Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2013

Long-term Debt, Unclassified [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

The Company’s long-term debt outstanding and weighted average interest rates (a) of debt outstanding at December 31 were:

	2013			2012
	(In millions)
Mortgage bonds, notes, and other
DTE Energy Debt, Unsecured
6.1% due 2014 to 2033	$	1,297		$	1,298
DTE Electric Taxable Debt, Principally Secured
4.7% due 2014 to 2043	4,286			3,777
DTE Electric Tax-Exempt Revenue Bonds (b)
5.1% due 2014 to 2036	558			707
DTE Gas Taxable Debt, Principally Secured
5.6% due 2014 to 2042	1,029			919
Other Long-Term Debt, Including Non-Recourse Debt	142			153
	7,312			6,854
Less amount due within one year	(694		)	(634		)
	$	6,618		$	6,220
Securitization bonds
6.6% due 2015	$	302		$	479
Less amount due within one year	(197		)	(177		)
	$	105		$	302
Junior Subordinated Debentures
6.5% due 2061	$	280		$	280
5.25% due 2062	200			200
	$	480		$	480

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(a) Weighted average interest rates as of December 31, 2013 are shown below the description of each category of debt.

(b) DTE Electric Tax-Exempt Revenue Bonds are issued by a public body that loans the proceeds to DTE Electric on terms substantially mirroring the Revenue Bonds.

Schedule of Issued Debt [Table Text Block]

In 2013, the following debt was issued:

Company	Month Issued	Type	Interest Rate		Maturity	Amount
						(In millions)
DTE Electric	March	Mortgage Bonds (a)	4.00	%	2043	$	375
DTE Electric	August	Mortgage Bonds (a)	3.65	%	2024	400
DTE Energy	November	Senior Notes (a)	3.85	%	2023	300
DTE Gas	December	Mortgage Bonds (a)	3.64	%	2023	50
DTE Gas	December	Mortgage Bonds (a)	3.74	%	2025	70
DTE Gas	December	Mortgage Bonds (a)	3.94	%	2028	50
						$	1,245

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(a) Proceeds were used for the redemption of long-term debt, repayment of short-term borrowings and general corporate purposes.

Schedule of Extinguishment of Debt [Table Text Block]

In 2013, the following debt was redeemed:

Company	Month	Type	Interest Rate		Maturity	Amount
						(In millions)
DTE Electric	March	Securitization Bonds	6.42	%	2013	$	88
DTE Electric	March	Tax Exempt Revenue Bonds (a)	5.30	%	2030	51
DTE Electric	April	Other Long-Term Debt	Various		2013	13
DTE Gas	April	Senior Notes	5.26	%	2013	60
DTE Energy	June	Senior Notes	Variable		2013	300
DTE Electric	September	Securitization Bonds	6.62	%	2013	89
DTE Electric	September	Senior Notes	6.40	%	2013	250
DTE Electric	December	Tax Exempt Revenue Bonds (a)	5.50	%	2030	49
DTE Electric	December	Tax Exempt Revenue Bonds (a)	6.75	%	2038	50
DTE Energy	Various	Other Long-Term Debt	Various		2013	11
						$	961

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(a) DTE Electric Tax Exempt Revenue Bonds are issued by a public body that loans the proceeds to DTE Electric on terms substantially mirroring the Revenue Bonds.

Schedule of Maturities of Long-term Debt [Table Text Block]

The following table shows the scheduled debt maturities:

	2014		2015		2016		2017		2018		2019 and Thereafter		Total
	(In millions)
Amount to mature	$	891	$	476	$	465	$	9	$	407	$	5,846	$	8,094