v3.22.0.1
Sales of Certain Receivables - Sales of Service Receivables (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Variable Interest Entity [Line Items]    
Other current assets $ 2,005 $ 2,496
Other current liabilities 967 810
Variable Interest Entity, Not Primary Beneficiary | Factoring Arrangement    
Variable Interest Entity [Line Items]    
Revolving receivables facility, maximum borrowing capacity 950  
Revolving receivables facility, outstanding borrowings 775 772
Other current assets 231 378
Other current liabilities $ 348 $ 357