Pension and Other Postretirement Benefits - Additional Information (Details) - Pension Benefits - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Defined Benefit Plan Disclosure [Line Items]
Company contributions	$ 11	$ 11	$ 33	$ 33
Expected contributions, remainder of fiscal year	$ 11		$ 11

Amount of contribution received by defined benefit plan from employer which increases plan assets.

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+ Details

- Definition

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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