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Accrued Expenses And Other Current Liabilities (Details) - USD ($)
$ in Millions
Sep. 30, 2021
Dec. 31, 2020
Payables and Accruals [Abstract]    
Compensation and benefits $ 1,578 $ 1,607
Customer volume and other incentives 267 266
Income taxes 35 34
Professional fees 189 143
Other 349 469
Total accrued expenses and other current liabilities $ 2,418 $ 2,519