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Receivables, net (Tables)
 3 Months Ended
Mar. 31, 2020
Receivables [Abstract]  
Rollforward of Allowance for Doubtful Accounts

Activity in the allowance for doubtful accounts are as follows (in millions):

 

 

March 31, 2020

 

Allowance for doubtful accounts

 

 

 

 

Beginning balance

 

$

16

 

Cumulative effect of accounting change

 

 

6

 

Additions charged to expenses

 

 

4

 

Ending balance

 

$

26