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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS
 12 Months Ended
Dec. 31, 2019
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]  
Schedule II - Valuation and Qualifying Accounts
SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS
For the Years Ended December 31, 2019, 2018 and 2017
 
 
 
 
 
Additions
 
 
 
 
Description
 
Balance at
Beginning
of Period 
 
Charged to
Costs and
Expenses 
 
Charged
to Other Accounts 
 
Deductions
from
Reserves 
 
Balance
at End
of Period 
In thousands of dollars
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
For the year ended December 31, 2019
 
 
 
 
 
 
 
 
 
 
Allowances deducted from assets
 
 
 
 
 
 
 
 
 
 
Accounts receivable—trade, net (a)
 
$
24,610

 
$
159,140

 
$
—

 
$
(158,784
)
 
$
24,966

Valuation allowance on net deferred taxes (b)
 
239,959

 
(26,270
)
 
—

 
(6,946
)
 
206,743

Inventory obsolescence reserve (c)
 
20,136

 
27,157

 
—

 
(25,244
)
 
22,049

Total allowances deducted from assets
 
$
284,705

 
$
160,027

 
$
—

 
$
(190,974
)
 
$
253,758

 
 
 
 
 
 
 
 
 
 
 
For the year ended December 31, 2018
 
 
 
 
 
 
 
 
 
 
Allowances deducted from assets
 
 
 
 
 
 
 
 
 
 
Accounts receivable—trade, net (a)
 
$
41,792

 
$
222,819

 
$
—

 
$
(240,001
)
 
$
24,610

Valuation allowance on net deferred taxes (b)
 
312,148

 
18,413

 
—

 
(90,602
)
 
239,959

Inventory obsolescence reserve (c)
 
19,348

 
32,379

 
—

 
(31,591
)
 
20,136

Total allowances deducted from assets
 
$
373,288

 
$
273,611

 
$
—

 
$
(362,194
)
 
$
284,705

 
 
 
 
 
 
 
 
 
 
 
For the year ended December 31, 2017
 
 
 
 
 
 
 
 
 
 
Allowances deducted from assets
 
 
 
 
 
 
 
 
 
 
Accounts receivable—trade, net (a)
 
$
40,153

 
$
166,993

 
$
—

 
$
(165,354
)
 
$
41,792

Valuation allowance on net deferred taxes (b)
 
235,485

 
92,139

 
—

 
(15,476
)
 
312,148

Inventory obsolescence reserve (c)
 
20,043

 
35,666

 
—

 
(36,361
)
 
19,348

Total allowances deducted from assets
 
$
295,681

 
$
294,798

 
$
—

 
$
(217,191
)
 
$
373,288

 
 
 
 
 
 
 
 
 
 
 

(a) Includes allowances for doubtful accounts, anticipated discounts and write-offs of uncollectible accounts receivable.
(b) Includes adjustments to the valuation allowance for deferred tax assets that we do not expect to realize, as well as the release of valuation allowances. The 2017 deductions from reserves reflects the change in valuation allowance due to the remeasurement of corresponding U.S. deferred tax assets at the lower enacted corporate tax rates resulting from the U.S. tax reform.
(c) Includes adjustments to the inventory reserve, transfers, disposals and write-offs of obsolete inventory.