Hedging Activities - Schedule of Gains (Losses) From Derivatives Included in Other Comprehensive Income (Loss) (Details) - Derivatives designated for hedge accounting - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Cross-currency swaps | Net Investment Hedging | ||
| Derivatives, Fair Value [Line Items] | ||
| Derivatives designated as net investment hedges: | $ 81 | $ (233) |
| Cross-currency swaps | Cash Flow Hedges | ||
| Derivatives, Fair Value [Line Items] | ||
| Derivatives designated as cash flow and other hedges: | 7 | 5 |
| Interest rate swap locks, Foreign currency forwards and Other | Cash Flow Hedges | ||
| Derivatives, Fair Value [Line Items] | ||
| Derivatives designated as cash flow and other hedges: | $ 0 | $ 14 |