Allowance for Losses on Financial Assets (Tables)

12 Months Ended

Dec. 31, 2021

Credit Loss [Abstract]

Financial Assets, Allowance for Credit Loss

The change in allowances for expected credit losses for the years ended December 31, 2021 and 2020 consisted of the following:

	Accounts receivable	Unbilled receivables	Other Current Assets	Customer financing	Other Assets	Total
Balance at January 1, 2020	($138)	($81)	($38)	($5)	($75)	($337)
Changes in estimates	(314)	(48)	(34)	(12)	(66)	(474)
Write-offs	8					8
Recoveries					1	1
Balance at December 31, 2020	(444)	(129)	(72)	(17)	(140)	(802)
Balance at January 1, 2021	(444)	(129)	(72)	(17)	(140)	(802)
Changes in estimates	(24)	(11)	6	(1)	(59)	(89)
Write-offs	77	49	4		13	143
Recoveries	1					1
Balance at December 31, 2021	($390)	($91)	($62)	($18)	($186)	($747)