Fair Value of Financial Instruments - Schedule of Cash, Cash Equivalents and Investments Classified by Security Type (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Marketable Securities [Line Items]
Adjusted Cost	$ 36,780	$ 36,549
Gross Unrealized Gains	4	15
Gross Unrealized Losses	(2)	(1)
Fair Value	36,782	36,563
Cash and Cash Equivalents
Marketable Securities [Line Items]
Fair Value	15,587	16,139
Short-Term Investments
Marketable Securities [Line Items]
Fair Value	21,195	20,424
Cash
Marketable Securities [Line Items]
Adjusted Cost	14,624	14,386
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	14,624	14,386
Cash \| Cash and Cash Equivalents
Marketable Securities [Line Items]
Fair Value	14,624	14,386
Cash \| Short-Term Investments
Marketable Securities [Line Items]
Fair Value	0	0
Certificates of deposit and time deposits
Marketable Securities [Line Items]
Adjusted Cost	14,430	12,767
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	14,430	12,767
Certificates of deposit and time deposits \| Cash and Cash Equivalents
Marketable Securities [Line Items]
Fair Value	0	0
Certificates of deposit and time deposits \| Short-Term Investments
Marketable Securities [Line Items]
Fair Value	14,430	12,767
Commercial paper
Marketable Securities [Line Items]
Adjusted Cost	3,107	3,908
Gross Unrealized Gains	3	11
Gross Unrealized Losses	0	0
Fair Value	3,110	3,919
Commercial paper \| Cash and Cash Equivalents
Marketable Securities [Line Items]
Fair Value	0	0
Commercial paper \| Short-Term Investments
Marketable Securities [Line Items]
Fair Value	3,110	3,919
U.S. government securities
Marketable Securities [Line Items]
Adjusted Cost	3,609	3,618
Gross Unrealized Gains	1	3
Gross Unrealized Losses	(2)	(1)
Fair Value	3,608	3,620
U.S. government securities \| Cash and Cash Equivalents
Marketable Securities [Line Items]
Fair Value	0	0
U.S. government securities \| Short-Term Investments
Marketable Securities [Line Items]
Fair Value	3,608	3,620
Corporate debt securities
Marketable Securities [Line Items]
Adjusted Cost	47	117
Gross Unrealized Gains	0	1
Gross Unrealized Losses	0	0
Fair Value	47	118
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	47	118
Money market funds
Marketable Securities [Line Items]
Adjusted Cost	963	1,753
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	963	1,753
Money market funds \| Cash and Cash Equivalents
Marketable Securities [Line Items]
Fair Value	963	1,753
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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