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Derivative Instruments and Hedging Activities - Net Investment Hedges (Detail)
€ in Millions, ¥ in Billions
3 Months Ended 6 Months Ended
Dec. 31, 2021
EUR (€)
Dec. 31, 2021
JPY (¥)
Mar. 31, 2022
EUR (€)
Mar. 31, 2022
JPY (¥)
Foreign Currency Denominated Debt [Member]        
Derivative [Line Items]        
Notional amount € 2,300 ¥ 25 € 2,300 ¥ 25