Stock-Based Compensation - Schedule of Incentive Awards (Details) $ / shares in Units, $ in Millions	3 Months Ended	6 Months Ended
	Dec. 31, 2023 USD ($) $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares
Weighted-Average Grant Date Fair Value
Stock options exercised during period, aggregate intrinsic value | $	$ 6.0	$ 43.0
Closing stock price (in dollars per share) | $ / shares	$ 205.75	$ 205.75
Outstanding vested and currently exercisable stock options (in shares)	1,200,000	1,200,000
Exercisable stock options, aggregate intrinsic value | $	$ 123.6	$ 123.6
Exercisable stock options, weighted average exercise price (in dollars per share) | $ / shares	$ 104.00	$ 104.00
Exercisable stock options, weighted average remaining contractual life		4 years 7 months 6 days
Stock options outstanding, weighted-average remaining contractual life		6 years 3 months 18 days
Stock Options
Number of Options
Number of Options, Beginning balance (in shares)	2,286,011	2,696,805
Number of Options, Granted (in shares)	25,477	25,477
Number of Options, Exercise of stock options (in shares)	(73,721)	(484,515)
Number of Options, Expired/forfeited (in shares)	(34,143)	(34,143)
Number of Options, Ending balance (in shares)	2,203,624	2,203,624
Weighted-Average Exercise Price
Weighted-Average Exercise Price, Beginning balance (in dollars per share) | $ / shares	$ 120.92	$ 116.46
Weighted-Average Exercise Price, Granted (in dollars per share) | $ / shares	176.32	176.32
Weighted-Average Exercise Price, Exercise of stock options (in dollars per share) | $ / shares	110.93	94.56
Weighted-Average Exercise Price, Expired/forfeited (in dollars per share) | $ / shares	144.74	144.74
Weighted-Average Exercise Price, Ending balance (in dollars per share) | $ / shares	$ 121.53	$ 121.53
Time-based Restricted Stock Units
Restricted Stock Units
Number of Shares, Beginning balance of RSUs (in shares)	721,325	731,327
Number of Shares, Granted RSUs (in shares)	260,507	264,578
Number of Shares, Vesting of restricted stock units (in shares)	(23,793)	(29,499)
Number of Shares, Expired/forfeited RSUs (in shares)	(13,754)	(22,121)
Number of Shares, Ending balance of RSUs (in shares)	944,285	944,285
Weighted-Average Grant Date Fair Value
Weighted-Average Grant Date Fair Value, Beginning balance (in dollars per share) | $ / shares	$ 137.60	$ 137.76
Weighted-Average Grant Date Fair Value, Granted (in dollars per share) | $ / shares	170.50	170.53
Weighted-Average Grant Date Fair Value, Vesting of Restricted Stock Units (in dollars per share) | $ / shares	80.31	97.62
Weighted-Average Grant Date Fair Value, Expired/forfeited (in dollars per share) | $ / shares	150.45	148.80
Weighted-Average Grant Date Fair Value, Ending balance (in dollars per share) | $ / shares	$ 147.94	$ 147.94
Restricted stock units expected to vest (in shares)	900,000	900,000
Restricted stock units, aggregate intrinsic value | $	$ 183.2	$ 183.2
Performance-based Restricted Stock Units
Restricted Stock Units
Number of Shares, Beginning balance of RSUs (in shares)	185,894	201,705
Number of Shares, Granted RSUs (in shares)	92,905	92,905
Number of Shares, Vesting of restricted stock units (in shares)	(1,969)	(15,002)
Number of Shares, Expired/forfeited RSUs (in shares)	(14,297)	(17,075)
Number of Shares, Ending balance of RSUs (in shares)	262,533	262,533
Weighted-Average Grant Date Fair Value
Weighted-Average Grant Date Fair Value, Beginning balance (in dollars per share) | $ / shares	$ 153.62	$ 153.42
Weighted-Average Grant Date Fair Value, Granted (in dollars per share) | $ / shares	168.95	168.95
Weighted-Average Grant Date Fair Value, Vesting of Restricted Stock Units (in dollars per share) | $ / shares	142.55	150.02
Weighted-Average Grant Date Fair Value, Expired/forfeited (in dollars per share) | $ / shares	153.59	153.12
Weighted-Average Grant Date Fair Value, Ending balance (in dollars per share) | $ / shares	$ 159.13	$ 159.13
Restricted stock units expected to vest (in shares)	200,000	200,000
Restricted stock units, aggregate intrinsic value | $	$ 48.1	$ 48.1