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Receivables, net
 12 Months Ended
Dec. 31, 2019
Receivables [Abstract]  
Receivables, net

4. Receivables, net

Receivables are recorded and carried at the original invoiced amount less an allowance for doubtful accounts.

The allowance for doubtful accounts reflects the Company’s best estimate of probable losses inherent in the accounts receivable balance. Activity in the allowance for doubtful accounts was as follows (in millions):

 

 

December 31,

 

 

 

2019

 

 

2018

 

 

2017

 

Allowance for doubtful accounts

 

 

 

 

 

 

 

 

 

 

 

 

Beginning balance

 

$

27

 

 

$

29

 

 

$

34

 

Additions (deductions) charged to expenses

 

 

(2

)

 

 

2

 

 

 

3

 

Charge-offs and other

 

 

(9

)

 

 

(4

)

 

 

(8

)

Ending balance

 

$

16

 

 

$

27

 

 

$

29