PA Consulting Business Combination - Summary of Estimated Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Oct. 01, 2021	Mar. 02, 2021
Assets
Goodwill	$ 7,350,494	$ 7,197,000
PA Consulting Group Limited
Assets
Cash and cash equivalents			$ 134,900
Receivables			164,900
Property, equipment and improvements, net			40,500
Goodwill			1,450,500
Identifiable intangible assets			1,004,200
Prepaid expenses and other current assets			9,500
Miscellaneous long term assets			83,700
Total Assets			2,888,200
Liabilities
Accounts payable			6,500
Accrued liabilities and other current liabilities			349,200
Other long term liabilities			248,200
Total Liabilities			603,900
Redeemable Noncontrolling interests			582,400
Net assets acquired			$ 1,701,900