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Sale of Assets - Narrative (Details) $ in Millions |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Mar. 20, 2020 USD ($) headquarters | Sep. 27, 2020 USD ($) | Jun. 28, 2020 USD ($) | Sep. 29, 2019 USD ($) | Jun. 30, 2019 USD ($) | Sep. 27, 2020 USD ($) | Sep. 29, 2019 USD ($)
Sale of Assets [Line Items] |  |  |  |  |  |  |
Proceeds from wage subsidy receivables, net of fees and retainers |  |  | $ 16.9 |  |  |  |
Percentage of receivables held as retainer |  |  | 5.00% |  |  |  |
Number of headquarters properties sold | headquarters | 3 |  |  |  |  |  |
Number of headquarters properties | headquarters | 4 |  |  |  |  |  |
Sale leaseback transaction, gross proceeds | $ 58.5 |  |  |  |  |  |
Sale leaseback transaction, net proceeds | 55.5 |  |  |  |  |  |
Properties held-for-sale | 23.4 |  |  |  |  |  |
Gain on sale on properties | $ 32.1 |  |  |  |  |  |
Proceeds from sale of assets |  |  |  |  |  | $ 55.5 | $ 13.8
Gain on sale of assets |  | $ 0.0 |  | $ 0.0 | $ 12.3 | $ 32.1 | $ 12.3
Land |  |  |  |  |  |  |
Sale of Assets [Line Items] |  |  |  |  |  |  |
Proceeds from sale of assets |  |  |  |  | 11.7 |  |
Transfer of customer contracts |  |  |  |  |  |  |
Sale of Assets [Line Items] |  |  |  |  |  |  |
Proceeds from sale of assets |  |  |  |  | $ 2.1 |  |

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- Definition Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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- Definition The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2443-110228 + Details
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