Credit Losses on Financial Instruments (Tables)

3 Months Ended

Mar. 31, 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 three months ended March 31, 2024:

	Business		Mass Markets	Total
	(Dollars in millions)
As of December 31, 2023	$	36	31	67
Provision for expected losses	8		15	23
Write-offs charged against the allowance	(10)		(17)	(27)
Recoveries collected	3		1	4
Ending balance at March 31, 2024	$	37	30	67