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Derivative Instruments - Narrative (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Jun. 30, 2023
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Interest rate swaps |  |
Derivative [Line Items] |  |
Derivative, notional amount | $ 1,200 | $ 1,200
Derivative, average fixed interest rate | 3.88% |
Interest rate swaps | Receive variable/pay fixed |  |
Derivative [Line Items] |  |
Derivative, notional amount | $ 0 | 0
Interest rate swaps | Received fixed/pay variable | Fair value hedging |  |
Derivative [Line Items] |  |
Derivative, notional amount | 650 | 650
Forward exchange contracts |  |
Derivative [Line Items] |  |
Derivative, notional amount | $ 441 | $ 462

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