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PROPERTY, PLANT AND EQUIPMENT, NET
 12 Months Ended
Oct. 31, 2022
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT, NET PROPERTY, PLANT AND EQUIPMENT, NET
Property, plant and equipment as of October 31, 2022 and 2021, consisted of the following:
 October 31,
 20222021
 (in millions)
Land$59 $61 
Buildings and leasehold improvements1,255 1,147 
Machinery and equipment674 638 
Software260 221 
Total property, plant and equipment2,248 2,067 
Accumulated depreciation and amortization(1,148)(1,122)
Property, plant and equipment, net$1,100 $945 

There were no asset impairments in 2022. During 2021 and 2020 we recorded asset impairments of $2 million and $6 million, respectively. In 2020 asset impairments related to the shutdown of our sequencer development program. Depreciation expenses were $120 million in 2022, $122 million in 2021 and $119 million in 2020. In 2022 and 2021 we retired approximately $48 million and $35 million, respectively, of assets, the majority of which were fully depreciated and no longer in use.