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PROPERTY, PLANT AND EQUIPMENT, NET
12 Months Ended
Oct. 31, 2019
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT, NET PROPERTY, PLANT AND EQUIPMENT, NET

 
October 31,
 
2019
 
2018
 
(in millions)
Land
$
57

 
$
55

Buildings and leasehold improvements
1,012

 
952

Machinery and equipment
546

 
512

Software
160

 
141

Total property, plant and equipment
1,775

 
1,660

Accumulated depreciation and amortization
(925
)
 
(838
)
Property, plant and equipment, net
$
850

 
$
822



There were no asset impairments in 2019 and 2017 and less than $1 million asset impairments in 2018. Depreciation expenses were $111 million in 2019, $102 million in 2018 and $94 million in 2017. In 2019 we retired approximately $23 million of fully depreciated assets that were no longer in use.