Restructuring and Related Implementation Charges - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jan. 27, 2022
Restructuring Cost and Reserve [Line Items]
Global Growth and Efficiency Program		$ 0	$ (13)	$ 57
Global Productivity Initiative | Subsequent Event
Restructuring Cost and Reserve [Line Items]
Restructuring and related Cost, estimated to settle through cash, percentage					90.00%
Global Productivity Initiative | Subsequent Event | Employee-Related Costs
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost, percentage					80.00%
Global Productivity Initiative | Subsequent Event | Asset Related Costs
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost, percentage					10.00%
Global Productivity Initiative | Subsequent Event | Other Charges
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost, percentage					10.00%
Global Productivity Initiative | Minimum | Subsequent Event
Restructuring Cost and Reserve [Line Items]
Restructuring program cost before tax					$ 200
Global Productivity Initiative | Maximum | Subsequent Event
Restructuring Cost and Reserve [Line Items]
Restructuring program cost before tax					$ 240
Global Growth and Efficiency Program
Restructuring Cost and Reserve [Line Items]
Restructuring reduction	$ 16
Restructuring reduction after tax	13
Pretax charges related to the Restructuring Program to date				1,854
Restructuring and related cost incurred cost to date after tax				1,380
Global Growth and Efficiency Program				132
Global Growth and Efficiency Program | Employee-Related Costs
Restructuring Cost and Reserve [Line Items]
Pretax charges related to the Restructuring Program to date				706
Global Growth and Efficiency Program | Other Charges
Restructuring Cost and Reserve [Line Items]
Pretax charges related to the Restructuring Program to date				962
Global Growth and Efficiency Program | Selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Restructuring reduction	3
Global Growth and Efficiency Program				60
Global Growth and Efficiency Program | Other (income) expense, net
Restructuring Cost and Reserve [Line Items]
Restructuring reduction	$ 13
Global Growth and Efficiency Program				$ 57