Credit Losses on Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2024

Credit Loss [Abstract]

Schedule of Financing Receivable, Allowance for Credit Loss

The following table presents the activity of our allowance for credit losses by accounts receivable portfolio for the nine months ended September 30, 2024:

	Business		Mass Markets	Total
	(Dollars in millions)
As of December 31, 2023	$	36	31	67
Provision for expected losses	19		35	54
Write-offs charged against the allowance	(26)		(43)	(69)
Recoveries collected	5		3	8
Ending balance at September 30, 2024	$	34	26	60