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Components of Restructuring Costs (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Restructuring Cost And Reserve [Line Items]      
Restructuring charges $ 117 $ 70 $ 285
Employee Termination Costs      
Restructuring Cost And Reserve [Line Items]      
Restructuring charges 116 78 194
Reserve adjustments (16) (19) (14)
Contract Termination and Other Costs      
Restructuring Cost And Reserve [Line Items]      
Restructuring charges 10 5 27
Asset Impairments      
Restructuring Cost And Reserve [Line Items]      
Restructuring charges 7 6 78
Cost of Goods Sold      
Restructuring Cost And Reserve [Line Items]      
Restructuring charges 35 27 118
Cost of Goods Sold | Employee Termination Costs      
Restructuring Cost And Reserve [Line Items]      
Restructuring charges 38 31 72
Reserve adjustments (8) (9) (1)
Cost of Goods Sold | Contract Termination and Other Costs      
Restructuring Cost And Reserve [Line Items]      
Restructuring charges 4   9
Cost of Goods Sold | Asset Impairments      
Restructuring Cost And Reserve [Line Items]      
Restructuring charges 1 5 38
Selling, General and Administrative Expenses      
Restructuring Cost And Reserve [Line Items]      
Restructuring charges 63 45 103
Selling, General and Administrative Expenses | Employee Termination Costs      
Restructuring Cost And Reserve [Line Items]      
Restructuring charges 57 47 109
Reserve adjustments (6) (8) (11)
Selling, General and Administrative Expenses | Contract Termination and Other Costs      
Restructuring Cost And Reserve [Line Items]      
Restructuring charges 6 5 5
Selling, General and Administrative Expenses | Asset Impairments      
Restructuring Cost And Reserve [Line Items]      
Restructuring charges 6 1  
Research and Development Expenses      
Restructuring Cost And Reserve [Line Items]      
Restructuring charges 19 (2) 64
Research and Development Expenses | Employee Termination Costs      
Restructuring Cost And Reserve [Line Items]      
Restructuring charges 21   13
Reserve adjustments $ (2) $ (2) (2)
Research and Development Expenses | Contract Termination and Other Costs      
Restructuring Cost And Reserve [Line Items]      
Restructuring charges     13
Research and Development Expenses | Asset Impairments      
Restructuring Cost And Reserve [Line Items]      
Restructuring charges     $ 40