Consolidated Statements of Financial Position (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Current Assets:
Allowance for doubtful accounts	$ 104	$ 91
Stockholders' Equity:
Common stock, shares authorized (in shares)	400,000,000	400,000,000
Common stock, shares issued (in shares)	193,770,617	192,208,533
Common stock, shares outstanding (in shares)	193,770,617	192,208,533
DTE Electric
Current Assets:
Allowance for doubtful accounts	$ 57	$ 46
Stockholders' 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