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Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Jan. 01, 2022
Goodwill [Roll Forward] |  |
Goodwill, gross beginning balance | $ 376.1 | $ 365.5
Accumulated impairment losses | (78.8) | (73.0)
Goodwill, net beginning balance | 297.3 | 292.4
Goodwill acquired (disposed) / measurement period adjustments | (5.0) | 10.7
Accumulated impairment losses disposed |  | (5.8)
Accumulated impairment losses disposed | 13.6 |
Goodwill, gross ending balance | 371.1 | 376.1
Accumulated impairment losses | (65.2) | (78.8)
Goodwill, net ending balance | 305.9 | 297.3
Workplace Furnishings |  |
Goodwill [Roll Forward] |  |
Goodwill, gross beginning balance | 162.3 | 168.5
Accumulated impairment losses | (78.6) | (72.9)
Goodwill, net beginning balance | 83.6 | 95.6
Goodwill acquired (disposed) / measurement period adjustments | (13.6) | (6.2)
Accumulated impairment losses disposed |  | (5.8)
Accumulated impairment losses disposed | 13.6 |
Goodwill, gross ending balance | 148.7 | 162.3
Accumulated impairment losses | (65.0) | (78.6)
Goodwill, net ending balance | 83.6 | 83.6
Residential Building Products |  |
Goodwill [Roll Forward] |  |
Goodwill, gross beginning balance | 213.8 | 197.0
Accumulated impairment losses | (0.1) | (0.1)
Goodwill, net beginning balance | 213.7 | 196.8
Goodwill acquired (disposed) / measurement period adjustments | 8.6 | 16.9
Accumulated impairment losses disposed |  | 0.0
Accumulated impairment losses disposed | 0.0 |
Goodwill, gross ending balance | 222.4 | 213.8
Accumulated impairment losses | (0.1) | (0.1)
Goodwill, net ending balance | $ 222.3 | $ 213.7

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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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