Cash Equivalents and Investments (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 1,769	$ 1,811
Short-term investments	90	91
Other assets	1,092	1,034
Certificates of deposit and money market deposit accounts
Cash and Cash Equivalents [Line Items]
Cost	914	691
Gross Unrealized Gains	0	0
Fair Value	914	691
Cash and cash equivalents	808	584
Short-term investments	90	91
Other assets	16	16
Mutual funds
Cash and Cash Equivalents [Line Items]
Cost	71	65
Gross Unrealized Gains	0	8
Fair Value	71	73
Cash and cash equivalents	0	0
Short-term investments	0	0
Other assets	$ 71	$ 73