Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating Activities
Net Income	$ 240	$ 274
Net Income (Loss)	247	273
Adjustments to reconcile Net Income to net cash from operating activities:
Depreciation and amortization	229	209
Nuclear fuel amortization	15	13
Allowance for equity funds used during construction	(5)	(5)
Deferred income taxes	80	84
Equity earnings of equity method investees	(15)	(16)
Dividends from equity method investees	18	16
Asset (gains) losses and impairments, net	0	(10)
Changes in assets and liabilities:
Accounts receivable, net	97	(8)
Inventories	143	172
Accounts payable	(93)	(123)
Gas inventory equalization	87	130
Accrued pension liability	(3)	2
Accrued postretirement liability	(29)	(135)
Derivative assets and liabilities	40	49
Regulatory assets and liabilities	34	(4)
Other current and noncurrent assets and liabilities	(97)	99
Net cash from operating activities	741	747
Investing Activities
Plant and equipment expenditures — utility	(394)	(366)
Plant and equipment expenditures — non-utility	(30)	(39)
Acquisition	0	(240)
Proceeds from sale of assets	0	13
Restricted cash for debt redemption, principally Securitization, net	0	96
Proceeds from sale of nuclear decommissioning trust fund assets	260	246
Investment in nuclear decommissioning trust funds	(262)	(250)
Distributions from equity method investees	3	3
Contributions to equity method investees	(26)	(22)
Other	12	3
Net cash used for investing activities	(437)	(556)
Financing Activities
Issuance of long-term debt, net of issuance costs	0	495
Redemption of long-term debt	(11)	(117)
Short-term borrowings, net	(134)	(398)
Issuance of common stock	0	9
Repurchase of common stock	(33)	0
Dividends on common stock	(131)	(122)
Other	3	(7)
Net cash from (used for) financing activities	(306)	(140)
Net Increase (Decrease) in Cash and Cash Equivalents	(2)	51
Cash and Cash Equivalents at Beginning of Period	37	48
Cash and Cash Equivalents at End of Period	35	99
Supplemental disclosure of non-cash investing and financing activities
Plant and equipment expenditures in accounts payable	134	186
DTE Electric
Operating Activities
Net Income (Loss)	127	137
Adjustments to reconcile Net Income to net cash from operating activities:
Depreciation and amortization	176	155
Nuclear fuel amortization	15	13
Allowance for equity funds used during construction	(4)	(5)
Deferred income taxes	70	76
Changes in assets and liabilities:
Accounts receivable, net	57	(3)
Inventories	31	2
Accounts payable	25	(8)
Accrued pension liability — affiliates	3	(88)
Accrued postretirement liability — affiliates	(19)	(128)
Regulatory assets and liabilities	40	(43)
Other current and noncurrent assets and liabilities	(68)	65
Net cash from operating activities	453	173
Investing Activities
Plant and equipment expenditures	(315)	(311)
Acquisition	0	(240)
Proceeds from sale of assets	6	0
Restricted cash for debt redemption, principally Securitization, net	0	96
Notes receivable from affiliate	0	8
Proceeds from sale of nuclear decommissioning trust fund assets	260	246
Investment in nuclear decommissioning trust funds	(262)	(250)
Transfer of Rabbi Trust assets to affiliate	0	137
Other	14	2
Net cash used for investing activities	(297)	(312)
Financing Activities
Issuance of long-term debt, net of issuance costs	0	496
Redemption of long-term debt	(10)	(115)
Short-term borrowings, net — affiliate	22	(49)
Short-term borrowings, net — other	(61)	(50)
Dividends on common stock	(105)	(99)
Other	0	(4)
Net cash from (used for) financing activities	(154)	179
Net Increase (Decrease) in Cash and Cash Equivalents	2	40
Cash and Cash Equivalents at Beginning of Period	15	14
Cash and Cash Equivalents at End of Period	17	54
Supplemental disclosure of non-cash investing and financing activities
Plant and equipment expenditures in accounts payable	$ 100	$ 154