Credit Losses on Financial Instruments (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance at December 31, 2021	$ 114
Provision for expected losses	99
Write-offs charged against the allowance	(135)
Recoveries collected	14
Foreign currency exchange rate change adjustment	(1)
Change in allowance in assets held for sale	2
Ending balance at September 30, 2022	95
Disposal Group, Held-for-sale, Not Discontinued Operations
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for doubtful accounts	19	$ 24
Business
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance at December 31, 2021	88
Provision for expected losses	19
Write-offs charged against the allowance	(47)
Recoveries collected	9
Foreign currency exchange rate change adjustment	(1)
Change in allowance in assets held for sale	(1)
Ending balance at September 30, 2022	69
Mass Markets
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance at December 31, 2021	26
Provision for expected losses	80
Write-offs charged against the allowance	(88)
Recoveries collected	5
Foreign currency exchange rate change adjustment	0
Change in allowance in assets held for sale	3
Ending balance at September 30, 2022	$ 26