Stock-Based Compensation (Details Textuals)	12 Months Ended
	Dec. 31, 2015 USD ($) shares	Dec. 31, 2014 USD ($) shares	Dec. 31, 2013 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized limit of common stock shares	14,500,000
Performance units price per unit	1.00
Remaining contractual term (in years)	2 years 9 months 20 days
Options vested (in shares)	0
Options grants in period (in shares)	0	0	0
Options, exercises, intrinsic value | $	$ 7,000,000	$ 11,000,000	$ 12,000,000
Stock option expense | $	$ 0	0	0
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum award per employee	500,000
Award expiration period	10 years
Award vesting period	3 years
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum award per employee	150,000
Award vesting period	3 years
Compensation cost charged against income (in millions) | $	$ 10,000,000	10,000,000	23,000,000
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum award per employee	300,000
Award vesting period	3 years
Performance Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum award per employee	1,000,000
DTE Electric | DTE Energy
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost charged against income (in millions) | $	$ 21,000,000	$ 62,000,000	$ 58,000,000