Financial Instruments - Marketable Securities (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Fair Value	$ 105,201	$ 131,353
Marketable securities	91,883	118,704
Cash	8,561	8,296
Cash and cash equivalents	21,879	20,945
Long-term portion of marketable equity securities	803	1,400
Net Income
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Fair Value	18,893	18,523
Cash and Cash Equivalents	7,741	7,499
Marketable securities	11,152	11,024
Level 2
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Adjusted Cost	91,087	112,855
Gross Unrealized Gains	77	548
Gross Unrealized Losses	(4,856)	(573)
Level 2 \| Other Comprehensive Income (Loss)
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Adjusted Cost	91,087	112,855
Gross Unrealized Gains	77	548
Gross Unrealized Losses	(4,856)	(573)
Fair Value	86,308	112,830
Cash and Cash Equivalents	5,577	5,150
Marketable securities	80,731	107,680
Level 2 \| Time deposits \| Other Comprehensive Income (Loss)
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Adjusted Cost	5,297	5,133
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	5,297	5,133
Cash and Cash Equivalents	5,293	5,133
Marketable securities	4	0
Level 2 \| Mutual funds \| Net Income
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Fair Value	339	351
Cash and Cash Equivalents	0	0
Marketable securities	339	351
Level 2 \| Government bonds \| Other Comprehensive Income (Loss)
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Adjusted Cost	41,036	53,288
Gross Unrealized Gains	64	258
Gross Unrealized Losses	(2,045)	(238)
Fair Value	39,055	53,308
Cash and Cash Equivalents	283	5
Marketable securities	38,772	53,303
Level 2 \| Government bonds \| Net Income
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Fair Value	1,877	1,165
Cash and Cash Equivalents	440	0
Marketable securities	1,437	1,165
Level 2 \| Corporate debt securities \| Other Comprehensive Income (Loss)
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Adjusted Cost	28,578	35,605
Gross Unrealized Gains	8	194
Gross Unrealized Losses	(1,569)	(223)
Fair Value	27,017	35,576
Cash and Cash Equivalents	1	12
Marketable securities	27,016	35,564
Level 2 \| Corporate debt securities \| Net Income
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Fair Value	3,744	2,503
Cash and Cash Equivalents	65	0
Marketable securities	3,679	2,503
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	16,176	18,829
Gross Unrealized Gains	5	96
Gross Unrealized Losses	(1,242)	(112)
Fair Value	14,939	18,813
Cash and Cash Equivalents	0	0
Marketable securities	14,939	18,813
Level 2 \| Mortgage-backed and asset-backed securities \| Net Income
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Fair Value	1,686	1,007
Cash and Cash Equivalents	2	0
Marketable securities	1,684	1,007
Level 1 \| Money market funds \| Net Income
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Fair Value	7,234	7,499
Cash and Cash Equivalents	7,234	7,499
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	4,013	5,998
Cash and Cash Equivalents	0	0
Marketable securities	$ 4,013	$ 5,998

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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