Stock Incentive Plans - Schedule of Fair Value Information (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
RSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value of Awards Vested	$ 30	$ 29	$ 32
Weighted-Average Grant Date Fair Value (in USD per share)	$ 582.76	$ 401.86	$ 297.43
LTIP awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value of Awards Vested	$ 64	$ 45	$ 58
Weighted-Average Grant Date Fair Value (in USD per share)	$ 465.01	$ 380.97	$ 301.64