Restructuring and Other Charges - Balance Sheet Location of Accrued Liabilities for Restructuring and Other Cost Reduction Programs (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Accrued liabilities for restructuring and other reduction programs	$ 240	$ 177	$ 212
Accounts payable
Restructuring Cost and Reserve [Line Items]
Accrued liabilities for restructuring and other reduction programs	34	34
Payroll and benefits payable
Restructuring Cost and Reserve [Line Items]
Accrued liabilities for restructuring and other reduction programs	2	29
Employee benefits
Restructuring Cost and Reserve [Line Items]
Accrued liabilities for restructuring and other reduction programs	88	22
Deferred credits and other noncurrent liabilities
Restructuring Cost and Reserve [Line Items]
Accrued liabilities for restructuring and other reduction programs	$ 116	$ 92