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Equity Incentive Plans - Summary of Stock Option and RSU Activity (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Restricted Stock Units (RSUs) |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] |  |  |
Granted (in dollars per share) | $ 223.98 | $ 228.33 | $ 239.85
2019 Equity Incentive Plan |  |  |
Number of Options (in thousands) |  |  |
Beginning of period (in shares) | 344,021 |  |
Granted (in shares) | 14,979 |  |
Exercised or released (in shares) | (10,469) |  |
Cancelled (in shares) | (3,996) |  |
End of period (in shares) | 344,535 | 344,021 |
Weighted- Average Exercise Price |  |  |
Beginning of period (in dollars per share) | $ 40.41 | $ 35.11 |
Granted (in dollars per share) | 235.22 |  |
Exercised or released (in dollars per share) | 82.04 |  |
Cancelled (in dollars per share) | 205.61 |  |
End of period (in dollars per share) | $ 40.41 | $ 35.11 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Additional Disclosures [Abstract] |  |  |
Weighted-average remaining contractual life (years), End of period | 3 years 6 months 3 days |  |
Aggregate intrinsic value, End of period | $ 125,220 |  |
Number of options (in shares), vested and expected to vest | 344,215 |  |
Weighted-average exercise price (in dollars per share), vested and expected to vest | $ 40.23 |  |
Weighted-average remaining contractual life (years), Vested and expected to vest | 3 years 6 months |  |
Aggregate intrinsic value, Vested and expected to vest | $ 125,160 |  |
Number of options (in shares), exercisable and vested | 323,847 |  |
Weighted-average exercise price (in dollars per share), exercisable and vested | $ 27.75 |  |
Weighted-average remaining contractual life (years), Exercisable and vested | 3 years 1 month 20 days |  |
Aggregate intrinsic value, Exercisable and vested | $ 121,790 |  |
2019 Equity Incentive Plan | Restricted Stock Units (RSUs) |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |
Beginning of period (in shares) | 18,661 | 19,088 |
Granted (in shares) | 12,045 |  |
Exercised or released (in shares) | (7,515) |  |
Cancelled (in shares) | (4,957) |  |
End of period (in shares) | 18,661 | 19,088 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] |  |  |
Beginning of period (in dollars per share) | $ 233.02 | $ 225.01 |
Granted (in dollars per share) | 223.98 |  |
Exercised or released (in dollars per share) | 206.02 |  |
Cancelled (in dollars per share) | 221.15 |  |
End of period (in dollars per share) | $ 233.02 | $ 225.01 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract] |  |  |
Number of RSUs (in shares), vested and expected to vest | 18,409 |  |
Weighted-average grant date fair value (in dollars per share), vested and expected to vest | $ 232.99 |  |

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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(03) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(03) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued 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). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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