Restructuring and Related Implementation Charges - Summary of Restructuring and Related Costs (Details) - Global Growth and Efficiency Program - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Restructuring Cost and Reserve [Line Items]
Total Global Growth and Efficiency Program charges, pretax	$ (16)	$ 27	$ (16)	$ 98
Total Global Growth and Efficiency Program charges, aftertax		22		75
Cost of sales
Restructuring Cost and Reserve [Line Items]
Total Global Growth and Efficiency Program charges, pretax		1		9
Selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Total Global Growth and Efficiency Program charges, pretax		28		42
Other (income) expense, net
Restructuring Cost and Reserve [Line Items]
Total Global Growth and Efficiency Program charges, pretax		(3)		43
Non-service related postretirement costs
Restructuring Cost and Reserve [Line Items]
Total Global Growth and Efficiency Program charges, pretax		$ 1		$ 4