The changes in allowances for expected credit losses for the six months ended June 30, 2025 and 2024, consisted of the following:


	Accounts receivable	Unbilled receivables	Other current assets	Financing receivables	Other assets	Total
Balance at January 1, 2024	($89)	($19)	($50)	($51)	($122)	($331)
Changes in estimates	(15)	(1)	(1)	35	(47)	(29)
Write-offs	7		10			17

Recoveries	1					1
Balance at June 30, 2024	($96)	($20)	($41)	($16)	($169)	($342)

Balance at January 1, 2025	($92)	($38)	($47)	($7)	($199)	($383)
Changes in estimates	(4)	(5)	(9)	3	(44)	(59)
Write-offs	7		1			8

Recoveries	1					1
Other	11					11
Balance at June 30, 2025	($77)	($43)	($55)	($4)	($243)	($422)