Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating Activities
Net Income	$ 351	$ 394
Net Income	361	400
Adjustments to reconcile Net Income to Net cash from operating activities:
Depreciation and amortization	281	249
Nuclear fuel amortization	15	12
Allowance for equity funds used during construction	(7)	(7)
Deferred income taxes	60	100
Equity earnings of equity method investees	(21)	(26)
Dividends from equity method investees	15	18
Changes in assets and liabilities:
Accounts receivable, net	33	84
Inventories	182	135
Accounts payable	(136)	(33)
Gas inventory equalization	85	86
Accrued pension liability	(187)	(130)
Accrued postretirement liability	(36)	27
Derivative assets and liabilities	(7)	(100)
Regulatory assets and liabilities	148	128
Other current and noncurrent assets and liabilities	62	(150)
Net cash from operating activities	838	787
Investing Activities
Plant and equipment expenditures — utility	(466)	(533)
Plant and equipment expenditures — non-utility	(61)	(22)
Proceeds from sale of nuclear decommissioning trust fund assets	336	394
Investment in nuclear decommissioning trust funds	(337)	(378)
Distributions from equity method investees	4	6
Contributions to equity method investees	(64)	(112)
Other	2	3
Net cash used for investing activities	(586)	(642)
Financing Activities
Issuance of long-term debt, net of issuance costs	0	496
Short-term borrowings, net	14	(440)
Repurchase of common stock	0	(51)
Dividends on common stock	(158)	(148)
REF contributions from noncontrolling interests	12	11
Other	(23)	(24)
Net cash used for financing activities	(155)	(156)
Net Increase (Decrease) in Cash, Cash Equivalents, and Restricted Cash	97	(11)
Cash and Cash Equivalents at Beginning of Period	66
Cash and Cash Equivalents at End of Period	164	82
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	89	113
Cash, Cash Equivalents, and Restricted Cash at End of Period	186	102
Supplemental disclosure of non-cash investing and financing activities
Plant and equipment expenditures in accounts payable	179	196
DTE Electric
Operating Activities
Net Income	140	106
Adjustments to reconcile Net Income to Net cash from operating activities:
Depreciation and amortization	212	181
Nuclear fuel amortization	15	12
Allowance for equity funds used during construction	(5)	(6)
Deferred income taxes	48	57
Changes in assets and liabilities:
Accounts receivable, net	39	58
Inventories	50	44
Accounts payable	(30)	26
Accrued pension liability — affiliates	(178)	(123)
Accrued postretirement liability — affiliates	(24)	21
Regulatory assets and liabilities	97	122
Other current and noncurrent assets and liabilities	(41)	(87)
Net cash from operating activities	323	411
Investing Activities
Plant and equipment expenditures	(370)	(408)
Proceeds from sale of nuclear decommissioning trust fund assets	336	394
Investment in nuclear decommissioning trust funds	(337)	(378)
Other	0	5
Net cash used for investing activities	(371)	(387)
Financing Activities
Short-term borrowings, net — affiliate	26	88
Short-term borrowings, net — other	142	(3)
Dividends on common stock	(115)	(108)
Other	(4)	(3)
Net cash used for financing activities	49	(26)
Net Increase (Decrease) in Cash and Cash Equivalents	1	(2)
Cash and Cash Equivalents at Beginning of Period	15	13
Cash and Cash Equivalents at End of Period	16	11
Supplemental disclosure of non-cash investing and financing activities
Plant and equipment expenditures in accounts payable	$ 109	$ 134