Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Operating Activities
Net Income	$ 274	$ 327
Net Income	273	326
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	209	280
Nuclear fuel amortization	13	5
Allowance for equity funds used during construction	(5)	(5)
Deferred income taxes	84	77
Asset (gains) losses and impairments, net	(10)	(1)
Changes in assets and liabilities:
Accounts receivable, net	(8)	(270)
Inventories	172	147
Accounts payable	(123)	100
Gas inventory equalization	130	142
Accrued pension obligation	2	(23)
Accrued postretirement obligation	(135)	(22)
Derivative assets and liabilities	49	(51)
Regulatory assets and liabilities	(4)	(222)
Other assets	2	50
Other liabilities	97	(2)
Net cash from operating activities	747	532
Investing Activities
Plant and equipment expenditures — utility	(366)	(399)
Plant and equipment expenditures — non-utility	(39)	(98)
Acquisition	(240)	0
Proceeds from sale of assets	13	3
Restricted cash for debt redemption, principally Securitization	96	66
Proceeds from sale of nuclear decommissioning trust fund assets	246	271
Investment in nuclear decommissioning trust funds	(250)	(275)
Other	(16)	(10)
Net cash used for investing activities	(556)	(442)
Financing Activities
Issuance of long-term debt, net of issuance costs	495	0
Redemption of long-term debt	(117)	(115)
Short-term borrowings, net	(398)	244
Issuance of common stock	9	0
Repurchase of common stock	0	(50)
Dividends on common stock	(122)	(116)
Other	(7)	(7)
Net cash used for financing activities	(140)	(44)
Net Increase in Cash and Cash Equivalents	51	46
Cash and Cash Equivalents at Beginning of Period	48	52
Cash and Cash Equivalents at End of Period	99	98
Supplemental disclosure of non-cash investing and financing activities
Plant and equipment expenditures in accounts payable	186	212
DTE Electric
Operating Activities
Net Income	137	137
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	155	228
Nuclear fuel amortization	13	5
Allowance for equity funds used during construction	(5)	(5)
Deferred income taxes	76	42
Changes in assets and liabilities:
Accounts receivable, net	(3)	6
Inventories	2	55
Accounts payable	(8)	73
Accrued pension liability — affiliates	(88)	(20)
Accrued postretirement liability — affiliates	(128)	(15)
Regulatory assets and liabilities	(43)	(135)
Other assets	(38)	(28)
Other liabilities	103	(31)
Net cash from operating activities	173	312
Investing Activities
Plant and equipment expenditures	(311)	(354)
Acquisition	(240)	0
Restricted cash for debt redemption, principally Securitization	96	65
Notes receivable from affiliate	8	200
Proceeds from sale of nuclear decommissioning trust fund assets	246	271
Investment in nuclear decommissioning trust funds	(250)	(275)
Transfer of Rabbi Trust assets to affiliate	137	0
Other	2	(8)
Net cash used for investing activities	(312)	(101)
Financing Activities
Issuance of long-term debt, net of issuance costs	496	0
Redemption of long-term debt	(115)	(113)
Short-term borrowings, net — other	(50)	0
Short-term borrowings, net — affiliate	(49)	5
Dividends on common stock	(99)	(93)
Other	(4)	(3)
Net cash used for financing activities	179	(204)
Net Increase in Cash and Cash Equivalents	40	7
Cash and Cash Equivalents at Beginning of Period	14	27
Cash and Cash Equivalents at End of Period	54	34
Supplemental disclosure of non-cash investing and financing activities
Plant and equipment expenditures in accounts payable	$ 154	$ 176