Fair Value of Financial Instruments - Schedule of Cash, Cash Equivalents and Marketable Securities (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Marketable Securities [Line Items]
Adjusted Cost	$ 33,641	$ 29,098
Gross Unrealized Gains	9	3
Gross Unrealized Losses	(2)	(7)
Fair Value	33,648	29,094
Cash and Cash Equivalents
Marketable Securities [Line Items]
Fair Value	18,111	16,398
Short-Term Investments
Marketable Securities [Line Items]
Fair Value	15,537	12,696
Cash
Marketable Securities [Line Items]
Adjusted Cost	13,784	15,903
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	13,784	15,903
Cash \| Cash and Cash Equivalents
Marketable Securities [Line Items]
Fair Value	13,784	15,903
Cash \| Short-Term Investments
Marketable Securities [Line Items]
Fair Value	0	0
Certificates of deposit and time deposits
Marketable Securities [Line Items]
Adjusted Cost	10,327	6,995
Gross Unrealized Gains	2	1
Gross Unrealized Losses	0	0
Fair Value	10,329	6,996
Certificates of deposit and time deposits \| Cash and Cash Equivalents
Marketable Securities [Line Items]
Fair Value	600	0
Certificates of deposit and time deposits \| Short-Term Investments
Marketable Securities [Line Items]
Fair Value	9,729	6,996
Commercial paper
Marketable Securities [Line Items]
Adjusted Cost	4,160	470
Gross Unrealized Gains	3	0
Gross Unrealized Losses	(1)	0
Fair Value	4,162	470
Commercial paper \| Cash and Cash Equivalents
Marketable Securities [Line Items]
Fair Value	945	109
Commercial paper \| Short-Term Investments
Marketable Securities [Line Items]
Fair Value	3,217	361
U.S. government securities
Marketable Securities [Line Items]
Adjusted Cost	3,391	5,136
Gross Unrealized Gains	3	1
Gross Unrealized Losses	(1)	(1)
Fair Value	3,393	5,136
U.S. government securities \| Cash and Cash Equivalents
Marketable Securities [Line Items]
Fair Value	998	277
U.S. government securities \| Short-Term Investments
Marketable Securities [Line Items]
Fair Value	2,395	4,859
Corporate debt securities
Marketable Securities [Line Items]
Adjusted Cost	195	485
Gross Unrealized Gains	1	1
Gross Unrealized Losses	0	(6)
Fair Value	196	480
Corporate debt securities \| Cash and Cash Equivalents
Marketable Securities [Line Items]
Fair Value	0	0
Corporate debt securities \| Short-Term Investments
Marketable Securities [Line Items]
Fair Value	196	480
Money market funds
Marketable Securities [Line Items]
Adjusted Cost	1,784	109
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	1,784	109
Money market funds \| Cash and Cash Equivalents
Marketable Securities [Line Items]
Fair Value	1,784	109
Money market funds \| Short-Term Investments
Marketable Securities [Line Items]
Fair Value	$ 0	$ 0

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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