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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS
 12 Months Ended
Oct. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
VALUATION AND QUALIFYING ACCOUNTS
SCHEDULE II

VALUATION AND QUALIFYING ACCOUNTS

Description
 
Balance at
Beginning
of Period
 
Additions Charged to
Expenses or
Other Accounts*
 
Deductions Credited to Expenses or Other Accounts**
 
Balance at
End of
Period
 
 
(in millions)
2020
 
 
 
 
 
 
 
 
Tax valuation allowance
 
$
240

 
$
12

 
$
(5
)
 
$
247

2019
 
 
 
 
 
 
 
 
Tax valuation allowance
 
$
79

 
$
169

 
$
(8
)
 
$
240

2018
 
 
 
 
 
 
 
 
Tax valuation allowance
 
$
63

 
$
18

 
$
(2
)
 
$
79

* Additions include current-year additions charged to expense and current-year build due to increases in net deferred tax assets, return to provision true-ups, other adjustments and Other Comprehensive Income ("OCI") impact to deferred taxes. As disclosed in the deferred tax assets and liabilities table in Note 6, "Income taxes," we have increased the 2019 net operating loss deferred tax asset balance by $167 million. There is an offsetting increase in the 2019 valuation allowance, which is reflected in the table above. This change is the result of the correction of an error that has no impact on the balance sheet or statement of operations. Accordingly, we have concluded that this 2019 error is not material.
** Deductions include current-year releases credited to expense and current-year reductions due to decreases in net deferred tax assets, return to provision true-ups, other adjustments and OCI impact to deferred taxes.