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Goodwill and Intangibles - Schedule of Carrying Value of Goodwill by Reportable Segment Appearing in Accompanying Consolidated Balance Sheets (Details) $ in Thousands | 3 Months Ended
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Dec. 30, 2022 USD ($)
Goodwill [Roll Forward] |
Balance at the beginning of the period | $ 7,184,658
Acquired | 16,425
Post-Acquisition Adjustments | 1,271
Foreign currency translation and other | 138,728
Balance at the end of the period | 7,341,082
Critical Mission Solutions |
Goodwill [Roll Forward] |
Balance at the beginning of the period | 2,251,724
Acquired | 0
Post-Acquisition Adjustments | 0
Foreign currency translation and other | 10,460
Balance at the end of the period | 2,262,184
People & Places Solutions |
Goodwill [Roll Forward] |
Balance at the beginning of the period | 3,196,796
Acquired | 0
Post-Acquisition Adjustments | (138)
Foreign currency translation and other | 13,168
Balance at the end of the period | 3,209,826
Divergent Solutions |
Goodwill [Roll Forward] |
Balance at the beginning of the period | 576,986
Acquired | 0
Post-Acquisition Adjustments | 0
Foreign currency translation and other | 2,680
Balance at the end of the period | 579,666
PA Consulting |
Goodwill [Roll Forward] |
Balance at the beginning of the period | 1,159,152
Acquired | 16,425
Post-Acquisition Adjustments | 1,409
Foreign currency translation and other | 112,420
Balance at the end of the period | $ 1,289,406

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 55 -Paragraph 24 -URI https://asc.fasb.org/extlink&oid=122137925&loc=d3e14258-109268 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(15)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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