Financial Instruments: (Fair Value of Foreign Exchange Contracts) (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Derivatives, Fair Value [Line Items]
Gross amounts not offset in the consolidated balance sheet, derivative assets - financial instruments	$ (444)	$ (218)
Gross amounts not offset in the consolidated balance sheet, derivative assets - cash collateral received/pledged	(183)	(863)
Gross amounts not offset in the consolidated balance sheet, derivative assets, total	26	337
Gross amounts not offset in the consolidated balance sheet, derivative liabilities - financial instruments	(444)	(218)
Gross amounts not offset in the consolidated balance sheet, derivative liabilities - cash collateral received/pledged	(1,374)	(18)
Gross amounts not offset in the consolidated balance sheet, derivative liabilities, total	157	11
Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	653	1,418
Fair value of derivative liabilities	1,975	247
Foreign exchange contracts \| Foreign exchange contracts \| Other current assets \| Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	378	772
Foreign exchange contracts \| Foreign exchange contracts \| Other accrued liabilities \| Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	499	7
Foreign exchange contracts \| Foreign exchange contracts \| Other assets \| Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	107	299
Foreign exchange contracts \| Foreign exchange contracts \| Other liabilities \| Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	853	60
Foreign exchange contracts \| Foreign exchange contracts \| Other current assets \| Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	91	331
Foreign exchange contracts \| Foreign exchange contracts \| Other accrued liabilities \| Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	319	69
Foreign exchange contracts \| Foreign exchange contracts \| Other assets \| Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0	12
Foreign exchange contracts \| Foreign exchange contracts \| Other liabilities \| Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	276	58
Interest rate contracts \| Foreign exchange contracts \| Other current assets \| Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0	0
Interest rate contracts \| Foreign exchange contracts \| Other accrued liabilities \| Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	27	50
Interest rate contracts \| Foreign exchange contracts \| Other assets \| Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	77	4
Interest rate contracts \| Foreign exchange contracts \| Other liabilities \| Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	0	3
Commodity contracts \| Foreign exchange contracts \| Other current assets \| Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0	0
Commodity contracts \| Foreign exchange contracts \| Other accrued liabilities \| Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	1	0
Commodity contracts \| Foreign exchange contracts \| Other assets \| Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0	0
Commodity contracts \| Foreign exchange contracts \| Other liabilities \| Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	$ 0	$ 0

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