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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, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Restructuring Cost and Reserve [Line Items]        
Total Global Growth and Efficiency Program charges, pretax $ 27 $ 26 $ 98 $ 115
Total Global Growth and Efficiency Program charges, aftertax 22 22 75 93
Cost of sales        
Restructuring Cost and Reserve [Line Items]        
Total Global Growth and Efficiency Program charges, pretax 1 8 9 19
Selling, general and administrative expenses        
Restructuring Cost and Reserve [Line Items]        
Total Global Growth and Efficiency Program charges, pretax 28 9 42 24
Other (income) expense, net        
Restructuring Cost and Reserve [Line Items]        
Total Global Growth and Efficiency Program charges, pretax (3) 8 43 64
Non-service related postretirement costs        
Restructuring Cost and Reserve [Line Items]        
Total Global Growth and Efficiency Program charges, pretax $ 1 $ 1 $ 4 $ 8