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Shareholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Feb. 03, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Aggregate ordinary shares repurchase | $ 11,785.1 |  |  |
Shares repurchase, shares | 10,900,000 | 11,400,000 | 11,200,000 |
Shares repurchase, value | $ 1,299.5 | $ 1,297.7 | $ 1,278.0 |
Weighted average fair value granted under options | $ 25.9 | $ 22.0 | $ 22.8 |
Total intrinsic value of options exercised | $ 65.1 | $ 81.7 | $ 25.4 |
Weighted average fair value of stock units granted | $ 120.1 | $ 105.3 | $ 113.3 |
Total fair value of restricted stock units vested | $ 66.8 | $ 49.6 | $ 47.0 |
Unrecognized compensation expense | $ 281.6 |  |  |
Unrecognized compensation expense expected period of recognition (in years) | 2 years |  |  |
Options to purchase ordinary shares reserved for issuance | 13.9 |  |  |
Share based compensation aggregate amount including options and units aggregate value outstanding | $ 139.6 |  |  |
Share based compensation arrangement by share based payment award options outstanding intrinsic value | $ 37.1 |  | $ 244.3 |
Share based compensation arrangement by share based payment award equity instruments other than options non vested number | 2,300,000 | 1,700,000 |  |
Options In The Money |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share based compensation arrangement by share based payment award options nonvested number of shares | 6,500,000 | 9,400,000 |  |
Options Out Of Money |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share based compensation arrangement by share based payment award options nonvested number of shares | 1,700,000 | 5,800,000 |  |
Share based compensation arrangement by share based payment award options outstanding intrinsic value | $ 0.0 |  |  |
Share Repurchase Program |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Authorized amount under share repurchase programs per quarter |  |  |  | $ 2,000.0
Authorized amount under share repurchase programs |  |  |  | $ 325.0
Two Thousand Five Equity Incentive Plans |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Reserved and Authorized Shares, percent of ordinary shares issued and outstanding at year end | 10.00% |  |  |
Employee Stock |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Ordinary shares issued | 1,900,000 |  |  |
Percentage of salary to purchase Ordinary shares |  |  | 15.00% |
Ordinary shares per employee, maximum |  |  | 1,250 |
Price of Ordinary shares purchased under ESPP, percentage of lower of fair market value of Ordinary share on subscription date of each offering period or on purchase date |  |  | 85.00% |
Purchase of Ordinary shares by employees | 400,000 | 400,000 | 300,000 |
Average price per share purchased by employees | $ 105.3 | $ 95.4 | $ 95.2 |
Compensation expense recognized | $ 10.9 | $ 10.2 | $ 8.0 |
US ESPP |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Options to purchase ordinary shares reserved for issuance | 500,000 |  |  |
Number of shares available under ESPP | 800,000 |  |  |
Rest of the World ESPP |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Options to purchase ordinary shares reserved for issuance | 2,000,000.0 |  |  |
Performance Stock Units PSU |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting period | 4 years |  |  |
Share based compensation arrangement by share based payment award equity instruments other than options non vested number | 100,000 | 0 |  |
Performance Stock Units PSU | Minimum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share based compensation arrangement by share based payment award equity instruments other than options non vested number | 100,000 |  |  |

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