Short-Term Credit Arrangements and Borrowings (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013
Line Of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,975
Amounts outstanding	375
Net availability	1,600
DTE Energy [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	1,375
Amounts outstanding	279
Net availability	1,096
DTE Electric [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	300
Amounts outstanding	0
Net availability	300
DTE Gas [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	300
Amounts outstanding	96
Net availability	204
Letter of Credit [Member]
Line Of Credit Facility [Line Items]
Amounts outstanding	244
Letter of Credit [Member] | DTE Energy [Member]
Line Of Credit Facility [Line Items]
Amounts outstanding	244
Letter of Credit [Member] | DTE Electric [Member]
Line Of Credit Facility [Line Items]
Amounts outstanding	0
Letter of Credit [Member] | DTE Gas [Member]
Line Of Credit Facility [Line Items]
Amounts outstanding	0
Letter of Credit [Member] | Unsecured letter of credit, expiring in May 2014 [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	50
Letter of Credit [Member] | Unsecured letter of credit, expiring in May 2014 [Member] | DTE Energy [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	50
Letter of Credit [Member] | Unsecured letter of credit, expiring in May 2014 [Member] | DTE Electric [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	0
Letter of Credit [Member] | Unsecured letter of credit, expiring in May 2014 [Member] | DTE Gas [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	0
Letter of Credit [Member] | Unsecured letter of credit, expiring in August 2015 [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	125
Letter of Credit [Member] | Unsecured letter of credit, expiring in August 2015 [Member] | DTE Energy [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	125
Letter of Credit [Member] | Unsecured letter of credit, expiring in August 2015 [Member] | DTE Electric [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	0
Letter of Credit [Member] | Unsecured letter of credit, expiring in August 2015 [Member] | DTE Gas [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	0
Revolving Credit Facility [Member] | Unsecured revolving credit facility, expiring April 2018 [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	1,800
Revolving Credit Facility [Member] | Unsecured revolving credit facility, expiring April 2018 [Member] | DTE Energy [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	1,200
Revolving Credit Facility [Member] | Unsecured revolving credit facility, expiring April 2018 [Member] | DTE Electric [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	300
Revolving Credit Facility [Member] | Unsecured revolving credit facility, expiring April 2018 [Member] | DTE Gas [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	300
Commercial Paper [Member]
Line Of Credit Facility [Line Items]
Amounts outstanding	131
Commercial Paper [Member] | DTE Energy [Member]
Line Of Credit Facility [Line Items]
Amounts outstanding	35
Commercial Paper [Member] | DTE Electric [Member]
Line Of Credit Facility [Line Items]
Amounts outstanding	0
Commercial Paper [Member] | DTE Gas [Member]
Line Of Credit Facility [Line Items]
Amounts outstanding	$ 96