Financial Instruments: (Fair Value of Foreign Exchange Contracts) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	$ 584	$ 873
Gross amounts not offset in the consolidated balance sheet, derivative assets - financial instruments	(374)	(346)
Gross amounts not offset in the consolidated balance sheet, derivative assets - cash collateral received/pledged	(109)	(341)
Gross amounts not offset in the consolidated balance sheet, derivative assets, total	101	186
Fair value of derivative liabilities	1,368	537
Gross amounts not offset in the consolidated balance sheet, derivative liabilities - financial instruments	(374)	(346)
Gross amounts not offset in the consolidated balance sheet, derivative liabilities - cash collateral received/pledged	(551)	(48)
Gross amounts not offset in the consolidated balance sheet, derivative liabilities, total	443	143
Foreign exchange contracts \| Foreign exchange contracts \| Other current assets
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	345	376
Foreign exchange contracts \| Foreign exchange contracts \| Other accrued liabilities
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	249	126
Foreign exchange contracts \| Foreign exchange contracts \| Other assets
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	153	341
Foreign exchange contracts \| Foreign exchange contracts \| Income taxes and other liabilities
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	449	147
Foreign exchange contracts \| Foreign exchange contracts \| Other current assets
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	85	156
Foreign exchange contracts \| Foreign exchange contracts \| Other accrued liabilities
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	425	165
Foreign exchange contracts \| Foreign exchange contracts \| Other assets
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0	0
Foreign exchange contracts \| Foreign exchange contracts \| Income taxes and other liabilities
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	143	16
Interest rate contracts \| Foreign exchange contracts \| Other current assets
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	1	0
Interest rate contracts \| Foreign exchange contracts \| Other accrued liabilities
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	78	27
Interest rate contracts \| Foreign exchange contracts \| Other assets
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0	0
Interest rate contracts \| Foreign exchange contracts \| Income taxes and other liabilities
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	18	56
Commodity contracts \| Foreign exchange contracts \| Other current assets
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0	0
Commodity contracts \| Foreign exchange contracts \| Other accrued liabilities
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	5	0
Commodity contracts \| Foreign exchange contracts \| Other assets
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0	0
Commodity contracts \| Foreign exchange contracts \| Income taxes and other liabilities
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	$ 1	$ 0

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