Stock Incentive Plans - Stock appreciation rights activity (Details) - Stock Appreciation Rights (SARs) $ / shares in Units, $ in Millions	12 Months Ended
	Jun. 30, 2024 USD ($) $ / shares shares
Number of Shares
Beginning balance, outstanding (in shares) | shares	3,873,429
Granted (in shares) | shares	519,305
Exercised (in shares) | shares	(877,243)
Canceled (in shares) | shares	(20,708)
Ending balance, outstanding (in shares) | shares	3,494,783
Exercisable (in shares) | shares	2,444,988
Weighted-Average Exercise Price
Beginning balance, outstanding (in USD per share) | $ / shares	$ 199.08
Granted (in USD per share) | $ / shares	406.18
Exercised (in USD per share) | $ / shares	162.31
Canceled (in USD per share) | $ / shares	355.27
Ending balance, outstanding (in USD per share) | $ / shares	238.15
Exercisable (in USD per share) | $ / shares	$ 189.92
Weighted Average Remaining Contractual Term and Aggregate Intrinsic Value
Outstanding, weighted average remaining contractual term	5 years 11 months 15 days
Exercisable, weighted average remaining contractual term	4 years 10 months 20 days
Outstanding, aggregate intrinsic value | $	$ 935.4
Exercisable, aggregate intrinsic value | $	$ 772.3