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Employee Retirement Benefits (Tables)

3 Months Ended

Mar. 31, 2025

Retirement Benefits [Abstract]

Schedule of Defined Benefit Plans Disclosures

The following summarizes the components of net periodic benefit for our qualified and supplemental pension plans:

(Dollars in millions)												Three months ended March 31,
																		2025						2024
Service cost																		$	1					$	1
Non-service (benefit) costs:
Interest cost																		4						3
Expected return on plan assets																		(6)						(5)
Amortization of actuarial gain and prior service cost																		(1)						—
Total non-service benefit																		(3)						(2)
Net periodic benefit																		$	(2)					$	(1)

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- References

No definition available.

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- Definition

Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans.

+ References

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-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
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