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Business Combinations - Fair Value of Consideration Transferred, PRA Acquisition (Details) - USD ($) $ in Thousands		12 Months Ended
	Jul. 01, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Fair value of cash consideration		$ 0	$ 5,914,475	$ 47,931
PRA Health Sciences, Inc
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
Consideration transferred	12,041,971
Payments to settle debt obligations that existed prior to acquisition date	$ 401,600

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Business Combination, Consideration Transferred, Payments To Settle Debt Obligations That Existed Prior To Acquisition Date

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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.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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