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v3.19.3.a.u2

Property and Equipment | 12 Months Ended
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Dec. 28, 2019
Property, Plant and Equipment [Abstract] |
Property and Equipment | Property and Equipment Property and equipment (which are carried at cost) as of 2019 and 2018 year end are as follows:
(Amounts in millions) |  | 2019 |  | 2018
Land |  | $ | 31.9 |  |  | $ | 31.7 |
Buildings and improvements |  | 405.1 |  |  | 368.6 |
Machinery, equipment and computer software |  | 988.0 |  |  | 944.4 |
Property and equipment – gross |  | 1,425.0 |  |  | 1,344.7 |
Accumulated depreciation and amortization |  | (903.5) |  |  | (849.6) |
Property and equipment – net |  | $ | 521.5 |  |  | $ | 495.1 |
The estimated service lives of property and equipment are principally as follows:
Buildings and improvements |  | 3 to 50 years
Machinery, equipment and computer software |  | 2 to 15 years
Depreciation expense was $70.1 million, $68.8 million and $65.6 million in 2019, 2018 and 2017, respectively.

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 + Details
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