Consolidated Statements of Financial Position (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Current Assets:
Allowance for doubtful accounts	$ 91	$ 49
Stockholders' Equity:
Common stock, shares authorized (in shares)	400,000,000	400,000,000
Common stock, shares issued (in shares)	181,925,281	179,386,967
Common stock, shares outstanding (in shares)	181,925,281	179,386,967
DTE Electric
Current Assets:
Allowance for doubtful accounts	$ 53	$ 31
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)	138,632,234	138,632,234
Common stock, shares outstanding (in shares)	138,632,234	138,632,234