Stock-Based Compensation (Components of Stock Based Compensation) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Components of stock based-compensation [Abstract]
Compensation expense	$ 103	$ 99	$ 83
Employee Service Share-based Compensation Equity and Liability, Tax	40	38	33
Employee Service Share-based Compensation, Allocation of Recognized Period Costs Liability and Equity, Capitalized Amount	$ 16	$ 15	$ 5

Represents the compensation cost capitalized during the period arising from liability and equity-based compensation arrangements (for example, shares of stock, units, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

No definition available.

Name:	dte_EmployeeServiceSharebasedCompensationAllocationofRecognizedPeriodCostsLiabilityandEquityCapitalizedAmount
Namespace Prefix:	dte_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration