Derivative Instruments and Hedging Activities - Net Investment Hedges (Detail) € in Millions, ¥ in Billions	3 Months Ended	12 Months Ended
Dec. 31, 2021 EUR (€)	Dec. 31, 2021 JPY (¥)	Sep. 30, 2021 EUR (€)	Sep. 30, 2021 JPY (¥)
Foreign Currency Denominated Debt [Member]
Derivative [Line Items]
Notional amount	€ 2,300	¥ 25	€ 2,300	¥ 25

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_DerivativeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration