Stock Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2016	Jun. 30, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Term of award		10 years
Share based compensation granted under plan vest period		4 years
Granted		331,920
Weighted-average grant date fair value per share of stock-based awards, granted to employees		$ 67.31	$ 70.94	$ 48.82
Share-Based Compensation Arrangement by Share-Based Payment Award, Terms of Award			550,110 options relating to the Unvested Tranche became vested as they met the conditions for vesting and, accordingly, all previously unrecognized expense associated with these options was immediately recognized
Average closing price		$ 77.66
Weighted average period expected to recognize unrecognized stock based compensation expense		2 years
Unrecognized stock based compensation expense		$ 238.5
Options with Service conditions [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized stock based compensation expense		72.9
Stock Units with Service Conditions [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized stock based compensation expense		157.7
Restricted Stock Units With Certain Peformance Conditions [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized stock based compensation expense		$ 7.9
Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares, Vested		734,922
Weighted Average Grant Date Fair Value			$ 151.2	$ 85.39
Fair Value of RSUs		$ 86.9	$ 82.6	$ 33.1
CEO [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options granted	3,300,000
Incremental compensation cost		$ 123.3
2013 Employee Stock Purchase Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares approved under the plan							300,000			500,000		300,000	300,000
Common stock remain available for future grant		200,000
Term of award		24 months
Percentage of closing price of common stock		85.00%
2013 Employee Stock Purchase Plan [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation award, expiration date		Aug. 31, 2026
2013 Employee Stock Purchase Plan [Member] | Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation award, expiration date		Aug. 31, 2025
2018 Equity Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares approved under the plan							2,500,000	2,500,000	3,800,000		2,900,000
Common stock remain available for future grant		3,400,000
2024 Equity Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares approved under the plan					500,000	600,000
Common stock remain available for future grant		1,000,000
March Two Thousand Twenty Two Performance Stock Units Plan [Member] | Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares, Vested		33,000
Granted		33,000
March Two Thousand Twenty Three Performance Stock Units Plan [Member] | Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares, Vested		24,500
Granted		485,275
March Two Thousand Twenty Four Performance Stock Units Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options granted		97,460
March Two Thousand Twenty Four Performance Stock Units Plan [Member] | Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares, Vested		44,300
Share based compensation award tranche one [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting, Stock options			550,110	550,110
Share based compensation award tranche one [Member] | CEO [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense			$ 13.4	$ 109.9