Credit Losses on Financial Instruments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 114	$ 191
Provision for expected losses	133	105
Write-offs charged against the allowance	(175)	(177)
Recoveries collected	16	19
Classified/ Change in allowance in assets held for sale	(3)	(24)
Ending balance	85	114
Business
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	88	109
Provision for expected losses	25	50
Write-offs charged against the allowance	(61)	(76)
Recoveries collected	10	13
Classified/ Change in allowance in assets held for sale	(5)	(8)
Ending balance	57	88
Business | Revision of Prior Period, Reclassification, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance		12
Mass Markets
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	26	82
Provision for expected losses	108	55
Write-offs charged against the allowance	(114)	(101)
Recoveries collected	6	6
Classified/ Change in allowance in assets held for sale	2	(16)
Ending balance	$ 28	26
Consumer | Revision of Prior Period, Reclassification, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance		$ 70