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Business Optimization Charges - Components of Restructuring Charges (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Restructuring Cost and Reserve [Line Items]        
Charges $ 7 $ 52 $ 32 $ 77
Cost of Goods Sold        
Restructuring Cost and Reserve [Line Items]        
Charges 7 8 15 24
Selling, General and Administrative Expenses        
Restructuring Cost and Reserve [Line Items]        
Charges 3 26 19 26
Research and Development Expenses        
Restructuring Cost and Reserve [Line Items]        
Charges (3) 18 (2) 27
Employee termination costs        
Restructuring Cost and Reserve [Line Items]        
Charges 3 49 22 57
Employee termination costs | Cost of Goods Sold        
Restructuring Cost and Reserve [Line Items]        
Charges 3 6 5 6
Employee termination costs | Selling, General and Administrative Expenses        
Restructuring Cost and Reserve [Line Items]        
Charges 3 26 19 25
Employee termination costs | Research and Development Expenses        
Restructuring Cost and Reserve [Line Items]        
Charges (3) 17 (2) 26
Contract termination costs        
Restructuring Cost and Reserve [Line Items]        
Charges   1   8
Contract termination costs | Cost of Goods Sold        
Restructuring Cost and Reserve [Line Items]        
Charges   1   8
Contract termination costs | Selling, General and Administrative Expenses        
Restructuring Cost and Reserve [Line Items]        
Charges   0   0
Contract termination costs | Research and Development Expenses        
Restructuring Cost and Reserve [Line Items]        
Charges   0   0
Asset impairments        
Restructuring Cost and Reserve [Line Items]        
Charges 2 2 8 12
Asset impairments | Cost of Goods Sold        
Restructuring Cost and Reserve [Line Items]        
Charges 2 1 8 10
Asset impairments | Selling, General and Administrative Expenses        
Restructuring Cost and Reserve [Line Items]        
Charges 0 0 0 1
Asset impairments | Research and Development Expenses        
Restructuring Cost and Reserve [Line Items]        
Charges 0 $ 1 0 $ 1
Contract termination and other costs        
Restructuring Cost and Reserve [Line Items]        
Charges 2   2  
Contract termination and other costs | Cost of Goods Sold        
Restructuring Cost and Reserve [Line Items]        
Charges 2   2  
Contract termination and other costs | Selling, General and Administrative Expenses        
Restructuring Cost and Reserve [Line Items]        
Charges 0   0  
Contract termination and other costs | Research and Development Expenses        
Restructuring Cost and Reserve [Line Items]        
Charges $ 0   $ 0