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Goodwill and Intangible Assets - Narrative (Details) - USD ($) |  | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 28, 2021 | Jul. 03, 2022 | Jun. 27, 2021 | Jul. 03, 2022 | Jun. 27, 2021 | Oct. 04, 2021 | Oct. 03, 2021
Goodwill [Line Items] |  |  |  |  |  |  |
Impairment of goodwill | $ 0 |  |  |  |  |  |
Percentage of excess of fair value over carrying value (less than) | 150.00% |  |  |  |  | 150.00% |
Amortization expense |  | $ 3,700,000 | $ 2,200,000 | $ 9,600,000 | $ 7,800,000 |  |
GSG |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |
Gross amounts of goodwill |  | 547,000,000 |  | 547,000,000 |  |  | $ 556,100,000
Accumulated impairment |  | 17,700,000 |  | 17,700,000 |  |  | 17,700,000
CIG |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |
Gross amounts of goodwill |  | 743,700,000 |  | 743,700,000 |  |  | 691,600,000
Accumulated impairment |  | $ 121,500,000 |  | $ 121,500,000 |  |  | $ 121,500,000

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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- Definition Amount before 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/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://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 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 + Details
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