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Allowances for Losses on Financial Assets
3 Months Ended
Mar. 31, 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 three months ended March 31, 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(16)(1)(1)15 (10)(13)
Write-offs11 
Recoveries
Balance at March 31, 2024
($102)($20)($42)($36)($132)($332)
Balance at January 1, 2025($92)($38)($47)($7)($199)($383)
Changes in estimates1 (3)1 3 (38)(36)
Write-offs3 3 
Recoveries1 1 
Balance at March 31, 2025
($87)($41)($46)($4)($237)($415)