Retirement Plans and Deferred Compensation Arrangements - Narrative (Details) - Supplemental employee retirement plan - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets	$ 222	$ 203
Defined benefit plan, benefit obligation	$ 170	$ 158

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

- Definition

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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+ Details