Allowances for Losses on Financial Assets - Schedule of Financial Assets, Allowance for Credit Loss (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Contract with Customer, Asset, Allowance for Credit Loss [Roll Forward]
Account receivable, allowance for credit loss, beginning balance	$ (89)	$ (116)
Unbilled receivables, allowance for credit loss, beginning balance	(19)	(23)
Allowance for credit loss, beginning balance	(331)	(367)
Customer financing, allowance for credit loss, beginning balance	(51)	(55)
Accounts receivable, changes in estimates	(28)	(8)
Unbilled receivables, changes in estimates	(2)	3
Changes in estimates	(57)	(2)
Customer financing, changes in estimates	41	4
Accounts receivable, write-offs	15	27
Write-offs	26	32
Accounts receivable, recovery	1	4
Recoveries	1	4
Account receivable, allowance for credit loss, ending balance	(101)	(93)
Unbilled receivables, allowance for credit loss, ending balance	(21)	(20)
Allowance for credit loss, ending balance	(361)	(333)
Customer financing, allowance for credit loss, ending balance	(10)	(51)
Other current assets
Contract with Customer, Asset, Allowance for Credit Loss [Roll Forward]
Allowance for credit loss, beginning balance	(50)	(85)
Allowance for credit loss, ending balance	(41)	(65)
Other assets
Contract with Customer, Asset, Allowance for Credit Loss [Roll Forward]
Allowance for credit loss, beginning balance	(122)	(88)
Allowance for credit loss, ending balance	(188)	(104)
Other current assets
Contract with Customer, Asset, Allowance for Credit Loss [Roll Forward]
Changes in estimates	(2)	15
Write-offs	11	5
Other assets
Contract with Customer, Asset, Allowance for Credit Loss [Roll Forward]
Changes in estimates	$ (66)	$ (16)