Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Operating Activities
Net Income	$ 576	$ 619
Net Income	576	617
Adjustments to reconcile Net Income to Net cash from operating activities:
Depreciation and amortization	748	703
Nuclear fuel amortization	29	13
Allowance for equity funds used during construction	(13)	(13)
Deferred income taxes	68	286
Equity earnings of equity method investees	(73)	(59)
Dividends from equity method investees	73	81
Asset (gains) losses and impairments, net	47	49
Changes in assets and liabilities:
Accounts receivable, net	85	156
Inventories	(53)	(24)
Prepaid postretirement benefit costs	(41)	(44)
Accounts payable	112	(78)
Gas inventory equalization	31	29
Accrued pension liability	(44)	(29)
Accrued postretirement liability	(11)	0
Derivative assets and liabilities	203	(58)
Regulatory assets and liabilities	265	(67)
Other current and noncurrent assets and liabilities	(86)	117
Net cash from operating activities	1,916	1,681
Investing Activities
Plant and equipment expenditures — utility	(1,788)	(1,599)
Plant and equipment expenditures — non-utility	(86)	(424)
Acquisitions related to business combinations, net of cash acquired	0	(126)
Proceeds from sale of assets	2	4
Proceeds from sale of nuclear decommissioning trust fund assets	637	1,238
Investment in nuclear decommissioning trust funds	(640)	(1,238)
Distributions from equity method investees	11	6
Contributions to equity method investees	(6)	(17)
Notes receivable	(51)	(24)
Other	(7)	(5)
Net cash used for investing activities	(1,928)	(2,185)
Financing Activities
Issuance of long-term debt, net of discount and issuance costs	4,035	1,685
Redemption of long-term debt	(583)	(300)
Short-term borrowings, net	31	86
Repurchase of common stock	(54)	0
Dividends paid on common stock	(420)	(390)
Contributions from noncontrolling interests, principally REF entities	22	15
Distributions to noncontrolling interests	(26)	(13)
Other	(59)	(51)
Net cash from financing activities	2,946	1,032
Net Increase (Decrease) in Cash and Cash Equivalents	2,934	528
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	516	93
Cash, Cash Equivalents, and Restricted Cash at End of Period	3,450	621
Supplemental disclosure of non-cash investing and financing activities
Plant and equipment expenditures in accounts payable	295	340
DTE Electric
Operating Activities
Net Income	446	277
Adjustments to reconcile Net Income to Net cash from operating activities:
Depreciation and amortization	532	510
Nuclear fuel amortization	29	13
Allowance for equity funds used during construction	(12)	(12)
Deferred income taxes	36	26
Asset (gains) losses and impairments, net	0	41
Changes in assets and liabilities:
Accounts receivable, net	(30)	(62)
Inventories	(17)	(32)
Accounts payable	25	42
Prepaid postretirement benefit costs — affiliates	(24)	0
Accrued pension liability — affiliates	(23)	(13)
Accrued postretirement liability — affiliates	(9)	(29)
Regulatory assets and liabilities	235	(91)
Other current and noncurrent assets and liabilities	(159)	87
Net cash from operating activities	1,029	757
Investing Activities
Plant and equipment expenditures	(1,512)	(1,381)
Proceeds from sale of nuclear decommissioning trust fund assets	637	1,238
Investment in nuclear decommissioning trust funds	(640)	(1,238)
Other	(6)	(4)
Net cash used for investing activities	(1,521)	(1,387)
Financing Activities
Issuance of long-term debt, net of discount and issuance costs	987	1,685
Redemption of long-term debt	(283)	(300)
Short-term borrowings, net — affiliate	93	10
Short-term borrowings, net — other	0	(154)
Dividends paid on common stock	(293)	(269)
Other	(17)	(18)
Net cash from financing activities	487	954
Net Increase (Decrease) in Cash and Cash Equivalents	(5)	324
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	16	12
Cash, Cash Equivalents, and Restricted Cash at End of Period	11	336
Supplemental disclosure of non-cash investing and financing activities
Plant and equipment expenditures in accounts payable	$ 201	$ 170