| Submission | Oct. 25, 2024 |
| Submission [Line Items] | |
| Central Index Key | 0001060955 |
| Registrant Name | ICON PLC |
| Form Type | S-8 |
| Submission Type | S-8 |
| Fee Exhibit Type | EX-FILING FEES |
| Offerings - Offering: 1 | Oct. 25, 2024 USD ($) shares |
| Offering: | |
| Fee Previously Paid | false |
| Other Rule | true |
| Security Type | Equity |
| Security Class Title | Ordinary Shares, EUR 0.06 par value per share |
| Amount Registered | shares | 2,500,000 |
| Proposed Maximum Offering Price per Unit | 231.615 |
| Maximum Aggregate Offering Price | $ 579,037,500 |
| Fee Rate | 0.01531% |
| Amount of Registration Fee | $ 88,650.64 |
| Offering Note | (1) Pursuant to Rule 416(a) under the Securities Act of 1933, as amended (the Securities Act), this Registration Statement shall also cover an indeterminate number of Ordinary Shares that may, with respect to the Ordinary Shares registered hereunder, become issuable under the ICON plc 2013 Employees Restricted Share Unit Plan (as amended and restated effective as of November 6, 2024) (the RSU Plan) by reason of any stock dividend, stock split, recapitalization, or other similar transaction effected without ICON plcs receipt of consideration that results in an increase in the number of outstanding Ordinary Shares in accordance with the provisions of the RSU Plan. (2) Estimated solely for the purpose of calculating the registration fee, computed in accordance with Rule 457(c) and 457(h)(1) under the Securities Act, on the basis of the average of the high and low sales prices of the Ordinary Shares, as reported on The NASDAQ Global Select Market for October 24, 2024. |
| Fees Summary | Oct. 25, 2024 USD ($) |
| Fees Summary [Line Items] | |
| Total Offering | $ 579,037,500 |
| Total Fee Amount | 88,650.64 |
| Total Offset Amount | 0 |
| Net Fee | $ 88,650.64 |
