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Cash Equivalents and Investments (Detail) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 2,642	$ 2,130
Short-term investments	573	63
Other assets	1,086	1,138
Certificates of deposit and money market deposit accounts/funds
Cash and Cash Equivalents [Line Items]
Cost	1,691	1,178
Gains/(Losses)	0	0
Fair Value	1,691	1,178
Cash and cash equivalents	1,117	1,112
Short-term investments	573	63
Other assets	1	3
Mutual funds
Cash and Cash Equivalents [Line Items]
Cost	101	91
Gains/(Losses)	11	6
Fair Value	112	97
Cash and cash equivalents	0	0
Short-term investments	0	0
Other assets	$ 112	$ 97

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