Credit Losses on Financial Instruments (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance at December 31, 2022	$ 85
Provision for expected losses	77
Write-offs charged against the allowance	(88)
Recoveries collected	7
Change in allowance in assets held for sale	1
Ending balance at September 30, 2023	82
Held-for-sale, Not Discontinued Operations | EMEA Business
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses classified as held for sale	4	$ 5
Business
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance at December 31, 2022	57
Provision for expected losses	27
Write-offs charged against the allowance	(37)
Recoveries collected	5
Change in allowance in assets held for sale	1
Ending balance at September 30, 2023	53
Mass Markets
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance at December 31, 2022	28
Provision for expected losses	50
Write-offs charged against the allowance	(51)
Recoveries collected	2
Change in allowance in assets held for sale	0
Ending balance at September 30, 2023	$ 29