Short-Term Credit Arrangements and Borrowings (Details Textuals) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013 banks	Dec. 31, 2012
Short-term Debt [Line Items]
Revolving Credit Facilities with a Syndicate Number of Banks	19
Number of Banks that Provide Percentage of Commitment in any Facility	1
Maximum Percentage of Commitment to Bank in any Facility	8.70%
Maximum Total Funded Debt to Total Capitalization Ratio	0.65
Letters of Credit Outstanding, Amount	$ 375
Short-term Debt, Weighted Average Interest Rate	0.20%	0.40%
DTE Energy [Member]
Short-term Debt [Line Items]
Total Funded Debt to Total Capitalization Ratio	0.48
Letters of Credit Outstanding, Amount	279
DTE Electric [Member]
Short-term Debt [Line Items]
Total Funded Debt to Total Capitalization Ratio	0.50
Letters of Credit Outstanding, Amount	0
DTE Gas [Member]
Short-term Debt [Line Items]
Total Funded Debt to Total Capitalization Ratio	0.48
Letters of Credit Outstanding, Amount	96
Letter of Credit [Member]
Short-term Debt [Line Items]
Letters of Credit Outstanding, Amount	244
Letter of Credit [Member] | DTE Energy [Member]
Short-term Debt [Line Items]
Letters of Credit Outstanding, Amount	244
Letter of Credit [Member] | DTE Electric [Member]
Short-term Debt [Line Items]
Letters of Credit Outstanding, Amount	0
Letter of Credit [Member] | DTE Gas [Member]
Short-term Debt [Line Items]
Letters of Credit Outstanding, Amount	0
Letter of Credit [Member] | Other outstanding letters of credit [Member] | DTE Energy [Member]
Short-term Debt [Line Items]
Letters of Credit Outstanding, Amount	53
Letter of Credit [Member] | Demand Financing Agreement with Newedge letter of credit to raise capacity [Member] | DTE Energy [Member]
Short-term Debt [Line Items]
Borrowing Capacity Under Financing Agreement With iss Clearing Agent	50
Demand Financing Agreement with Newedge plus letter of credit [Member] | DTE Energy [Member]
Short-term Debt [Line Items]
Borrowing Capacity Under Financing Agreement With iss Clearing Agent	150
Demand Financing Agreement with Newedge [Member] | DTE Energy [Member]
Short-term Debt [Line Items]
Borrowing Capacity Under Financing Agreement With iss Clearing Agent	100
Maximum Additional Margin Financing	50
Financing Agreement, Amount Outstanding	$ 138	$ 65