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v3.21.2

Basis of Presentation (Details) £ in Millions, shares in Millions |  |  |  |  | 3 Months Ended | 8 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 02, 2021 USD ($) | Nov. 24, 2020 USD ($) | Mar. 06, 2020 USD ($) | Mar. 06, 2020 GBP (£) | Apr. 26, 2019 USD ($) shares | Jul. 02, 2021 USD ($) | Jun. 26, 2020 USD ($) | Dec. 31, 2019 shares | Oct. 02, 2020 USD ($)
Worley Stock |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Ordinary shares included in purchase price (in shares) | shares |  |  |  |  | 58.2 |  |  | 51.4 |
Worley |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  | $ 3,400,000,000 |  |  |  |
Consideration paid in cash |  |  |  |  | $ 2,800,000,000 |  |  |  |
Discontinued Operations | Worley |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Assets held for sale |  |  |  |  |  |  |  |  | $ 0
PA Consulting Employees |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Ownership interest of employees | 35.00% |  |  |  |  |  |  |  |
PA Consulting Group Limited |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Percentage of outstanding shares of common and preferred stock acquired | 65.00% |  |  |  |  |  |  |  |
Consideration transferred | $ 1,700,000,000 |  |  |  |  |  |  |  |
Consideration received from acquiree | 267,000,000 |  |  |  |  |  |  |  |
Compensation expense forfeited |  |  |  |  |  | $ 5,600,000 |  |  |
Compensation expense |  |  |  |  |  | 261,000,000 |  |  |
Fair value of redeemable noncontrolling interests at acquisition on March 2, 2021 | 582,400,000 |  |  |  |  |  |  |  |
Cash and cash equivalents | $ 134,900,000 |  |  |  |  |  |  |  |
Buffalo Group |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Consideration transferred |  | $ 190,100,000 |  |  |  |  |  |  |
Consideration paid in cash |  | 182,400,000 |  |  |  |  |  |  |
Contingent consideration |  | 7,700,000 |  |  |  | $ 3,900,000 |  |  |
Change in amount of contingent consideration |  |  |  |  |  |  | $ 3,800,000 |  |
Debt assumed |  | 7,700,000 |  |  |  |  |  |  |
Cash and cash equivalents |  | $ 8,400,000 |  |  |  |  |  |  |
John Wood Group |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Enterprise value on debt-free, cash-free basis |  |  | $ 317,900,000 | £ 246 |  |  |  |  |
Cash and cash equivalents |  |  | $ 24,300,000 |  |  |  |  |  |

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