Short-Term Financing - Commercial Paper and Reverse Repurchase Agreements (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Commercial Paper
Short-term Debt [Line Items]
Short-term debt, average outstanding amount	$ 2,000.0	$ 1,600.0
Weighted average interest rates	0.40%	0.10%
Weighted average maturity (approximately in days)	1 day	1 day
Reverse Repurchase Agreements
Short-term Debt [Line Items]
Short-term debt, average outstanding amount	$ 299.6	$ 136.7
Weighted average interest rates	0.70%	0.20%