Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2021

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Change in Asset Retirement Obligations

Changes to asset retirement obligations for 2021, 2020, and 2019 were as follows:

	2021		2020		2019
DTE Energy	(In millions)
Asset retirement obligations at January 1	$	2,829	$	2,656	$	2,463
Accretion	167		156		148
Liabilities incurred	28		24		11
Liabilities settled	(30)		(13)		(17)
Revision in estimated cash flows	168		6		51
Asset retirement obligations at December 31	$	3,162	$	2,829	$	2,656

	2021		2020		2019
DTE Electric	(In millions)
Asset retirement obligations at January 1	$	2,607	$	2,447	$	2,271
Accretion	155		145		138
Liabilities incurred	29		18		1
Liabilities settled	(27)		(8)		(14)
Revision in estimated cash flows	168		5		51
Asset retirement obligations at December 31	$	2,932	$	2,607	$	2,447