Stock Incentive Plans - Stock appreciation rights activity (Details) - SARs $ / shares in Units, $ in Millions	12 Months Ended
	Jun. 30, 2019 USD ($) $ / shares shares
Number of Shares
Beginning balance, outstanding (in shares) | shares	6,046,881
Granted (in shares) | shares	748,901
Exercised (in shares) | shares	(983,205)
Canceled (in shares) | shares	(63,122)
Ending balance, outstanding (in shares) | shares	5,749,455
Exercisable (in shares) | shares	4,088,257
Weighted-Average Exercise Price
Beginning balance, outstanding (in USD per share) | $ / shares	$ 106.98
Granted (in USD per share) | $ / shares	166.49
Exercised (in USD per share) | $ / shares	77.28
Canceled (in USD per share) | $ / shares	154.93
Ending balance, outstanding (in USD per share) | $ / shares	119.29
Exercisable (in USD per share) | $ / shares	$ 105.15
Weighted Average Remaining Contractual Term and Aggregate Intrinsic Value
Outstanding, weighted average remaining contractual term	5 years 9 months 18 days
Exercisable, weighted average remaining contractual term	4 years 9 months 18 days
Outstanding, aggregate intrinsic value | $	$ 291.6
Exercisable, aggregate intrinsic value | $	$ 265.2