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PA Consulting Business Combination - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions |  | 3 Months Ended
--- | --- | ---
Mar. 02, 2021 | Jul. 02, 2021
Business Acquisition [Line Items] |  |
Pre-tax transaction costs |  | $ 36.4
Preference share effect on basic earnings per share (in dollars per share) |  | $ 0.44
PA Consulting Employees |  |
Business Acquisition [Line Items] |  |
Ownership interest of employees | 35.00% |
Preferred stock cumulative dividend rate | 12.00% |
Redeemable noncontrolling interest exercise period | 5 years |
PA Consulting Group Limited |  |
Business Acquisition [Line Items] |  |
Percentage of outstanding shares of common and preferred stock acquired | 65.00% |
Consideration transferred | $ 1,700.0 |
Consideration received from acquiree | 267.0 |
Fair value of redeemable noncontrolling interests at acquisition on March 2, 2021 | $ 582.4 |
Cash in employee benefit trust |  | $ 12.6
PA Consulting Group Limited | Customer Relationships, Contracts And Backlog And Trade names |  |
Business Acquisition [Line Items] |  |
Useful life of acquired intangible assets | 12 years |
PA Consulting Group Limited | Customer Relationships, Contracts And Backlog And Trade names | Minimum |  |
Business Acquisition [Line Items] |  |
Useful life of acquired intangible assets | 9 years |
PA Consulting Group Limited | Customer Relationships, Contracts And Backlog And Trade names | Maximum |  |
Business Acquisition [Line Items] |  |
Useful life of acquired intangible assets | 20 years |

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