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Schedule II
 12 Months Ended
Dec. 31, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
Description
 
Balance at
Beginning of Year
 
Charges to
Costs and
Expenses (a)
 
Deductions to
Allowances for
Uncollectible
Accounts (b)
 
Charges to
(Deductions from)
Other Accounts (c)
 
Balance at
End of Year
Year Ended December 31, 2018:
 
 
 
 
 
 
 
 
 
 
Allowances for uncollectible accounts (d)
 
$
98

 
19

 
(19
)
 
(30
)
 
$
68

Year Ended December 31, 2017:
 
 
 
 
 
 
 
 
 
 
Allowances for uncollectible accounts and sales returns and allowances
 
$
119

 
14

 
(18
)
 
(17
)
 
$
98

Year Ended December 31, 2016:
 
 
 
 
 
 
 
 
 
 
Allowances for uncollectible accounts and sales returns and allowances
 
$
119

 
9

 
(11
)
 
2

 
$
119


(a) Represents allowances for uncollectible accounts established through selling, general and administrative expenses.
(b) Represents actual write-offs of uncollectible accounts.
(c) Represents net change in allowances for sales returns, recorded as contra-revenue.
(d) Due to the adoption of FASB ASC Topic 606 effective January 1, 2018, the allowance for sales returns has been prospectively reclassified from Trade accounts receivable, net to Other current liabilities within the consolidated balance sheets and is not included in the ending balance for 2018 above. Prior period balances remain unchanged.