Allowances for Losses on Financial Assets - Schedule of Financial Assets, Allowance for Credit Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Contract with Customer, Asset, Allowance for Credit Loss [Roll Forward]
Account receivable, allowance for credit loss, beginning balance	$ (92)	$ (89)
Unbilled receivables, allowance for credit loss, beginning balance	(38)	(19)
Allowance for credit loss, beginning balance	(383)	(331)
Customer financing, allowance for credit loss, beginning balance	(7)	(51)
Accounts receivable, changes in estimates	(4)	(45)
Unbilled receivables, changes in estimates	(4)	(19)
Changes in estimates	(54)	(113)
Customer financing, changes in estimates	7	44
Accounts receivable, write-offs	18	41
Write-offs	146	60
Accounts receivable, recovery	2	1
Recoveries	19	1
Account receivable, allowance for credit loss, ending balance	(76)	(92)
Unbilled receivables, allowance for credit loss, ending balance	(42)	(38)
Allowance for credit loss, ending balance	(272)	(383)
Customer financing, allowance for credit loss, ending balance	0	(7)
Other Current Assets
Contract with Customer, Asset, Allowance for Credit Loss [Roll Forward]
Changes in estimates	(14)	(8)
Write-offs	18	11
Other Assets
Contract with Customer, Asset, Allowance for Credit Loss [Roll Forward]
Changes in estimates	(39)	(85)
Write-offs	110	8
Recoveries	17
Other Current Assets
Contract with Customer, Asset, Allowance for Credit Loss [Roll Forward]
Allowance for credit loss, beginning balance	(47)	(50)
Allowance for credit loss, ending balance	(43)	(47)
Other Assets
Contract with Customer, Asset, Allowance for Credit Loss [Roll Forward]
Allowance for credit loss, beginning balance	(199)	(122)
Allowance for credit loss, ending balance	$ (111)	$ (199)