Derivative Instruments and Hedging Activities - Narrative (Details) - USD ($) |
3 Months Ended | ||
---|---|---|---|
Dec. 31, 2023 |
Dec. 31, 2022 |
Sep. 30, 2023 |
|
Derivative [Line Items] | |||
Hedge percentage for foreign exchange transactional exposures, minimum | 70.00% | ||
Hedge percentage for foreign exchange transactional exposures, maximum | 90.00% | ||
Interest rate swaps | |||
Derivative [Line Items] | |||
Derivative, notional amount | $ 600,000,000 | $ 600,000,000 | |
Debt instrument, face amount | 800,000,000 | $ 800,000,000 | |
Net Investment Hedging | |||
Derivative [Line Items] | |||
Pre-tax gains (losses) related to net investment hedges recorded in other comprehensive income | 145,000,000 | $ 269,000,000 | |
Pre-tax gains (losses) related to net investment hedges reclassified from other comprehensive income | $ 0 | $ 0 |