Stock-Based Compensation - Additional Disclosures (Details) - USD ($)		3 Months Ended		9 Months Ended
	Aug. 02, 2019	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Stock-based compensation, additional disclosures
Issuance of shares of common stock				$ 5,364,000	$ 5,881,000
Common stock reserved for future issuance or settlement (in shares)		7,200,000		7,200,000
Employee stock purchase plan, stock-based compensation		$ 7,299,000	$ 6,254,000	$ 24,133,000	$ 21,454,000
Restricted Stock Units
Stock-based compensation, additional disclosures
Weighted average grant-date fair value of RSUs granted		$ 138.27	$ 82.18	$ 133.39	$ 114.66
Total fair value of shares vested from RSU grants		$ 5,700,000	$ 6,900,000	$ 23,600,000	$ 31,900,000
Total unrecognized compensation cost		36,000,000.0		$ 36,000,000.0
Total unrecognized compensation cost, period of recognition				2 years 7 months 6 days
Excess tax benefits from stock-based compensation		$ 2,400,000	$ 2,400,000	$ 8,200,000	$ 12,000,000.0
Performance awards, shares granted				266,237
Performance awards, shares forfeited				83,951
Stock Options
Stock-based compensation, additional disclosures
Weighted average fair value (in dollars per share)		$ 37.54	$ 20.05	$ 33.15	$ 31.26
Total unrecognized compensation cost		$ 11,700,000		$ 11,700,000
Total unrecognized compensation cost, period of recognition				2 years 7 months 6 days
Total intrinsic value of options exercised		2,900,000	$ 2,400,000	$ 5,900,000	$ 9,200,000
Issuance of shares of common stock		$ 2,700,000	$ 1,400,000	$ 5,400,000	5,900,000
Performance Shares [Member]
Stock-based compensation, additional disclosures
Performance awards, performance target				10.00%
Performance awards, shares granted				418,886
Employee stock purchase plan, stock-based compensation				$ 0	$ 0
Performance awards, shares forfeited	60,680
2018 Employee Stock Purchase Plan
Stock-based compensation, additional disclosures
Common stock reserved for future issuance or settlement (in shares)		229,807		229,807
Employee stock purchase plan, purchase price of common stock, percent		85.00%
Employee stock purchase plan, stock-based compensation		$ 200,000		$ 400,000
Employee stock purchase plan, number of shares authorized		250,000		250,000