Long-Term Debt and Credit Arrangements - Letters of Credit, Narrative (Details) - Line of Credit - Letters of Credit - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Letters of credit outstanding	$ 1,900	$ 1,400
Letters of credit outstanding that will reduce the available credit under facilities	$ 343	$ 354

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