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Restructuring and Other Charges - Schedule of Accrued Liabilities for Restructuring on Balance Sheet (Details) - USD ($)
$ in Millions
Sep. 30, 2021
Dec. 31, 2020
Restructuring Cost and Reserve [Line Items]    
Accrued liabilities for restructuring and other reduction programs $ 152 $ 177
Accounts payable    
Restructuring Cost and Reserve [Line Items]    
Accrued liabilities for restructuring and other reduction programs 35 34
Payroll and benefits payable    
Restructuring Cost and Reserve [Line Items]    
Accrued liabilities for restructuring and other reduction programs 6 29
Employee benefits    
Restructuring Cost and Reserve [Line Items]    
Accrued liabilities for restructuring and other reduction programs 13 22
Deferred credits and other noncurrent liabilities    
Restructuring Cost and Reserve [Line Items]    
Accrued liabilities for restructuring and other reduction programs $ 98 $ 92