Stock Incentive Plans - Stock appreciation rights activity (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Jun. 30, 2017 USD ($) $ / shares shares
Number of Shares
Beginning balance, outstanding (in shares) | shares	8,056,448
Granted (in shares) | shares	1,065,739
Exercised (in shares) | shares	(2,510,398)
Canceled (in shares) | shares	(78,383)
Ending balance, outstanding (in shares) | shares	6,533,406
Exercisable (in shares) | shares	4,585,837
Weighted-Average Exercise Price
Beginning balance, outstanding (in USD per share) | $ / shares	$ 84.93
Granted (in USD per share) | $ / shares	124.36
Exercised (in USD per share) | $ / shares	76.58
Canceled (in USD per share) | $ / shares	117.28
Ending balance, outstanding (in USD per share) | $ / shares	94.18
Exercisable (in USD per share) | $ / shares	$ 83.62
Weighted Average Remaining Contractual Term and Aggregate Intrinsic Value
Outstanding, weighted average remaining contractual term	5 years 8 months 12 days
Exercisable, weighted average remaining contractual term	4 years 6 months
Outstanding, aggregate intrinsic value | $	$ 428.8
Exercisable, aggregate intrinsic value | $	$ 349.4