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Short-term Financing - Schedule of Commercial Paper Program and Reverse Repurchase Agreements (Details) - USD ($) $ in Billions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2026 | Mar. 31, 2025 | Mar. 31, 2026 | Mar. 31, 2025
Commercial Paper Program |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Average outstanding balances (in billions) | $ 3.8 | $ 3.3 | $ 4.2 | $ 4.2
Weighted average interest rates | 3.70% | 4.40% | 4.10% | 4.90%
Weighted average maturity (approximately in days) | 2 days | 2 days | 2 days | 2 days
Reverse repurchase agreements |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Average outstanding balances (in billions) | $ 1.1 | $ 0.9 | $ 3.3 | $ 2.8
Weighted average interest rates | 3.80% | 4.10% | 4.20% | 4.90%

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