Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2020

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Change in Asset Retirement Obligations

Changes to asset retirement obligations for 2020, 2019, and 2018 were as follows:

	2020		2019		2018
DTE Energy	(In millions)
Asset retirement obligations at January 1	$	2,672	$	2,469	$	2,320
Accretion	157		149		140
Liabilities incurred	25		20		27
Liabilities settled	(14)		(17)		(16)
Revision in estimated cash flows	(1)		51		(2)
Asset retirement obligations at December 31	$	2,839	$	2,672	$	2,469

	2020		2019		2018
DTE Electric	(In millions)
Asset retirement obligations at January 1	$	2,447	$	2,271	$	2,125
Accretion	145		138		129
Liabilities incurred	18		1		27
Liabilities settled	(8)		(14)		(8)
Revision in estimated cash flows	5		51		(2)
Asset retirement obligations at December 31	$	2,607	$	2,447	$	2,271