STOCK-BASED COMPENSATION - Schedule of Incentive Awards (Details) $ / shares in Units, $ in Millions	3 Months Ended	9 Months Ended
	Mar. 31, 2026 USD ($) $ / shares shares	Mar. 31, 2026 USD ($) $ / shares shares
Weighted- Average Grant Date Fair Value
Intrinsic values of stock options exercised | $	$ 2.4	$ 28.8
Closing stock price (in dollars per share) | $ / shares	$ 162.48	$ 162.48
Outstanding vested and currently exercisable stock options (in shares)	1,200,000	1,200,000
Exercisable stock options, aggregate intrinsic value | $	$ 29.0	$ 29.0
Exercisable stock options, weighted average exercise price (in dollars per share) | $ / shares	$ 148.64	$ 148.64
Exercisable stock options, weighted average remaining contractual life	5 years 4 months 24 days
Stock options outstanding, weighted-average remaining contractual life	7 years
Stock Options
Number of Options
Beginning balance (in shares)	1,723,731	1,917,328
Granted (in shares)	525,517	539,247
Exercise of stock options (in shares)	(32,438)	(203,037)
Expired/forfeited (in shares)	0	(36,728)
Ending balance (in shares)	2,216,810	2,216,810
Weighted- Average Exercise Price
Beginning balance (in dollars per share) | $ / shares	$ 163.78	$ 157.97
Granted (in dollars per share) | $ / shares	190.89	191.77
Exercise of stock options (in dollars per share) | $ / shares	108.54	104.22
Expired/forfeited (in dollars per share) | $ / shares	0	163.64
Ending balance (in dollars per share) | $ / shares	$ 171.02	$ 171.02
Time-based Restricted Stock Units
Number of Options
Beginning balance of RSUs (in shares)	759,447	590,603
Granted RSUs (in shares)	12,154	239,740
Vesting of restricted stock units (in shares)	(5,011)	(46,919)
Expired/forfeited RSUs (in shares)	(6,355)	(23,189)
Ending balance of RSUs (in shares)	760,235	760,235
Weighted- Average Grant Date Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 192.97	$ 178.58
Granted (in dollars per share) | $ / shares	185.63	222.73
Vesting of restricted stock units (in dollars per share) | $ / shares	204.45	166.70
Expired/forfeited (in dollars per share) | $ / shares	200.65	195.89
Ending balance (in dollars per share) | $ / shares	$ 192.71	$ 192.71
Restricted stock units expected to vest (in shares)	600,000	600,000
Restricted stock units, aggregate intrinsic value | $	$ 116.5	$ 116.5
Performance-based Restricted Stock Units
Number of Options
Beginning balance of RSUs (in shares)	263,920	179,113
Granted RSUs (in shares)	5,227	101,259
Vesting of restricted stock units (in shares)	0	(7,698)
Expired/forfeited RSUs (in shares)	0	(3,527)
Ending balance of RSUs (in shares)	269,147	269,147
Weighted- Average Grant Date Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 201.29	$ 189.69
Granted (in dollars per share) | $ / shares	177.88	221.28
Vesting of restricted stock units (in dollars per share) | $ / shares	0	211.26
Expired/forfeited (in dollars per share) | $ / shares	0	199.45
Ending balance (in dollars per share) | $ / shares	$ 200.83	$ 200.83
Restricted stock units expected to vest (in shares)	300,000	300,000
Restricted stock units, aggregate intrinsic value | $	$ 41.5	$ 41.5