Allowance for Losses on Financial Assets Allowance for Losses on Financial Assets (Tables)

3 Months Ended

Mar. 31, 2021

Allowance for Losses on Financial Assets [Abstract]

Financial Assets, Allowance for Credit Loss

The changes in allowances for expected credit losses for the three months ended March 31, 2021 and 2020 consisted of the following:

	Accounts receivable, net	Unbilled receivables, net	Other current assets, net	Customer financing, net	Other assets, net	Total
Balance at January 1, 2020	($138)	($81)	($38)	($5)	($75)	($337)
Changes in estimates	(29)	1	(10)			(38)
Write-offs	1					1
Balance at March 31, 2020	($166)	($80)	($48)	($5)	($75)	($374)
Balance at January 1, 2021	($444)	($129)	($72)	($17)	($140)	($802)
Changes in estimates	10	(1)	(6)		(42)	(39)
Write-offs	1					1
Balance at March 31, 2021	($433)	($130)	($78)	($17)	($182)	($840)