Consolidated Statements of Financial Position (Unaudited) (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Allowance for doubtful accounts	$ 56	$ 54
Shareholder’s Equity
Common stock, par value (in dollars per share)
Common stock, shares authorized (in shares)	400,000,000	400,000,000
Common stock, shares issued (in shares)	179,475,625	176,991,231
Common stock, shares outstanding (in shares)	179,475,625	176,991,231
DTE Electric
Allowance for doubtful accounts	$ 29	$ 29
Shareholder’s Equity
Common stock, par value (in dollars per share)	$ 10	$ 10
Common stock, shares authorized (in shares)	400,000,000	400,000,000
Common stock, shares issued (in shares)	138,632,324	138,632,324
Common stock, shares outstanding (in shares)	138,632,324	138,632,324