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Hedging Activities - Summary of Foreign Currency Gains and (Losses) from Non-Derivative Instruments (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Derivatives designated for hedge accounting | Net Investment Hedges | Euro Denominated Notes |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Euro-denominated notes | $ 0 | $ 75 | $ 0 | $ 139

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- Definition Amount, before tax, of reclassification from accumulated other comprehensive income (AOCI) for gain (loss) from derivative designated and qualifying as net investment hedge. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4CCC -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4CCC + Details
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