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Business combinations - Schedule of Fair Value of PRA Health Sciences Inc Acquisition Consideration (Details) - PRA Health Sciences, Inc $ in Thousands | Jul. 01, 2021 USD ($)
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Business Acquisition [Line Items] |
Fair value of cash consideration | $ 5,308,646
Fair value of ordinary shares issued to acquiree stockholders | 5,658,126
Fair value of replacement share-based awards issued to acquiree employees | 209,399
Repayment of term loan obligations and accrued interest | 865,800
Total consideration transferred | 12,041,971
Payments to settle debt obligations that existed prior to acquisition date | $ 401,600

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