STOCKHOLDERS’ DEFICIT - Narrative (Detail) $ / shares in Units, $ in Millions	1 Months Ended	12 Months Ended
	May 31, 2022 shares	Dec. 31, 2023 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock reserved for future issuance under stock options (in shares)		18,256,842
Employee stock purchase plan, offering period					6 months
Preferred stock, shares authorized (in shares)		5,000,000	5,000,000
Preferred stock, par value (in dollars per share) | $ / shares		$ 0.01	$ 0.01
Preferred stock, shares outstanding (in shares)		0	0
Preferred stock, shares issued (in shares)		0	0
Stock Incentive Plan 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock incentive plan, additional shares authorized (in shares)	6,000,000
Performance Based Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		1 year
Aggregate intrinsic value of stock option exercised | $		$ 9.7	$ 74.4	$ 40.2
Stock options vested (in shares)		0	0	197,102
Time-based stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value of stock options granted (in dollars per share) | $ / shares		$ 96.53	$ 80.65	$ 82.59
Aggregate intrinsic value of stock option exercised | $		$ 107.0	$ 289.3	$ 247.8
Option vesting percentage on the first anniversary of grant date		25.00%
Option vesting percentage at the end of each successive three-month period		6.25%
Not Full Value Award
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares counted against share pool (in shares)		1
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock reserved for future issuance under stock options (in shares)		7,422,183
Equity awards, term		10 years
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Shares of common stock reserved for future issuance under stock options (in shares)		2,057,874
RSU's vesting percentage at the end of each successive anniversaries		0.33
Additional Equity Awards Available for Future Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock reserved for future issuance under stock options (in shares)		8,168,918
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock reserved for future issuance under stock options (in shares)		607,867
Stock incentive plan, shares authorized (in shares)					1,965,789
Employee stock purchase plan, purchase price as a percentage of common stock closing price					85.00%
Employee stock purchase plan, shares issued (in shares)		108,905	119,285
Full Value Award
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares counted against share pool (in shares)		1.5