Intangible Assets - Carrying Amounts of Identifiable Intangible Assets (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Jul. 31, 2024	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Indefinite-lived intangible assets				$ 17,578
Indefinite-lived intangible assets		$ 17,528		17,528
Finite-lived intangible assets, Beginning balance				680
Total, amortization and impairment expense		(89)	$ (39)	(166)	$ (113)
Finite-lived intangible assets, amortization and impairment expense				(116)
Indefinite-lived intangible assets, amortization and impairment expense	$ (50)			(50)
Finite-lived intangible assets, Ending balance		606		606
Intangible assets, Beginning balance				18,258
Intangible assets, Ending balance		18,134		18,134
Indefinite-lived intangible assets, acquisition				0
Finite-lived intangible assets, acquisition				37
Other indefinite-lived intangible assets		0		0
Other finite-lived intangible assets		5		5
Other, Total		$ 5		$ 5