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Property, Plant and Equipment
9 Months Ended
Sep. 25, 2020
Property, Plant and Equipment  
Property, Plant and Equipment Disclosure
7.Property, Plant and Equipment
The gross carrying amount and accumulated depreciation of property, plant and equipment were comprised of the following at the end of each period:
September 25,
2020
December 27, 2019
Property, plant and equipment, gross$1,901.2 $1,900.1 
Less: accumulated depreciation(1,049.8)(1,003.6)
Property, plant and equipment, net$851.4 $896.5 

Depreciation expense was as follows:
Three Months EndedNine Months Ended
September 25,
2020
September 27,
2019
September 25,
2020
September 27,
2019
Depreciation expense$25.5 $24.5 $75.7 $73.7