Financial Instruments: (Fair Value of Foreign Exchange Contracts) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Derivatives, Fair Value [Line Items]
Gross amounts not offset in the consolidated balance sheet, derivative assets - financial instruments	$ (218)	$ (374)
Gross amounts not offset in the consolidated balance sheet, derivative assets - cash collateral received/pledged	(863)	(109)
Gross amounts not offset in the consolidated balance sheet, derivative assets, total	337	101
Gross amounts not offset in the consolidated balance sheet, derivative liabilities - financial instruments	(218)	(374)
Gross amounts not offset in the consolidated balance sheet, derivative liabilities - cash collateral received/pledged	(18)	(551)
Gross amounts not offset in the consolidated balance sheet, derivative liabilities, total	11	443
Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	1,418	584
Fair value of derivative liabilities	247	1,368
Foreign exchange contracts \| Foreign exchange contracts \| Other current assets \| Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	772	345
Foreign exchange contracts \| Foreign exchange contracts \| Other accrued liabilities \| Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	7	249
Foreign exchange contracts \| Foreign exchange contracts \| Other assets \| Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	299	153
Foreign exchange contracts \| Foreign exchange contracts \| Income taxes and other liabilities \| Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	60	449
Foreign exchange contracts \| Foreign exchange contracts \| Other current assets \| Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	331	85
Foreign exchange contracts \| Foreign exchange contracts \| Other accrued liabilities \| Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	69	425
Foreign exchange contracts \| Foreign exchange contracts \| Other assets \| Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	12	0
Foreign exchange contracts \| Foreign exchange contracts \| Income taxes and other liabilities \| Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	58	143
Interest rate contracts \| Foreign exchange contracts \| Other current assets \| Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0	1
Interest rate contracts \| Foreign exchange contracts \| Other accrued liabilities \| Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	50	78
Interest rate contracts \| Foreign exchange contracts \| Other assets \| Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	4	0
Interest rate contracts \| Foreign exchange contracts \| Income taxes and other liabilities \| Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	3	18
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	0	5
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 \| Income taxes and other liabilities \| Level 2
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	$ 0	$ 1

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