Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Operating Activities
Net Income	$ 394	$ 240
Net Income	400	247
Adjustments to reconcile Net Income to net cash from operating activities:
Depreciation and amortization	249	229
Nuclear fuel amortization	12	15
Allowance for equity funds used during construction	(7)	(5)
Deferred income taxes	100	80
Equity earnings of equity method investees	(26)	(15)
Dividends from equity method investees	18	18
Changes in assets and liabilities:
Accounts receivable, net	84	97
Inventories	135	143
Accounts payable	(33)	(93)
Gas inventory equalization	86	87
Accrued pension liability	(130)	(3)
Accrued postretirement liability	27	(29)
Derivative assets and liabilities	(100)	40
Regulatory assets and liabilities	128	34
Other current and noncurrent assets and liabilities	(150)	(93)
Net cash from operating activities	787	745
Investing Activities
Plant and equipment expenditures — utility	(533)	(394)
Plant and equipment expenditures — non-utility	(22)	(30)
Proceeds from sale of nuclear decommissioning trust fund assets	394	260
Investment in nuclear decommissioning trust funds	(378)	(262)
Distributions from equity method investees	6	3
Contributions to equity method investees	(112)	(26)
Other	4	12
Net cash used for investing activities	(641)	(437)
Financing Activities
Issuance of long-term debt, net of issuance costs	496	0
Redemption of long-term debt	(5)	(11)
Short-term borrowings, net	(440)	(134)
Repurchase of common stock	(51)	(33)
Dividends on common stock	(148)	(131)
Other	(8)	(1)
Net cash used for financing activities	(156)	(310)
Net Increase (Decrease) in Cash and Cash Equivalents	(10)	(2)
Cash and Cash Equivalents at Beginning of Period	92	37
Cash and Cash Equivalents at End of Period	82	35
Supplemental disclosure of non-cash investing and financing activities
Plant and equipment expenditures in accounts payable	196	134
DTE Electric
Operating Activities
Net Income	106	127
Adjustments to reconcile Net Income to net cash from operating activities:
Depreciation and amortization	181	176
Nuclear fuel amortization	12	15
Allowance for equity funds used during construction	(6)	(4)
Deferred income taxes	57	70
Changes in assets and liabilities:
Accounts receivable, net	58	57
Inventories	44	31
Accounts payable	26	25
Accrued pension liability — affiliates	(123)	3
Accrued postretirement liability — affiliates	21	(19)
Regulatory assets and liabilities	122	40
Other current and noncurrent assets and liabilities	(87)	(68)
Net cash from operating activities	411	453
Investing Activities
Plant and equipment expenditures	(408)	(315)
Proceeds from sale of assets	0	6
Proceeds from sale of nuclear decommissioning trust fund assets	394	260
Investment in nuclear decommissioning trust funds	(378)	(262)
Other	5	14
Net cash used for investing activities	(387)	(297)
Financing Activities
Redemption of long-term debt	0	(10)
Short-term borrowings, net — affiliate	88	22
Short-term borrowings, net — other	(3)	(61)
Dividends on common stock	(108)	(105)
Other	(3)	0
Net cash used for financing activities	(26)	(154)
Net Increase (Decrease) in Cash and Cash Equivalents	(2)	2
Cash and Cash Equivalents at Beginning of Period	13	15
Cash and Cash Equivalents at End of Period	11	17
Supplemental disclosure of non-cash investing and financing activities
Plant and equipment expenditures in accounts payable	$ 134	$ 100