Derivative Instruments And Hedging Activities - Schedule of Notional Amount of Net Investment Hedges (Detail) - Designated as Hedging Instrument - Currency Swap € in Millions	Sep. 30, 2023 EUR (€)
Net Investment Hedging
Derivative [Line Items]
Notional Amount	€ 2,903
2026
Derivative [Line Items]
Notional Amount	450
2027
Derivative [Line Items]
Notional Amount	531
2028
Derivative [Line Items]
Notional Amount	588
2029
Derivative [Line Items]
Notional Amount	373
2031
Derivative [Line Items]
Notional Amount	481
2032
Derivative [Line Items]
Notional Amount	€ 480