Consolidated Statements of Cash Flows - DTE Electric Company - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Activities
Net Income		$ 907	$ 1,368	$ 1,169
Adjustments to reconcile Net Income to Net cash from operating activities:
Depreciation and amortization		1,377	1,292	1,169
Nuclear fuel amortization		58	37	60
Allowance for equity funds used during construction		(27)	(25)	(24)
Deferred income taxes		(32)	407	329
Asset (gains) losses and impairments, net		50	47	14
Changes in assets and liabilities:
Accounts receivable, net		(146)	111	49
Inventories		(153)	45	59
Accounts payable		308	0	(288)
Regulatory assets and liabilities		862	104	160
Other current and noncurrent assets and liabilities		(153)	260	(113)
Net cash from operating activities		3,067	3,697	2,649
Investing Activities
Proceeds from Sale and Maturity of Other Investments		1,047	2,350	788
Investment in nuclear decommissioning trust funds		(1,046)	(2,350)	(794)
Net cash used for investing activities		(3,863)	(4,070)	(5,732)
Financing Activities
Issuance of long-term debt, net of issuance costs		4,457	3,692	2,506
Redemption of long-term debt		(3,522)	(882)	(821)
Dividends paid on common stock		(791)	(760)	(692)
Other		(84)	(83)	(79)
Net cash from financing activities		315	796	3,100
Net Increase (Decrease) in Cash, Cash Equivalents, and Restricted Cash		(481)	423	17
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period		516	93	76
Cash, Cash Equivalents, and Restricted Cash at End of Period		35	516	93
Supplemental disclosure of cash information
Cash paid (received) for: Interest, net of interest capitalized		671	679	595
Cash paid (received) for: Income taxes	[1]	(3)	(360)	18
Supplemental disclosure of non-cash investing and financing activities
Plant and equipment expenditures in accounts payable		353	266	311
DTE Electric
Operating Activities
Net Income		866	778	716
Adjustments to reconcile Net Income to Net cash from operating activities:
Depreciation and amortization		1,109	1,043	946
Nuclear fuel amortization		58	37	60
Allowance for equity funds used during construction		(25)	(23)	(22)
Deferred income taxes		122	89	97
Asset (gains) losses and impairments, net		1	41	13
Changes in assets and liabilities:
Accounts receivable, net		68	(42)	20
Inventories		(11)	(12)	(17)
Prepaid postretirement benefit costs — affiliates		(67)	(69)	(77)
Accounts payable		65	20	(57)
Accrued pension liability — affiliates		(326)	14	(1)
Accrued postretirement liability — affiliates		(44)	17	89
Regulatory assets and liabilities		716	55	139
Other current and noncurrent assets and liabilities		(216)	(43)	(197)
Net cash from operating activities		2,316	1,905	1,709
Investing Activities
Plant and equipment expenditures		(3,017)	(2,674)	(2,200)
Proceeds from Sale and Maturity of Other Investments		1,047	2,350	788
Investment in nuclear decommissioning trust funds		(1,046)	(2,350)	(794)
Notes receivable and other		(31)	(8)	(21)
Net cash used for investing activities		(3,047)	(2,682)	(2,227)
Financing Activities
Issuance of long-term debt, net of issuance costs		985	1,683	643
Redemption of long-term debt		(321)	(632)	0
Capital contribution by parent company		555	636	180
Short-term borrowings, net — affiliate		(48)	4	(4)
Short-term borrowings, net — other		153	(354)	205
Dividends paid on common stock		(588)	(539)	(494)
Other		(12)	(17)	(18)
Net cash from financing activities		724	781	512
Net Increase (Decrease) in Cash, Cash Equivalents, and Restricted Cash		(7)	4	(6)
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period		16	12	18
Cash, Cash Equivalents, and Restricted Cash at End of Period		9	16	12
Supplemental disclosure of cash information
Cash paid (received) for: Interest, net of interest capitalized		321	315	295
Cash paid (received) for: Income taxes		5	14	46
Supplemental disclosure of non-cash investing and financing activities
Plant and equipment expenditures in accounts payable		$ 286	$ 174	$ 192

[1] 2020 cash received primarily relates to AMT credit and other refunds, of which a portion was accelerated due to the CARES Act