Allowances for Losses on Financial Assets - Schedule of Financial Assets, Allowance for Credit Loss (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Contract with Customer, Asset, Allowance for Credit Loss [Roll Forward]
Account receivable, allowance for credit loss, beginning balance	$ (116)	$ (390)
Unbilled receivables, allowance for credit loss, beginning balance	(23)	(91)
Allowance for credit loss, beginning balance	(367)	(747)
Customer financing, allowance for credit loss, beginning balance	(55)	(18)
Accounts receivable, changes in estimates	(8)
Unbilled receivables, changes in estimates	3	19
Changes in estimates	(2)	(66)
Customer financing, changes in estimates, rounding		(38)
Customer financing, changes in estimates	4	(39)
Accounts receivable, write-offs	27	246
Unbilled receivables, write-offs		47
Write-offs	32	427
Accounts receivable, recovery	4	5
Recoveries	4	5
Account receivable, allowance for credit loss, ending balance	(93)	(139)
Unbilled receivables, allowance for credit loss, ending balance	(20)	(25)
Customer financing, allowance for credit loss, ending balance	(51)	(56)
Allowance for credit loss, ending balance	(333)	(381)
Other current assets
Contract with Customer, Asset, Allowance for Credit Loss [Roll Forward]
Allowance for credit loss, beginning balance	(85)	(62)
Changes in estimates	15	(16)
Write-offs	5	1
Allowance for credit loss, ending balance	(65)	(77)
Other assets
Contract with Customer, Asset, Allowance for Credit Loss [Roll Forward]
Allowance for credit loss, beginning balance	(88)	(186)
Changes in estimates	(16)	(31)
Write-offs		133
Allowance for credit loss, ending balance	$ (104)	$ (84)