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Allowances for Losses on Financial Assets
 9 Months Ended
Sep. 30, 2025
Allowance for Losses on Financial Assets [Abstract]  
Allowances for Losses on Financial Assets Allowances for Losses on Financial Assets
The changes in allowances for expected credit losses for the nine months ended September 30, 2025 and 2024, consisted of the following:
Accounts receivable Unbilled receivablesOther current assets
Financing receivables
Other assetsTotal
Balance at January 1, 2024($89)($19)($50)($51)($122)($331)
Changes in estimates(28)(2)(2)41 (66)(57)
Write-offs15 11 26 
Recoveries1 1 
Balance at September 30, 2024
($101)($21)($41)($10)($188)($361)
Balance at January 1, 2025($92)($38)($47)($7)($199)($383)
Changes in estimates(11)(4)(17)7 (25)(50)
Write-offs15 17 32 
Recoveries1 1 
Other
12 12 
Balance at September 30, 2025
($75)($42)($47) ($224)($388)