Indebtedness: (Schedule of Fair Value) (Details) $ in Millions	Sep. 30, 2026 USD ($)
Level 1
Debt Instrument [Line Items]
Fair value of outstanding long-term debt	$ 41,004
Level 2
Debt Instrument [Line Items]
Fair value of outstanding long-term debt	$ 1,731

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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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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+ Details