Short-Term Financing - Commercial Paper and Reverse Repurchase Agreements (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Commercial Paper
Short-term Debt [Line Items]
Short-term debt, average outstanding amount	$ 3,400.0	$ 2,000.0
Weighted average interest rates	3.70%	0.40%
Weighted average maturity (approximately in days)	2 days	1 day
Reverse Repurchase Agreements
Short-term Debt [Line Items]
Short-term debt, average outstanding amount	$ 1,279.9	$ 299.6
Weighted average interest rates	4.30%	0.70%