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Employee Pension and Other Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 2026

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs

The costs of the Company's defined benefit pension plans and other postretirement benefit plans for the three months ended March 31, 2026 and 2025, were as follows:

						Three Months Ended March 31
						Pension Benefits												Other Benefits
($ in millions)						2026						2025						2026						2025
Components of net periodic benefit cost
Service cost						$	21					$	22					$	1					$	1
Interest cost						85						84						4						4
Expected return on plan assets						(144)						(137)						—						—
Amortization of prior service cost (credit)						4						4						—						—
Amortization of net actuarial loss (gain)						1						—						(3)						(3)
Net periodic benefit (income) cost						$	(33)					$	(27)					$	2					$	2

Schedule of Defined Benefit Plans Disclosures, Cash Contributions

The Company made the following contributions to its defined benefit pension plans and other postretirement benefit plans for the three months ended March 31, 2026 and 2025:

						Three Months Ended March 31
($ in millions)						2026						2025
Pension plans
Discretionary
Qualified						$	1					$	—
Non-qualified						3						4
Other benefit plans						10						9
Total contributions						$	14					$	13

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- Definition

Tabular disclosure of the Company's cash contributions to defined benefit plans.

+ References

No definition available.

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- 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://www.xbrl.org/2009/role/commonPracticeRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (q)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 2: 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

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