the obligation to absorb the expected losses and/or the right to receive the expected returns of the VIE. The Registrants perform ongoing reassessments of all VIEs to determine if the primary beneficiary status has changed. Legal entities within the DTE Vantage segment enter into long-term contractual arrangements with customers to supply energy-related products or services. The entities are generally designed to pass-through the commodity risk associated with these contracts to the customers, with DTE Energy retaining operational and customer default risk. These entities generally are VIEs and consolidated when DTE Energy is the primary beneficiary. In addition, DTE Energy has interests in certain VIEs through which control of all significant activities is shared with partners, and therefore are generally accounted for under the equity method. The Registrants hold ownership interests in certain limited partnerships. The limited partnerships include investment funds which support regional development and economic growth, and an operational business providing energy-related products. These entities are generally VIEs as a result of certain characteristics of the limited partnership voting rights. The ownership interests are accounted for under the equity method as the Registrants are not the primary beneficiaries. DTE Energy has variable interests in VIEs through certain of its long-term purchase and sale contracts. DTE Electric has variable interests in VIEs through certain of its long-term purchase contracts. As of March 31, 2022, the carrying amount of assets and liabilities in DTE Energy's Consolidated Statements of Financial Position that relate to its variable interests under long-term purchase and sale contracts are predominantly related to working capital accounts and generally represent the amounts owed by or to DTE Energy for the deliveries associated with the current billing cycle under the contracts. As of March 31, 2022, the carrying amount of assets and liabilities in DTE Electric's Consolidated Statements of Financial Position that relate to its variable interests under long-term purchase contracts are predominantly related to working capital accounts and generally represent the amounts owed by DTE Electric for the deliveries associated with the current billing cycle under the contracts. The Registrants have not provided any significant form of financial support associated with these long-term contracts. There is no material potential exposure to loss as a result of DTE Energy's variable interests through these long-term purchase and sale contracts. In addition, there is no material potential exposure to loss as a result of DTE Electric's variable interests through these long-term purchase contracts. In the first quarter 2022, DTE Electric financed regulatory assets for previously deferred costs related to the River Rouge generation plant and tree trimming surge program through the sale of bonds by a wholly-owned special purpose entity, DTE Securitization. DTE Securitization is a VIE. DTE Electric has the power to direct the most significant activities of DTE Securitization, including performing servicing activities such as billing and collecting surcharge revenue. Accordingly, DTE Electric is the primary beneficiary and DTE Securitization is consolidated by the Registrants. The maximum risk exposure for consolidated VIEs is reflected on the Registrants' Consolidated Statements of Financial Position. For non-consolidated VIEs, the maximum risk exposure of the Registrants is generally limited to their investment, notes receivable, and future funding commitments.
Changes in Accumulated Other Comprehensive Income (Loss)	Changes in Accumulated Other Comprehensive Income (Loss) Comprehensive income (loss) is the change in common shareholders' equity during a period from transactions and events from non-owner sources, including Net Income. The amounts recorded to Accumulated other comprehensive income (loss) for DTE Energy include changes in benefit obligations, consisting of deferred actuarial losses and prior service costs, unrealized gains and losses from derivatives accounted for as cash flow hedges, and foreign currency translation adjustments. DTE Energy releases income tax effects from accumulated other comprehensive income when the circumstances upon which they are premised cease to exist.
Cash, Cash Equivalents, and Restricted Cash	Cash, Cash Equivalents, and Restricted Cash Cash and cash equivalents include cash on hand, cash in banks, and temporary investments purchased with remaining maturities of three months or less. Restricted cash consists of funds held in separate bank accounts to satisfy contractual obligations, fund certain construction projects, and guarantee performance. Restricted cash also includes amounts at DTE Securitization to pay for debt service and other qualified costs. Restricted cash designated for payments within one year is classified as a Current Asset.
Financing Receivables	Financing Receivables Financing receivables are primarily composed of trade receivables, notes receivable, and unbilled revenue. The Registrants' financing receivables are stated at net realizable value. The Registrants monitor the credit quality of their financing receivables on a regular basis by reviewing credit quality indicators and monitoring for trigger events, such as a credit rating downgrade or bankruptcy. Credit quality indicators include, but are not limited to, ratings by credit agencies where available, collection history, collateral, counterparty financial statements and other internal metrics. Utilizing such data, the Registrants have determined three internal grades of credit quality. Internal grade 1 includes financing receivables for counterparties where credit rating agencies have ranked the counterparty as investment grade. To the extent credit ratings are not available, the Registrants utilize other credit quality indicators to determine the level of risk associated with the financing receivable. Internal grade 1 may include financing receivables for counterparties for which credit rating agencies have ranked the counterparty as below investment grade; however, due to favorable information on other credit quality indicators, the Registrants have determined the risk level to be similar to that of an investment grade counterparty. Internal grade 2 includes financing receivables for counterparties with limited credit information and those with a higher risk profile based upon credit quality indicators. Internal grade 3 reflects financing receivables for which the counterparties have the greatest level of risk, including those in bankruptcy status. The following represents the Registrants' financing receivables by year of origination, classified by internal grade of credit risk. The related credit quality indicators and risk ratings utilized to develop the internal grades have been updated through March 31, 2022. DTE Energy DTE Electric Year of Origination 2022 2021 2020 and Prior Total 2022 and Prior (In millions) Notes receivable Internal grade 1 $ — $ — $ 19 $ 19 $ 14 Internal grade 2 1 16 91 108 3 Total notes receivable (a) $ 1 $ 16 $ 110 $ 127 $ 17 Net investment in leases Net investment in leases, internal grade 1 $ — $ — $ 38 $ 38 $ — Net investment in leases, internal grade 2 — — 191 191 — Total net investment in leases (a) $ — $ — $ 229 $ 229 $ — _______________________________________ (a) For DTE Energy, included in Current Assets — Other and Other Assets — Notes Receivable on the Consolidated Statements of Financial Position. For DTE Electric, included in Current Assets — Other on the Consolidated Statements of Financial Position. The allowance for doubtful accounts on accounts receivable for the utility entities is generally calculated using an aging approach that utilizes rates developed in reserve studies. DTE Electric and DTE Gas establish an allowance for uncollectible accounts based on historical losses and management's assessment of existing and future economic conditions, customer trends and other factors. Customer accounts are generally considered delinquent if the amount billed is not received by the due date, which is typically in 21 days, however, factors such as assistance programs may delay aggressive action. DTE Electric and DTE Gas generally assess late payment fees on trade receivables based on past-due terms with customers. Customer accounts are written off when collection efforts have been exhausted. The time period for write-off is 150 days after service has been terminated. The customer allowance for doubtful accounts for non-utility businesses and other receivables for both utility and non-utility businesses is generally calculated based on specific review of probable future collections based on receivable balances generally in excess of 30 days. Existing and future economic conditions, customer trends and other factors are also considered. Receivables are written off on a specific identification basis and determined based upon the specific circumstances of the associated receivable. Notes receivable for DTE Energy are primarily comprised of finance lease receivables and loans that are included in Notes Receivable and Other current assets on DTE Energy's Consolidated Statements of Financial Position. Notes receivable for DTE Electric are primarily comprised of loans. Notes receivable are typically considered delinquent when payment is not received for periods ranging from 60 to 120 days. The Registrants cease accruing interest (nonaccrual status), consider a note receivable impaired, and establish an allowance for credit loss when it is probable that all principal and interest amounts due will not be collected in accordance with the contractual terms of the note receivable. In determining the allowance for credit losses for notes receivable, the Registrants consider the historical payment experience and other factors that are expected to have a specific impact on the counterparty's ability to pay including existing and future economic conditions. Cash payments received on nonaccrual status notes receivable, that do not bring the account contractually current, are first applied to the contractually owed past due interest, with any remainder applied to principal. Accrual of interest is generally resumed when the note receivable becomes contractually current.
Recently Adopted and Recently Issued Pronouncements	Recently Adopted Pronouncements In July 2021, the FASB issued ASU No. 2021-05, Leases (Topic 842): Lessors – Certain Leases with Variable Lease Payments. The amendments in this update modify lease classification requirements for lessors, providing that lease contracts with variable lease payments that do not depend on a reference index or a rate should be classified as operating leases if they would have been classified as a sales-type or direct financing lease and resulted in the recognition of a selling loss at lease commencement. The Registrants adopted the ASU effective January 1, 2022 using the prospective approach. The adoption of the ASU did not have a significant impact on the Registrants' Consolidated Financial Statements. In October 2021, the FASB issued ASU No. 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers . The amendments in this update require contract assets and contract liabilities acquired in a business combination to be recognized and measured by the acquirer on the acquisition date in accordance with ASC 606, Revenue from Contracts with Customers . Historically, such amounts were recognized by the acquirer at fair value in acquisition accounting. The Registrants early adopted the ASU effective January 1, 2022, which had no impact on the Registrants' Consolidated Financial Statements for the current period. The Registrants will apply the guidance prospectively to any future business combinations. Recently Issued Pronouncements In March 2022, the FASB issued ASU No. 2022-02, Financial Instruments – Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures. The amendments in this update eliminate the accounting guidance for troubled debt restructurings by creditors that have adopted the Current Expected Credit Loss (“CECL”) model under ASC 326 and enhance the disclosure requirements for loan refinancings and restructurings made with borrowers experiencing financial difficulty. Additionally, the amendments require the disclosure of current period gross write-offs for financing receivables and net investment in leases by year of origination in the vintage disclosures. The ASU is effective for the Registrants for fiscal years beginning after December 15, 2022, and interim periods therein. Early adoption is permitted. The Registrants will apply the guidance prospectively after the effective date.
Fair Value Measurement	Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date in a principal or most advantageous market. Fair value is a market-based measurement that is determined based on inputs, which refer broadly to assumptions that market participants use in pricing assets or liabilities. These inputs can be readily observable, market corroborated, or generally unobservable inputs. The Registrants make certain assumptions they believe that market participants would use in pricing assets or liabilities, including assumptions about risk, and the risks inherent in the inputs to valuation techniques. Credit risk of the Registrants and their counterparties is incorporated in the valuation of assets and liabilities through the use of credit reserves, the impact of which was immaterial at March 31, 2022 and December 31, 2021. The Registrants believe they use valuation techniques that maximize the use of observable market-based inputs and minimize the use of unobservable inputs. A fair value hierarchy has been established that prioritizes the inputs to valuation techniques used to measure fair value in three broad levels. The fair value hierarchy gives the highest priority to quoted prices (unadjusted) in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). In some cases, the inputs used to measure fair value might fall in different levels of the fair value hierarchy. All assets and liabilities are required to be classified in their entirety based on the lowest level of input that is significant to the fair value measurement in its entirety. Assessing the significance of a particular input may require judgment considering factors specific to the asset or liability and may affect the valuation of the asset or liability and its placement within the fair value hierarchy. The Registrants classify fair value balances based on the fair value hierarchy defined as follows: • Level 1 — Consists of unadjusted quoted prices in active markets for identical assets or liabilities that the Registrants have the ability to access as of the reporting date. • Level 2 — Consists of inputs other than quoted prices included within Level 1 that are directly observable for the asset or liability or indirectly observable through corroboration with observable market data. • Level 3 — Consists of unobservable inputs for assets or liabilities whose fair value is estimated based on internally developed models or methodologies using inputs that are generally less readily observable and supported by little, if any, market activity at the measurement date. Unobservable inputs are developed based on the best available information and subject to cost-benefit constraints.
Nuclear Decommissioning Trusts and Other Investments	Nuclear Decommissioning Trusts and Other Investments The nuclear decommissioning trusts and other investments hold debt and equity securities directly and indirectly through commingled funds. Exchange-traded debt and equity securities held directly, as well as publicly-traded commingled funds, are valued using quoted market prices in actively traded markets. Non-exchange traded fixed income securities are valued based upon quotations available from brokers or pricing services. Non-publicly traded commingled funds holding exchange-traded equity or debt securities are valued based on stated NAVs. There are no significant restrictions for these funds and investments may be redeemed with 7 to 65 days notice depending on the fund. There is no intention to sell the investment in these commingled funds. Private equity and other assets include a diversified group of funds that are classified as NAV assets. These funds primarily invest in limited partnerships, including private equity, private real estate and private credit. Distributions are received through the liquidation of the underlying fund assets over the life of the funds. There are generally no redemption rights. The limited partner must hold the fund for its life or find a third-party buyer, which may need to be approved by the general partner. The funds are established with varied contractual durations generally in the range of 7 years to 12 years. The fund life can often be extended by several years by the general partner, and further extended with the approval of the limited partners. Unfunded commitments related to these investments totaled $192 million and $199 million as of March 31, 2022 and December 31, 2021, respectively. Hedge funds and similar investments utilize a diversified group of strategies that attempt to capture uncorrelated sources of return. These investments include publicly traded mutual funds that are valued using quoted prices in actively traded markets, as well as insurance-linked and asset-backed securities that are valued using quotations from broker or pricing services. For pricing the nuclear decommissioning trusts and other investments, a primary price source is identified by asset type, class, or issue for each security. The trustee monitors prices supplied by pricing services and may use a supplemental price source or change the primary source of a given security if the trustee determines that another price source is considered preferable. The Registrants have obtained an understanding of how these prices are derived, including the nature and observability of the inputs used in deriving such prices.
Derivative Assets and Liabilities	Derivative Assets and Liabilities Derivative assets and liabilities are comprised of physical and financial derivative contracts, including futures, forwards, options, and swaps that are both exchange-traded and over-the-counter traded contracts. Various inputs are used to value derivatives depending on the type of contract and availability of market data. Exchange-traded derivative contracts are valued using quoted prices in active markets. The Registrants consider the following criteria in determining whether a market is considered active: frequency in which pricing information is updated, variability in pricing between sources or over time, and the availability of public information. Other derivative contracts are valued based upon a variety of inputs including commodity market prices, broker quotes, interest rates, credit ratings, default rates, market-based seasonality, and basis differential factors. The Registrants monitor the prices that are supplied by brokers and pricing services and may use a supplemental price source or change the primary price source of an index if prices become unavailable or another price source is determined to be more representative of fair value. The Registrants have obtained an understanding of how these prices are derived. Additionally, the Registrants selectively corroborate the fair value of their transactions by comparison of market-based price sources. Mathematical valuation models are used for derivatives for which external market data is not readily observable, such as contracts which extend beyond the actively traded reporting period. The Registrants have established a Risk Management Committee whose responsibilities include directly or indirectly ensuring all valuation methods are applied in accordance with predefined policies. The development and maintenance of the Registrants' forward price curves has been assigned to DTE Energy's Risk Management Department, which is separate and distinct from the trading functions within DTE Energy.
Fair Value Transfer	Derivatives are transferred between levels primarily due to changes in the source data used to construct price curves as a result of changes in market liquidity. Transfers in and transfers out are reflected as if they had occurred at the beginning of the period.
Derivatives	The Registrants recognize all derivatives at their fair value as Derivative assets or liabilities on their respective Consolidated Statements of Financial Position unless they qualify for certain scope exceptions, including the normal purchases and normal sales exception. Further, derivatives that qualify and are designated for hedge accounting are classified as either hedges of a forecasted transaction or the variability of cash flows to be received or paid related to a recognized asset or liability (cash flow hedge); or as hedges of the fair value of a recognized asset or liability or of an unrecognized firm commitment (fair value hedge). For cash flow hedges, the derivative gain or loss is deferred in Accumulated other comprehensive income (loss) and later reclassified into earnings when the underlying transaction occurs. For fair value hedges, changes in fair values for the derivative and hedged item are recognized in earnings each period. For derivatives that do not qualify or are not designated for hedge accounting, changes in fair value are recognized in earnings each period. The Registrants' primary market risk exposure is associated with commodity prices, credit, and interest rates. The Registrants have risk management policies to monitor and manage market risks. The Registrants use derivative instruments to manage some of the exposure. DTE Energy uses derivative instruments for trading purposes in its Energy Trading segment. Contracts classified as derivative instruments include electricity, natural gas, oil, certain environmental contracts, forwards, futures, options, swaps, and foreign currency exchange contracts. Items not classified as derivatives include natural gas and environmental inventory, pipeline transportation contracts, certain environmental contracts, and natural gas storage assets. DTE Electric — DTE Electric generates, purchases, distributes, and sells electricity. DTE Electric uses forward contracts to manage changes in the price of electricity and fuel. Substantially all of these contracts meet the normal purchases and normal sales exception and are therefore accounted for under the accrual method. Other derivative contracts are MTM and recoverable through the PSCR mechanism when settled. This results in the deferral of unrealized gains and losses as Regulatory assets or liabilities until realized. DTE Gas — DTE Gas purchases, stores, transports, distributes, and sells natural gas, and buys and sells transportation and storage capacity. DTE Gas has fixed-priced contracts for portions of its expected natural gas supply requirements through March 2025. Substantially all of these contracts meet the normal purchases and normal sales exception and are therefore accounted for under the accrual method. Forward transportation and storage contracts are generally not derivatives and are therefore accounted for under the accrual method. DTE Vantage — This segment manages and operates renewable gas recovery projects, industrial energy projects, and power generation assets. Long-term contracts and hedging instruments are used in the marketing and management of the segment assets. These contracts and hedging instruments are generally not derivatives and are therefore accounted for under the accrual method. Energy Trading — Commodity Price Risk — Energy Trading markets and trades electricity, natural gas physical products, and energy financial instruments, and provides energy and asset management services utilizing energy commodity derivative instruments. Forwards, futures, options, and swap agreements are used to manage exposure to the risk of market price and volume fluctuations in its operations. These derivatives are accounted for by recording changes in fair value to earnings unless hedge accounting criteria are met. Energy Trading — Foreign Currency Exchange Risk — Energy Trading has foreign currency exchange forward contracts to economically hedge fixed Canadian dollar commitments existing under natural gas and power purchase and sale contracts and natural gas transportation contracts. Energy Trading enters into these contracts to mitigate price volatility with respect to fluctuations of the Canadian dollar relative to the U.S. dollar. These derivatives are accounted for by recording changes in fair value to earnings unless hedge accounting criteria are met. Corporate and Other — Interest Rate Risk — DTE Energy may use interest rate swaps, treasury locks, and other derivatives to hedge the risk associated with interest rate market volatility. Credit Risk — DTE Energy maintains credit policies that significantly minimize overall credit risk. These policies include an evaluation of potential customers’ and counterparties’ financial condition, including the viability of underlying productive assets, credit rating, collateral requirements, or other credit enhancements such as letters of credit or guarantees. DTE Energy generally uses standardized agreements that allow the netting of positive and negative transactions associated with a single counterparty. DTE Energy maintains a provision for credit losses based on factors surrounding the credit risk of its customers, historical trends, and other information. Based on DTE Energy's credit policies and its March 31, 2022 provision for credit losses, DTE Energy’s exposure to counterparty nonperformance is not expected to have a material adverse effect on DTE Energy's Consolidated Financial Statements.
Derivatives, Offsetting Fair Value Amounts	Certain of DTE Energy's derivative positions are subject to netting arrangements which provide for offsetting of asset and liability positions as well as related cash collateral. Such netting arrangements generally do not have restrictions. Under such netting arrangements, DTE Energy offsets the fair value of derivative instruments with cash collateral received or paid for those contracts executed with the same counterparty, which reduces DTE Energy's Total Assets and Liabilities. Cash collateral is allocated between the fair value of derivative instruments and customer accounts receivable and payable with the same counterparty on a pro-rata basis to the extent there is exposure. Any cash collateral remaining, after the exposure is netted to zero, is reflected in Accounts receivable and Accounts payable as collateral paid or received, respectively. DTE Energy also provides and receives collateral in the form of letters of credit which can be offset against net Derivative assets and liabilities as well as Accounts receivable and payable. DTE Energy had issued letters of credit of $13 million and $18 million outstanding at March 31, 2022 and December 31, 2021, respectively, which could be used to offset net Derivative liabilities. Letters of credit received from third parties which could be used to offset net Derivative assets were $45 million and $37 million at March 31, 2022 and December 31, 2021, respectively. Such balances of letters of credit are excluded from the tables below and are not netted with the recognized assets and liabilities in DTE Energy's Consolidated Statements of Financial Position. For contracts with certain clearing agents, the fair value of derivative instruments is netted against realized positions with the net balance reflected as either 1) a Derivative asset or liability or 2) an Account receivable or payable. Other than certain clearing agents, Accounts receivable and Accounts payable that are subject to netting arrangements have not been offset against the fair value of Derivative assets and liabilities.
Derivatives, Methods of Accounting	Revenues and energy costs related to trading contracts are presented on a net basis in DTE Energy's Consolidated Statements of Operations. Commodity derivatives used for trading purposes, and financial non-trading commodity derivatives, are accounted for using the MTM method with unrealized and realized gains and losses recorded in Operating Revenues — Non-utility operations. Non-trading physical commodity sale and purchase derivative contracts are generally accounted for using the MTM method with unrealized and realized gains and losses for sales recorded in Operating Revenues — Non-utility operations and purchases recorded in Fuel, purchased power, gas, and other — non-utility.

Organization and Basis of Pre_2

Organization and Basis of Presentation (Tables)	3 Months Ended
	Mar. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Variable Interest Entities	The following table summarizes the major Consolidated Statements of Financial Position items for consolidated VIEs as of March 31, 2022 and December 31, 2021. All assets and liabilities of a consolidated VIE are presented where it has been determined that a consolidated VIE has either (1) assets that can be used only to settle obligations of the VIE or (2) liabilities for which creditors do not have recourse to the general credit of the primary beneficiary. VIEs, in which DTE Energy holds a majority voting interest and is the primary beneficiary, that meet the definition of a business and whose assets can be used for purposes other than the settlement of the VIE's obligations have been excluded from the table below. Amounts for the Registrants' consolidated VIEs are as follows: March 31, 2022 December 31, 2021 DTE Energy DTE Electric (a) DTE Energy (In millions) ASSETS Cash and cash equivalents $ 10 $ — $ 11 Restricted cash 4 1 6 Securitized regulatory assets 229 229 — Notes receivable 80 — 70 Other current and long-term assets 10 2 8 $ 333 $ 232 $ 95 LIABILITIES Short-term borrowings $ 82 $ — $ 75 Securitization bonds (b) 230 230 — Other current and long-term liabilities 7 1 5 $ 319 $ 231 $ 80 _______________________________________ (a) DTE Electric amounts reflect DTE Securitization, which was a new VIE beginning the first quarter of 2022. See Note 6 to the Consolidated Financial Statements, "Regulatory Matters." (b) Includes $21 million reported in Current portion of long-term debt on the Registrants' Consolidated Statements of Financial Position for the period ended March 31, 2022.
Summary of Amounts for Non-Consolidated Variable Interest Entities	Amounts for DTE Energy's non-consolidated VIEs are as follows: March 31, 2022 December 31, 2021 (In millions) Investments in equity method investees $ 157 $ 172 Notes receivable $ 13 $ 13 Future funding commitments $ 3 $ 3

Significant Accounting Polici_3

Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2022
Accounting Policies [Abstract]
Schedule of Other Income	The following is a summary of DTE Energy's Other income: Three Months Ended March 31, 2022 2021 (In millions) Allowance for equity funds used during construction $ 8 $ 7 Contract services 7 8 Income from REF entities — 24 Gains from rabbi trust securities (a) — 2 Equity earnings (losses) of equity method investees (11) 1 Other 4 1 $ 8 $ 43 _______________________________________ (a) Losses from rabbi trust securities are recorded separately to Other expenses on the Consolidated Statements of Operations. The following is a summary of DTE Electric's Other income: Three Months Ended March 31, 2022 2021 (In millions) Contract services $ 7 $ 8 Allowance for equity funds used during construction 7 6 Gains from rabbi trust securities allocated from DTE Energy (a) — 2 Other 2 3 $ 16 $ 19 _______________________________________ (a) Losses from rabbi trust securities are recorded separately to Other expenses on the Consolidated Statements of Operations.
Schedule of Effective Tax Rates	The interim effective tax rates of the Registrants are as follows: Effective Tax Rate Three Months Ended March 31, 2022 2021 DTE Energy 4 % (2) % DTE Electric 2 % 9 %
Schedule of Financing Receivables Classified by Internal Grade of Credit Risk	The following represents the Registrants' financing receivables by year of origination, classified by internal grade of credit risk. The related credit quality indicators and risk ratings utilized to develop the internal grades have been updated through March 31, 2022. DTE Energy DTE Electric Year of Origination 2022 2021 2020 and Prior Total 2022 and Prior (In millions) Notes receivable Internal grade 1 $ — $ — $ 19 $ 19 $ 14 Internal grade 2 1 16 91 108 3 Total notes receivable (a) $ 1 $ 16 $ 110 $ 127 $ 17 Net investment in leases Net investment in leases, internal grade 1 $ — $ — $ 38 $ 38 $ — Net investment in leases, internal grade 2 — — 191 191 — Total net investment in leases (a) $ — $ — $ 229 $ 229 $ — _______________________________________ (a) For DTE Energy, included in Current Assets — Other and Other Assets — Notes Receivable on the Consolidated Statements of Financial Position. For DTE Electric, included in Current Assets — Other on the Consolidated Statements of Financial Position.
Schedule of Roll-Forward of Activity for Financing Receivables Credit Loss Reserves	The following tables present a roll-forward of the activity for the Registrants' financing receivables credit loss reserves: DTE Energy DTE Electric Trade accounts receivable Other receivables Total Trade and other accounts receivable (In millions) Beginning reserve balance, January 1, 2022 $ 89 $ 3 $ 92 $ 54 Current period provision 20 — 20 8 Write-offs charged against allowance (25) — (25) (18) Recoveries of amounts previously written off 13 — 13 9 Ending reserve balance, March 31, 2022 $ 97 $ 3 $ 100 $ 53 DTE Energy DTE Electric Trade accounts receivable Other receivables Total Trade and other accounts receivable (In millions) Beginning reserve balance, January 1, 2021 $ 101 $ 3 $ 104 $ 57 Current period provision 53 1 54 36 Write-offs charged against allowance (126) (1) (127) (77) Recoveries of amounts previously written off 61 — 61 38 Ending reserve balance, December 31, 2021 $ 89 $ 3 $ 92 $ 54
Schedule of Uncollectible Expense	Uncollectible expense for the Registrants is primarily comprised of the current period provision for allowance for doubtful accounts and is summarized as follows: Three Months Ended March 31, 2022 2021 (In millions) DTE Energy $ 20 $ 31 DTE Electric $ 8 $ 11

Discontinued Operations (Tables

Discontinued Operations (Tables)	3 Months Ended
	Mar. 31, 2022
Discontinued Operations and Disposal Groups [Abstract]
Schedule of Discontinued Operations	The table below reflects the financial results of DT Midstream that are included in discontinued operations within the Consolidated Statements of Operations. These results include the impact of tax-related adjustments and all transaction costs related to the separation. General corporate overhead costs have been excluded and no portion of corporate interest costs were allocated to discontinued operations. Three Months Ended March 31, 2021 (In millions) Operating Revenues — Non-utility operations $ 197 Operating Expenses Cost of gas and other — non-utility 5 Operation and maintenance (a) 41 Depreciation and amortization 41 Taxes other than income 7 Asset (gains) losses and impairments, net (1) 93 Operating Income 104 Other (Income) and Deductions Interest expense 26 Interest income (3) Other income (33) (10) Income from Discontinued Operations Before Income Taxes 114 Income Tax Expense 34 Net Income from Discontinued Operations, Net of Taxes 80 Less: Net Income Attributable to Noncontrolling Interests 3 Net Income from Discontinued Operations $ 77 _______________________________________ (a) Includes separation transaction costs of $10 million for the three months ended March 31, 2021 for various legal, accounting and other professional services fees. The following table is a summary of significant non-cash items and capital expenditures of discontinued operations included in DTE Energy's Consolidated Statements of Cash Flows: Three Months Ended March 31, 2021 (In millions) Operating Activities Depreciation and amortization $ 41 Deferred income taxes 33 Equity earnings of equity method investees (31) Investing Activities Plant and equipment expenditures — non-utility $ (27)

Revenue (Tables)

Revenue (Tables)	3 Months Ended
	Mar. 31, 2022
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following is a summary of revenues disaggregated by segment for DTE Energy: Three Months Ended March 31, 2022 2021 (In millions) Electric (a) Residential $ 700 $ 672 Commercial 477 451 Industrial 161 159 Other (b) 152 82 Total Electric operating revenues $ 1,490 $ 1,364 Gas Gas sales $ 596 $ 461 End User Transportation 98 85 Intermediate Transportation 29 26 Other (b) 43 40 Total Gas operating revenues $ 766 $ 612 Other segment operating revenues DTE Vantage $ 179 $ 366 Energy Trading $ 2,203 $ 1,439 _______________________________________ (a) Revenues generally represent those of DTE Electric, except $4 million of Other revenues related to DTE Sustainable Generation for the three months ended March 31, 2022 and 2021. (b) Includes revenue adjustments related to various regulatory mechanisms. Revenues included the following which were outside the scope of Topic 606: Three Months Ended March 31, 2022 2021 (In millions) Electric — Other revenues $ 4 $ 3 Gas — Other revenues $ 2 $ 2 DTE Vantage — Leases $ 20 $ 21 Energy Trading — Derivatives $ 1,734 $ 1,146
Summary of Deferred Revenue Activity	The following is a summary of deferred revenue activity: DTE Energy (In millions) Beginning Balance, January 1, 2022 $ 78 Increases due to cash received or receivable, excluding amounts recognized as revenue during the period 27 Revenue recognized that was included in the deferred revenue balance at the beginning of the period (26) Ending Balance, March 31, 2022 $ 79
Deferred Revenue Amounts Expected to be Recognized as Revenue in Future Periods	The following table represents deferred revenue amounts for DTE Energy that are expected to be recognized as revenue in future periods: DTE Energy (In millions) 2022 $ 68 2023 8 2024 1 2025 — 2026 — 2027 and thereafter 2 $ 79 The Registrants expect to recognize revenue for the following amounts related to fixed consideration associated with remaining performance obligations in each of the future periods noted: DTE Energy DTE Electric (In millions) 2022 $ 218 $ 6 2023 296 7 2024 183 7 2025 106 1 2026 63 — 2027 and thereafter 365 — $ 1,231 $ 21

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2022
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The following is a reconciliation of DTE Energy's basic and diluted income per share calculation: Three Months Ended March 31, 2022 2021 (In millions, except per share amounts) Basic Earnings per Share Net Income Attributable to DTE Energy Company — continuing operations $ 394 $ 320 Less: Allocation of earnings to net restricted stock awards 1 — $ 393 $ 320 Net Income Attributable to DTE Energy Company — discontinued operations — 77 Net income available to common shareholders — basic $ 393 $ 397 Average number of common shares outstanding — basic 193 194 Income from continuing operations $ 2.03 $ 1.65 Income from discontinued operations — 0.40 Basic Earnings per Common Share $ 2.03 $ 2.05 Diluted Earnings per Share Net Income Attributable to DTE Energy Company — continuing operations $ 394 $ 320 Less: Allocation of earnings to net restricted stock awards 1 — $ 393 $ 320 Net Income Attributable to DTE Energy Company — discontinued operations — 77 Net income available to common shareholders — diluted $ 393 $ 397 Average number of common shares outstanding — basic 193 194 Average dilutive equity units and performance share awards 1 — Average number of common shares outstanding — diluted 194 194 Income from continuing operations $ 2.03 $ 1.65 Income from discontinued operations — 0.40 Diluted Earnings per Common Share (a) $ 2.03 $ 2.05 _______________________________________ (a) Equity units excluded from the calculation of diluted EPS were approximately 10.7 million and 10.3 million for the three months ended March 31, 2022 and 2021, respectively, as the dilutive stock price threshold was not met.

Fair Value (Tables)

Fair Value (Tables)	3 Months Ended
	Mar. 31, 2022
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis	The following table presents assets and liabilities for DTE Energy measured and recorded at fair value on a recurring basis: March 31, 2022 December 31, 2021 Level Level Level Other (a) Netting (b) Net Balance Level Level Level Other (a) Netting (b) Net Balance (In millions) Assets Cash equivalents (c) $ 123 $ — $ — $ — $ — $ 123 $ 4 $ — $ — $ — $ — $ 4 Nuclear decommissioning trusts Equity securities 851 — — 182 — 1,033 917 — — 190 — 1,107 Fixed income securities 112 398 — 99 — 609 124 418 — 102 — 644 Private equity and other — — — 236 — 236 — — — 205 — 205 Hedge funds and similar investments 65 30 — — — 95 58 18 — — — 76 Cash equivalents 37 — — — — 37 39 — — — — 39 Other investments (d) Equity securities 65 — — — — 65 68 — — — — 68 Fixed income securities 7 — — — — 7 7 — — — — 7 Cash equivalents 71 — — — — 71 86 — — — — 86 Derivative assets Commodity contracts (e) Natural gas 505 135 71 — (679) 32 273 115 66 — (394) 60 Electricity — 1,006 328 — (905) 429 — 500 143 — (441) 202 Environmental & Other — 325 7 — (327) 5 — 285 9 — (285) 9 Total derivative assets 505 1,466 406 — (1,911) 466 273 900 218 — (1,120) 271 Total $ 1,836 $ 1,894 $ 406 $ 517 $ (1,911) $ 2,742 $ 1,576 $ 1,336 $ 218 $ 497 $ (1,120) $ 2,507 Liabilities Derivative liabilities Commodity contracts (e) Natural gas $ (232) $ (372) $ (301) $ — $ 553 $ (352) $ (177) $ (172) $ (245) $ — $ 347 $ (247) Electricity — (880) (445) — 950 (375) — (434) (188) — 443 (179) Environmental & Other — (325) (1) — 326 — — (288) — — 288 — Foreign currency exchange contracts — (6) — — — (6) — (4) — — (4) Total $ (232) $ (1,583) $ (747) $ — $ 1,829 $ (733) $ (177) $ (898) $ (433) $ — $ 1,078 $ (430) Net Assets (Liabilities) at end of period $ 1,604 $ 311 $ (341) $ 517 $ (82) $ 2,009 $ 1,399 $ 438 $ (215) $ 497 $ (42) $ 2,077 Assets Current $ 532 $ 1,128 $ 339 $ — $ (1,524) $ 475 $ 227 $ 646 $ 166 $ — $ (854) $ 185 Noncurrent 1,304 766 67 517 (387) 2,267 1,349 690 52 497 (266) 2,322 Total Assets $ 1,836 $ 1,894 $ 406 $ 517 $ (1,911) $ 2,742 $ 1,576 $ 1,336 $ 218 $ 497 $ (1,120) $ 2,507 Liabilities Current $ (218) $ (1,165) $ (485) $ — $ 1,415 $ (453) $ (168) $ (609) $ (260) $ — $ 799 $ (238) Noncurrent (14) (418) (262) — 414 (280) (9) (289) (173) — 279 (192) Total Liabilities $ (232) $ (1,583) $ (747) $ — $ 1,829 $ (733) $ (177) $ (898) $ (433) $ — $ 1,078 $ (430) Net Assets (Liabilities) at end of period $ 1,604 $ 311 $ (341) $ 517 $ (82) $ 2,009 $ 1,399 $ 438 $ (215) $ 497 $ (42) $ 2,077 _______________________________________ (a) Amounts represent assets valued at NAV as a practical expedient for fair value. (b) Amounts represent the impact of master netting agreements that allow DTE Energy to net gain and loss positions and cash collateral held or placed with the same counterparties. (c) Amounts consisted of $3 million and $1 million of cash equivalents included in Restricted cash on DTE Energy's Consolidated Statements of Financial Position at March 31, 2022 and December 31, 2021, respectively. All other amounts are included in Cash and cash equivalents on DTE Energy's Consolidated Statements of Financial Position. (d) Excludes cash surrender value of life insurance investments. (e) For contracts with a clearing agent, DTE Energy nets all activity across commodities. This can result in some individual commodities having a contra balance. The following table presents assets for DTE Electric measured and recorded at fair value on a recurring basis as of: March 31, 2022 December 31, 2021 Level 1 Level 2 Level 3 Other (a) Net Balance Level 1 Level 2 Level 3 Other (a) Net Balance (In millions) Assets Cash equivalents (b) $ 38 $ — $ — $ — $ 38 $ — $ — $ — $ — $ — Nuclear decommissioning trusts Equity securities 851 — — 182 1,033 917 — — 190 1,107 Fixed income securities 112 398 — 99 609 124 418 — 102 644 Private equity and other — — — 236 236 — — — 205 205 Hedge funds and similar investments 65 30 — — 95 58 18 — — 76 Cash equivalents 37 — — — 37 39 — — — 39 Other investments Equity securities 20 — — — 20 20 — — — 20 Cash equivalents 11 — — — 11 11 — — — 11 Derivative assets — FTRs — — 3 — 3 — — 9 — 9 Total $ 1,134 $ 428 $ 3 $ 517 $ 2,082 $ 1,169 $ 436 $ 9 $ 497 $ 2,111 Assets Current $ 38 $ — $ 3 $ — $ 41 $ — $ — $ 9 $ — $ 9 Noncurrent 1,096 428 — 517 2,041 1,169 436 — 497 2,102 Total Assets $ 1,134 $ 428 $ 3 $ 517 $ 2,082 $ 1,169 $ 436 $ 9 $ 497 $ 2,111 _______________________________________ (a) Amounts represent assets valued at NAV as a practical expedient for fair value. (b) Amounts consisted of $1 million of cash equivalents included in Restricted cash on DTE Electric's Consolidated Statements of Financial Position at March 31, 2022. All other amounts are included in Cash and cash equivalents on DTE Electric's Consolidated Statements of Financial Position.
Reconciliation of Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis	The following table presents the fair value reconciliation of Level 3 assets and liabilities measured at fair value on a recurring basis for DTE Energy: Three Months Ended March 31, 2022 Three Months Ended March 31, 2021 Natural Gas Electricity Other Total Natural Gas Electricity Other Total (In millions) Net Assets (Liabilities) as of December 31 $ (179) $ (45) $ 9 $ (215) $ (16) $ 10 $ 4 $ (2) Transfers from Level 3 into Level 2 5 — — 5 — — — — Total gains (losses) Included in earnings (a) (171) (50) 3 (218) (67) 26 — (41) Recorded in Regulatory liabilities — — (4) (4) — — (1) (1) Purchases, issuances, and settlements Settlements 115 (22) (2) 91 (6) (55) (2) (63) Net Assets (Liabilities) as of March 31 $ (230) $ (117) $ 6 $ (341) $ (89) $ (19) $ 1 $ (107) Total gains (losses) included in Net Income attributed to the change in unrealized gains (losses) related to assets and liabilities held at March 31 (a) $ (129) $ (64) $ 3 $ (190) $ (93) $ (7) $ — $ (100) _______________________________________ (a) Amounts are reflected in Operating Revenues — Non-utility operations and Fuel, purchased power, gas, and other — non-utility in DTE Energy's Consolidated Statements of Operations. The following table presents the fair value reconciliation of Level 3 assets and liabilities measured at fair value on a recurring basis for DTE Electric: Three Months Ended March 31, 2022 2021 (In millions) Net Assets as of beginning of period $ 9 $ 4 Total losses recorded in Regulatory liabilities (4) (1) Purchases, issuances, and settlements Settlements (2) (2) Net Assets as of March 31 $ 3 $ 1
Unobservable Inputs Related to Level 3 Assets and Liabilities	The following tables present the unobservable inputs related to DTE Energy's Level 3 assets and liabilities: March 31, 2022 Commodity Contracts Derivative Assets Derivative Liabilities Valuation Techniques Unobservable Input Range Weighted Average (In millions) Natural Gas $ 71 $ (301) Discounted Cash Flow Forward basis price (per MMBtu) $ (1.54) — $ 6.46 /MMBtu $ (0.10) /MMBtu Electricity $ 328 $ (445) Discounted Cash Flow Forward basis price (per MWh) $ (12) — $ 8 /MWh $ (2) /MWh December 31, 2021 Commodity Contracts Derivative Assets Derivative Liabilities Valuation Techniques Unobservable Input Range Weighted Average (In millions) Natural Gas $ 66 $ (245) Discounted Cash Flow Forward basis price (per MMBtu) $ (1.36) — $ 3.82 /MMBtu $ (0.04) /MMBtu Electricity $ 143 $ (188) Discounted Cash Flow Forward basis price (per MWh) $ (12) — $ 7 /MWh $ (2) /MWh
Carrying Amount of Fair Value of Financial Instruments	The following table presents the carrying amount and fair value of financial instruments for DTE Energy: March 31, 2022 December 31, 2021 Carrying Fair Value Carrying Fair Value Amount Level 1 Level 2 Level 3 Amount Level 1 Level 2 Level 3 (In millions) Notes receivable (a) , excluding lessor finance leases $ 127 $ — $ — $ 140 $ 150 $ — $ — $ 167 Short-term borrowings $ 244 $ — $ 244 $ — $ 758 $ — $ 758 $ — Notes payable (b) $ 17 $ — $ — $ 17 $ 27 $ — $ — $ 27 Long-term debt (c) $ 18,249 $ 2,247 $ 15,029 $ 1,163 $ 17,378 $ 2,284 $ 15,425 $ 1,207 _______________________________________ (a) Current portion included in Current Assets — Other on DTE Energy's Consolidated Statements of Financial Position. (b) Included in Current Liabilities — Other and Other Liabilities — Other on DTE Energy's Consolidated Statements of Financial Position. (c) Includes debt due within one year and excludes finance lease obligations. Carrying value also includes unamortized debt discounts and issuance costs. The following table presents the carrying amount and fair value of financial instruments for DTE Electric: March 31, 2022 December 31, 2021 Carrying Fair Value Carrying Fair Value Amount Level 1 Level 2 Level 3 Amount Level 1 Level 2 Level 3 (In millions) Notes receivable (a) $ 17 $ — $ — $ 17 $ 17 $ — $ — $ 17 Short-term borrowings — affiliates $ — $ — $ — $ — $ 53 $ — $ — $ 53 Short-term borrowings — other $ — $ — $ — $ — $ 153 $ — $ 153 $ — Notes payable (b) $ 17 $ — $ — $ 17 $ 27 $ — $ — $ 27 Long-term debt (c) $ 9,775 $ — $ 9,824 $ 169 $ 8,907 $ — $ 9,898 $ 150 _______________________________________ (a) Included in Current Assets — Other on DTE Electric's Consolidated Statements of Financial Position. (b) Included in Current Liabilities — Other and Other Liabilities — Other on DTE Electric's Consolidated Statements of Financial Position. (c) Includes debt due within one year and excludes finance lease obligations. Carrying value also includes unamortized debt discounts and issuance costs.
Fair Value of Nuclear Decommissioning Trust Fund Assets	The following table summarizes DTE Electric's fair value of the nuclear decommissioning trust fund assets: March 31, 2022 December 31, 2021 (In millions) Fermi 2 $ 1,990 $ 2,051 Fermi 1 3 3 Low-level radioactive waste 17 17 $ 2,010 $ 2,071
Schedule of Realized Gains and Losses and Proceeds from Sale of Securities by Nuclear Decommissioning Trust Funds	The following table sets forth DTE Electric's gains and losses and proceeds from the sale of securities by the nuclear decommissioning trust funds: Three Months Ended March 31, 2022 2021 (In millions) Realized gains $ 14 $ 24 Realized losses $ (5) $ (2) Proceeds from sale of securities $ 207 $ 271
Fair Value and Unrealized Gains and Losses for Nuclear Decommissioning Trust Funds	The following table sets forth DTE Electric's fair value and unrealized gains and losses for the nuclear decommissioning trust funds: March 31, 2022 December 31, 2021 Fair Unrealized Unrealized Fair Unrealized Unrealized (In millions) Equity securities $ 1,033 $ 488 $ (13) $ 1,107 $ 546 $ (9) Fixed income securities 609 11 (30) 644 23 (6) Private equity and other 236 70 (2) 205 58 (8) Hedge funds and similar investments 95 1 (4) 76 1 (2) Cash equivalents 37 — — 39 — — $ 2,010 $ 570 $ (49) $ 2,071 $ 628 $ (25)
Fair Value of the Fixed Income Securities Held in Nuclear Decommissioning Trust Funds	The following table summarizes the fair value of the fixed income securities held in nuclear decommissioning trust funds by contractual maturity: March 31, 2022 (In millions) Due within one year $ 20 Due after one through five years 127 Due after five through ten years 98 Due after ten years 265 $ 510
Summary of Gains (Losses) Related to the Trust	The following table summarizes the Registrant's gains (losses) related to the trust: Three Months Ended March 31, 2022 2021 (In millions) Gains (losses) related to equity securities $ (1) $ 2 Gains (losses) related to fixed income securities — — $ (1) $ 2

Financial and Other Derivativ_2

Financial and Other Derivative Instruments (Tables)	3 Months Ended
	Mar. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Value of Derivative Instruments	The following table presents the fair value of derivative instruments for DTE Energy: March 31, 2022 December 31, 2021 Derivative Derivative Liabilities Derivative Derivative Liabilities (In millions) Derivatives designated as hedging instruments Foreign currency exchange contracts $ — $ (4) $ — $ (4) Derivatives not designated as hedging instruments Commodity contracts Natural gas $ 711 $ (905) $ 454 $ (594) Electricity 1,334 (1,325) 643 (622) Environmental & Other 332 (326) 294 (288) Foreign currency exchange contracts — (2) — — Total derivatives not designated as hedging instruments $ 2,377 $ (2,558) $ 1,391 $ (1,504) Current $ 1,876 $ (1,868) $ 1,035 $ (1,037) Noncurrent 501 (694) 356 (471) Total derivatives $ 2,377 $ (2,562) $ 1,391 $ (1,508)
Offsetting Assets	The following table presents net cash collateral offsetting arrangements for DTE Energy: March 31, 2022 December 31, 2021 (In millions) Cash collateral netted against Derivative assets $ (225) $ (90) Cash collateral netted against Derivative liabilities 143 48 Cash collateral recorded in Accounts receivable (a) 36 55 Cash collateral recorded in Accounts payable (a) (16) (21) Total net cash collateral posted (received) $ (62) $ (8) _______________________________________ (a) Amounts are recorded net by counterparty. The following table presents the netting offsets of Derivative assets and liabilities for DTE Energy: March 31, 2022 December 31, 2021 Gross Amounts of Recognized Assets (Liabilities) Gross Amounts Offset in the Consolidated Statements of Financial Position Net Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position Gross Amounts of Recognized Assets (Liabilities) Gross Amounts Offset in the Consolidated Statements of Financial Position Net Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position (In millions) Derivative assets Commodity contracts Natural gas $ 711 $ (679) $ 32 $ 454 $ (394) $ 60 Electricity 1,334 (905) 429 643 (441) 202 Environmental & Other 332 (327) 5 294 (285) 9 Total derivative assets $ 2,377 $ (1,911) $ 466 $ 1,391 $ (1,120) $ 271 Derivative liabilities Commodity contracts Natural gas $ (905) $ 553 $ (352) $ (594) $ 347 $ (247) Electricity (1,325) 950 (375) (622) 443 (179) Environmental & Other (326) 326 — (288) 288 — Foreign currency exchange contracts (6) — (6) (4) — (4) Total derivative liabilities $ (2,562) $ 1,829 $ (733) $ (1,508) $ 1,078 $ (430)
Offsetting Liabilities	The following table presents net cash collateral offsetting arrangements for DTE Energy: March 31, 2022 December 31, 2021 (In millions) Cash collateral netted against Derivative assets $ (225) $ (90) Cash collateral netted against Derivative liabilities 143 48 Cash collateral recorded in Accounts receivable (a) 36 55 Cash collateral recorded in Accounts payable (a) (16) (21) Total net cash collateral posted (received) $ (62) $ (8) _______________________________________ (a) Amounts are recorded net by counterparty. The following table presents the netting offsets of Derivative assets and liabilities for DTE Energy: March 31, 2022 December 31, 2021 Gross Amounts of Recognized Assets (Liabilities) Gross Amounts Offset in the Consolidated Statements of Financial Position Net Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position Gross Amounts of Recognized Assets (Liabilities) Gross Amounts Offset in the Consolidated Statements of Financial Position Net Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position (In millions) Derivative assets Commodity contracts Natural gas $ 711 $ (679) $ 32 $ 454 $ (394) $ 60 Electricity 1,334 (905) 429 643 (441) 202 Environmental & Other 332 (327) 5 294 (285) 9 Total derivative assets $ 2,377 $ (1,911) $ 466 $ 1,391 $ (1,120) $ 271 Derivative liabilities Commodity contracts Natural gas $ (905) $ 553 $ (352) $ (594) $ 347 $ (247) Electricity (1,325) 950 (375) (622) 443 (179) Environmental & Other (326) 326 — (288) 288 — Foreign currency exchange contracts (6) — (6) (4) — (4) Total derivative liabilities $ (2,562) $ 1,829 $ (733) $ (1,508) $ 1,078 $ (430)
Netting Offsets of Derivative Assets and Liabilities Reconciliation to the Statements of Financial Position	The following table presents the netting offsets of Derivative assets and liabilities showing the reconciliation of derivative instruments to DTE Energy's Consolidated Statements of Financial Position: March 31, 2022 December 31, 2021 Derivative Assets Derivative Liabilities Derivative Assets Derivative Liabilities Current Noncurrent Current Noncurrent Current Noncurrent Current Noncurrent (In millions) Total fair value of derivatives $ 1,876 $ 501 $ (1,868) $ (694) $ 1,035 $ 356 $ (1,037) $ (471) Counterparty netting (1,335) (351) 1,335 351 (791) (239) 791 239 Collateral adjustment (189) (36) 80 63 (63) (27) 8 40 Total derivatives as reported $ 352 $ 114 $ (453) $ (280) $ 181 $ 90 $ (238) $ (192)
Gain (Loss) Recognized in Income on Derivatives	The effect of derivatives not designated as hedging instruments on DTE Energy's Consolidated Statements of Operations is as follows: Location of Gain (Loss) Recognized in Income on Derivatives Gain (Loss) Recognized in Income on Derivatives for the Three Months Ended March 31, 2022 2021 (In millions) Commodity contracts Natural gas Operating Revenues — Non-utility operations $ (231) $ (43) Natural gas Fuel, purchased power, gas, and other — non-utility 65 (55) Electricity Operating Revenues — Non-utility operations 2 33 Environmental & Other Operating Revenues — Non-utility operations (4) (32) Foreign currency exchange contracts Operating Revenues — Non-utility operations (2) (2) Total $ (170) $ (99)
Volume of Commodity Contracts	The following represents the cumulative gross volume of DTE Energy's derivative contracts outstanding as of March 31, 2022: Commodity Number of Units Natural gas (MMBtu) 2,174,656,330 Electricity (MWh) 38,329,637 Oil (Gallons) 10,428,000 Foreign currency exchange ($ CAD) 116,900,803 Renewable Energy Certificates (MWh) 9,346,692 Carbon emissions (Metric Tons) 1,355,694

Long-Term Debt (Tables)

Long-Term Debt (Tables)	3 Months Ended
	Mar. 31, 2022
Debt Disclosure [Abstract]
Schedule of Debt Issuances	In 2022, the following debt was issued: Company Month Type Interest Rate Maturity Date Amount (In millions) DTE Electric February Mortgage bonds (a) 3.00% 2032 $ 500 DTE Electric February Mortgage bonds (b) 3.65% 2052 400 DTE Electric March Securitization bonds (c) 2.64% 2027 (d) 184 DTE Electric March Securitization bonds (c) 3.11% 2036 (e) 52 $ 1,136 _______________________________________ (a) Proceeds used for the repayment of short-term borrowings, for capital expenditures, and for other general corporate purposes. (b) Bonds were issued as Green Bonds with proceeds to be used for eligible green expenditures, including costs related to the generation of solar and wind energy, purchases of renewable energy from wind and solar power facilities, and energy optimization programs. (c) Proceeds were used to reimburse DTE Electric for qualified costs previously incurred, including the net book value of the River Rouge generation plant, tree trimming surge program costs, and other qualified costs. The securitization financing order from the MPSC required that the net proceeds be subsequently applied by DTE Electric to retire existing debt or equity. Accordingly, DTE Electric used proceeds of $115 million towards retirement of the 2012 Series A Mortgage bonds noted in the Debt Redemptions table below and issued a one-time special dividend of $115 million to DTE Energy. Refer to Note 6 to the Consolidated Financial Statements, “Regulatory Matters,” for additional information (d) Principal payments on the bonds will be made semi-annually beginning December 2022, with the final payment scheduled for December 2026. (e) Principal payments on the bonds will be made semi-annually beginning June 2027, with the final payment scheduled for December 2035.
Schedule of Debt Redemptions	In 2022, the following debt was redeemed: Company Month Type Interest Rate Maturity Date Amount (In millions) DTE Electric March Mortgage bonds 2.65% 2022 $ 250 $ 250

Short-Term Credit Arrangement_2

Short-Term Credit Arrangements and Borrowings (Tables)	3 Months Ended
	Mar. 31, 2022
Short-term Debt [Abstract]
Schedule of Line of Credit Facilities	The availability under these facilities as of March 31, 2022 is shown in the following table: DTE Energy DTE Electric DTE Gas Total (In millions) Unsecured revolving credit facility, expiring April 2025 (a) $ 1,500 $ 500 $ 300 $ 2,300 Unsecured term loan (b) 400 — — 400 Unsecured Canadian revolving credit facility, expiring May 2023 88 — — 88 Unsecured letter of credit facility, expiring February 2023 150 — — 150 Unsecured letter of credit facility, expiring July 2023 70 — — 70 Unsecured letter of credit facility (c) 50 — — 50 2,258 500 300 3,058 Amounts outstanding at March 31, 2022 Revolver borrowings 83 — — 83 Commercial paper issuances 161 — — 161 Letters of credit 288 — — 288 532 — — 532 Net availability at March 31, 2022 $ 1,726 $ 500 $ 300 $ 2,526 _______________________________________ (a) Total availability of $102 million expires in April 2024, including $67 million at DTE Energy, $22 million at DTE Electric, and $13 million at DTE Gas. All other availability expires in April 2025. (b) Term loan initially scheduled to expire June 2022 was terminated in April 2022. (c) Uncommitted letter of credit facility with automatic renewal provision for each July and therefore no expiration.

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2022
Leases [Abstract]
Components of Net Investment in Finance Leases	The components of DTE Energy’s net investment in finance leases for remaining periods were as follows: DTE Energy March 31, 2022 (In millions) 2022 $ 19 2023 26 2024 27 2025 27 2026 26 2027 and Thereafter 335 Total minimum future lease receipts 460 Residual value of leased pipeline 17 Less unearned income 248 Net investment in finance lease 229 Less current portion 6 $ 223
Schedule of Lease Income Associated with Operating Leases	DTE Energy’s lease income associated with operating leases, including the line items in which it was included on the Consolidated Statements of Operations, was as follows: Three Months Ended March 31, 2022 2021 (In millions) Fixed payments $ 4 $ 14 Variable payments 16 17 $ 20 $ 31 Operating revenues $ 20 $ 21 Other income — 10 $ 20 $ 31

Retirement Benefits and Trust_2

Retirement Benefits and Trusteed Assets (Tables)	3 Months Ended
	Mar. 31, 2022
Retirement Benefits [Abstract]
Schedule of Net Periodic Benefit Costs (Credits)	The following tables detail the components of net periodic benefit costs (credits) for pension benefits and other postretirement benefits for DTE Energy: Pension Benefits Other Postretirement Benefits Three Months Ended March 31, 2022 2021 2022 2021 (In millions) Service cost $ 24 $ 27 $ 7 $ 8 Interest cost 41 39 12 11 Expected return on plan assets (87) (84) (32) (32) Amortization of: Net actuarial loss 29 49 1 3 Prior service credit — — (5) (5) Net periodic benefit cost (credit) $ 7 $ 31 $ (17) $ (15) The following tables detail the components of net periodic benefit costs (credits) for other postretirement benefits for DTE Electric: Three Months Ended March 31, 2022 2021 (In millions) Service cost $ 5 $ 6 Interest cost 9 8 Expected return on plan assets (21) (22) Amortization of: Net actuarial loss 1 3 Prior service credit (3) (3) Net periodic benefit credit $ (9) $ (8)

Segment and Related Informati_2

Segment and Related Information (Tables)	3 Months Ended
	Mar. 31, 2022
Segment Reporting [Abstract]
Financial Data of Business Segments	Inter-segment billing for goods and services exchanged between segments is based upon tariffed or market-based prices of the provider and primarily consists of power sales, natural gas sales, and renewable natural gas sales in the segments below. For the prior period, inter-segment billing also included the sale of reduced emissions fuel at DTE Vantage. Three Months Ended March 31, 2022 2021 (In millions) Electric $ 16 $ 16 Gas 3 4 DTE Vantage 25 162 Energy Trading 17 13 Corporate and Other — 1 $ 61 $ 196 Financial data of DTE Energy's business segments follows: Three Months Ended March 31, 2022 2021 (In millions) Operating Revenues — Utility operations Electric $ 1,486 $ 1,360 Gas 766 612 Operating Revenues — Non-utility operations Electric 4 4 DTE Vantage 179 366 Energy Trading 2,203 1,439 Corporate and Other — 1 Reconciliation and Eliminations (a) (61) (201) Total $ 4,577 $ 3,581 _______________________________________ (a) Includes $5 million for the three months ended March 31, 2021 for eliminations related to DTE Energy's former Gas Storage and Pipelines segment that remain in continuing operations. Eliminations for these revenues are offset by related cost eliminations and have no impact on DTE Energy net income. Three Months Ended March 31, 2022 2021 (In millions) Net Income (Loss) Attributable to DTE Energy by Segment: Electric $ 201 $ 208 Gas 196 169 DTE Vantage 14 28 Energy Trading (9) (55) Corporate and Other (8) (30) Income from Continuing Operations Attributable to DTE Energy Company 394 320 Discontinued Operations — 77 Net Income Attributable to DTE Energy Company $ 394 $ 397

Organization and Basis of Pre_3

Organization and Basis of Presentation (Details Textuals) customer in Millions, $ in Millions	Mar. 31, 2022USD ($)customer
Variable Interest Entity [Line Items]
Number of electric utility customers | customer	2.3
Number of gas utility customers | customer	1.3
Material potential exposure | $	$ 0
DTE Electric
Variable Interest Entity [Line Items]
Material potential exposure | $	$ 0

Organization and Basis of Pre_4

Organization and Basis of Presentation (Consolidated Variable Interest Entities) (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
ASSETS
Cash and cash equivalents	$ 150	$ 28
Restricted cash	6	7
Securitized regulatory assets	229	0
Total Assets	40,360	39,719
LIABILITIES
Short-term borrowings	244	758
DTE Electric
ASSETS
Cash and cash equivalents	49	9
Restricted cash	1	0
Securitized regulatory assets	229	0
Total Assets	28,880	28,405
Variable interest entity, primary beneficiary
ASSETS
Cash and cash equivalents	10	11
Restricted cash	4	6
Securitized regulatory assets	229	0
Notes receivable	80	70
Other current and long-term assets	10	8
Total Assets	333	95
LIABILITIES
Short-term borrowings	82	75
Securitization bonds	230	0
Other current and long-term liabilities	7	5
Total liabilities	319	$ 80
Current portion of securitization bonds	21
Variable interest entity, primary beneficiary | DTE Electric
ASSETS
Cash and cash equivalents	0
Restricted cash	1
Securitized regulatory assets	229
Notes receivable	0
Other current and long-term assets	2
Total Assets	232
LIABILITIES
Short-term borrowings	0
Securitization bonds	230
Other current and long-term liabilities	1
Total liabilities	231
Current portion of securitization bonds	$ 21

Organization and Basis of Pre_5

Organization and Basis of Presentation (Non-Consolidated Variable Interest Entities) (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Investments in equity method investees	$ 174	$ 187
Notes receivable	319	310
Variable interest entity, non-consolidated
Variable Interest Entity [Line Items]
Investments in equity method investees	157	172
Notes receivable	13	13
Future funding commitments	$ 3	$ 3

Significant Accounting Polici_4

Significant Accounting Policies (Other Income) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Schedule of Other Nonoperating Income, by Component [Line Items]
Allowance for equity funds used during construction	$ 8	$ 7
Contract services	7	8
Income from REF entities	0	24
Gains from rabbi trust securities	0	2
Equity earnings (losses) of equity method investees	(11)	1
Other	4	1
Total other income	8	43
DTE Electric
Schedule of Other Nonoperating Income, by Component [Line Items]
Allowance for equity funds used during construction	7	6
Contract services	7	8
Gains from rabbi trust securities	0	2
Other	2	3
Total other income	$ 16	$ 19

Significant Accounting Polici_5

Significant Accounting Policies (Income Taxes) (Details)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Schedule of Income Taxes [Line Items]
Effective Tax Rate	4.00%	(2.00%)
DTE Electric
Schedule of Income Taxes [Line Items]
Effective Tax Rate	2.00%	9.00%

Significant Accounting Polici_6

Significant Accounting Policies (Details Textuals) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Significant Accounting Policies [Line Items]
Effective tax rate increase (decrease)	6.00%
Effective tax rate increase due to annual production tax credits	8.00%
Effective tax rate decrease due to amortization of TCJA regulatory liability	2.00%
Unrecognized compensation cost	$ 109
Recognition period (in years)	1 year 9 months 18 days
Specific review of probable future collections based on receivable balances, threshold duration	30 days
Past due
Significant Accounting Policies [Line Items]
Financing receivables	$ 0
Notes receivable
Significant Accounting Policies [Line Items]
Financing receivables	$ 127
Notes receivable | Minimum
Significant Accounting Policies [Line Items]
Number of days after which receivable is considered delinquent	60 days
Notes receivable | Maximum
Significant Accounting Policies [Line Items]
Number of days after which receivable is considered delinquent	120 days
DTE Electric and DTE Gas
Significant Accounting Policies [Line Items]
Threshold period past due for write-off of trade accounts receivable	150 days
DTE Electric and DTE Gas | Accounts receivable
Significant Accounting Policies [Line Items]
Number of days after which receivable is considered delinquent	21 days
DTE Electric
Significant Accounting Policies [Line Items]
Effective tax rate increase (decrease)	(7.00%)
DTE Electric | Notes receivable
Significant Accounting Policies [Line Items]
Financing receivables	$ 17
DTE Electric | DTE Energy
Significant Accounting Policies [Line Items]
Income tax receivable	28		$ 33
Income tax payable			$ 2
Allocated costs	$ 12	$ 14

Significant Accounting Polici_7

Significant Accounting Policies (Financing Receivables Classified by Internal Grade of Credit Risk) (Details) $ in Millions	Mar. 31, 2022USD ($)
Notes receivable
Financing Receivable, Credit Quality Indicator [Line Items]
2022	$ 1
2021	16
2020 and Prior	110
Total	127
Notes receivable | DTE Electric
Financing Receivable, Credit Quality Indicator [Line Items]
Total	17
Notes receivable | Internal grade 1
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	0
2020 and Prior	19
Total	19
Notes receivable | Internal grade 1 | DTE Electric
Financing Receivable, Credit Quality Indicator [Line Items]
Total	14
Notes receivable | Internal grade 2
Financing Receivable, Credit Quality Indicator [Line Items]
2022	1
2021	16
2020 and Prior	91
Total	108
Notes receivable | Internal grade 2 | DTE Electric
Financing Receivable, Credit Quality Indicator [Line Items]
Total	3
Net investment in leases
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	0
2020 and Prior	229
Total	229
Net investment in leases | DTE Electric
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0
Net investment in leases | Internal grade 1
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	0
2020 and Prior	38
Total	38
Net investment in leases | Internal grade 1 | DTE Electric
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0
Net investment in leases | Internal grade 2
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	0
2020 and Prior	191
Total	191
Net investment in leases | Internal grade 2 | DTE Electric
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 0

Significant Accounting Polici_8

Significant Accounting Policies (Roll-Forward of Activity for Financing Receivables Credit Loss Reserves) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 92	$ 104
Current period provision	20	54
Write-offs charged against allowance	(25)	(127)
Recoveries of amounts previously written off	13	61
Ending balance	100	92
DTE Electric
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	54	57
Current period provision	8	36
Write-offs charged against allowance	(18)	(77)
Recoveries of amounts previously written off	9	38
Ending balance	53	54
Trade accounts receivable
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	89	101
Current period provision	20	53
Write-offs charged against allowance	(25)	(126)
Recoveries of amounts previously written off	13	61
Ending balance	97	89
Other receivables
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	3	3
Current period provision	0	1
Write-offs charged against allowance	0	(1)
Recoveries of amounts previously written off	0	0
Ending balance	$ 3	$ 3

Significant Accounting Polici_9

Significant Accounting Policies (Uncollectible Expense) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Uncollectible expense	$ 20	$ 31
DTE Electric
Accounts, Notes, Loans and Financing Receivable [Line Items]
Uncollectible expense	$ 8	$ 11

Discontinued Operations (Financ

Discontinued Operations (Financial Results That Have Been Reclassified from Continuing Operations and Included in Discontinued Operations) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Other (Income) and Deductions
Net Income from Discontinued Operations, Net of Taxes	$ 0	$ 80
Less: Net Income Attributable to Noncontrolling Interests	0	3
Net Income from Discontinued Operations	$ 0	77
Transaction costs		10
DT Midstream | Discontinued operations, spinoff
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating Revenues — Non-utility operations		197
Operating Expenses
Cost of gas and other — non-utility		5
Operation and maintenance		41
Depreciation and amortization		41
Taxes other than income		7
Asset (gains) losses and impairments, net		(1)
Operating Expenses		93
Operating Income		104
Other (Income) and Deductions
Interest expense		26
Interest income		(3)
Other income		(33)
Other (Income) and Deductions		(10)
Income from Discontinued Operations Before Income Taxes		114
Income Tax Expense		34
Net Income from Discontinued Operations, Net of Taxes		80
Less: Net Income Attributable to Noncontrolling Interests		3
Net Income from Discontinued Operations		$ 77

Discontinued Operations (Signif

Discontinued Operations (Significant Non-cash Items and Capital Expenditures) (Details) - DT Midstream - Discontinued operations, spinoff $ in Millions	3 Months Ended
	Mar. 31, 2021USD ($)
Operating Activities
Depreciation and amortization	$ 41
Deferred income taxes	33
Equity earnings of equity method investees	(31)
Investing Activities
Plant and equipment expenditures — non-utility	$ (27)

Revenue (Disaggregation of Reve

Revenue (Disaggregation of Revenue By Segment) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Revenues	$ 4,577	$ 3,581
Electric
Disaggregation of Revenue [Line Items]
Revenues	1,490	1,364
Electric | Residential
Disaggregation of Revenue [Line Items]
Revenues	700	672
Electric | Commercial
Disaggregation of Revenue [Line Items]
Revenues	477	451
Electric | Industrial
Disaggregation of Revenue [Line Items]
Revenues	161	159
Electric | Other
Disaggregation of Revenue [Line Items]
Revenues	152	82
Electric | Other | DTE Sustainable Generation
Disaggregation of Revenue [Line Items]
Revenues	4	4
Gas
Disaggregation of Revenue [Line Items]
Revenues	766	612
Gas | Other
Disaggregation of Revenue [Line Items]
Revenues	43	40
Gas | Gas sales
Disaggregation of Revenue [Line Items]
Revenues	596	461
Gas | End User Transportation
Disaggregation of Revenue [Line Items]
Revenues	98	85
Gas | Intermediate Transportation
Disaggregation of Revenue [Line Items]
Revenues	29	26
DTE Vantage
Disaggregation of Revenue [Line Items]
Revenues	179	366
Energy Trading
Disaggregation of Revenue [Line Items]
Revenues	$ 2,203	$ 1,439

Revenue (Revenues Outside the S

Revenue (Revenues Outside the Scope of Topic 606) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Leases	$ 20	$ 31
Electric
Disaggregation of Revenue [Line Items]
Other revenues	4	3
Gas
Disaggregation of Revenue [Line Items]
Other revenues	2	2
DTE Vantage
Disaggregation of Revenue [Line Items]
Leases	20	21
Energy Trading
Disaggregation of Revenue [Line Items]
Derivatives	$ 1,734	$ 1,146

Revenue (Deferred Revenue Activ

Revenue (Deferred Revenue Activity) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2022USD ($)
Contract Liability [Roll Forward]
Beginning Balance	$ 78
Increases due to cash received or receivable, excluding amounts recognized as revenue during the period	27
Revenue recognized that was included in the deferred revenue balance at the beginning of the period	(26)
Ending Balance	$ 79

Revenue (Expected Recognition o

Revenue (Expected Recognition of Deferred Revenue) (Details) $ in Millions	Mar. 31, 2022USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 79
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 68
Remaining performance obligation, expected timing of satisfaction	9 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 8
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 1
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 0
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 0
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 2
Remaining performance obligation, expected timing of satisfaction

Revenue (Expected Timing of Per

Revenue (Expected Timing of Performance Obligation Satisfaction) (Details) $ in Millions	Mar. 31, 2022USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 79
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 68
Remaining performance obligation, expected timing of satisfaction	9 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 8
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 1
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 0
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 0
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 2
Remaining performance obligation, expected timing of satisfaction
Fixed-price Contract
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 1,231
Fixed-price Contract | DTE Electric
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	21
Fixed-price Contract | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 218
Remaining performance obligation, expected timing of satisfaction	9 months
Fixed-price Contract | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01 | DTE Electric
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 6
Remaining performance obligation, expected timing of satisfaction	9 months
Fixed-price Contract | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 296
Remaining performance obligation, expected timing of satisfaction	1 year
Fixed-price Contract | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 | DTE Electric
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 7
Remaining performance obligation, expected timing of satisfaction	1 year
Fixed-price Contract | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 183
Remaining performance obligation, expected timing of satisfaction	1 year
Fixed-price Contract | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | DTE Electric
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 7
Remaining performance obligation, expected timing of satisfaction	1 year
Fixed-price Contract | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 106
Remaining performance obligation, expected timing of satisfaction	1 year
Fixed-price Contract | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | DTE Electric
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 1
Remaining performance obligation, expected timing of satisfaction	1 year
Fixed-price Contract | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 63
Remaining performance obligation, expected timing of satisfaction	1 year
Fixed-price Contract | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 | DTE Electric
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 0
Remaining performance obligation, expected timing of satisfaction	1 year
Fixed-price Contract | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 365
Remaining performance obligation, expected timing of satisfaction
Fixed-price Contract | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 | DTE Electric
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 0
Remaining performance obligation, expected timing of satisfaction

Regulatory Matters (Details Tex

Regulatory Matters (Details Textuals) - USD ($) $ in Millions	Mar. 17, 2022	Jan. 21, 2022	Mar. 31, 2022	Jun. 23, 2021
Public Utilities, General Disclosures [Line Items]
Long-term debt issued			$ 1,136
DTE Electric
Public Utilities, General Disclosures [Line Items]
Securitized regulatory assets	$ 230
DTE Electric | Tree trimming | Maximum
Public Utilities, General Disclosures [Line Items]
Amortization period for regulatory asset	5 years
DTE Electric | River Rouge | Maximum
Public Utilities, General Disclosures [Line Items]
Amortization period for regulatory asset	14 years
DTE Electric | Securitization Bonds
Public Utilities, General Disclosures [Line Items]
Long-term debt issued	$ 236
DTE Electric | MPSC
Public Utilities, General Disclosures [Line Items]
Authorized issuance of securitization bonds of qualified costs, maximum				$ 236
DTE Electric | MPSC | 2022 Electric Rate Case Filing
Public Utilities, General Disclosures [Line Items]
Requested rate increase		$ 388
Return on equity percent		9.90%
Return on equity requested percent		10.25%
DTE Electric | MPSC | Net book value of River Rouge generation plant
Public Utilities, General Disclosures [Line Items]
Authorized issuance of securitization bonds of qualified costs, maximum				73
DTE Electric | MPSC | Tree trimming surge program costs
Public Utilities, General Disclosures [Line Items]
Authorized issuance of securitization bonds of qualified costs, maximum				157
DTE Electric | MPSC | Other
Public Utilities, General Disclosures [Line Items]
Authorized issuance of securitization bonds of qualified costs, maximum				$ 6

Earnings Per Share (Basic and D

Earnings Per Share (Basic and Diluted Income Per Share Calculation) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Basic Earnings per Share
Net Income Attributable to DTE Energy Company — continuing operations	$ 394	$ 320
Less: Allocation of earnings to net restricted stock awards	1	0
Net income from continuing operations available to common shareholders — basic	393	320
Net Income Attributable to DTE Energy Company — discontinued operations	0	77
Net income available to common shareholders — basic	$ 393	$ 397
Average number of common shares outstanding — basic (in shares)	193	194
Income from continuing operations (in dollars per share)	$ 2.03	$ 1.65
Income from discontinued operations (in dollars per share)	0	0.40
Basic Earnings per Common Share (in dollars per share)	$ 2.03	$ 2.05
Diluted Earnings per Share
Net Income Attributable to DTE Energy Company — continuing operations	$ 394	$ 320
Less: Allocation of earnings to net restricted stock awards	1	0
Net income from continuing operations available to common shareholders — diluted	393	320
Net Income Attributable to DTE Energy Company — discontinued operations	0	77
Net income available to common shareholders — diluted	$ 393	$ 397
Average number of common shares outstanding — basic (in shares)	193	194
Average dilutive equity units and performance share awards (in shares)	1	0
Average number of common shares outstanding — diluted (in shares)	194	194
Income from continuing operations (in dollars per share)	$ 2.03	$ 1.65
Income from discontinued operations (in dollars per share)	0	0.40
Diluted Earnings per Common Share (in dollars per share)	$ 2.03	$ 2.05
Antidilutive securities excluded from computation of earnings per share (in shares)	10.7	10.3

Fair Value (Assets and Liabilit

Fair Value (Assets and Liabilities Recorded at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Derivative assets
Derivative assets, gross	$ 2,377	$ 1,391
Derivative asset, netting	(1,911)	(1,120)
Derivative assets, net	466	271
Derivative liabilities
Derivative liabilities, gross	(2,562)	(1,508)
Derivative liability, netting	1,829	1,078
Derivative liabilities, net	(733)	(430)
DTE Electric
Assets
Nuclear decommissioning trusts	2,010	2,071
Current liabilities
Derivative liabilities
Derivative liabilities, gross	(1,868)	(1,037)
Noncurrent liabilities
Derivative liabilities
Derivative liabilities, gross	(694)	(471)
Natural gas
Derivative assets
Derivative assets, gross	711	454
Derivative asset, netting	(679)	(394)
Derivative assets, net	32	60
Derivative liabilities
Derivative liabilities, gross	(905)	(594)
Derivative liability, netting	553	347
Derivative liabilities, net	(352)	(247)
Electricity
Derivative assets
Derivative assets, gross	1,334	643
Derivative asset, netting	(905)	(441)
Derivative assets, net	429	202
Derivative liabilities
Derivative liabilities, gross	(1,325)	(622)
Derivative liability, netting	950	443
Derivative liabilities, net	(375)	(179)
Environmental & Other
Derivative assets
Derivative assets, gross	332	294
Derivative asset, netting	(327)	(285)
Derivative assets, net	5	9
Derivative liabilities
Derivative liabilities, gross	(326)	(288)
Derivative liability, netting	326	288
Derivative liabilities, net	0	0
Foreign currency exchange contracts
Derivative liabilities
Derivative liabilities, gross	(6)	(4)
Derivative liability, netting	0	0
Derivative liabilities, net	(6)	(4)
Cash equivalents | DTE Electric
Assets
Nuclear decommissioning trusts	37	39
Private equity and other | DTE Electric
Assets
Nuclear decommissioning trusts	236	205
Hedge funds and similar investments | DTE Electric
Assets
Nuclear decommissioning trusts	95	76
Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	1,033	1,107
Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	609	644
Recurring
Assets
Cash equivalents	123	4
Derivative assets
Derivative asset, netting	(1,911)	(1,120)
Derivative assets, net	466	271
Total assets	2,742	2,507
Derivative liabilities
Derivative liability, netting	1,829	1,078
Derivative liabilities, net	(733)	(430)
Net Assets (Liabilities) at end of period	2,009	2,077
Net Assets at end of period, netting	(82)	(42)
Recurring | DTE Electric
Assets
Cash equivalents	38	0
Derivative assets
Total assets	2,082	2,111
Recurring | Current assets
Derivative assets
Derivative asset, netting	(1,524)	(854)
Total assets	475	185
Recurring | Current assets | DTE Electric
Derivative assets
Total assets	41	9
Recurring | Noncurrent assets
Derivative assets
Derivative asset, netting	(387)	(266)
Total assets	2,267	2,322
Recurring | Noncurrent assets | DTE Electric
Derivative assets
Total assets	2,041	2,102
Recurring | Current liabilities
Derivative liabilities
Derivative liability, netting	1,415	799
Derivative liabilities, net	(453)	(238)
Recurring | Noncurrent liabilities
Derivative liabilities
Derivative liability, netting	414	279
Derivative liabilities, net	(280)	(192)
Recurring | Restricted cash
Assets
Cash equivalents	3	1
Recurring | Restricted cash | DTE Electric
Assets
Cash equivalents	1
Recurring | Natural gas
Derivative assets
Derivative asset, netting	(679)	(394)
Derivative assets, net	32	60
Derivative liabilities
Derivative liability, netting	553	347
Derivative liabilities, net	(352)	(247)
Recurring | Electricity
Derivative assets
Derivative asset, netting	(905)	(441)
Derivative assets, net	429	202
Derivative liabilities
Derivative liability, netting	950	443
Derivative liabilities, net	(375)	(179)
Recurring | Environmental & Other
Derivative assets
Derivative asset, netting	(327)	(285)
Derivative assets, net	5	9
Derivative liabilities
Derivative liability, netting	326	288
Derivative liabilities, net	0	0
Recurring | Foreign currency exchange contracts
Derivative liabilities
Derivative liability, netting	0	0
Derivative liabilities, net	(6)	(4)
Recurring | Derivative assets — FTRs | DTE Electric
Derivative assets
Derivative assets, net	3	9
Recurring | Cash equivalents
Assets
Nuclear decommissioning trusts	37	39
Other investments	71	86
Recurring | Cash equivalents | DTE Electric
Assets
Nuclear decommissioning trusts	37	39
Other investments	11	11
Recurring | Private equity and other
Assets
Nuclear decommissioning trusts	236	205
Recurring | Private equity and other | DTE Electric
Assets
Nuclear decommissioning trusts	236	205
Recurring | Hedge funds and similar investments
Assets
Nuclear decommissioning trusts	95	76
Recurring | Hedge funds and similar investments | DTE Electric
Assets
Nuclear decommissioning trusts	95	76
Recurring | Equity securities
Assets
Nuclear decommissioning trusts	1,033	1,107
Other investments	65	68
Recurring | Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	1,033	1,107
Other investments	20	20
Recurring | Fixed income securities
Assets
Nuclear decommissioning trusts	609	644
Other investments	7	7
Recurring | Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	609	644
Recurring | Level 1
Assets
Cash equivalents	123	4
Derivative assets
Derivative assets, gross	505	273
Total assets	1,836	1,576
Derivative liabilities
Derivative liabilities, gross	(232)	(177)
Net Assets (Liabilities) at end of period	1,604	1,399
Recurring | Level 1 | DTE Electric
Assets
Cash equivalents	38	0
Derivative assets
Total assets	1,134	1,169
Recurring | Level 1 | Current assets
Derivative assets
Total assets	532	227
Recurring | Level 1 | Current assets | DTE Electric
Derivative assets
Total assets	38	0
Recurring | Level 1 | Noncurrent assets
Derivative assets
Total assets	1,304	1,349
Recurring | Level 1 | Noncurrent assets | DTE Electric
Derivative assets
Total assets	1,096	1,169
Recurring | Level 1 | Current liabilities
Derivative liabilities
Derivative liabilities, gross	(218)	(168)
Recurring | Level 1 | Noncurrent liabilities
Derivative liabilities
Derivative liabilities, gross	(14)	(9)
Recurring | Level 1 | Natural gas
Derivative assets
Derivative assets, gross	505	273
Derivative liabilities
Derivative liabilities, gross	(232)	(177)
Recurring | Level 1 | Electricity
Derivative assets
Derivative assets, gross	0	0
Derivative liabilities
Derivative liabilities, gross	0	0
Recurring | Level 1 | Environmental & Other
Derivative assets
Derivative assets, gross	0	0
Derivative liabilities
Derivative liabilities, gross	0	0
Recurring | Level 1 | Foreign currency exchange contracts
Derivative liabilities
Derivative liabilities, gross	0	0
Recurring | Level 1 | Derivative assets — FTRs | DTE Electric
Derivative assets
Derivative assets, net	0	0
Recurring | Level 1 | Cash equivalents
Assets
Nuclear decommissioning trusts	37	39
Other investments	71	86
Recurring | Level 1 | Cash equivalents | DTE Electric
Assets
Nuclear decommissioning trusts	37	39
Other investments	11	11
Recurring | Level 1 | Private equity and other
Assets
Nuclear decommissioning trusts	0	0
Recurring | Level 1 | Private equity and other | DTE Electric
Assets
Nuclear decommissioning trusts	0	0
Recurring | Level 1 | Hedge funds and similar investments
Assets
Nuclear decommissioning trusts	65	58
Recurring | Level 1 | Hedge funds and similar investments | DTE Electric
Assets
Nuclear decommissioning trusts	65	58
Recurring | Level 1 | Equity securities
Assets
Nuclear decommissioning trusts	851	917
Other investments	65	68
Recurring | Level 1 | Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	851	917
Other investments	20	20
Recurring | Level 1 | Fixed income securities
Assets
Nuclear decommissioning trusts	112	124
Other investments	7	7
Recurring | Level 1 | Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	112	124
Recurring | Level 2
Assets
Cash equivalents	0	0
Derivative assets
Derivative assets, gross	1,466	900
Total assets	1,894	1,336
Derivative liabilities
Derivative liabilities, gross	(1,583)	(898)
Net Assets (Liabilities) at end of period	311	438
Recurring | Level 2 | DTE Electric
Assets
Cash equivalents	0	0
Derivative assets
Total assets	428	436
Recurring | Level 2 | Current assets
Derivative assets
Total assets	1,128	646
Recurring | Level 2 | Current assets | DTE Electric
Derivative assets
Total assets	0	0
Recurring | Level 2 | Noncurrent assets
Derivative assets
Total assets	766	690
Recurring | Level 2 | Noncurrent assets | DTE Electric
Derivative assets
Total assets	428	436
Recurring | Level 2 | Current liabilities
Derivative liabilities
Derivative liabilities, gross	(1,165)	(609)
Recurring | Level 2 | Noncurrent liabilities
Derivative liabilities
Derivative liabilities, gross	(418)	(289)
Recurring | Level 2 | Natural gas
Derivative assets
Derivative assets, gross	135	115
Derivative liabilities
Derivative liabilities, gross	(372)	(172)
Recurring | Level 2 | Electricity
Derivative assets
Derivative assets, gross	1,006	500
Derivative liabilities
Derivative liabilities, gross	(880)	(434)
Recurring | Level 2 | Environmental & Other
Derivative assets
Derivative assets, gross	325	285
Derivative liabilities
Derivative liabilities, gross	(325)	(288)
Recurring | Level 2 | Foreign currency exchange contracts
Derivative liabilities
Derivative liabilities, gross	(6)	(4)
Recurring | Level 2 | Derivative assets — FTRs | DTE Electric
Derivative assets
Derivative assets, net	0	0
Recurring | Level 2 | Cash equivalents
Assets
Nuclear decommissioning trusts	0	0
Other investments	0	0
Recurring | Level 2 | Cash equivalents | DTE Electric
Assets
Nuclear decommissioning trusts	0	0
Other investments	0	0
Recurring | Level 2 | Private equity and other
Assets
Nuclear decommissioning trusts	0	0
Recurring | Level 2 | Private equity and other | DTE Electric
Assets
Nuclear decommissioning trusts	0	0
Recurring | Level 2 | Hedge funds and similar investments
Assets
Nuclear decommissioning trusts	30	18
Recurring | Level 2 | Hedge funds and similar investments | DTE Electric
Assets
Nuclear decommissioning trusts	30	18
Recurring | Level 2 | Equity securities
Assets
Nuclear decommissioning trusts	0	0
Other investments	0	0
Recurring | Level 2 | Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	0	0
Other investments	0	0
Recurring | Level 2 | Fixed income securities
Assets
Nuclear decommissioning trusts	398	418
Other investments	0	0
Recurring | Level 2 | Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	398	418
Recurring | Level 3
Assets
Cash equivalents	0	0
Derivative assets
Derivative assets, gross	406	218
Total assets	406	218
Derivative liabilities
Derivative liabilities, gross	(747)	(433)
Net Assets (Liabilities) at end of period	(341)	(215)
Recurring | Level 3 | DTE Electric
Assets
Cash equivalents	0	0
Derivative assets
Total assets	3	9
Recurring | Level 3 | Current assets
Derivative assets
Total assets	339	166
Recurring | Level 3 | Current assets | DTE Electric
Derivative assets
Total assets	3	9
Recurring | Level 3 | Noncurrent assets
Derivative assets
Total assets	67	52
Recurring | Level 3 | Noncurrent assets | DTE Electric
Derivative assets
Total assets	0	0
Recurring | Level 3 | Current liabilities
Derivative liabilities
Derivative liabilities, gross	(485)	(260)
Recurring | Level 3 | Noncurrent liabilities
Derivative liabilities
Derivative liabilities, gross	(262)	(173)
Recurring | Level 3 | Natural gas
Derivative assets
Derivative assets, gross	71	66
Derivative liabilities
Derivative liabilities, gross	(301)	(245)
Recurring | Level 3 | Electricity
Derivative assets
Derivative assets, gross	328	143
Derivative liabilities
Derivative liabilities, gross	(445)	(188)
Recurring | Level 3 | Environmental & Other
Derivative assets
Derivative assets, gross	7	9
Derivative liabilities
Derivative liabilities, gross	(1)	0
Recurring | Level 3 | Foreign currency exchange contracts
Derivative liabilities
Derivative liabilities, gross	0
Recurring | Level 3 | Derivative assets — FTRs | DTE Electric
Derivative assets
Derivative assets, net	3	9
Recurring | Level 3 | Cash equivalents
Assets
Nuclear decommissioning trusts	0	0
Other investments	0	0
Recurring | Level 3 | Cash equivalents | DTE Electric
Assets
Nuclear decommissioning trusts	0	0
Other investments	0	0
Recurring | Level 3 | Private equity and other
Assets
Nuclear decommissioning trusts	0	0
Recurring | Level 3 | Private equity and other | DTE Electric
Assets
Nuclear decommissioning trusts	0	0
Recurring | Level 3 | Hedge funds and similar investments
Assets
Nuclear decommissioning trusts	0	0
Recurring | Level 3 | Hedge funds and similar investments | DTE Electric
Assets
Nuclear decommissioning trusts	0	0
Recurring | Level 3 | Equity securities
Assets
Nuclear decommissioning trusts	0	0
Other investments	0	0
Recurring | Level 3 | Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	0	0
Other investments	0	0
Recurring | Level 3 | Fixed income securities
Assets
Nuclear decommissioning trusts	0	0
Other investments	0	0
Recurring | Level 3 | Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	0	0
Recurring | Other
Derivative assets
Total assets	517	497
Derivative liabilities
Net Assets (Liabilities) at end of period	517	497
Recurring | Other | DTE Electric
Derivative assets
Total assets	517	497
Recurring | Other | Noncurrent assets
Derivative assets
Total assets	517	497
Recurring | Other | Noncurrent assets | DTE Electric
Derivative assets
Total assets	517	497
Recurring | Other | Private equity and other
Assets
Nuclear decommissioning trusts	236	205
Recurring | Other | Private equity and other | DTE Electric
Assets
Nuclear decommissioning trusts	236	205
Recurring | Other | Equity securities
Assets
Nuclear decommissioning trusts	182	190
Recurring | Other | Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	182	190
Recurring | Other | Fixed income securities
Assets
Nuclear decommissioning trusts	99	102
Recurring | Other | Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	$ 99	$ 102

Fair Value (Details Textuals)

Fair Value (Details Textuals) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Nuclear decommissioning trust fund | Fixed income securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities with no contractual maturity date	$ 99
Equity or debt securities | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, redemption notice period	7 days
Equity or debt securities | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, redemption notice period	65 days
Private equity and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unfunded commitments related to investments classified as NAV assets	$ 192	$ 199
Private equity and other | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments classified as NAV assets, general contractual durations	7 years
Private equity and other | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments classified as NAV assets, general contractual durations	12 years

Fair Value (Reconciliation of L

Fair Value (Reconciliation of Level 3 Assets and Liabilities at Fair Value on a Recurring Basis) (Details) - Recurring - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Assets (Liabilities) as of beginning of period	$ (215)	$ (2)
Transfers from Level 3 into Level 2	5	0
Total gains (losses)
Included in earnings	(218)	(41)
Recorded in Regulatory liabilities	(4)	(1)
Purchases, issuances, and settlements
Settlements	91	(63)
Net Assets (Liabilities) as of end of period	(341)	(107)
Total gains (losses) included in Net Income attributed to the change in unrealized gains (losses) related to assets and liabilities held at end of period	(190)	(100)
DTE Electric
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Assets (Liabilities) as of beginning of period	9	4
Total gains (losses)
Recorded in Regulatory liabilities	(4)	(1)
Purchases, issuances, and settlements
Settlements	(2)	(2)
Net Assets (Liabilities) as of end of period	3	1
Natural gas
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Assets (Liabilities) as of beginning of period	(179)	(16)
Transfers from Level 3 into Level 2	5	0
Total gains (losses)
Included in earnings	(171)	(67)
Recorded in Regulatory liabilities	0	0
Purchases, issuances, and settlements
Settlements	115	(6)
Net Assets (Liabilities) as of end of period	(230)	(89)
Total gains (losses) included in Net Income attributed to the change in unrealized gains (losses) related to assets and liabilities held at end of period	(129)	(93)
Electricity
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Assets (Liabilities) as of beginning of period	(45)	10
Transfers from Level 3 into Level 2	0	0
Total gains (losses)
Included in earnings	(50)	26
Recorded in Regulatory liabilities	0	0
Purchases, issuances, and settlements
Settlements	(22)	(55)
Net Assets (Liabilities) as of end of period	(117)	(19)
Total gains (losses) included in Net Income attributed to the change in unrealized gains (losses) related to assets and liabilities held at end of period	(64)	(7)
Other
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Assets (Liabilities) as of beginning of period	9	4
Transfers from Level 3 into Level 2	0	0
Total gains (losses)
Included in earnings	3	0
Recorded in Regulatory liabilities	(4)	(1)
Purchases, issuances, and settlements
Settlements	(2)	(2)
Net Assets (Liabilities) as of end of period	6	1
Total gains (losses) included in Net Income attributed to the change in unrealized gains (losses) related to assets and liabilities held at end of period	$ 3	$ 0

Fair Value (Unobservable Inputs

Fair Value (Unobservable Inputs related to Level 3 Assets and Liabilities) (Details) $ in Millions	Mar. 31, 2022USD ($)$ / MMBTU$ / MWh	Dec. 31, 2021USD ($)$ / MWh$ / MMBTU
Unobservable Inputs Valuation Techniques [Line Items]
Derivative Assets	$ 2,377	$ 1,391
Derivative Liabilities	(2,562)	(1,508)
Natural gas
Unobservable Inputs Valuation Techniques [Line Items]
Derivative Assets	711	454
Derivative Liabilities	(905)	(594)
Electricity
Unobservable Inputs Valuation Techniques [Line Items]
Derivative Assets	1,334	643
Derivative Liabilities	$ (1,325)	$ (622)
Level 3 | Natural gas | Forward basis price | Minimum | Discounted Cash Flow
Unobservable Inputs Valuation Techniques [Line Items]
Forward basis price | $ / MMBTU	(1.54)	(1.36)
Level 3 | Natural gas | Forward basis price | Maximum | Discounted Cash Flow
Unobservable Inputs Valuation Techniques [Line Items]
Forward basis price | $ / MMBTU	6.46	3.82
Level 3 | Natural gas | Forward basis price | Weighted Average | Discounted Cash Flow
Unobservable Inputs Valuation Techniques [Line Items]
Forward basis price | $ / MMBTU	(0.10)	(0.04)
Level 3 | Electricity | Forward basis price | Minimum | Discounted Cash Flow
Unobservable Inputs Valuation Techniques [Line Items]
Forward basis price | $ / MWh	(12)	(12)
Level 3 | Electricity | Forward basis price | Maximum | Discounted Cash Flow
Unobservable Inputs Valuation Techniques [Line Items]
Forward basis price | $ / MWh	8	7
Level 3 | Electricity | Forward basis price | Weighted Average | Discounted Cash Flow
Unobservable Inputs Valuation Techniques [Line Items]
Forward basis price | $ / MWh	(2)	(2)
Recurring | Level 3
Unobservable Inputs Valuation Techniques [Line Items]
Derivative Assets	$ 406	$ 218
Derivative Liabilities	(747)	(433)
Recurring | Level 3 | Natural gas
Unobservable Inputs Valuation Techniques [Line Items]
Derivative Assets	71	66
Derivative Liabilities	(301)	(245)
Recurring | Level 3 | Electricity
Unobservable Inputs Valuation Techniques [Line Items]
Derivative Assets	328	143
Derivative Liabilities	$ (445)	$ (188)

Fair Value (Fair Value of Finan

Fair Value (Fair Value of Financial Instruments) (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Carrying amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable	$ 127	$ 150
Short-term borrowings	244	758
Notes payable	17	27
Long-term debt	18,249	17,378
Carrying amount | DTE Electric
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable	17	17
Short-term borrowings	0	153
Notes payable	17	27
Long-term debt	9,775	8,907
Carrying amount | DTE Electric | Affiliates
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term borrowings	0	53
Fair value | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable	0	0
Short-term borrowings	0	0
Notes payable	0	0
Long-term debt	2,247	2,284
Fair value | Level 1 | DTE Electric
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable	0	0
Short-term borrowings	0	0
Notes payable	0	0
Long-term debt	0	0
Fair value | Level 1 | DTE Electric | Affiliates
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term borrowings	0	0
Fair value | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable	0	0
Short-term borrowings	244	758
Notes payable	0	0
Long-term debt	15,029	15,425
Fair value | Level 2 | DTE Electric
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable	0	0
Short-term borrowings	0	153
Notes payable	0	0
Long-term debt	9,824	9,898
Fair value | Level 2 | DTE Electric | Affiliates
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term borrowings	0	0
Fair value | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable	140	167
Short-term borrowings	0	0
Notes payable	17	27
Long-term debt	1,163	1,207
Fair value | Level 3 | DTE Electric
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable	17	17
Short-term borrowings	0	0
Notes payable	17	27
Long-term debt	169	150
Fair value | Level 3 | DTE Electric | Affiliates
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term borrowings	$ 0	$ 53

Fair Value (Fair Value of Nucle

Fair Value (Fair Value of Nuclear Decommissioning Trust Fund Assets) (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Nuclear decommissioning trust funds	$ 2,010	$ 2,071
DTE Electric
Debt Securities, Available-for-sale [Line Items]
Nuclear decommissioning trust funds	2,010	2,071
DTE Electric | Nuclear decommissioning trust fund
Debt Securities, Available-for-sale [Line Items]
Nuclear decommissioning trust funds	2,010	2,071
DTE Electric | Nuclear decommissioning trust fund | Fermi 2
Debt Securities, Available-for-sale [Line Items]
Nuclear decommissioning trust funds	1,990	2,051
DTE Electric | Nuclear decommissioning trust fund | Fermi 1
Debt Securities, Available-for-sale [Line Items]
Nuclear decommissioning trust funds	3	3
DTE Electric | Nuclear decommissioning trust fund | Low-level radioactive waste
Debt Securities, Available-for-sale [Line Items]
Nuclear decommissioning trust funds	$ 17	$ 17

Fair Value (Gains and Losses an

Fair Value (Gains and Losses and Proceeds from the Sale of Securities by the Nuclear Decommissioning Trust Funds) (Details) - DTE Electric - Nuclear decommissioning trust fund - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Realized gains	$ 14	$ 24
Realized losses	(5)	(2)
Proceeds from sale of securities	$ 207	$ 271

Fair Value (Fair Value and Unre

Fair Value (Fair Value and Unrealized Gains and Losses for the Nuclear Decommissioning Trust Funds) (Details) - DTE Electric - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Fair Value	$ 2,010	$ 2,071
Unrealized Gains	570	628
Unrealized Losses	(49)	(25)
Cash equivalents
Debt Securities, Available-for-sale [Line Items]
Fair Value	37	39
Unrealized Gains	0	0
Unrealized Losses	0	0
Private equity and other
Debt Securities, Available-for-sale [Line Items]
Fair Value	236	205
Unrealized Gains	70	58
Unrealized Losses	(2)	(8)
Hedge funds and similar investments
Debt Securities, Available-for-sale [Line Items]
Fair Value	95	76
Unrealized Gains	1	1
Unrealized Losses	(4)	(2)
Equity securities
Debt Securities, Available-for-sale [Line Items]
Fair Value	1,033	1,107
Unrealized Gains	488	546
Unrealized Losses	(13)	(9)
Fixed income securities
Debt Securities, Available-for-sale [Line Items]
Fair Value	609	644
Unrealized Gains	11	23
Unrealized Losses	$ (30)	$ (6)

Fair Value (Fair Value of Fixed

Fair Value (Fair Value of Fixed Income Securities Held in Nuclear Decommissioning Trust Funds (Details) - Fixed income securities - Nuclear decommissioning trust fund $ in Millions	Mar. 31, 2022USD ($)
Debt Securities, Available-for-sale [Line Items]
Due within one year	$ 20
Due after one through five years	127
Due after five through ten years	98
Due after ten years	265
Fixed income securities total	$ 510

Fair Value (Gains (Losses) Rela

Fair Value (Gains (Losses) Related to the Trust) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Rabbi Trust
Schedule of Investments [Line Items]
Gains (losses) related to the trust	$ (1)	$ 2
Equity securities
Schedule of Investments [Line Items]
Gains (losses) related to the trust	(1)	2
Fixed income securities
Schedule of Investments [Line Items]
Gains (losses) related to the trust	$ 0	$ 0

Financial and Other Derivativ_3

Financial and Other Derivative Instruments (Fair Value of Derivative Instruments) (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Derivatives, Fair Value [Line Items]
Derivative Assets	$ 2,377	$ 1,391
Derivative Liabilities	(2,562)	(1,508)
Current derivative assets
Derivatives, Fair Value [Line Items]
Derivative Assets	1,876	1,035
Current derivative liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	(1,868)	(1,037)
Noncurrent derivative assets
Derivatives, Fair Value [Line Items]
Derivative Assets	501	356
Noncurrent derivative liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	(694)	(471)
Foreign currency exchange contracts
Derivatives, Fair Value [Line Items]
Derivative Liabilities	(6)	(4)
Natural gas
Derivatives, Fair Value [Line Items]
Derivative Assets	711	454
Derivative Liabilities	(905)	(594)
Electricity
Derivatives, Fair Value [Line Items]
Derivative Assets	1,334	643
Derivative Liabilities	(1,325)	(622)
Environmental & Other
Derivatives, Fair Value [Line Items]
Derivative Assets	332	294
Derivative Liabilities	(326)	(288)
Derivatives designated as hedging instruments | Foreign currency exchange contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	0	0
Derivative Liabilities	(4)	(4)
Derivatives not designated as hedging instruments
Derivatives, Fair Value [Line Items]
Derivative Assets	2,377	1,391
Derivative Liabilities	(2,558)	(1,504)
Derivatives not designated as hedging instruments | Foreign currency exchange contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	0	0
Derivative Liabilities	(2)	0
Derivatives not designated as hedging instruments | Natural gas
Derivatives, Fair Value [Line Items]
Derivative Assets	711	454
Derivative Liabilities	(905)	(594)
Derivatives not designated as hedging instruments | Electricity
Derivatives, Fair Value [Line Items]
Derivative Assets	1,334	643
Derivative Liabilities	(1,325)	(622)
Derivatives not designated as hedging instruments | Environmental & Other
Derivatives, Fair Value [Line Items]
Derivative Assets	332	294
Derivative Liabilities	(326)	(288)
Derivatives not designated as hedging instruments | FTRs | Other current assets | DTE Electric
Derivatives, Fair Value [Line Items]
Derivative Assets	$ 3	$ 9

Financial and Other Derivativ_4

Financial and Other Derivative Instruments (Details Textuals) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Letters of credit that could be used to offset net derivative liabilities	$ 13	$ 18
Letters of credit received that could be used to offset net derivative assets	45	$ 37
Contractual obligation to post collateral in event of downgrade to below investment grade	813
Derivative net liability position aggregate fair value	2,200
Collateral already posted fair value	26
Derivative net asset position, fair value	1,700
Remaining amount of offsets to derivative net liability positions for hard and soft trigger provisions	$ 510

Financial and Other Derivativ_5

Financial and Other Derivative Instruments (Net Cash Collateral Offsetting Arrangements) (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Cash collateral netted against Derivative assets	$ (225)	$ (90)
Cash collateral netted against Derivative liabilities	143	48
Cash collateral recorded in Accounts receivable	36	55
Cash collateral recorded in Accounts payable	(16)	(21)
Total net cash collateral posted (received)	$ (62)	$ (8)

Financial and Other Derivativ_6

Financial and Other Derivative Instruments (Netting Offsets of Derivative Assets and Liabilities) (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Derivative assets
Gross Amounts of Recognized Assets (Liabilities)	$ 2,377	$ 1,391
Gross Amounts Offset in the Consolidated Statements of Financial Position	(1,911)	(1,120)
Derivative assets, net	466	271
Derivative liabilities
Gross Amounts of Recognized Assets (Liabilities)	(2,562)	(1,508)
Gross Amounts Offset in the Consolidated Statements of Financial Position	1,829	1,078
Derivative liabilities, net	(733)	(430)
Natural gas
Derivative assets
Gross Amounts of Recognized Assets (Liabilities)	711	454
Gross Amounts Offset in the Consolidated Statements of Financial Position	(679)	(394)
Derivative assets, net	32	60
Derivative liabilities
Gross Amounts of Recognized Assets (Liabilities)	(905)	(594)
Gross Amounts Offset in the Consolidated Statements of Financial Position	553	347
Derivative liabilities, net	(352)	(247)
Electricity
Derivative assets
Gross Amounts of Recognized Assets (Liabilities)	1,334	643
Gross Amounts Offset in the Consolidated Statements of Financial Position	(905)	(441)
Derivative assets, net	429	202
Derivative liabilities
Gross Amounts of Recognized Assets (Liabilities)	(1,325)	(622)
Gross Amounts Offset in the Consolidated Statements of Financial Position	950	443
Derivative liabilities, net	(375)	(179)
Environmental & Other
Derivative assets
Gross Amounts of Recognized Assets (Liabilities)	332	294
Gross Amounts Offset in the Consolidated Statements of Financial Position	(327)	(285)
Derivative assets, net	5	9
Derivative liabilities
Gross Amounts of Recognized Assets (Liabilities)	(326)	(288)
Gross Amounts Offset in the Consolidated Statements of Financial Position	326	288
Derivative liabilities, net	0	0
Foreign currency exchange contracts
Derivative liabilities
Gross Amounts of Recognized Assets (Liabilities)	(6)	(4)
Gross Amounts Offset in the Consolidated Statements of Financial Position	0	0
Derivative liabilities, net	$ (6)	$ (4)

Financial and Other Derivativ_7

Financial and Other Derivative Instruments (Netting Offsets Reconciliation to Balance Sheet) (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Derivative Assets
Derivative Assets	$ 2,377	$ 1,391
Collateral adjustment	(225)	(90)
Derivative assets, current	352	181
Derivative assets, noncurrent	114	90
Derivative Liabilities
Derivative Liabilities	(2,562)	(1,508)
Collateral adjustment	143	48
Derivative liabilities, current	(453)	(238)
Derivative liabilities, noncurrent	(280)	(192)
Current derivative assets
Derivative Assets
Derivative Assets	1,876	1,035
Counterparty netting	(1,335)	(791)
Collateral adjustment	(189)	(63)
Derivative assets, current	352	181
Noncurrent derivative assets
Derivative Assets
Derivative Assets	501	356
Counterparty netting	(351)	(239)
Collateral adjustment	(36)	(27)
Derivative assets, noncurrent	114	90
Current derivative liabilities
Derivative Liabilities
Derivative Liabilities	(1,868)	(1,037)
Counterparty netting	1,335	791
Collateral adjustment	80	8
Derivative liabilities, current	(453)	(238)
Noncurrent derivative liabilities
Derivative Liabilities
Derivative Liabilities	(694)	(471)
Counterparty netting	351	239
Collateral adjustment	63	40
Derivative liabilities, noncurrent	$ (280)	$ (192)

Financial and Other Derivativ_8

Financial and Other Derivative Instruments (Effect of Derivatives not Designated as Hedging Instruments on the Consolidated Statement of Operations) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivatives	$ (170)	$ (99)
Natural gas | Operating Revenues — Non-utility operations
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivatives	(231)	(43)
Natural gas | Fuel, purchased power, gas, and other — non-utility
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivatives	65	(55)
Electricity | Operating Revenues — Non-utility operations
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivatives	2	33
Environmental & Other | Operating Revenues — Non-utility operations
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivatives	(4)	(32)
Foreign currency exchange contracts | Operating Revenues — Non-utility operations
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivatives	$ (2)	$ (2)

Financial and Other Derivativ_9

Financial and Other Derivative Instruments (Cumulative Gross Volume of Derivative Contracts Outstanding) (Details)	3 Months Ended
	Mar. 31, 2022CAD ($)MWhMMBTUTgal
Natural gas (MMBtu)
Derivative [Line Items]
Commodity, energy measures | MMBTU	2,174,656,330
Electricity (MWh)
Derivative [Line Items]
Commodity, energy measures	38,329,637
Oil (Gallons)
Derivative [Line Items]
Commodity, volume measure | gal	10,428,000
Foreign currency exchange ($ CAD)
Derivative [Line Items]
Commodity, monetary measure | $	$ 116,900,803
Renewable Energy Certificates (MWh)
Derivative [Line Items]
Commodity, energy measures	9,346,692
Carbon emissions (Metric Tons)
Derivative [Line Items]
Commodity, mass measure | T	1,355,694

Long-Term Debt (Schedule of Iss

Long-Term Debt (Schedule of Issued Debt) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2022	Mar. 31, 2021	Mar. 17, 2022	Feb. 28, 2022
Debt Instrument [Line Items]
Amount	$ 1,136	$ 1,136
Redemption of long-term debt		250	$ 0
DTE Electric
Debt Instrument [Line Items]
Redemption of long-term debt		$ 250	$ 0
DTE Electric | Parent
Debt Instrument [Line Items]
Payments of special dividend	115
DTE Electric | Mortgage Bonds | February 2022 3.00% Mortgage Bonds Maturing in 2032
Debt Instrument [Line Items]
Interest rate					3.00%
Amount					$ 500
DTE Electric | Mortgage Bonds | February 2022 3.65% Mortgage Bonds Maturing In 2052
Debt Instrument [Line Items]
Interest rate					3.65%
Amount					$ 400
DTE Electric | Mortgage Bonds | 2012 Series A Mortgage Bonds
Debt Instrument [Line Items]
Redemption of long-term debt	$ 115
DTE Electric | Securitization Bonds
Debt Instrument [Line Items]
Amount				$ 236
DTE Electric | Securitization Bonds | March 2022 2.64% Securitization Bonds Due 2027
Debt Instrument [Line Items]
Interest rate	2.64%	2.64%
Amount	$ 184	$ 184
DTE Electric | Securitization Bonds | March 2022 3.11% Securitization Bonds Due 2036
Debt Instrument [Line Items]
Interest rate	3.11%	3.11%
Amount	$ 52	$ 52

Long-Term Debt (Schedule of Deb

Long-Term Debt (Schedule of Debt Redeemed) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2022	Mar. 31, 2021
Debt Instrument, Redemption [Line Items]
Amount		$ 250	$ 0
DTE Electric
Debt Instrument, Redemption [Line Items]
Amount		$ 250	$ 0
DTE Electric | Mortgage Bonds | 2.65% Mortgage Bonds maturing In 2022
Debt Instrument, Redemption [Line Items]
Interest rate	2.65%	2.65%
Amount	$ 250

Short-Term Credit Arrangement_3

Short-Term Credit Arrangements and Borrowings (Details Textuals)	Mar. 31, 2022USD ($)	Dec. 31, 2021USD ($)	Sep. 30, 2021	Jun. 30, 2021
DTE Electric
Short-term Debt [Line Items]
Ratio of indebtedness to net capital	0.53
DTE Gas
Short-term Debt [Line Items]
Ratio of indebtedness to net capital	0.46
DTE Energy
Short-term Debt [Line Items]
Ratio of indebtedness to net capital	0.67
DTE Energy | Demand financing agreement
Short-term Debt [Line Items]
Maximum borrowing capacity, financing agreement	$ 250,000,000
Amount outstanding	58,000,000	$ 103,000,000
DTE Energy | Demand financing agreement | Demand financing agreement, indefinite term
Short-term Debt [Line Items]
Maximum borrowing capacity, financing agreement	50,000,000
Maximum additional margin financing	50,000,000
DTE Energy | Demand financing agreement | Demand financing agreement, expiring in 2022
Short-term Debt [Line Items]
Maximum borrowing capacity, financing agreement	$ 150,000,000
Maximum
Short-term Debt [Line Items]
Ratio of indebtedness to net capital			0.70	0.65

Short-Term Credit Arrangement_4

Short-Term Credit Arrangements and Borrowings (Details) $ in Millions	Mar. 31, 2022USD ($)
Availability under combined facilities
Maximum borrowing capacity	$ 3,058
Amounts outstanding	532
Net availability	2,526
DTE Electric
Availability under combined facilities
Maximum borrowing capacity	500
Amounts outstanding	0
Net availability	500
DTE Gas
Availability under combined facilities
Maximum borrowing capacity	300
Amounts outstanding	0
Net availability	300
DTE Energy
Availability under combined facilities
Maximum borrowing capacity	2,258
Amounts outstanding	532
Net availability	1,726
Revolver borrowings
Availability under combined facilities
Amounts outstanding	83
Revolver borrowings | DTE Electric
Availability under combined facilities
Amounts outstanding	0
Revolver borrowings | DTE Gas
Availability under combined facilities
Amounts outstanding	0
Revolver borrowings | DTE Energy
Availability under combined facilities
Amounts outstanding	83
Commercial paper issuances
Availability under combined facilities
Amounts outstanding	161
Commercial paper issuances | DTE Electric
Availability under combined facilities
Amounts outstanding	0
Commercial paper issuances | DTE Gas
Availability under combined facilities
Amounts outstanding	0
Commercial paper issuances | DTE Energy
Availability under combined facilities
Amounts outstanding	161
Letters of credit
Availability under combined facilities
Amounts outstanding	288
Letters of credit | DTE Electric
Availability under combined facilities
Amounts outstanding	0
Letters of credit | DTE Gas
Availability under combined facilities
Amounts outstanding	0
Letters of credit | DTE Energy
Availability under combined facilities
Amounts outstanding	288
Unsecured revolving credit facility, expiring April 2025 | Revolver borrowings
Availability under combined facilities
Maximum borrowing capacity	2,300
Unsecured revolving credit facility, expiring April 2025 | Revolver borrowings | DTE Electric
Availability under combined facilities
Maximum borrowing capacity	500
Unsecured revolving credit facility, expiring April 2025 | Revolver borrowings | DTE Gas
Availability under combined facilities
Maximum borrowing capacity	300
Unsecured revolving credit facility, expiring April 2025 | Revolver borrowings | DTE Energy
Availability under combined facilities
Maximum borrowing capacity	1,500
Unsecured term loan | Unsecured term loan
Availability under combined facilities
Maximum borrowing capacity	400
Unsecured term loan | Unsecured term loan | DTE Electric
Availability under combined facilities
Maximum borrowing capacity	0
Unsecured term loan | Unsecured term loan | DTE Gas
Availability under combined facilities
Maximum borrowing capacity	0
Unsecured term loan | Unsecured term loan | DTE Energy
Availability under combined facilities
Maximum borrowing capacity	400
Unsecured Canadian revolving credit facility, expiring May 2023 | Revolver borrowings
Availability under combined facilities
Maximum borrowing capacity	88
Unsecured Canadian revolving credit facility, expiring May 2023 | Revolver borrowings | DTE Electric
Availability under combined facilities
Maximum borrowing capacity	0
Unsecured Canadian revolving credit facility, expiring May 2023 | Revolver borrowings | DTE Gas
Availability under combined facilities
Maximum borrowing capacity	0
Unsecured Canadian revolving credit facility, expiring May 2023 | Revolver borrowings | DTE Energy
Availability under combined facilities
Maximum borrowing capacity	88
Unsecured letter of credit facility, expiring February 2023 | Letters of credit
Availability under combined facilities
Maximum borrowing capacity	150
Unsecured letter of credit facility, expiring February 2023 | Letters of credit | DTE Electric
Availability under combined facilities
Maximum borrowing capacity	0
Unsecured letter of credit facility, expiring February 2023 | Letters of credit | DTE Gas
Availability under combined facilities
Maximum borrowing capacity	0
Unsecured letter of credit facility, expiring February 2023 | Letters of credit | DTE Energy
Availability under combined facilities
Maximum borrowing capacity	150
Unsecured letter of credit facility, expiring July 2023 | Letters of credit
Availability under combined facilities
Maximum borrowing capacity	70
Unsecured letter of credit facility, expiring July 2023 | Letters of credit | DTE Electric
Availability under combined facilities
Maximum borrowing capacity	0
Unsecured letter of credit facility, expiring July 2023 | Letters of credit | DTE Gas
Availability under combined facilities
Maximum borrowing capacity	0
Unsecured letter of credit facility, expiring July 2023 | Letters of credit | DTE Energy
Availability under combined facilities
Maximum borrowing capacity	70
Unsecured letter of credit facility | Letters of credit
Availability under combined facilities
Maximum borrowing capacity	50
Unsecured letter of credit facility | Letters of credit | DTE Electric
Availability under combined facilities
Maximum borrowing capacity	0
Unsecured letter of credit facility | Letters of credit | DTE Gas
Availability under combined facilities
Maximum borrowing capacity	0
Unsecured letter of credit facility | Letters of credit | DTE Energy
Availability under combined facilities
Maximum borrowing capacity	50
Unsecured revolving credit facility, expiring April 2024 | Revolver borrowings
Availability under combined facilities
Maximum borrowing capacity	102
Unsecured revolving credit facility, expiring April 2024 | Revolver borrowings | DTE Electric
Availability under combined facilities
Maximum borrowing capacity	22
Unsecured revolving credit facility, expiring April 2024 | Revolver borrowings | DTE Gas
Availability under combined facilities
Maximum borrowing capacity	13
Unsecured revolving credit facility, expiring April 2024 | Revolver borrowings | DTE Energy
Availability under combined facilities
Maximum borrowing capacity	$ 67

Leases (Details Textuals)

Leases (Details Textuals) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Leases [Abstract]
Additional net investment in finance leases	$ 33
Interest income recognized under finance leases	$ 5	$ 4

Leases (Components of Net Inves

Leases (Components of Net Investment in Finance Leases) (Details) $ in Millions	Mar. 31, 2022USD ($)
Leases [Abstract]
2022	$ 19
2023	26
2024	27
2025	27
2026	26
2027 and Thereafter	335
Total minimum future lease receipts	460
Residual value of leased pipeline	17
Less unearned income	248
Net investment in finance lease	229
Less current portion	6
Net investment in finance lease, noncurrent	$ 223

Leases (Lease Income Associated

Leases (Lease Income Associated with Operating Leases) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Lessor, Lease, Description [Line Items]
Fixed payments	$ 4	$ 14
Variable payments	16	17
Total lease income under operating leases	20	31
Operating revenues
Lessor, Lease, Description [Line Items]
Total lease income under operating leases	20	21
Other income
Lessor, Lease, Description [Line Items]
Total lease income under operating leases	$ 0	$ 10

Commitments and Contingencies (

Commitments and Contingencies (Details Textuals)	3 Months Ended
	Mar. 31, 2022USD ($)employeesitefacility	Dec. 31, 2021USD ($)
Loss Contingencies [Line Items]
Estimated capital expenditures for current fiscal year	$ 3,700,000,000
Workforce subject to collective bargaining arrangements | Labor force concentration risk
Loss Contingencies [Line Items]
Number of employees | employee	5,200
Percentage of total employees	50.00%
Workforce Subject to Collective Bargaining Arrangements Expiring within One Year | Labor force concentration risk
Loss Contingencies [Line Items]
Percentage of total employees	14.00%
Reduced emissions fuel guarantees
Loss Contingencies [Line Items]
Number of days after expiration of statutes of limitations	90 days
Maximum potential liability	$ 720,000,000
Other guarantees
Loss Contingencies [Line Items]
Maximum potential liability	40,000,000
Performance surety bonds
Loss Contingencies [Line Items]
Performance bonds outstanding	135,000,000
DTE Electric
Loss Contingencies [Line Items]
Environmental capital expenditures	2,400,000,000
Estimated environmental capital expenditures	$ 0
Number of former MGP sites | site	3
Accrued for remediation	$ 12,000,000	$ 14,000,000
Number of permitted engineered ash storage facilities owned | facility	3
Estimated capital expenditures for current fiscal year	$ 2,700,000,000
DTE Electric | Workforce subject to collective bargaining arrangements | Labor force concentration risk
Loss Contingencies [Line Items]
Number of employees | employee	2,700
Percentage of total employees	56.00%
DTE Electric | Workforce Subject to Collective Bargaining Arrangements Expiring within One Year | Labor force concentration risk
Loss Contingencies [Line Items]
Percentage of total employees	21.00%
DTE Electric | Performance surety bonds
Loss Contingencies [Line Items]
Performance bonds outstanding	$ 119,000,000
DTE Electric | Coal Combustion Residual And Effluent Limitations Guidelines Rules
Loss Contingencies [Line Items]
Estimated impact of the CCR and ELG rules	562,000,000
Estimated impact of the CCR and ELG rules through 2026	$ 457,000,000
DTE Gas
Loss Contingencies [Line Items]
Number of former MGP sites | site	14
Accrued for remediation	$ 24,000,000	$ 24,000,000
Amortization period (in years)	10 years
DTE Gas | Clean up completed and site closed
Loss Contingencies [Line Items]
Number of former MGP sites | site	8
DTE Gas | Partial closure complete
Loss Contingencies [Line Items]
Number of former MGP sites | site	4

Retirement Benefits and Trust_3

Retirement Benefits and Trusteed Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 24	$ 27
Interest cost	41	39
Expected return on plan assets	(87)	(84)
Amortization of net actuarial loss	29	49
Amortization of prior service credit	0	0
Net periodic benefit cost (credit)	7	31
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	7	8
Interest cost	12	11
Expected return on plan assets	(32)	(32)
Amortization of net actuarial loss	1	3
Amortization of prior service credit	(5)	(5)
Net periodic benefit cost (credit)	(17)	(15)
Other Postretirement Benefits | DTE Electric
Defined Benefit Plan Disclosure [Line Items]
Service cost	5	6
Interest cost	9	8
Expected return on plan assets	(21)	(22)
Amortization of net actuarial loss	1	3
Amortization of prior service credit	(3)	(3)
Net periodic benefit cost (credit)	$ (9)	$ (8)

Retirement Benefits and Trust_4

Retirement Benefits and Trusteed Assets (Details Textuals) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2022
Pension plans | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Anticipated contributions, current fiscal year	$ 0
Postretirement benefit plans
Defined Benefit Plan Disclosure [Line Items]
Anticipated contributions, current fiscal year	0
DTE Electric | Pension plans
Defined Benefit Plan Disclosure [Line Items]
Pension cost	$ 9,000,000	$ 26,000,000
DTE Electric | Pension plans | Qualified Plan | Maximum | Forecast
Defined Benefit Plan Disclosure [Line Items]
Pension funds transferred to (from) plan			$ 50,000,000
DTE Gas | Pension plans | Qualified Plan | Maximum | Forecast
Defined Benefit Plan Disclosure [Line Items]
Pension funds transferred to (from) plan			$ (50,000,000)

Segment and Related Informati_3

Segment and Related Information (Details Textuals) customer in Millions	Mar. 31, 2022customer
Segment Reporting [Abstract]
Number of electric utility customers	2.3
Number of gas utility customers	1.3

Segment and Related Informati_4

Segment and Related Information (Financial Data - Inter-segment Billing) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Operating Revenues	$ (4,577)	$ (3,581)
Electric
Segment Reporting Information [Line Items]
Operating Revenues	(1,490)	(1,364)
Gas
Segment Reporting Information [Line Items]
Operating Revenues	(766)	(612)
DTE Vantage
Segment Reporting Information [Line Items]
Operating Revenues	(179)	(366)
Energy Trading
Segment Reporting Information [Line Items]
Operating Revenues	(2,203)	(1,439)
Reconciliation and Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	61	196
Reconciliation and Eliminations | Electric
Segment Reporting Information [Line Items]
Operating Revenues	16	16
Reconciliation and Eliminations | Gas
Segment Reporting Information [Line Items]
Operating Revenues	3	4
Reconciliation and Eliminations | DTE Vantage
Segment Reporting Information [Line Items]
Operating Revenues	25	162
Reconciliation and Eliminations | Energy Trading
Segment Reporting Information [Line Items]
Operating Revenues	17	13
Reconciliation and Eliminations | Corporate and Other
Segment Reporting Information [Line Items]
Operating Revenues	$ 0	$ 1

Segment and Related Informati_5

Segment and Related Information (Financial Data - Operating Revenues including Inter-segment Revenues) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Utility operations	$ 2,234	$ 1,953
Operating Revenues — Non-utility operations	2,343	1,628
Operating Revenues	4,577	3,581
Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Non-utility operations	(61)	(201)
Operating Revenues	(61)	(196)
Electric
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	1,490	1,364
Electric | Operating segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Utility operations	1,486	1,360
Operating Revenues — Non-utility operations	4	4
Electric | Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	(16)	(16)
Gas
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	766	612
Gas | Operating segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Utility operations	766	612
Gas | Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	(3)	(4)
DTE Vantage
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	179	366
DTE Vantage | Operating segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Non-utility operations	179	366
DTE Vantage | Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	(25)	(162)
Energy Trading
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	2,203	1,439
Energy Trading | Operating segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Non-utility operations	2,203	1,439
Energy Trading | Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	(17)	(13)
Corporate and Other | Operating segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Non-utility operations	0	1
Corporate and Other | Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	$ 0	(1)
Gas Storage and Pipelines | Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Non-utility operations		$ 5

Segment and Related Informati_6

Segment and Related Information (Financial Data - Net Income (Loss) Attributable to DTE Energy by Segment) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net Income (Loss) attributable to DTE Energy — continuing operations	$ 394	$ 320
Net Income Attributable to DTE Energy Company — discontinued operations	0	77
Net Income Attributable to DTE Energy Company/DTE Electric Company	394	397
Electric
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net Income (Loss) attributable to DTE Energy — continuing operations	201	208
Gas
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net Income (Loss) attributable to DTE Energy — continuing operations	196	169
DTE Vantage
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net Income (Loss) attributable to DTE Energy — continuing operations	14	28
Energy Trading
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net Income (Loss) attributable to DTE Energy — continuing operations	(9)	(55)
Corporate and Other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net Income (Loss) attributable to DTE Energy — continuing operations	$ (8)	$ (30)