XML 55 R33.htm IDEA: XBRL DOCUMENT
v3.22.4

Accumulated Other Comprehensive Income | 12 Months Ended
--- | ---
Dec. 31, 2022
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Accumulated Other Comprehensive Income | Accumulated Other Comprehensive Income
| Year ended
| December 31, 2022 | December 31, 2021
| (in thousands)
Currency translation adjustments | $ | (175,369) |  | $ | (85,840) |
Actuarial gain/(loss) on defined benefit pension plan (note 21) | 7,559 |  | (5,098) |
Loss on cash flow hedge | (3,728) |  | — |
Amortization of loss on cash flow hedge | — |  | 1 |
Total | $ | (171,538) |  | $ | (90,937) |

X
- Definition Disclosure of the components of accumulated other comprehensive income (loss). + References No definition available. + Details
Name: | iclr_AccumulatedOtherComprehensiveIncomeLossTextBlock
Namespace Prefix: | iclr_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration