XML 105 R83.htm IDEA: XBRL DOCUMENT
v3.22.4

Intangible Assets - Narrative (Details) - USD ($) $ in Thousands |  | 12 Months Ended | 18 Months Ended
--- | --- | --- | ---
Jul. 01, 2021 | Dec. 31, 2022 | Dec. 31, 2022
Customer relationships |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |
Amortization period |  | 23 years |
Order backlog |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |
Amortization period |  | 3 years |
Trade names & brands |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |
Amortization period |  | 3 years |
Patient database |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |
Amortization period |  | 7 years |
Technology assets |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |
Amortization period |  | 5 years |
PRA Health Sciences, Inc |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |
Value of intangible assets acquired | $ 4,919,000 |  |
Amortization of intangible assets |  | $ 453,600 | $ 677,100
PRA Health Sciences, Inc | Minimum |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |
Amortization period | 3 years |  |
PRA Health Sciences, Inc | Maximum |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |
Amortization period | 23 years |  |
PRA Health Sciences, Inc | Customer relationships |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |
Value of intangible assets acquired | $ 3,938,000 |  |
PRA Health Sciences, Inc | Order backlog |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |
Value of intangible assets acquired | 500,000 |  |
PRA Health Sciences, Inc | Trade names & brands |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |
Value of intangible assets acquired | 202,000 |  |
PRA Health Sciences, Inc | Patient database |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |
Value of intangible assets acquired | 168,000 |  |
PRA Health Sciences, Inc | Technology assets |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |
Value of intangible assets acquired | $ 111,000 |  |

X
- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
Name: | us-gaap_AmortizationOfIntangibleAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of identifiable intangible assets recognized as of the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI https://asc.fasb.org/extlink&oid=123455525&loc=d3e2207-128464 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=128092470&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_OrderOrProductionBacklogMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TradeNamesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_DatabasesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TechnologyBasedIntangibleAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=iclr_PRAHealthSciencesIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |