Asset Retirement Obligations (Rollforward) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] | |||
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 |
DTE Electric | |||
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] | |||
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 |