Credit Losses on Financial Instruments (Details) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($)
Financing Receivable, Allowance for Credit Loss
Beginning balance	$ 36
Provision for expected losses	13
Write-offs charged against the allowance	(15)
Ending balance	34
Business Portfolio
Financing Receivable, Allowance for Credit Loss
Beginning balance	20
Provision for expected losses	3
Write-offs charged against the allowance	(3)
Ending balance	20
Mass Market Portfolio
Financing Receivable, Allowance for Credit Loss
Beginning balance	16
Provision for expected losses	10
Write-offs charged against the allowance	(12)
Ending balance	$ 14