XML 59 R41.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Retirement Benefits and Trusteed Assets (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2024
Retirement Benefits [Abstract] |
Schedule of Net Periodic Benefit Costs (Credits) | The following table details the components of net periodic benefit costs (credits) for pension benefits and other postretirement benefits for DTE Energy:
| Pension Benefits |  | Other Postretirement Benefits
| 2024 |  | 2023 |  | 2024 |  | 2023
| (In millions)
Three Months Ended March 31, |  |  |  |  |  |  |
Service cost | $ | 14 |  |  | $ | 14 |  |  | $ | 4 |  |  | $ | 4 |
Interest cost | 52 |  |  | 54 |  |  | 16 |  |  | 16 |
Expected return on plan assets | (85) |  |  | (88) |  |  | (30) |  |  | (28) |
Amortization of: |  |  |  |  |  |  |
Net actuarial loss | 15 |  |  | 2 |  |  | 2 |  |  | 3 |
Prior service credit | (1) |  |  | (1) |  |  | (3) |  |  | (4) |
Settlements | — |  |  | 2 |  |  | — |  |  | — |
Net periodic benefit credit | $ | (5) |  |  | $ | (17) |  |  | $ | (11) |  |  | $ | (9) |
The following table details the components of net periodic benefit costs (credits) for other postretirement benefits for DTE Electric:
|  |  | Three Months Ended March 31,
|  |  |  |  | 2024 |  | 2023
|  |  |  |  | (In millions)
Service cost |  |  |  |  | $ | 3 |  |  | $ | 3 |
Interest cost |  |  |  |  | 12 |  |  | 12 |
Expected return on plan assets |  |  |  |  | (20) |  |  | (18) |
Amortization of: |  |  |  |  |  |  |
Prior service credit |  |  |  |  | (1) |  |  | (3) |
Net periodic benefit credit |  |  |  |  | $ | (6) |  |  | $ | (6) |

X
- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_ScheduleOfNetBenefitCostsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration