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Cash Equivalents and Investments (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Mar. 31, 2025	Sep. 30, 2025	Dec. 31, 2024
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents		$ 2,181	$ 2,408
Short-term investments		78	566
Other assets		1,135	1,166
Certificates of deposit and money market deposit accounts/funds
Cash and Cash Equivalents [Line Items]
Cost		1,228	1,911
Gains/(Losses)	$ 0	0
Fair Value		1,228	1,911
Cash and cash equivalents		1,149	1,345
Short-term investments		78	566
Other assets		1	0
Mutual funds
Cash and Cash Equivalents [Line Items]
Cost		91	88
Gains/(Losses)	$ 10	14
Fair Value		105	98
Cash and cash equivalents		0	0
Short-term investments		0	0
Other assets		$ 105	$ 98

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Amount of cash and cash equivalent. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate.

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Cost of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value.

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