Restructuring and Related Implementation Charges - Summary of Restructuring and Related Costs (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Total Global Growth and Efficiency Program charges, pretax									$ 57	$ 88	$ 152
Global Growth and Efficiency Program
Restructuring Cost and Reserve [Line Items]
Total Global Growth and Efficiency Program charges, pretax									132	161	333
Total Global Growth and Efficiency Program charges, aftertax	$ 27	$ 22		$ 22	$ 32	$ 22	$ 51	$ 20	102	125	246
Global Growth and Efficiency Program | Cost of sales
Restructuring Cost and Reserve [Line Items]
Total Global Growth and Efficiency Program charges, pretax	$ 1	$ 1	$ 3	$ 11	$ 12	$ 8	$ 5	$ 6	8	31	75
Global Growth and Efficiency Program | Selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Total Global Growth and Efficiency Program charges, pretax									60	33	86
Global Growth and Efficiency Program | Other (income) expense, net
Restructuring Cost and Reserve [Line Items]
Total Global Growth and Efficiency Program charges, pretax									57	88	152
Global Growth and Efficiency Program | Non-service related postretirement costs
Restructuring Cost and Reserve [Line Items]
Total Global Growth and Efficiency Program charges, pretax									$ 7	$ 9	$ 20