Acquisitions	3 Months Ended
Acquisitions	Jan. 01, 2023
Business Combination and Asset Acquisition [Abstract]
Acquisitions	Acquisitions Subsequent Event. On January 3, 2023, we acquired Amyx, Inc. (“Amyx”), an enterprise technology services, cybersecurity and management consulting firm. Based in Reston, Virginia, Amyx, with over 500 employees, provides application modernization, cybersecurity, systems engineering, financial management, and program management support on over 30 Federal Government programs. Amyx will be included in our GSG segment. Subsequent Event. On September 23, 2022, we made an all cash offer to acquire all of the outstanding shares of RPS Group plc ("RPS"), a publicly traded company on the London Stock Exchange for 222 pence per share, through a scheme of arrangement, which was unanimously recommended by RPS's Board of Directors. On November 3, 2022, RPS's shareholders approved the scheme of arrangement. On January 19, 2023, the court sanctioned scheme of arrangement to purchase RPS was approved, and we completed the acquisition on January 23, 2023. The total purchase price including assumed debt and transactions costs was approximately GBP 714 million. RPS employs approximately 5,000 associates in the United Kingdom, Europe, Asia Pacific and North America, delivering high-end solutions, especially in energy transformation, water and program management for government and commercial clients. Substantially all of RPS will be included in our CIG segment. The results of these acquisitions will be included in our consolidated financial statements beginning on the respective closing dates. We are in the process of performing procedures to determine the fair value of assets acquired and liabilities assumed related to the acquisitions, and will include the preliminary purchase price allocation in our Quarterly Report on Form 10-Q for the period ending April 2, 2023. See Note 14, "Credit Facility" for additional information regarding the financing of these acquisitions. In fiscal 2022, we acquired The Integration Group of America ("TIGA"), Piteau Associates (“PAE”) and other financially immaterial acquisitions. TIGA is based in Spring, Texas and is an industry leader in process automation and system integration solutions, including customized software and platform (SaaS/PaaS) applications, advanced data analytics, cloud data integration and platform virtualization. PAE is based in Vancouver, British Columbia and is a global leader in sustainable natural resource analytics including hydrologic numerical modeling and dewatering system design. PAE is part of our CIG segment, and TIGA and other immaterial acquisitions are part of our GSG segment. The total fair value of the purchase price for all four acquisitions was $88.3 million. This amount is comprised of $44.0 million in initial cash payments made to the sellers, $2.5 million of receivables (net) related to estimated post-closing adjustments for the net assets acquired, $15.5 million payable in a promissory note issued to the sellers along with related transaction expenses of the sellers (which were subsequently paid in July 2022), and $31.3 million for the estimated fair value of contingent earn-out obligations, with a maximum of $47.0 million, based upon the achievement of specified operating income targets in each of the three to five years following the acquisitions. Goodwill additions resulting from fiscal 2022 business combinations are primarily attributable to the significant technical expertise residing in embedded workforces that are sought out by clients, long-term management experience, the industry reputations, and the synergies expected to arise after the acquisitions in the areas of data management, digitization, modeling, water, and natural resources. These acquired capabilities, when combined with our existing global consulting and engineering business, result in opportunities that allow us to provide services under contracts that could not have been pursued individually by either us or the acquired companies. The results of these acquisitions were included in our consolidated financial statements from their respective closing dates. These acquisitions were not considered material to our financial statements, individually or in the aggregate, to our consolidated financial statements. As a result, no pro forma information has been provided. Backlog and client relations intangible assets include the fair value of existing contracts and the underlying customer relationships with lives ranging from one to ten years, and trade names intangible assets have lives ranging from three to five years. For detailed information regarding our intangible assets, see Note 5, “Goodwill and Intangible Assets”. Most of our acquisition agreements include contingent earn-out agreements, which are generally based on the achievement of future operating income thresholds. The contingent earn-out arrangements are based on our valuations of the acquired companies and reduce the risk of overpaying for acquisitions if the projected financial results are not achieved. The fair values of any earn-out arrangements are included as part of the purchase price of the acquired companies on their respective acquisition dates. For each transaction, we estimate the fair value of contingent earn-out payments as part of the initial purchase price and record the estimated fair value of contingent consideration as a liability in “Current contingent earn-out liabilities” and “Non-current contingent earn-out liabilities” on the consolidated balance sheets. We consider several factors when determining that contingent earn-out liabilities are part of the purchase price, including the following: (1) the valuation of our acquisitions is not supported solely by the initial consideration paid, and the contingent earn-out formula is a critical and material component of the valuation approach to determining the purchase price; and (2) the former owners of acquired companies that remain as key employees receive compensation other than contingent earn-out payments at a reasonable level compared with the compensation of our other key employees. The contingent earn-out payments are not affected by employment termination. We measure our contingent earn-out liabilities at fair value on a recurring basis using significant unobservable inputs classified within Level 3 of the fair value hierarchy. We use a probability-weighted discounted income approach as a valuation technique to convert future estimated cash flows to a single present value amount. The significant unobservable inputs used in the fair value measurements are operating income projections over the earn-out period (generally three to five years), and the probability outcome percentages we assign to each scenario. Significant increases or decreases to either of these inputs in isolation would result in a significantly higher or lower liability, with a higher liability capped by the contractual maximum of the contingent earn-out obligation. Ultimately, the liability will be equivalent to the amount paid, and the difference between the fair value estimate and amount paid will be recorded in earnings. The amount paid that is less than or equal to the contingent earn-out liability on the acquisition date is reflected as cash used in financing activities in our consolidated statements of cash flows. Any amount paid in excess of the contingent earn-out liability on the acquisition date is reflected as cash used in operating activities in our consolidated statements of cash flows. We review and re-assess the estimated fair value of contingent consideration on a quarterly basis, and the updated fair value could differ materially from the initial estimates. Changes in the estimated fair value of our contingent earn-out liabilities related to the time component of the present value calculation are reported in interest expense. Adjustments to the estimated fair value related to changes in all other unobservable inputs are reported in operating income. For the first quarter of fiscal 2023, we evaluated our estimates for contingent consideration liabilities for the remaining earn-out periods for each individual acquisition, which included a review of their financial results to-date, the status of ongoing projects in their RUPO, and the inventory of prospective new contract awards. In addition, we considered the potential impact of the global economic disruption due to the COVID-19 pandemic on our operating income projections over the various earn-out periods. For the first quarters of fiscal 2023 and 2022, we had no material adjustments to our contingent earn-out liabilities in operating income. At January 1, 2023, there was a total potential maximum of $120.9 million of outstanding contingent consideration related to acquisitions. Of this amount, $69.0 million was estimated as the fair value and accrued on our consolidated balance sheet.