Financial Instruments - Marketable Securities (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Fair Value	$ 98,407	$ 105,201
Marketable securities	86,868	91,883
Cash	12,509	8,561
Cash and cash equivalents	24,048	21,879
Long-term portion of marketable equity securities	1,400	803
Net Income
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Fair Value	19,490	18,893
Cash and Cash Equivalents	6,918	7,741
Marketable securities	12,572	11,152
Level 2
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Adjusted Cost	80,434	91,087
Gross Unrealized Gains	433	77
Gross Unrealized Losses	(1,950)	(4,856)
Level 2 \| Other Comprehensive Income (Loss)
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Adjusted Cost	80,434	91,087
Gross Unrealized Gains	433	77
Gross Unrealized Losses	(1,950)	(4,856)
Fair Value	78,917	86,308
Cash and Cash Equivalents	4,621	5,577
Marketable securities	74,296	80,731
Level 2 \| Time deposits \| Other Comprehensive Income (Loss)
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Adjusted Cost	2,628	5,297
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	2,628	5,297
Cash and Cash Equivalents	2,628	5,293
Marketable securities	0	4
Level 2 \| Mutual funds \| Net Income
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Fair Value	311	339
Cash and Cash Equivalents	0	0
Marketable securities	311	339
Level 2 \| Government bonds \| Other Comprehensive Income (Loss)
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Adjusted Cost	38,106	41,036
Gross Unrealized Gains	233	64
Gross Unrealized Losses	(679)	(2,045)
Fair Value	37,660	39,055
Cash and Cash Equivalents	1,993	283
Marketable securities	35,667	38,772
Level 2 \| Government bonds \| Net Income
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Fair Value	1,952	1,877
Cash and Cash Equivalents	347	440
Marketable securities	1,605	1,437
Level 2 \| Corporate debt securities \| Other Comprehensive Income (Loss)
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Adjusted Cost	22,457	28,578
Gross Unrealized Gains	112	8
Gross Unrealized Losses	(637)	(1,569)
Fair Value	21,932	27,017
Cash and Cash Equivalents	0	1
Marketable securities	21,932	27,016
Level 2 \| Corporate debt securities \| Net Income
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Fair Value	3,782	3,744
Cash and Cash Equivalents	91	65
Marketable securities	3,691	3,679
Level 2 \| Mortgage-backed and asset-backed securities \| Other Comprehensive Income (Loss)
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Adjusted Cost	17,243	16,176
Gross Unrealized Gains	88	5
Gross Unrealized Losses	(634)	(1,242)
Fair Value	16,697	14,939
Cash and Cash Equivalents	0	0
Marketable securities	16,697	14,939
Level 2 \| Mortgage-backed and asset-backed securities \| Net Income
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Fair Value	2,683	1,686
Cash and Cash Equivalents	0	2
Marketable securities	2,683	1,684
Level 1 \| Money market funds \| Net Income
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Fair Value	6,480	7,234
Cash and Cash Equivalents	6,480	7,234
Marketable securities	0	0
Level 1 \| Current marketable equity securities \| Net Income
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Fair Value	4,282	4,013
Cash and Cash Equivalents	0	0
Marketable securities	$ 4,282	$ 4,013

Cash, Cash Equivalents And Available-For-Sale Debt Securities, Amortized Cost

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Cash, Cash Equivalents, And Marketable Securities

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of investment in marketable security, classified as current.

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