Stock Incentive Plans - Additional Information (Detail) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
Jun. 30, 2024	Dec. 31, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Modifications to the performance-based RSUs		(i) the extension of the performance period by one year, (ii) a change to the performance criteria, (iii) a change to the number of units to be issued depending on performance and (iv) for certain grants, imposing a maximum number of units to be issued depending on performance equal to 100% of the target.The modification to the performance-based RSUs subject to a market condition resulted in incremental stock-based compensation expense of $67.0 million, which is being recognized ratably over the modified performance periods.
Percentage of number of units to be issued depending on performance		100.00%
Share based compensation by share based arrangement options vested during the period aggregate fair value	$ 1.9
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number	26,936,712
Share based compensation by share based arrangement unrecognised compensation for options unvested	$ 70.2
Share based compensation by share based arrangement unrecognised compensation for options unvested remaining period for recognition	1 year 3 months 18 days
Ccc2021 Employee Stock Purchase Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of shares sold under plan	194,307
Cayman Equity Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross	761,743
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number	2,385,142	1,735,900
Employee Tax Obligations [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vested	4,537,417
Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Granted	10,047,960
Vested	12,334,980
Incremental stock-based compensation expense		$ 67.0
Restricted Stock Units (RSUs) [Member] \| Time Based Vesting Requirements [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Granted	7,791,614
Restricted Stock Units (RSUs) [Member] \| Performance Based Vesting Requirements [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Granted	2,256,346
Common Class B [Member] \| Performance And Market Based Vesting Conditions [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share based compensation by share based arrangement unrecognised compensation for options unvested remaining period for recognition	2 years 8 months 12 days
Common Class B [Member] \| Time Based Vesting [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share based compensation by share based arrangement unrecognised compensation for options unvested	$ 209.5

Percentage of number of units to be issued depending on performance.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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Gross number of share options (or share units) granted during the period.

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Description of modification of award under share-based payment arrangement. Includes, but is not limited to, terms for expiration date, vesting rights and exercise price.

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An excess of the fair value of the modified award over the fair value of the award immediately before the modification.

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Number of shares issued under share-based payment arrangement.

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