Restructuring Activities: (Movement in Exit Cost Liabilities) (Details) $ in Millions	12 Months Ended
Dec. 31, 2025 USD ($)
Movement in exit cost liabilities
Liability balance, January 1, 2025	$ 28
Charges, net	$ 149
Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration]	Marketing, administration and research costs (Notes 3, 4, 11 & 18)
Cash spent	$ (35)
Currency/other	(27)
Liability balance, December 31, 2025	$ 115

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Indicates line item in statement of income or comprehensive income that includes restructuring charges.

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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Amount of increase (decrease) in the restructuring reserve related to foreign currency translation (gain) loss and other increases (decreases).

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