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Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2019
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Valuation and Qualifying Accounts
DescriptionBalance at
Beginning
of Period		AdditionsDeductions  
Charged to
Costs and
Expenses
Charged to
Other
Accounts(a)
Write-Offs and
Reclassifications		 Balance
at End of
Period
December 31, 2020
Allowances deducted from assets to which they apply
Allowance for doubtful accounts$32 $3 $1 $2 
(b)
$34 
Allowances for sales discounts17 240 (3)238 
(c)
16 
December 31, 2019
Allowances deducted from assets to which they apply
Allowance for doubtful accounts$36 $2 $(1)$5 
(b)
$32 
Allowances for sales discounts17 249 (4)245 
(c)
17 
December 31, 2018
Allowances deducted from assets to which they apply
Allowance for doubtful accounts$38 $15 $(3)$14 
(b)
$36 
Allowances for sales discounts18 248 (4)245 
(c)
17 
(a)Includes bad debt recoveries and the effects of changes in foreign currency exchange rates.
(b)Primarily uncollectible receivables written off.
(c)Sales discounts allowed.
 Additions  
DescriptionBalance at
Beginning
of Period		Charged to
Costs and
Expenses		Charged to
Other
Accounts
Deductions(a)
Balance
at End
of  Period
December 31, 2020
Deferred taxes
Valuation allowance$248 $21 $— $(3)$272 
December 31, 2019
Deferred taxes
Valuation allowance$220 $26 $— $(2)$248 
December 31, 2018
Deferred taxes
Valuation allowance$176 $55 $— $11 $220 
(a)Represents the net currency effects of translating valuation allowances at current rates of exchange.