Accounts Receivable, Net (Tables)

12 Months Ended

Dec. 31, 2021

Accounts receivable, net were as follows:


	December 31,
	2021		2020
Invoiced	$	660	$	735
Accrued (1)	216		217
Allowance for doubtful accounts	(58)		(69)
Accounts receivable, net	$	818	$	883

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(1)Accrued receivables includes amounts to be invoiced in the subsequent quarter for current services provided.

Allowance for doubtful accounts

The allowance for doubtful accounts was as follows:


Balance at December 31, 2019	$	55
Provision	35
Charge-offs	(22)
Recoveries and other(1)	1
Balance at December 31, 2020	$	69
Provision	8
Charge-offs	(18)
Recoveries and other(1)	(1)
Balance at December 31, 2021	$	58

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(1)Includes the impacts of foreign currency translation and adjustments to reserves necessary to reflect events of non-payment such as customer accommodations and contract terminations.

Accounts receivable sales activity

Accounts receivable sales activity was as follows:


	Year Ended December 31,
	2021		2020		2019
Accounts receivable sales(1)	$	478	$	333	$	393

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(1)Losses on sales were not material. Customers may also enter into structured-payable arrangements that require us to sell our receivables from that customer to a third-party financial institution, which then makes payments to us to settle the customer's receivable. In these instances, we ensure the sale of the receivables are bankruptcy-remote and the payment made to us is without recourse. The activity associated with these arrangements is not reflected in this disclosure, as payments under these arrangements have not been material and these are customer directed arrangements.