Fair Value Measurements and Investments - Additional Information (Detail) - USD ($)		3 Months Ended
	Feb. 01, 2023	Dec. 31, 2023	Dec. 31, 2022	Sep. 30, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized gains (losses) on equity securities held as of the end of the period		$ 36,000,000	$ (102,000,000)
Impairment of indefinite-lived intangible assets and goodwill	$ 0
Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value of debt		20,700,000,000		$ 20,500,000,000
Estimated Fair Value | Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of debt		$ 19,000,000,000		$ 17,700,000,000