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

6 Months Ended

Jun. 30, 2021

Allowance for Losses on Financial Assets [Abstract]

Financial Assets, Allowance for Credit Loss

The changes in allowances for expected credit losses for the six months ended June 30, 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	(246)	(107)	(10)	(9)	(34)	(406)
Write-offs	3					3
Balance at June 30, 2020	($381)	($188)	($48)	($14)	($109)	($740)
Balance at January 1, 2021	($444)	($129)	($72)	($17)	($140)	($802)
Changes in estimates	16		(3)	1	(36)	(22)
Write-offs	15		1			16
Balance at June 30, 2021	($413)	($129)	($74)	($16)	($176)	($808)