Credit Losses on Financial Instruments (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance at December 31, 2021	$ 114
Provision for expected losses	56
Write-offs charged against the allowance	(81)
Recoveries collected	9
Change in allowance in assets held for sale	5
Ending balance at March 21, 2022	103
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	(32)
Recoveries collected	8
Change in allowance in assets held for sale	0
Ending balance at March 21, 2022	83
Mass Markets
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance at December 31, 2021	26
Provision for expected losses	37
Write-offs charged against the allowance	(49)
Recoveries collected	1
Change in allowance in assets held for sale	5
Ending balance at March 21, 2022	$ 20