Credit Losses (Tables)

3 Months Ended

Mar. 31, 2020

Credit Loss [Abstract]

Accounts Receivable, Allowance for Credit Loss

The following table summarizes the activity for the allowance for credit losses for the three months ended March 31, 2020:

($ in millions)	Trade Receivables Allowance for Credit Losses
January 1, 2020	$22
Current-period provision for credit losses	33
Trade receivables written off as uncollectible, net of recoveries	(4)
Foreign currency impact	(1)
March 31, 2020	$50